CN109217151A - Electric substation's installation engineering method - Google Patents

Abstract

The present invention provides a kind of electric substation's installation engineering method, belong to construction engineering technical field, the step of engineering method includes: dry-type transformer installation, transformer primary connection, transformer accessory installation, 10kV switchgear is in place, cabinet body is fixedly mounted, switch cabinet bus installation, equipment debugging in switchgear, low-tension switch cabinet is in place, cabinet body is fixedly mounted, the installation of low tension switch bus, low-voltage switch equipment debugging, low-voltage bus bar positioning, low-voltage bus bar installation, equipment connection, equipment connection, cable testing bridge installation, branch, the installation of hanger, the assembling of cable testing bridge and ground connection, cable laying, debug power transmission scheme, electrical equipment Adjustment Tests, the monomer assays of electrical equipment, total group test, the transmission operation of electrical equipment.Electric substation's installation engineering method specification construction links, so that sequence of construction obtains effective guarantee, order is clear, and front and back procedure connection, cooperation and transition are good, can make good matching program in work progress at the scene.

Description

Electric substation's installation engineering method

Technical field

The present invention relates to construction engineering technical field, specifically a kind of electric substation's installation engineering method.

Background technique

In general, electric substation is to be converted in electric system to the voltage and current of electric energy, collect the place for neutralizing distribution. To guarantee the quality of electric energy and the safety of equipment, progress voltage adjustment, trend is also needed (respectively to save in electric system in electric substation Point and the voltage in branch, electric current and power flow direction and distribution) control and electric line and main electrical equipment guarantor Shield.

Electric substation is the connection point in power network, to voltage of transformation, exchange power and collects, distributes setting for electric energy It applies.There is the power distribution equipment of different voltages in electric substation, power transformer, control, protection, measurement, signal and communications facility, and Secondary circuit power supply etc..Due also to factors, the installing such as reactive balance, system stabilization and over-voltage are in parallel in some electric substations Capacitor, shunt reactor, static passive compensation device, compensator with series capaci tance, synchronous capacitor etc..

Electric substation's key facility includes power distribution equipment, power transformer, control equipment, protection automatic device, communications facility With compensation device etc..

Architectural engineering under the prior art is lack of standardization for the construction link of 10kV electric substation, nonstandard, constructs suitable Sequence is chaotic, and front and back process divergence does on-the-spot guidance without good matching program.

Summary of the invention

Technical assignment of the invention is to solve the deficiencies in the prior art, provides a kind of electric substation's installation engineering method.

The technical scheme is that realize in the following manner, electric substation's installation engineering method, it is characterised in that should The step of engineering method includes: dry-type transformer installation, transformer primary connection, transformer accessory installation, and 10kV switchgear is in place, cabinet Body is fixedly mounted, and equipment debugging in switch cabinet bus installation, switchgear, low-tension switch cabinet is in place, cabinet body is fixedly mounted, and low pressure is opened Close bus installation, low-voltage switch equipment debugging, low-voltage bus bar positioning, low-voltage bus bar installation, equipment connection, equipment connection, cable Gantry installation, the installation of branch, hanger, the assembling of cable testing bridge and ground connection, cable laying, shrink cable termination connector production peace Dress, stripping cable, installation ground line, wrapping filling glue install trident gloves, install insulating sleeve, stripping metal screen layer, half Conductive, insulating layer crimps connecting terminal, installs cold events insulating part, lapped insulation band, cold contract cable middle joint production peace Dress, cable centre point location strip cable sheath, and stripping metal screen layer, semiconductive, insulating layer cover insulating cold collapsible tube, lead Body connection, installs cold events adapter body, restores metallic shield, installs oversheath band, and grounded screen installation, grounding body connection connect Ground body is embedded, ground line installation, ground resistance measurement, electrical test, power cable test, wireline test, grounded screen test, after Electric protection debugging, secondary circuit Insulation Test, voltage, current transformer test, secondary circuit inspection, relay, protective device Debugging, total group test, primary current and operating voltage are examined, debugging power transmission scheme, electrical equipment Adjustment Tests, electrical equipment Monomer assays, total group test, the simulation test of electrical equipment, the transmission operation of electrical equipment.

The step of engineering method further include: the installation of high-voltage board, low-voltage cabinet, distribution box, breaker installation, cable, electric wire apply If bus duct is constructed, equipment point part inspection, bracket production and installation, socket sealed busbar trunking installation, trial operation examination, switch are inserted Seat, lamp installation.

The step of electrical test includes: transformer test, the test of 10kV switchgear, circuit-breaker testing, voltage transformer examination It tests, current transformer test, the bulk testing of switchgear, test of lightning arrester.

Generated beneficial effect is the present invention compared with prior art:

Electric substation's installation engineering method specification construction links, so that sequence of construction obtains effective guarantee, order Clearly, front and back procedure connection, cooperation and transition are good, can make good matching program in work progress at the scene, side Just the guidance constructed effectively avoids process disorder, avoids the generation of rework aspect, has practical job guide meaning.

Electric substation's installation engineering method design is reasonable, structure is simple, safe and reliable, easy to use, easy to maintain, has Good popularizing value.

Specific embodiment

Electric substation's installation engineering method of the invention is described in detail below below.

The step of electric substation's installation engineering method of the invention includes:

Dry-type transformer installation:

(1) transformer is during handling, unified command scheduling.

(2) using crane tool handling when, the supporting leg of crane tool must be consolidated, uniform force.It should be accurately using change The hanging ring on depressor top, suspension hook should be directed at transformer center of gravity, and the angle hung between wirerope is not greater than 60 °.It must be tried when lifting It hangs, prevents cable wire clashing and breaking bushing shell for transformer.During lifting, anyone is forbidden to pass through or stay below boom and hanging object, The equipment sling must not stop for a long time in the sky.

(3) transformer take people to lift and lay railway sleepers in place, groove steel rail it is the methods of in place.

1) small capacity transformer (50kVA and following) can take people to lift method, it is necessary to act in agreement with shoulder, take concerted action.

2) larger capacity transformer, can take lay railway sleepers, groove steel rail it is in place, sleeper, groove steel rail laying must put down It is steady securely, at transformer two sides and rear portion with the chassis of crooked chisel or wooden stick " point " transformer, along groove steel rail to basic direction It moves in place, or the foot of a wall portion sets draw hook in transformer room, transformer bottom is bound securely with wirerope, uses chain block By transformer from groove steel rail from outdoors to indoor traction in place.It is unsuitable too fast when in place mobile, must not collide and Should not there are serious impact and concussion, in case damage insulating component, will prevent transformer from skidding off track and inclining when in place mobile Measure, unified command, unified signal, firmly uniformly, speed will slowly be coordinated mutually.

3) transformer of idler wheel is housed, after in place, idler wheel should be fixed with the brake apparatus that can be dismantled or will be rolled Wheel disassembly.

4) dry-type transformer answers horizontal stable to place and installs firm, and bottom paves liftoff, quakeproof rubber pad with quakeproof rubber pad Thickness cannot be less than 30mm, to reduce noise.

5) after transformer installation, sleeve surface is answered bright and clean, should not there is phenomena such as crackle, damaged；Temperature control device, casing crimping The components such as bolt are answered complete, and shell is clean；Forbid there is foreign matter to leave between transformer high-voltage, low-voltage coil.

Transformer primary connection:

(1) bracket of transformer line is solid and reliable by design and construction, absolute altitude error, horizontal error no more than 5mm, with Earth mat connection is reliable.

(2) high and low pressure cable (bus containing plug-in type) ditch inlet and outlet should be prevented fires, anti-toy blocks.

(3) cable termination component and connecting terminal meet design requirement, and cable termination is connect reliably with lead, and faying surface is clear Clean, smooth, non-oxidation layer, is coated with electric force compounded grease, meets code requirement.It must be soft company that plug-in type bus is connect with transformer It connects and should be there are nargin, noise that when absorbable transformer station high-voltage side bus generates shakes and ambient enviroment is avoided to make because of earthquake, displacement etc. At interruption of service and play the role of auxiliary heat dissipation.

(4) transformer body ground line section is not less than neutral conductor section 1/2, and minimum cannot be less than 70mm²。

(5) iron core of dry-type transformer and metalwork, the protective grounding with shield dry-type transformer metal cabinet, change Depressor neutral ground line is independently connected with electric house-owner's grounded screen respectively, and ground line both ends must be crimped or be welded with connecting terminal It connects, ground connection should be reliable, and fastener and locking part are complete, and the connection with main grounding grid should meet design and code requirement.

(6) exposed live part preferably carries out insulation processing (installing high-low pressure insulating sheath additional).

(7) single-core cable is fixed forbids to be bound with magnetic conduction line metal.

(8) paired cable inlet-outlet line connecting terminal must be overlapped in the sub- two sides of appliance terminal respectively.

(9) transformer high-low-voltage wiring application galvanized bolt connects, and bolt used should have plain washer and spring shim, bolt After fastening, bolt preferably exposes 2~3 screw threads.High corrosion area, preferably uses hot galvanizing bolt.

(10) high-low pressure inlet-outlet line answers phase correspondence, phase colour code to know correct clear.

Transformer accessory installation:

(1) fan motor and blade firmly install, and should rotate flexibly, no card resistance；Without friction, overheat is answered when preliminary operation；Blade Answer distortionless deformation or situations such as with air duct grazing；Fan power voltage should meet its voltage rating, and the blower of three phase mains is wanted Phase sequence is distinguished, is operated with Fan-free abnormal.Temperature control device reliable in action, instruction are correct.

(2) fire-fighting equipment is configured according to the requirement of design drawing and inspection unit in transformer room.

(3) non-enclosed transformer should install fixed cover bar in room, and cover bar should meet related to the clear distance of transformer gabarit Standard；Cover bar height, the size in hole, cover bar suspension mark, caution board etc. check and accept related mark referring to design drawing and superior unit Quasi- and file requirement setting.

Switchgear installation:

Switchgear is in place, cabinet body is fixedly mounted:

(1) switchgear is in place:

1) check drawing, determine cabinet number, put sequence and placement position.

2) switchgear is during handling, if special messenger is responsible for unified command, the command signal that commanding issues is necessary Clearly, accurately.

3) by assisting mobile tool or manpower transport, progress cabinet body is in place in numerical order, cabinet eye, hitch is delimited, with head Extend on the basis of the cabinet of face by propagation direction positioning and puts.

4) switchgear handling process wants fixed, to prevent unbalance stress, cabinet body deformation or damage component.

5) the vertical adjustment of disk cabinet group, is adjusted between basis using 0.5~1mm gasket, and every place's gasket is at most no more than 3 Piece is equipped with bolt using producer between each cabinet and is fastenedly connected.

(2) cabinet body is fixedly mounted:

1) it is connected with securely on the basis of First position-sensing switch cabinet with extension extending switch cabinet, connects bolt power between each cabinet Square meets different product model prescribed requirement.

2) cabinet body is connected firmly with basic section steel, cabinet single side or in column install when be connected with securely, adjacent two cabinet top Portion's horizontal error < 2mm；Cabinet top portion horizontal error < 5mm in column；Vertical error < 1.5mm/m；Disk error: adjacent two cabinet side < 1mm, in column cabinet face < 5mm；Cabinet seam < 2mm.

3) cabinet body ground connection is solid and reliable, has every section of cabinet of cabinet body of crash roll to have two o'clock or more to be obviously grounded, and conducting is good, weldering Spreading degree meets related request.

4) the openable cabinet of electric appliance (screen) door is housed, is connected with multiply soft copper conducting wire, section > 4mm², stranded conductor End answers line tight, adds terminal attachment or wards off tin processing, must not be loose, stranded.

5) cabinet intraoral illumination is complete, and mechanical latching, electric appliance block action are accurate and reliable, and electric heater unit is normal, electrification in high voltage Display is normal.

6) center line of dynamic and static contact should be consistent, and contact is close.

7) switching point of secondary circuit auxiliary switch should act accurately, and contact is reliable；Secondary circuit between handcart and cabinet body It is good to connect interposer contact.

8) handcart push-and-pull flexibly it is light, without card resistance collision phenomenon, the handcart of same model can exchange.

9) contact between handcart and cabinet body is close, and when in handcart push-in cabinet, grounding contact should be than main contact elder generation Contact, grounding contact after main contact than disconnecting when pull-out, after being pushed into operating position, at the top of moving contact with the gap of static contact bottom Meet product requirement.

10) safety barrier plate is opened flexibly, the corresponding actions with the disengaging of handcart, " five is anti-" device of electric misoperation prevention Flexible movements are reliable.

Equipment debugging in bus installation, switchgear:

(1) bus is installed:

1) upper and lower bus and fixed device are without wedge angle, burr.

2) hard bus any surface finish is smooth, including bending part should not have crackle, gauffer, field trash and deformation and distortion Phenomenon.

3) the fixed hard bus faying surface of bolt is answered smooth, and silver coating should not have pitted skin, peeling and unmasked portion, plating Silver layer contact surface must not arbitrarily be ground, and insulator should clean not damaged.

4) it should be worn from lower to upper when bus horizontal through bolt, remaining situation lower nut should be placed in maintenance side, bolt length Preferably expose 2~3 screw thread of nut.

5) should there be washer through bolted two outside of bus, there should be the clear distance of 3mm or more between adjacent bolt washer, Answer shock mount washer locking nut in nut side.

6) bolt strained uniformly the connecting terminal of electric appliance should to be made by extra-stress.

7) bus connects close, and connection bolt is fastened with torque spanner, and Tightening moment meets regulation (different size type Number switchgear torque presses prescribed requirement use).

8) answered between bus bar fixing hardware and support insulator it is smooth be fixed from angle, balance the mother that it should not be made to be supported Line is by extra-stress.

9) when bus horizontal, bus supports the top hold-down of clamping plate that should keep the gap 1~1.5mm with bus, works as bus When vertically-arranged, top hold-down should keep the gap 1.5~2mm with bus, and alternate and distance to the ground should meet design and specification installation is wanted It asks.

10) ac bus arranged up and down is arranged as A, B, C phase, horizontally disposed ac bus, after cabinet from top to bottom It is arranged as A, B, C phase to cabinet face, the bus of downlead is arranged as A, B, C phase from left to right, and three-phase alternating current bus color is respectively A, the corresponding yellow of B, C, green, red.

11) after switchgear installation, the copper earth plate between each switchgear is connected with connection copper sheet, equipment and protection Ground connection meets design requirement.

12) exposed part of monolithic bus and multi-disc bus has phase color insulation processing, and the bolt of bus, which connects, to be supported There should not be insulating cement within junction, bus and electrical junction 10mm, bolted on part should fill insulating sheath connector box.

(2) equipment debugging in switchgear:

1) check that the running part of operating mechanism is flexible, it is each to connect bolt non-loosening.

2) after checking spring energy-storage, auxiliary switch cuts off motor power, and after combined floodgate, auxiliary switch is automatic Connect motor power.

3) after switching-in spring energy storage, the lower end of draw bar or cam are reliably locked with each switch-on latching.

4) flexible movements of switching on and off blocking device, it is reliable, reset it is accurate, rapidly.

5) after mechanism closes a floodgate, it is reliably maintained at closing position, spring mechanism draft gear travel is adjusted, meets the technology of product Regulation.

6) in place, switching on and off instruction is accurate for vacuum switch contact.

7) check and adjust in cabinet the integrality of " five is anti-" device element, it is ensured that flexible operation is reliable.

8) overall appearance inspection meets installation requirement after the completion of equipment is installed and debugged, and clears up construction site sundries.

Low-tension switch cabinet is in place, cabinet body is fixedly mounted:

(1) low-tension switch cabinet is in place:

1) check drawing, determine cabinet number, put sequence and placement position.

2) monomer cabinet or Combined low-tension switch cabinet are put by designated position.

3) combination low-voltage cabinet is during handling, if special messenger is responsible for unified command, the command signal that commanding issues It must be clear, accurate.

4) by assisting mobile tool or manpower transport, progress cabinet body is in place in numerical order, cabinet eye, hitch is delimited, with head Extend on the basis of the cabinet of face by propagation direction positioning and puts.

5) low-tension switch cabinet handling process wants fixed, to prevent unbalance stress cabinet body deformation or damage component.

6) battery pack is dismantled into other carrying before low-voltage capacitor box is carried, by the former mode of connection after capacitor box is fixed in place Take back battery pack.

7) the vertical adjustment of cabinet body group is adjusted between basis using 0.5~1mm compensation gasket, and every place's gasket at most cannot More than 3, bolt is equipped with using producer between each cabinet and is fastenedly connected.

8) monomer cabinet is in place fixed by basis, and welding grounding is carried out in accordance with regulations.

(2) cabinet body is fixedly mounted:

1) cabinet body fastening bolt is intact, and there is zinc-plated processing on fastening bolt surface；Fastening torque of bolt meets installation specification.

2) cabinet body is connected firmly with basic section steel, cabinet single side or in column install when be connected with securely, adjacent two cabinet top Portion's horizontal error < 2mm；Cabinet top portion horizontal error < 5mm in column；Vertical error < 1.5mm/m；Disk error: adjacent two cabinet side < 1mm, in column cabinet face < 5mm；Cabinet seam < 2mm.

3) cabinet body ground connection is solid and reliable, and every section of cabinet has each two o'clock in front and back or more to be obviously grounded, and conducting is good, weld length symbol Close related request.

4) mechanical latching, electric appliance block action are accurate and reliable, and the two-way contact movement of secondary circuit auxiliary switch is accurate, connect Touching is reliable.

5) it is connect reliably with multiply soft copper conducting wire with cabinet metal architecture equipped with the openable cabinet door of electric appliance, section > 6mm², The end of stranded conductor answers line tight, adds terminal attachment or wards off tin processing, must not be loose, stranded.

6) the connection interposer contact between cabinet body is good.

7) low-tension switch cabinet for being mounted on vibration place should take precautions against earthquakes, and it is anti-that 10mm is padded between cabinet and basic section steel Shake rubber mat.

8) flexibly, drawer is interchangeable, and after breaker open operation, insulating contact could be separated, drawer for the push-and-pull of drawer type low-voltage cabinet Secondary inserting piece, cabinet body between cabinet body contact, frame ground is good.

Bus installation:

1) without wedge angle, burr, any surface finish is smooth for hard bus and fixed device, including bending part should not have crackle, gauffer, Sundries and deformation and twisted phenomena.

2) the fixed hard bus faying surface of bolt is answered smooth, and silver coating should not have pitted skin, peeling and unmasked portion, plating Silver layer contact surface must not arbitrarily be ground.

3) it should be worn from lower to upper when bus horizontal through bolt, remaining situation lower nut should be placed in maintenance side, bolt length Preferably expose 2~3 screw thread of nut.

4) should there be washer through bolted two outside of bus, there should be the clear distance of 3mm or more between adjacent bolt washer, Answer shock mount washer locking nut in nut side.

5) smooth between bus bar fixing hardware and support insulator, it is bolt strained uniformly should to make the connecting terminal of electric appliance By extra-stress.

6) bus connects close, and connection bolt is fastened with torque spanner, and Tightening moment meets regulation (different size type Number low-tension switch cabinet torque presses prescribed requirement use).

7) when bus horizontal, bus supports the top hold-down of clamping plate that should keep the gap 1~1.5mm with bus, works as bus When vertically-arranged, top hold-down should keep the gap 1.5~2mm with bus, and alternate and distance to the ground should meet code requirement.

8) bus arranged up and down is arranged as A, B, C phase from top to bottom, horizontally disposed bus, from cabinet after arranged to cabinet face For A, B, C phase, the bus of downlead is arranged as A, B, C phase from left to right, and three-phase bus color is respectively the corresponding Huang of A, B, C Color, green, red, neutral bus rod (PEN) or ground connection+neutral conductor (PE+N).

9) visible part of the double-deck bus has phase colour code will, does not answer within the junction and junction 10mm of bus and electric appliance There are phase colour code will or phase colored paint.

Low-voltage switch equipment debugging:

1) it checks that the running part of operating mechanism is flexible, respectively connects bolt looseness.

2) after checking spring energy-storage, auxiliary switch cuts off motor power, and after combined floodgate, auxiliary switch is automatic Connect motor power.

3) relative position after disconnecting switch is closed a floodgate between contact is correct, contact is close, and the contact pressure of two sides is uniform, point Lock state, the clear distance of contact or pull open angle meet product technology requirement.

4) after switching-in spring energy storage, the lower end of draw bar or cam are reliably locked with each switch-on latching.

5) flexible movements of switching on and off blocking device, it is reliable, reset it is accurate, rapidly.

6) after mechanism closes a floodgate, it is reliably maintained at closing position, spring mechanism draft gear travel is adjusted, meets the technology of product Regulation.

7) mechanical latching, electric blocking movement are accurate and reliable.

8) check and adjust the integrality of five anti-device elements in cabinet, it is ensured that flexible operation is reliable.

Low-voltage bus bar positioning:

(1) horizontal bus positions:

1) according to length, the number of fragments of design drawing and field condition measurement bus, sectionalized busbar finished product is processed as required.

2) drawing is checked, confirmation bus model, specification, quantity and mating spare and accessory parts meet design requirement and and field device Match.

3) segmentation checks whether clear complete, the not damaged deformation of appearance of bus mark.

4) operation platform is built depending on the site environment, carries out bracket by the size measured in advance after design drawing and equipment positioning Positioning.

5) it is drawn lines and is positioned according to bracket, bus hoisting bracket is installed, bracket installs straight column pitch and presses design requirement, every unit Section is it is ensured that two hangers, are having jack box, threeway, elbow etc. to have bracket suspension bridge.

(2) vertical shaft bus positions.

1) the fixed bracket of vertical shaft bus keeps center in same axis.

2) the bus angle iron bracket of vertical shaft three sides are assembled to put on, all bolts are in the state of loosening, by channel steel and Spring, double threaded screw are connected on bracket, and spring is in the state that automatically resets.

3) lifting bus hoist engine must be installed steadily, and each pulley firmly installs.

4) terminal interface insulated screw should be removed when bus lifts, using bolt special, every section of bus bar terminal should put on guarantor Box is protected, in order to avoid terminal interface of damaging.

Low-voltage bus bar installation, equipment connection:

(1) horizontal bus is installed:

1) without wedge angle, burr, any surface finish is smooth for hard bus and fixed device, including bending part should not have crackle, gauffer, Field trash and deformation and twisted phenomena.

2) bus should carry out the installation wiring of cabinet face on side and low-voltage cabinet on the transformer by power supply to load side erection sequence Case, the fixed bus hanging portion of transformer connection case are more than that 400mm installs pull rod hanger additional, keep the verticality of bus.

3) above transformer and low-voltage cabinet or when two sides are constructed, transformer and low-voltage cabinet should be protected, prevents ash Dirt and brick are broken into cabinet body and damage transformer.

4) the installation landing stage of scaffold must be placed steadily, and sleeper should be tied up securely, must not use it is rotten, have obvious slight crack Sleeper.

5) bus cannot be lifted with wirerope or directly with cucurbit chaining when lifting using chain block, lifting must be used Band, must not stand below hoisting process wire casing people.

6) it is answered above transformer and low-voltage cabinet, when the installation bus of two sides using ladder

There is special messenger's support, it must not clashing and breaking device panel, instrument and operation button.

7) every section of bus must be qualified through live Insulation test before assembly, cleans end dust accumulation with hairbrush, balance crane is filled to Gantry position is fixed, and double bus lifting should carry out simultaneously.

8) every two sections of buses must be adjusted with horizontal ruler to sustained height, and end should ensure that insulation board, insulating film are complete when being inserted into Good lossless, insulated bolt should be straggly two-way to wearing, fasten up and down.

9) bus is completely embedded, and connection bolt is fastened with torque spanner, and Tightening moment meets following table such as and provides.

10) 12 galvanized steel bar of f or Double-colour horn wire reliable ground are used after bus installation, round steel bending must be grounded at fillet Bus interface protection is coped with when welding, prevents accidental injury bus shell spray coating.

(2) vertical shaft bus is installed:

1) it follows principle from bottom to top when installing, after Insulation test, bus port hairbrush is cleared up into dust accumulation；

2) bus to be installed is sling using special hoisting screw rod hoist engine or chain block slowly to transfer to the bracket of designated position It is fixed.

3) it checks bus verticality, be inserted into insulated bolt and fasten, compress gasket, check and loaded onto after each insulation insertion plate is errorless Angle bar frame and spring, double threaded screw are connected on bracket by connecting cover plate, and spring is in the state that automatically resets.

4) angle steel securely embeds in the fixed bracket of bus, and fastening double threaded screw locks upper extreme point nut, spring on angle steel Contract by distance is according to bus duct specification

5) nut for adjusting double threaded screw lower extreme point fastening angle steel, until the complete stretching bracket of angle steel, make bus left-right balance and Vertically, check all bolts fasten completely it is errorless after, slowly unclamp bus hoisting rope.

6) after a set of bus installs, it is necessary to be totally released the locking nut of spring upper end, to keep nargin.

Equipment connection:

1) it is connected between step down side leading-out terminal and hard bus using soft bus, it is soft between connection length about 30~50mm Two end terminal any surface finish of bus is smooth, silver coating is complete.

2) when soft bus is connect with appliance wiring terminal, appliance wiring terminal should not be made by applied stress.

3) soft bus must not have phenomena such as kink, loose stock, stranded or other obvious damages, corrosion, the thickness that is flexible coupling, quantity It must satisfy the overload electric current of transformer capacity.

4) after soft bus is connect with appliance wiring, exposed part should install insulating sheath and phase sequence mark color additional.

5) physical length docking hard bus is pressed between hard bus and low-voltage cabinet input terminal, connects standard and overcurrent amount symbol Close the related request of place capacity.

6) inlet wire port in low-voltage cabinet face must install anti-break iron case, and carrying out prevents toy from entering measure.

7) gantry ontology and each connecting portion of gantry must have reliable ground, and grounding body should meet design requirement.

Cable testing bridge installation

(1) installation site that the electric devices such as house lead in, box, case, cabinet are determined according to design drawing, (first does from beginning to terminal Branch line after line) horizontally or vertically line is found, with chalk line bag along wall, ceiling and ground etc., snap the line is carried out at the center of route, It is required according to design drawing and construction inspection rules provides, be uniformly distributed supporting point distance and mark specific location with pen.

(2) cable testing bridge should be installed on building, structures (such as wall, column beam, floor) as far as possible, close with Civil Specialities Cut distribution closes.

(3) height off the ground generally not preferably less than 2.5m when ladder or pellet type gantry (perforated tray) are horizontally mounted, (nothing Hole pallet) height off the ground can be reduced to 2.2m.

(4) when cable testing bridge multilayer is installed, in order to radiate and safeguard and prevent the needs of interference, gantry layer should there are certain Distance.

(5) several groups of cable testing bridges are parallel or when intersecting installation in sustained height, be considered as between each adjacent cable gantry maintenance, Overhaul distance.

(6) cable testing bridge is parallel with various pipelines when installing, and clear distance should meet relevant voltage class requirement.

(7) distance on cable bearer top layer and lowest level to ditch top, roof or bottom of trench, ground should meet design requirement.

(8) turning radius at cable testing bridge turning, cable minimum allowable bending radius no less than on the gantry Permissible value.

(9) bracket should be firmly installed with hanger installation, and guarantee is smooth vertical and horizontal, is there is slope

Mounting bracket and hanger should have the identical gradient with building on the building of degree.

(10) bracket is answered straight with steel used in hanger, and without obvious distortion, incision should be without crimping, burr.

Branch, hanger installation:

(1) snap the line positioning is carried out according to design drawing first along wall or top plate, marks the position of fixed point.

(2) according to bracket or the load of hanger load-bearing, corresponding swell fixture and drill bit are selected, the length of selected drill bit is answered Greater than swell fixture casing length.

(3) after the depth punched should be swell fixture casing length to be wholly embedded within the walls or in top plate, flush is Preferably.

(4) rubble in the hole completely accomplished fluently should be first removed, is driven in swell fixture in hole with iron hammer, to guarantee casing Concordant with building surface, bolt end is exposed, and when percussion must not damage the screw thread of bolt.

(5) corresponding washer can be mixed after bolt with nut by, which having buried, is directly anchored to bracket or hanger on swell fixture.

(6) first embedded iron is previously placed on concrete, then bracket or hanger is directly welded above or by I-shaped After steel column and embedded iron welding, just bracket or 97 hangers are mounted on joist steel upright.

The assembling of cable testing bridge and ground connection:

(1) there are bolt connecting hole in cable testing bridge straightway and curved logical side.When between the straightway of gantry, straightway with it is curved When needing to connect between logical, it can be attached with straight line connecting plate.When being connected between some gantry straightways also on the inside of side Use interior lining panel.

(2) pallet of two sections of different in width or height is connected, ladder is configurable to broaden and connecting plate or get higher plate.

(3) pallet, ladder branch, draw, draw lower place preferably and have it is appropriate curved logical.It is curved because being limited inconvenient installing by steric requirements When leading to or having particular/special requirement, hinge connecting plate and continuous articulated slab can be used.

(4) bolt of ladder (pallet) connecting plate should fasten, and nut should be located at the outside of ladder (pallet).

(5) when straightway steel cable bridge is more than that 30m, aluminium alloy or glass steel cable bridge are more than 15m, Ying You Expansion joint, connection, which preferably uses, is telescopically connected to plate；Cable testing bridge, which is crossed at building expansion joint, should be arranged expansion joint.

(6) gantry should have ground line to be connected to gantry junction, and branch (hanging) frame and branch (hanging) frame should have ground line to connect It is logical, have cable testing bridge system should and is reliably electrically connected and is grounded.

Cable laying:

According to cable length and section, the traction rope length of selection is 30~50m longer than cable.Traction rope connection must be securely.Its Tie point should select anti-twister.Cable sheave is laid, straight line pulley should be arranged every 2.5~3m in straight line portion, it is ensured that cable is not With ground friction, all pulleys necessarily are formed straight line.Bending part uses quarter block, and controls Cable Bending Radius and side pressure Power.Cable allows minimum bending radius that should meet following table regulation.Key position should have special messenger monitoring (as turning position, nozzle, with The position of other pipeline monitors).

When cable laying, it can be pulled with manpower or mechanical traction, cable should be drawn from the upper end of cable reel, cable should not be made On bracket and ground friction is dilatory.For heavier cable reel, it is considered as installing cable reel brake apparatus additional.When cable is walked about, Forbid to move cable and pulley with hand.

When cabling, mechanical cabling speed monitors lateral pressure and pulling force no more than fair no more than 15m/min Perhaps intensity.In cabling on more complex path, speed should suitably slow down.Cable maximum allowable traction when machinery laying Intensity is not preferably greater than following table numerical value.

The metal sheath or cable metal pipe of surface cable in electric railway or the bridge for thering is electric railway to pass through Road should insulate along the metal component of its overall length and metallic support or bridge.(14) after laying, sundries should be removed in time, covered Good cover board.When necessary, also by cover board gap sealing.Constructed tunnel, cable duct, vertical shaft, electric room entrance, nozzle into Row sealing.

Cable testing bridge system of laying:

Gantry cabling is constructed in addition to meeting general provision, it should also be noted that the following:

(1) cabling can use manpower or mechanical traction, see direct-buried cable mode of traction.

(2) when gantry horizontal laying, cable single-layered should be laid, marshalling.There must not be intersection, corner should be by cable Allow subject to bending radius.

(3) cable of different brackets voltage answers layer-built cables installation, and high-tension cable should be laid in top layer.

(4) when the cable of same step voltage is laid along gantry, cable net level length cannot be less than 35mm.

(5) cable laying marshalling, the cable of horizontal laying, head and the tail both ends, turning and are set two sides at 5~10m Fixed point.

(6) before vertical run, position, the good cable reel of frame are chosen, cable is bent downwardly position pulley support cable, Cable axis is nearby and part floor should be equipped with dynamic and non-skid feature；When laying, low layer should be first laid with O. cable, then lay height Layer.

(7) if you need to lay from bottom to top, low layer small bore cable can be laid with pulley rope manpower traction；High-rise big section Cable is preferably laid with mechanical traction.

(8) for the cable being laid in vertical gantry, every laying one should fix one, the fixed point of full-plastic cable For 1m, other cable fixed points are 1.5m.

It works before shrink cable termination connector fabrication and installation operation:

Cable seal is opened, insulation qualification is tested with 2500~5000V insulation resistance meter and is allowed for access next process.(make It should be executed by cable testing requirement with insulation resistance meter test insulation).

End is installed in charging operation region or in neighbouring charging zone, there should be reliable safety measure.

Before indoor cable head is installed, angle bar is supported by design requirement installation cable under corresponding cabinet disk or busbar and is grounded (such as cabinet disk has fixed point and the tie point of fixed point and cabinet apart from when installing end enough, can install cable without repetition Support angle bar).

Before electrical outdoor cable end is installed, cable anchor ear or gold are installed on the electric pole (tower) of installation end by design requirement Tool, cable anchor ear or fitting should have enough mechanical strengths, meet the bearing requirements of terminal and interim loading.Anchor ear or fitting And protection pipe is answered sturdy and durable, and is answered zinc-plated.(being proposed with hot dip Zinc material)

It aligns and cleans one section of end cable.Carry out rain-proof, dust prevention.

Stripping cable:

(1) after determining basic point, stripping outer jacket and armor are carried out by defined size.

(2) stripping liner layer and filler, by liner layer stripping to away from 5~10mm of armor cut-off part.

Installation ground line:

Braiding grounded copper wire on phase shielded layer and is bound securely respectively, is soldered on each phase copper strip shielding.For Ground line need to be tied up on steel armour with tinned wird and be welded again under capable draw with scolding tin by armored cable.It can be straight for armorless cable It connects under drawing ground line.

Wrapping filling glue:

Wrapped PVC band is distinguished on three grounding points of three-phase.Wrapped several layers of PVC bands on armouring binding ground wire point, packet to liner Layer simultaneously all covers laying, and in the outside of first layer adhesive waterproof tape further around packet second layer adhesive waterproof tape, earthing clamp exists Centre, to prevent water or moisture from penetrating into along ground line gap.Shape is neatly in apple form.

Trident gloves are installed:

(1) after the three core branches used being covered outer cleaning, it is put into threephase cable crotch, first extracts lower end Inner plastic spiral bar out (taking out counterclockwise) then extracts three plastic spiral items referred to inside pipe out again, shrinks and compress in threephase cable crotch.

(2) cable is fixed on bracket, Check Phase Sequence, then measures three-phase respectively to the about position of equipment wiring hole It sets, at the position about 50mm for growing any away from wiring hole, cuts off extra core.

Insulating sleeve is installed:

Three cold events insulating sleeves are respectively fitted on three-phase electricity cable core, lower part covering branch set refers to pipe 15mm, extraction insulation Plastic spiral item (taking out counterclockwise) in casing is pressed on insulating sleeve contraction on three-phase electricity cable core.It is exhausted if necessary to spreading Edge casing can shrink second cold events insulating sleeve with same method, and the lower end of second casing is taken with first casing 15mm is met, the length on insulating sleeve top to core end should be equal to size as defined in instruction for mounting.

Stripping metal screen layer, semiconductive, insulating layer:

(1) copper shield is stripped by size as defined in instruction for mounting, semi-conductive layer, insulating layer must not be injured when stripping.

(2) semi-conductive layer is stripped by size as defined in instruction for mounting, insulating layer must not be injured when stripping.

(3) remain in the semi-conductive layer of major insulation appearance, it is necessary to be polished with crosus cloth clean, and be grounded from high pressure part is past The unidirectional erasing in direction must not be carried out back and forth, avoid a conductive powder band to high potential.

(4) with the gap of semi-conductive tape filling semi-conductive layer and major insulation, it is necessary to seamlessly transit.It is opened among semi-conductive layer Begin wrapped from glutinous 1~2 layer of band, wrapped semi-conductive tape and from when sticking band in a manner of half-lap upwards, will be first stretched to it Originally the 1/2 of width, then carry out wrapped.

(5) cable is fixed on and is supported on angle bar or cabinet disk fixed point.

(6) core and equipment contact lengths are determined, adds 5mm by end insulation by terminal hole depth using machining tools It strips, conductor cannot be scratched in stripping, end is whittled into pencil stub (chamfering) shape.

Crimp connecting terminal:

(1) verification terminal sizes and cable conductor size select the connecting terminal in adaptation section, remove core and terminal inner wall oil Dirty and oxide layer.Connecting terminal answers smooth and not additional stress just to be crimped with the faying surface of contact.

(2) connecting terminal crimping sequence should be crimped gradually from top to bottom, per pass impression spacing and should be accorded at a distance from end Close the regulation of following table.

(3) at crimping position, the side that confining pressure is formed should in one plane, and the load mould center line pressed should be straight at one Line.The overall width in conductor crimping face, it may be that crimp 2.75~5.5 times of thickness of pipe wall.

(4) it after pressing mold closes up in place, could loosen the mold after 10~15s should be stopped, so that crimping position metal plastic deformation Reach basicly stable.There must be enough mechanical strengths after the completion of connecting terminal crimping.

(5) after crimping, with the corner angle and burr of file and emery cloth removal connecting terminal surface.The load mould depth pressed should be with The pressing part height of formpiston is consistent, and flat flawless is answered at hole bottom.After pressing, load mould should be tamped.

(6) connecting terminal surface is cleaned with (cleaning cloth) solvent.

Cold events insulating part is installed:

(1) cleaning line core insulation will wear dedicated hand when the semi-conductive tape of wrapping and neighbouring insulating surface apply silicone grease, apply silicone grease Set.And unidirectionally smeared from high pressure part toward ground connection direction, it must not back and forth carry out, avoid a semi-conductive tape conductive powder band to high electricity Position.

(2) it is inserted in cold events insulating part to the position of defined (instruction for mounting is operated).

Lapped insulation band:

(1) with the gap between electro-insulating rubber band wrapping connecting terminal and core insulation, outside is further around packet high temperature resistant, arc resistant Insulating tape.

(2) in three-phase electricity cable core branch, set refers to pipe outer wrap phase color colored belt.

(3) pressure test is carried out to cable, review phase is correct after qualification, and end is connect with equipment by phase sequence, is connect Ground wire reliable ground.

(4) connection of cable termination and electric device should meet 149-1990 " electric device of existing national standards GBJ The construction of installing engineering bus device and acceptance specification " regulation execution.

Cold contract cable middle joint fabrication and installation:

Cable centre point location strips cable sheath:

(1) straightening cable；Be laid flat after cable is stayed appropriate remaining, in the 2m of cable end to be connected respectively straightening, dry Only, overlapped 200mm makees Center Line Marking at middle part, as connector center.

(2) after determining central point, stripping outer jacket and armor are carried out by defined size.It stripping liner layer and fills out Material.

(3) match line core, it is sawed-off at core center.

Stripping metal screen layer, semiconductive, insulating layer:

By defined size from central point to both ends core wire stripping copper strip shielding layer, measured from shielded layer fracture by defined size Semiconductor layer, remaining is peelled off.Insulator is peelled off by defined size.End is whittled into pencil head, remove insulating surface carbon mark and Conductive surface oxide, is polished with crosus cloth, and from high pressure part toward the ground connection unidirectional erasing in direction, not carried out back and forth, be avoided Conductive powder band to high potential.

Set insulating cold collapsible tube: copper mesh is inserted on core respectively.Insulating cold collapsible tube is inserted in stripping cable again On the core of longer one end.

Conductor connection:

(1) wiring pipe size and cable conductor size should be checked before crimping, selects the wire barrel in adaptation section, remove core and end Sub- inner wall greasy dirt and oxide layer, are crimped.

(2) wire barrel crimping sequence should be crimped gradually from the inside to the outside, per pass impression spacing and should be met at a distance from end The regulation of following table.

(3) at crimping position, the side that confining pressure is formed should in one plane, and the load mould center line pressed should be straight at one Line.The overall width in conductor crimping face, it may be that crimp 2.75~5.5 times of thickness of pipe wall.

(4) it after pressing mold closes up in place, could loosen the mold after 10~15s should be stopped, so that crimping position metal plastic deformation Reach basicly stable.There must be enough mechanical strengths after the completion of wire barrel crimping.

(5) after crimping, with the corner angle and burr of file and emery cloth removal connecting terminal surface.The load mould depth pressed should be with The pressing part height of formpiston is consistent, and flat flawless is answered at hole bottom.Connector should tamp load mould, and cover gold using when pressing Belong to shielding, to eliminate the influence for answering load mould to cause electric field distortion.

(6) wiring pipe surface is cleaned with (cleaning cloth) solvent.

Cold events adapter body is installed:

Intermixture is uniformly smeared in wiring pipe surface, semi-conductive layer and insulation intersection and insulating surface, is wanted when smearing intermixture Wear special gloves.Cold events adapter body is packed into from the longer end cable of stripping length.Plastic spiral item is taken out, cooling receipts are made Contracting adapter body is shunk.It is directed at semi-conductive adhesive band when installation, pays attention to must assure that accurate positioning.Keep the center of adapter body lucky It is located in the center of conductor crimping pipe, otherwise, cold events adapter body should be twitched as early as possible to be adjusted.

Restore metallic shield:

(1) three-core cable is bound together with PVC band；Wrapped one layer of adhesive waterproof tape, coats adhesive for cable bedding layer.

(2) installation armouring braiding ground line.Water-proofing treatment is done in the range of braiding is grounded both ends 80mm；It is pricked with copper One end of litzendraht wire is fixed on steel armouring, and is welded with scolding tin by line.Half overlapping sticks rubber insulation tape for copper around double-baging certainly Binding covers together with armouring.

(3) it is partly overlapped with adhesive waterproof tape wrapped to both ends restrictive coating.

Oversheath band is installed:

(1) recess on both sides is filled and led up with adhesive waterproof tape.

(2) both ends are partly overlapped wrapped armoring tape back and forth outside connector.

(3) after connector installs, cable should be put back on the bracket of the cable laying, the lower section of connector should put non-conductive hard Material plate support, connector both ends are fixed on bracket with binding.

Grounded screen installation, grounding body connection:

(1) grounding body connection should be reliable, and in addition to the cut-off point of design code can be connected with, crimp, remaining applies welding side Formula connection, material are matched with grounding body.

(2) grounding body, which is welded to connect position, should do preservative treatment.

Grounding body is embedded:

(1) grounding body laying is preferably synchronous with foundation construction carries out.

(2) following provisions should be met by laying vertical, horizontal grounding objects:

1) the inclination preferably contour wire routing of landform is met.

2) parallel distance should meet design requirement between Grounding Grids and horizontal grounding objects.Grounding Grids spacing is unsuitable small In 2 times of its length.5m is not preferably less than when no design code.

3) grounding body laying is answered straight.

4) it to the extreme terrain for being unable to reach above-mentioned requirements, should resolve through consultation with designer.

5) when nearby having power circuit, it should be understood that the grounding body of former route moves towards, and avoids the grounding body phase between two routes Even.

6) when ground connection laying, underground cable and other facilities should be avoided.

(3) Grounding Grids should be squeezed into vertically, and prevent from shaking.Grounding Grids are being reached the last, and should find out subterranean designation Situation.

(4) grounding body built-in length, depth should meet design requirement.When designing no standard, Grounding Grids length is not Preferably less than 2.5m, the grounding body top surface depth of burying are not preferably less than 0.6m.

(5) it in mordant soil layer, should construct by design requirement.When designing no standard, copper rod or copper bar are preferably used Laying.

Ground line installation:

(1) ground line should contact well with the connection of shaft tower, should be convinced in basis and protective cap.

(2) ground line orientation is corresponding with steel tower ground connection hole site.Expose earth's surface position and answers straight beauty.

(3) concrete frame ground line should make insulation protection against shaft, and should fix at a certain distance with shaft.

Ground resistance measurement:

(1) after grounding body backfill, certain interval of time is answered to carry out the test of industrial frequency electric resistance, the value measured is multiplied by seasonal factors Afterwards, it should not exceed design code value.

(2) when measurement of Grounding Resistance, downlead and shaft tower must be disconnected, and should be avoided and measure in rain and snow.

Electrical test scheme

Transformer test

(1) first and second winding D.C. resistance of transformer；The winding that 1600kVA and following capacitance grade Three-Phase Transformer are measured The alternate mutual difference of D.C. resistance is less than the 4% of three-phase average value, and mutually difference is less than the 2% of three-phase average value between line；1600kVA The alternate mutual difference of the winding D.C. resistance that the above capacitance grade Three-Phase Transformer is measured is less than the 2% of three-phase average value, between line Mutual difference is less than the 1% of three-phase average value；Measuring transformer winding D.C. resistance should by the tap of operation last into Row test.

(2) transformer has neutral point to draw, and measures the D.C. resistance of each phase winding, draws without neutral point, measurement D.C. resistance between winding wire.

(3) transformer winding direct current resistance m easurem ent should be tested on all positions of each tap.

(4) transformer winding voltage ratio；The data of transformer winding voltage ratio are tested out compared with builder's name plate data ± 0.5% should be less than without the winding voltage ratio error that significant difference, specified tap are measured, the voltage ratio of other taps is answered Within the 1/10 of transformer impedance drop value but it must not exceed ± 1%.

(5) when measuring transformer winding voltage ratio, the stabilization of supply voltage should be kept, reduces the deviation of reading.

(6) transformer winding voltage should be tested than measurement on all positions of each tap.

(7) the three-phase wiring group of transformer；The three-phase wiring group of transformer must be with the label symbol phase on nameplate Symbol.

(8) transformer core insulation resistance；The ground connection of iron core and shell is unlocked in flakes, iron core is necessary for one point earth； It is measured using 2500V insulation resistance meter, duration 1min should be without flashover and punch-through.

(9) during the measurement of transformer winding insulation resistance and winding ac voltage withstanding are tested, subject winding answers three-phase to be shorted, non- The winding three-phase of subject is shorted and is grounded, and should be discharged subject winding, is grounded after test every time.

(10) transformer winding insulation resistance；Transformer winding insulating resistance value is not less than the 70% of delivery test value；Transformation Device winding ac voltage withstanding test front and back should all measure insulation resistance, and the insulating resistance value that front and back measures is apparent compared to should less have It reduces；Manual insulation resistance meter, which shakes rated speed, can just connect subject winding, and measurement finishes, and first cut high-voltage line, then stop Only shake insulation resistance meter.

(11) transformer winding ac voltage withstanding is tested；Dry-type transformer ac voltage withstanding test voltage, high-pressure side is by voltage etc. Grade requires standard to press；Oil-immersed transformer ac voltage withstanding test voltage, high-pressure side is pressed to press by voltage class standard.It is testing During boosting, anyone must not cross cover bar, if special messenger guard, ac voltage withstanding test high-voltage leading-out wire should support it is solid and reliable, And there are enough safe distances.Before pressurization, it is necessary to conscientious checkout facility wiring, the beginning state of pressure regulator zero-bit and instrument, Correctly, it checks whether all personnel meets the required distance of high-potting voltage, takes and the mode for singing response is exhaled to be grasped Make, boost process, the instruction of instrument, instrument should be observed, personnel's dynamic monitors transformer either with or without abnormal phenomenon, according to these Phenomenon judges；Each applied voltage test is complete to be first down to zero-bit, open test power supply, to subject winding and testing transformer for voltage High-pressure section electric discharge, ground connection；It is big such as to occur voltmeter beat of pointer amplitude in boost process, ammeter instruction sharply increases, and becomes It when depressor has abnormal phenomenon, should be depressured immediately, cut off experiment power supply, carry out safety measure and checked, according to inspection situation Determine test or termination test again.

(12) insulating oil short form test；Insulating oil appearance transparent, without mechanical admixture or suspended matter, acid value≤0.03mgKOH/ G, water soluble acid pH value > 5.4, flash-point are not less than 140 DEG C, breakdown voltage >=35kV, moisture≤20mg/L insulating oil test class The regulation of the 20.0.2 articles of GB 50150-2006 " Erection works of electrical installations Standard for handover test of electric equipment " should not met, The pilot project and standard of insulating oil should meet " the electric device installing engineering electrical equipment commissioning test mark of GB 50150-2006 It is quasi- " the 20.0.1 articles of regulation.

Switchgear test:

Circuit-breaker testing:

(1) the galvanic circle resistance of breaker；Test result should meet product technology condition regulation.

(2) mechanical property of breaker is tested；The synchronism of the switching on and off of breaker is measured, contact when measurement is closed a floodgate Bounce time；Test result should meet the regulation of product technology condition.

(3) insulation resistance of breaker；Measure that breaker is alternate, insulation resistance relatively；Insulating resistance value is referring to system Make the regulation of factory.

(4) breaker ac voltage withstanding is tested；Test front and back should measure insulation resistance, the insulating resistance value phase that front and back is measured Than should less be substantially reduced；The ac voltage withstanding test of breaker relatively and when separating brake carries out between fracture when closing a floodgate；Test Voltage should be by regulatory requirements.

(5) during measuring insulation resistance and ac voltage withstanding test, if special messenger guards, personnel is forbidden to enter test scope With touching breaker and testing equipment, test operator is such as sent out it is noted that the instruction situation of instrument and the situation of breaker Existing voltage change amplitude is very big, and electric current sharply increases, and breaker has abnormal phenomenon, should be depressured, cut off the power immediately, stops examination It tests, ascertain the reason and is tested again after handling.

(6) it after completing measurement insulation resistance and ac voltage withstanding test, is both needed to discharge to breaker with discharging rod.

Voltage transformer test:

(1) D.C. resistance of first and second winding of voltage transformer；The voltage transformer winding D.C. resistance of same model, same specification There should not be larger difference, first winding DC resistance differs compared with factory-said value is not preferably greater than 10%, the direct current of secondary winding Resistance value differs compared with factory-said value is not preferably greater than 15%.

(2) voltage transformer excitation property；The exciting current that voltage rating measurement point is measured not preferably greater than its factory examination Test the 30% of the measured value of report and type-test report, same to batch, same to model, same specification voltage transformer in voltage rating The exciting current of point should not differ 30%；Under normal circumstances, excitation curve measurement point is 20%, 50%, 80%, the 100% of voltage rating With 120%.

(3) error measure of voltage transformer；Voltage transformer for metering must carry out error measure, and be missed The mechanism of difference detection must be the legal metering validation activity of country's authorization.

(4) insulation resistance of voltage transformer winding；Voltage transformer first winding to secondary winding and shell, it is secondary around Group is to the insulating resistance value of shell not preferably less than 1000MW；The measurement insulation of ac voltage withstanding test front and back is carried out to voltage transformer Resistance, the insulating resistance value that front and back is measured are compared and should be less substantially reduced.

(5) the ac voltage withstanding test of voltage transformer；Test of the voltage transformer first winding to secondary winding and shell Voltage presses regulatory requirements, and secondary winding is 2kV to the test voltage of shell；Complete measurement insulation resistance and ac voltage withstanding test Afterwards, it must be discharged with discharging rod voltage transformer.

(6) during the excitation property, measurement insulation resistance and ac voltage withstanding test that measure voltage transformer, if special messenger Monitoring forbids personnel to enter test scope and touching voltage transformer；Test operator it is noted that instrument instruction situation with And the situation of voltage transformer, the test such as discovery voltage change amplitude of ac voltage withstanding is very big, and electric current sharply increases, mutual induction of voltage Device has abnormal phenomenon, should be depressured, cut off the power immediately, stops test, ascertains the reason and tested again after handling.

Current transformer test:

(1) error measure of current transformer；Current transformer for metering must carry out error measure, and carry out error inspection The mechanism of survey must be the legal metering validation activity of country's authorization.

(2) insulation resistance of current transformer winding；Current transformer first winding to secondary winding and shell, it is secondary around Group is to the insulating resistance value of shell not preferably less than 1000MW；The measurement insulation of ac voltage withstanding test front and back is carried out to current transformer Resistance, the insulating resistance value that front and back is measured are compared and should be less substantially reduced.

(3) the ac voltage withstanding test of current transformer；Test of the current transformer first winding to secondary winding and shell Voltage presses regulatory requirements, and secondary winding is 2kV to the test voltage of shell.

(4) during the insulation resistance of measurement current transform er and ac voltage withstanding are tested, if special messenger nurses, forbid personnel Into test scope and touching current transformer；Test operator it is noted that instrument instruction situation and current transformer The test such as discovery voltage change amplitude of situation, ac voltage withstanding is very big, and electric current sharply increases, and current transformer has abnormal phenomenon, It should be depressured, cut off the power immediately, stop test, ascertain the reason and tested again after handling.

(5) after completing measurement insulation resistance and ac voltage withstanding test, current transformer must be put with discharging rod Electricity.

The bulk testing of switchgear:

(1) ac voltage withstanding is tested；It, can be together with equipment in cabinet, including voltage transformer, Current Mutual Inductance for permutation switchgear Device, breaker, disconnecting switch, bus etc., but arrester must be kept apart, ac voltage withstanding testing standard should setting using connection Minimum test voltage value is that standard is pressurizeed in standby；The test of full loop ac voltage withstanding answers a phase to pressurize, remaining two phase ground, Pressurization front and back measures insulation resistance, and the insulating resistance value that front and back is measured is compared and should be less substantially reduced；Manual insulation resistance Table, which shakes rated speed, can just connect tested device, and measurement finishes, and first cut high-voltage line, then stop shaking insulation resistance meter.

(2) during testing boosting, anyone must not cross cover bar, if special messenger guards, ac voltage withstanding is tested high pressure and drawn Line should be supported solid and reliable, and have enough safe insulation distances.Before pressurization, it is necessary to conscientious checkout facility wiring, pressure regulator zero The beginning state of position and instrument correctly checks whether all personnel meets the required distance of high-potting voltage, takes The mode for singing response is exhaled to be operated, boost process should observe the instruction of instrument, monitor the equipment of permutation cabinet either with or without abnormal existing As, being judged according to these phenomenons, each applied voltage test is complete or voltage is first down to zero-bit by change wiring, open test power supply, To tested device and the electric discharge of testing transformer high-pressure section, ground connection；It is big such as to occur voltmeter beat of pointer amplitude in boost process, Ammeter instruction sharply increases, and equipment has abnormal phenomenon, should be depressured immediately, cuts off experiment power supply, carries out safety measure and carry out It checks, test or termination test again is determined according to inspection situation.

Test of lightning arrester

Power cable test

Wireline test:

(1) check the phase of cable ends: the correspondence phase phase of cable ends should be consistent.

(2) insulation resistance of cable: answer it is each it is alternate, relatively and metallic shield interlayer measurement；Pressure-resistant front and back should all measure The insulation resistance of the insulation resistance of cable, front and back should be without significant change.

(3) it DC break down voltage test and leakage current testing: is carried out in each phase respectively, when to a phase study, other two Phase, shielded layer, armor are grounded together；Test voltage can divide 4 sections of uniformly boosting, every section of stop 1min, and read leakage current, 15min is maintained after rising to test voltage value, reads leakage current when 1min and 15min.

(4) during testing insulation resistance, DC break down voltage test progress, personnel is forbidden to enter trial stretch and touching just In the cable of test；If special messenger guard, DC break down voltage test high-voltage leading-out wire should support securely, and have enough safe insulations away from From.Before pressurization, it is necessary to which conscientious checkout facility wiring, the beginning state of pressure regulator zero-bit and instrument correctly notify related Personnel leave subject cable, including cable two sides, and the other side for being tested cable also answers someone to nurse, and take and exhale the mode for singing response It is operated, boost process, the instruction of instrument should be observed, monitor the situation of cable, judged according to phenomenon, each applied voltage test Voltage is first down to zero-bit, open test power supply, to subject cable phase and testing transformer high-pressure section by complete or change phase connection Electric discharge, ground connection；It is big such as to occur voltmeter beat of pointer amplitude in boost process, ammeter instruction sharply increases, and has flashover, hits It wears, insulator fever phenomena such as smoldering, should be depressured immediately, open test power supply, to subject cable phase and testing transformer high pressure Partial discharge, ground connection are checked depending on phenomenon situation, and test is tested again or stopped in judgement.

Grounded screen test

Commissioning of Relay Protection

Secondary circuit Insulation Test:

(1) using 1000V insulation resistance meter measurement secondary circuit insulation resistance when, small bus disconnects every other parallel branch When, no less than 10MW；The each branch and breaker of secondary circuit, the electric power loop of operating mechanism of disconnecting switch etc., No less than 1MW can be not less than 0.5MW in moister place.

(2) terminal of all electric currents, voltage, DC loop is linked together at the terminal block of protection, and will be electric Stream, voltage circuit grounding point dismantle, with 1000V insulation resistance meter measurement insulation resistance over the ground, insulation resistance be should be greater than 2MW。

(3) to signal circuit, with the 1000V insulation resistance meter measurement every core of cable over the ground and to the insulated electro between other each cores Resistance, insulation are not less than 2MW.

(4) circuit and cable introduced outside will be all at the terminal block of protection is all off, respectively by electric current, electricity Pressure, DC control, signal circuit all terminals each be attached to together, and the grounding point of electric current, voltage circuit is dismantled, is used The insulation resistance of 1000V insulation resistance meter measurement to each circuit and over the ground, insulation resistance should be greater than 10MW.

(5) the device circuit for nominal insulation voltage more than or equal to 60V should use 500V insulation resistance meter, and insulate Resistance is not less than 10MW.

(6) secondary circuit has electronic component, should extract plug-in unit before test, or positive and negative anodes are reliably shorted (light Except coupling and power insert).Must not should be noted that when plug part and damage plug-in unit, rises to pull out and need the having to using dedicated of specific purpose tool Tool.

(7) when measurement insulation, it is necessary to equipment under test and various aspects are disconnected, identification no-voltage, the unmanned work of certain equipment, Can carry out.Forbid other people proximity devices in measurement process.

(8) measurement insulation front and back, it is necessary to which equipment is discharged over the ground.

(9) after being measured, restoring plug-in unit should be noted that the direction of insertion of plug-in unit, should examine nothing through the second people after being inserted into plug-in unit Accidentally, subsequent energization checking procedure can be carried out.

Voltage, current transformer test:

(1) check whether current transformer nameplate parameter is complete, and no-load voltage ratio, capacity, standard class are consistent with design requirement.

(2) when measuring the insulation resistance of mutual inductor secondary winding, it should use 2500V insulation resistance meter will be each secondary right respectively It is measured respectively between shell and secondary winding.

(3) exciting characteristic curve for surveying and drawing current transformer, should generally measure saturation point or more, to Multiple coil Current Mutual Inductance Device should be analyzed the precision grade for checking each winding by curve obtained, to examine whether distribution of each winding for instrument, protection closes Reason.

(4) verify the polarity of current transformer, whether the polarity mark checked on nameplate correct, check each time of mutual inductor around Whether the connection type and its polar relationship of group are consistent with design, and whether separate mark is correct；For being protected equipped with such as circuit longitudinal Shield, requires polarity, and it is consistent with the current transformer polarity that route opposite side is installed that the polarity of current transformer is had to.

(5) as a result the no-load voltage ratio for verifying current transformer answers the no-load voltage ratio that should examine each tap respectively for having multi-tap It is consistent with nameplate and design requirement.

(6) it is passed through the secondary burden of amperometric determination from secondary wiring of current mutual inductor position to entire circuit, presses surveyed excitation Whether tracing analysis current transformer meets 10% error curve.

(7) polarity of calibration potential transformator needs secondary voltage arranged side by side for there is the wiring of two groups of voltage transformers , it has to guarantee that the polarity of two groups of voltage transformers is completely the same.

(8) as a result the no-load voltage ratio of calibration potential transformator should be consistent with nameplate and design requirement.

(9) to the secondary circuit using the voltage transformer for putting electrical grounding, the correctness and electric discharge of its wiring need to be checked The power-frequency sparkover voltage of gas.When generally using 1000V insulation resistance meter, discharge tube should not puncture, and with 2500V insulation resistance meter When, it should reliably puncture that site operation responsible person is correct, safely organizes operation, site operation matter peace person is responsible for the full mistake of field operation The safety, quality of journey monitors.

Secondary circuit inspection:

Electric current secondary loop is forbidden opening a way, and voltage secondary circuit forbids short circuit.

Relay, protective device debugging:

(1) microcomputer protective relay device is used, answers check device appearance without serious dust, it is not damaged；Connection sheet, handle, button Deng installation should rectify, securely, contact is good.It is reliable to adjust small switch, thumbwheel switch, microswitch flexible operation, switching position It sets obviously, contact is good.

(2) it in the case where disconnecting installation's power source, extracts each plug-in unit and is checked, the marked Power Level of plug-in unit is handed over Flowing secondary rated value should be consistent with design, and printing plate answers appearance normal, no rosin joint, the abnormal phenomenon such as discharge off burn marks.

(3) restore insertion plug-in unit and examine it is errorless after, put into installation's power source, change power supply DC voltage 80%~110% In range, device can be worked normally, and sudden shut off, closed external input power, inverter and Microcomputer Protection also should be able to be just Often work, does not malfunction.

(4) recovery device normal power source runs 1min or more, the drift of each of ac of check device (electric current, voltage) Value, error should be not more than 2%.

(5) apply 50%, 100%, the 150% of of ac (electric current, voltage) rated value respectively, check measurement, protection sampling Value, precision should meet 5% error requirements.

(6) corresponding design drawing check device it is each open into, output situation, device can correct response.Such as: it examines respectively The signals such as adjusting puts into/exit the tripping of transformer gas, overtemperature trips, high temperature transmits are tested, simulation gas acts, overtemperature acts, High temperature movement, device should be able to correctly correspond to tripping starting accident signal (electric whistle) after receiving signal or starting transmits (electric bell).

(7) the various various defencive functions of fault condition check device are simulated, when 1.05~1.1 times that actuating quantity is setting valve When (reflecting that certification condition acted) or 0.9~0.95 times (reflecting low certification condition movement), each protection element answers action message. It checks and (reflected low definite value when 0.9~0.95 times (reflecting that certification condition acts) that actuating quantity is setting valve or 1.05~1.1 times If action) when, each protection element should reliably be failure to actuate.

(8) be added setting valve 1.2 times (reflected certification condition act) or 0.8 times (reflecting low certification condition movement) Actuating quantity, measuring actuation time with respect to setting time error should not exceed 5%.

(9) relay protection is used, should check whether live relay setting range meets definite value requirement, and should be by definite value Change coil string simultaneously connects mode.

(10) external inspection is carried out to relay, should checks relay1 case cleaning, free from dust, shell is answered in conjunction with pedestal Close and firm, dust seal is good, and the terminal connections of relay are answered solid and reliable.

(11) relay inside and mechanical part, should check free from dust inside confirmation relay, and pivotable parts should act Flexibly, the installation of each component is intact, and screw should be tightened, and plumb joint is answered solid and reliable, and spring is without deformation, when spring is turned by initial position When to maximum scale, interfloor distance will uniformly, and spring plane wants vertical with shaft, and the fixation of contact will securely have no injured and burning Damage.

(12) when wiping and repairing contact, forbid the device coarse with sand paper etc., burn place and can be repaired with fine oil stone and is used in combination Silk is wiped clear；The axis and bearing of relay are forbidden injecting any lubricant.

(13) single relay is in new installation or after Disintegration overhaul, using 1000V insulation resistance meter (voltage rating Coil insulation resistance is measured for 100V or more) or 500V insulation resistance meter (voltage rating is 100V or less)；Whole terminals are the bottom of to The insulation resistance of seat and magnetic conductor is not less than 50MW, and each coil is not less than 50MW to the insulation resistance between electric shock and each contact, respectively Insulation resistance between coil should be not less than 10MW.

(14) insulation resistance is measured to replace ac voltage withstanding to test with 2500V insulation resistance meter, surveyed insulation resistance should not Less than 20MW.

(15) electric current, voltage relay scale are examined, should checks relay minimum, maximum and mid-scale and adjusting It is worth the movement and return value of scale.

(16) error of relay setting point and setting valve is not to be exceeded 3%.

(17) overcurrent is examined, the drop-off to pick-up radio of over voltage relay is no less than 0.85 and is also not greater than 0.95, low electricity Potential relay is not more than 1.2.

(18) it is without friction should to meet relay contact under rated voltage for the contact of inspection voltage relay；Low-voltage after For electric appliance when dropping to operation voltage and zero from voltage rating, without friction and unfirmly closing phenomenon is answered in contact；Over voltage relay with When 1.05 times of operation voltages and 1.1 times of surge voltage, without friction and unfirmly closing phenomenon is answered in contact.

(19) electric current relay when with 1.05 times of action currents and protection installation place maximum fault current impact, answer by contact Without friction and unfirmly closing phenomenon.

(20) initial angle and end angle for changing tongue piece can be used in the drop-off to pick-up radio for adjusting relay；Change tongue piece both ends Bending degree；The methods such as appropriate adjustment contact force.

(21) action value for adjusting relay, which can be used, adjusts the start bit of tongue piece in the maximum scale position of relay It sets；Spring is adjusted in relay minimum scale position；The methods of adjustment contact force appropriate.

(22) for being vibrated close to adjusting point the reason of has: stationary contact elastic slice is too hard, too thick elasticity is uneven；Stationary contact Elastic slice bending is incorrect；Contact carriage swing angle is too big；Contact phase angle improper (generally 55 °~65 °) etc., so adjustment Relay vibration can suitably be corrected for above situation.

(23) inspection of signal relay should be noted that current mode action value no more than 0.9 times of rated value, voltage-type action value It should not exceed 0.7 times of rated value.

(24) operation voltage of review time and intermediate relay should not exceed 70%, and return value is not less than 5%, time relay The actuation time of device should meet all kinds of models inspections or specification error requirements, and the error for surveying actuation time and setting time must not Greater than the 10% of setting time.

Total group test, primary current and operating voltage are examined:

(1) method of total group test, i.e., the simulated failure amount being consistent in addition to thering is electric current and voltage terminal to be passed through with fault condition with Outside, protective device (or relay) should be at and put into operation identical state, and check protection circuit and setting valve are just True property.

(2) by fixed value list requirement put into electric quantity protective, terminal block position be passed through electric current, voltage (apply voltage should carry out Prevent the measure of the reverse charge primary to voltage transformer), various failures are simulated, protective device (or relay) should be able to correctly go out Mouthful movement, breaker should be able to correctly correspond to tripping, and (including relay falls board instruction, alarm window, predicts sound for related light, sound signal Loud and accident signal etc.) it should be able to correctly act, it throws and moves back function or outlet connection sheet, check that connection sheet setting should be correctly (when normal Output clamping upper prop is negative voltage, and lower prop is no-voltage).

(3) non-ionizing energy loss is put by fixed value list requirement, simulates the signals such as gas, overtemperature, high temperature in position resolver, protects Protection unit (or relay) correctly should be able to be acted or be transmitted by design requirement, and breaker should be able to correctly trip, related light, sound signal (including relay falls board instruction, alarm window, advance notice sound equipment and accident signal etc.) should be able to correctly act.

(4) having mostly for design back into line and has prepared auto restart, chain function, presses design requirement, simulation side inlet wire mistake Pressure tripping, other side should be able to automatic closing investment, and should check the electrical interlocks between main power supply and backup power source, strictly Prevent dual power supply paired running.

It (5), should be able to correct chain tripping incoming switch when checking that metering disconnecting switch pulls open (or measuring trolley pull-out).

(6) relaying configuration has pilot protection should also carry out joint debugging with route opposite side, simulates various fault condition two sides protections Correctly outlet movement or latch-up protection movement, inspection result it should should all meet adjusting and design requirement.

(7) the whole group examination of protective device is not allowed to be carried out with card relay contact, short circuit contact or similar artificial means It tests.

(8) operating voltage is added in voltage secondary circuit, checks that fuse, Quick air switch on and off circuit should be correct, Circuit phase sequence should be correct, and device, which samples, to be corresponded to correctly, checks that voltage circuit switches handle, voltage measuring instrument, which should be shown, to be corresponded to just Really；It should be noted that inspection secondary circuit and primary side disconnect before applying secondary voltage, prevent voltage from being powered from secondary to primary side is counter. It is certain it is noted that answering unmanned work on circuit in pressure process.

(9) current transformer primary side is passed through galvanoscopy current loop correctness and integrality, and should be noted that short circuit group Not, to ensure that each group of other wiring and no-load voltage ratio are correct；Pay attention to checking that confirmation panel ammeter shows and is passed through primary current phase Symbol.

(10) before zero sequence current mutual inductor once flows up, pay attention to checking whether a cable shield ground line meets specification and want It asks.

(11) it is once flowed up by zero-sequence current definite value, protective device or relay should be able to correctly export tripping；To having Double zero sequence current mutual inductors, it should also be noted that changing the direction of threading, checks the installation polarity of zero sequence current mutual inductor, as a result answer Meet design requirement.

(12) TV second short circuit, TA second open circuit should strictly be prevented during testing.

Debug power transmission scheme, electrical equipment Adjustment Tests, electrical equipment monomer assays:

1) it is passed through voltage and current signal, monitors verification measuring instrument and component with high precision instrument.As ammeter, voltmeter, The precision of active table, idle table, if exceed defined error range, adjustment complies with requirement.Inspection current transformer, The no-load voltage ratio of voltage transformer, transformer.

2) it is passed through voltage and current signal, adjusts the action value of voltage and current protection element, delay cell (including relay), into The adjustment of test and the sensitivity of row relay characteristic, complies with the requirement of design.It checks each control exit relay or connects Tentaculum coil whether flexible movements, normal operation.

3) DC resistance of measuring transformer, motor, generator calculates three-phase imbalance coefficient, tentatively concludes that part is revolved The quality state of rotating motor.

4) Do AC carries out ac voltage withstanding test, tests the insulation performance of High-Voltage Electrical Appliances according to the voltage class of product, such as high Voltage current transformer, voltage transformer, switch cabinet handcart, high-voltage switch gear, insulator, transformer, generator, motor, capacitor Device, arrester, insulating oil etc. when doing this work, have to the capacity for correctly selecting test apparatus, preferably use electrostatic potential Table, monitoring primary side voltage, will slowly uniformly when boosting.

5) the fracture performance for measuring each killer switch respectively with high-voltage switch gear tester, checks three same period situations.

Total group test:

1) direct current public system test, emphasis check whether single loop itself wiring is correct.

2) test of single loop, control loop.This test, emphasis check whether single loop itself wiring is correct, various switches, Plug, button, relay contact whether contact well, itself interlocking it is whether safe and reliable, switch division freely.Dissipating public loop Whether link up.

3) can various alarm signals normally send.

The simulation test of electrical equipment:

1) fault-signal is simulated.

2) interlocking signal is simulated.Check whether the operation of system equipment can act according to design requirement, signal of transmitting messages, from And further examine the Reliability of Microprocessor of electrical equipment and the fine status of electric wiring.

3) analog voltage current fault signal such as simulates 1 section of inlet wire and low voltage signal occurs, checks whether alarm signal can be sent out Low voltage signal out, incoming switch whether delay tripping, whether bus connection switch can automatic closing.As simulated the short circuit event of certain circuit Barrier, the circuit switching should be able to trip, concurrent alarm signal.

The power transmission measure of electrical equipment

1) check that high pressure equipment, transformer, low-voltage equipment are no ground.

2) special messenger checks the insulation of high-pressure system and all low-pressure systems and has record, checks (including high-tension cable) phase sequence Phase is correct.

3) position of a switch is reexamined, all high-pressure and low-pressure switches must pull open position in open position, grounding switch It sets.

4) all electric substation's high and low pressure equipment, used direct current system simulate energization test.

5) all power transformations are provisioned and enough managing security tools and instruments (insulated shoes, insulating glove, insulating bar, electroscope, fire extinguishing Device etc.)

6) operator should be familiar with the operation item of power transmission scheme, get out operation order, and configure full-time care provider.

7) it wants someone to check when all electric substation's power transmissions are impacted and monitors its impact condition, all should be normal.

Environmental protective measure

1) used oily gloves, oilcloth are recycled, and are stored classifiedly, and recycle bin is sent to.

2) used battery is recycled in measuring instrument.

It is needed to pay attention in the implementation process of above-mentioned operation engineering method:

The installation of high and low pressure cabinet, distribution box

1, the pedestal of switchboard is made of 10# galvanizing bath steel, the steel plate of firm banking, at civil construction basis or terrace Pre-buried, when installation, welds pedestal channel steel with bottom plate, and pedestal channel steel is made to keep smooth.

2, switchboard fixation is fixed by bolts, and pedestal is first opened the hole for being greater than the diameter of bolt, and the size of hole is answered It matches with power distribution cabinet base holes, bolt is then passed through into pedestal and power distribution cabinet hole, is fixed with bolt, gasket, nut.Power distribution cabinet Metal framework and basic channel steel be equipped with ground connection (PE) or meet zero (PEN) reliably, the openable door equipped with electric appliance, door or frame Ground terminal between using copper weave band connection, and be equipped with ground connection mark.

Connection should securely between equipment and component in 3 low-voltage cabinets and cabinet, its verticality of the low-voltage cabinet installed in column.Shield the paint of cabinet Layer should be complete, not damaged, and the bracket etc. of fixed electric appliance answers mopping.The ground connection of contact and cabinet body, frame between drawer and cabinet body is answered Well.

4, drawer-type distribution box drawer should it is flexibly light, without card resistance, collision phenomenon and can exchange drawer, moving contact with it is quiet The center line of contact should be consistent, and contact should be close.Mechanical interlocking or electric interlocking installation movement are correct reliable, breaker point After lock, insulating contact could be separated.The grounding contact of drawer and cabinet body should be connected closely, after drawer push-in, the ground connection of drawer Contact is first contacted than main contact, and it is opposite to pull out program.

5, between cabinet, screen between the line of route and line over the ground between insulating resistance value, feeder line has to be larger than 0.5 megaohm;It is secondary Circuit has to be larger than 1 megaohm.

Breaker installation:

1, the inspection behind breaker arrival scene should be met the following requirements:

Part, spare part and the specific purpose tool of equipment answer complete, non-corroding and damage deformation；

Opening bheck before the box packaging should be without damaged；

Smooth, flawless and defect are answered in porcelain piece surface, and casting should be without trachoma.

2, it should be checked before breaker installation:

Breaker parts member answer it is complete, cleaning, it is intact.

The pressure value of the sulfur hexafluoride gas rushed in advance in arc-chutes or tank body and insulation column and sulfur fluoride gas it is aqueous Amount should meet product technology requirement.

Equalizing capacitance, switching-on resistance value should meet the regulation of manufactory.

3, the installation of breaker should carry out under no dust storm, the weather without sleet；When arc-chutes inspection assembles, air phase 80% should be less than to humidity, and take dust-proof, moisture preventive measure；Breaker should not strip inspection at the scene, when must be existing by defect It when field is disintegrated, should agree to through manufactory, and be carried out under manufacturer personnel guidance.

4, the teamwork of breaker and operating mechanism should be met the following requirements:

Before teamwork, the sulfur hexafluoride gas of rated pressure must be filled in breaker；

Position indicator movement should be correctly reliable, point, coincidence set reality point, the conjunction state that should meet breaker；

With dividing, attaching together the person of setting slowly, must first be divided slowly before carrying out quick divide-shut brake, slow closing operation.

Cable, electrical line setting process flow: the inspection of cable raw material, cable laying, hangs sign board at preparation.

Power cable ground line should use copper stranded conductor or tin plating copper litz wire.

Bus duct construction technology process:

Equipment point part inspection, bracket production and installation, socket sealed busbar trunking installation, trial operation are checked and accepted.

Equipment point part inspection:

The unpacking point part inspection of equipment, should have installation unit, construction unit or supply unit to carry out jointly, and make a record.

Check that equipment and attachment, specification, quantity, kind should meet design requirement according to packing slip.

Check that equipment and attachment, segmentation marker answer clear complete, the not damaged deformation of appearance, bus insulation resistance meets design It is required that.

When checking that discovering device and attachment do not meet design and quality requirement, it is necessary to be dealt carefully with, be recognized by design Can after installed again.

Bracket production and installation:

Bracket production and installation should be by design and the production of the regulation of product technology file and installation, such as design and product technology files When no standard, makes and install by following requirements.

Bracket production:

(1), according to construction site structure type, bracket should be made of angle steel or channel steel.Should using line-styled, " 1 " type, Four kinds of " U " font, " T " font patterns.

(2), the processing and fabricating of bracket surveys measured size fracture production by the model chosen, and fracture forbids gas welding to cut, Processing dimension worst error 5mm.

(3), the simmering and bending of shaped steel frame are preferably made using bench vice with head, it is possible to use oil pressure bending device mold top system.

(4), bench drill or drilling of electric hand drill are applied in drilling on bracket, and not handy gas welding hole, aperture is not greater than fixed spiral shell Bolt diameter 2mm.

(5), screw rod hitch is processed using die head threading machine or tap, mustn't fracture of wire.

The installation of 3.2 brackets:

(1), the another crook of socket sealed busbar trunking and bracket must be added with case (disk) junction.Straight section inserts production and construction bus branch The distance of frame should not exceed 2m.

(2), note bracket cement mortar, cement-sand ratio 1: 3 are buried.No. 425 and its above cement answer cement injection full, tight, no It is higher by metope, buried depth is no less than 80mm.

(3), the fixed bracket of expansion bolt is no less than two.One hanger applies two sunpenders, fixation, and spiral shell button is exposed 2~4 buttons, expansion bolt should add plain cushion and spring pad, and hanger application double nut clamps.

(4), brush antifouling paint should uniformly at bracket and bracket and slugging, and no leakage is brushed, and does not pollute building.

The installation of enclosed bus:

This engineering uses the enclosed bus of two kinds of specifications of 3200A and 1000A to production equipment power supply, and enclosed bus construction is wanted Ask high, project amount is larger, so to strictly observe construction quality code requirement in construction work, guarantees construction quality.It is required that:

(1), socket sealed busbar trunking should be assembled by design and product technology file regulation, should be insulated to every section before assembling The measurement of resistance, measurement result should meet design requirement, and make a record.

(2), bus duct, fixed range are not greater than 2.5m.Horizontal laying height off the ground is no less than 2.2m.

(3), the end of bus duct should fill seal bootr, the connection of the shell of each section of bus duct should be it is removable, have between shell Ground wire is bridged, reliable ground is answered at both ends.

(4), bus couples with equipment preferably uses soft strength.Bus bar bolt should be provided together by producer, using torque Spanner fastening.

Bus duct is horizontally mounted along wall.Mounting height should meet design requirement, and when no requirement (NR) should not be less than 2.2m away from ground, female Line should be reliably fixed on bracket.

Bus duct suspension lifting.Sunpender diameter should be adapted with bus duct weight, and nut should be able to be adjusted.

The landing of enclosed bus is installed.Mounting height should should meet code requirement when designing no requirement (NR) by design requirement. Steel pipe or section steel manufacture can be used in column.

Enclosed bus right angle setting.Along wall or pillar, should fix bracket, and vibration abatement should be installed additional by crossing at floor, And do waterproof platform.

When enclosed bus lay length is more than 40m, telescopic joint should be set, across the expansion joints or settlement joints of building Place preferably takes the measure of adaptation that should propose this requirement when equipment is ordered goods.

The installation of enclosed bus jack box should be reliably fixed, and when right angle setting, mounting height should meet design requirement, design When no requirement (NR), jack box base opening is preferably 1.4m.

Enclosed bus right angle setting should take safeguard measure away from ground 1.8m or less.

When enclosed bus passes through firewall, fire-resisting floor, fire prevention quarantine measures should be taken.

Trial operation is checked and accepted:

Trial operation condition: changed into switchhouse has reached power transmission condition, civil engineering and decorative engineering and Other Engineering all completes, and clears up Completely.

Enclosed bus is comprehensively arranged, is cleaned up, connector connection is close, and phase sequence is correct, and the earthing of casing is good It is good.Insulation shakes survey and meets design requirement, and makes a record.

It is installed with plug-in type bus connecting device and on line, pressure test, 500V or less should be carried out before bus power transmission Bus can shake survey with 500V megger, and insulation resistance is not less than 0.5M Ω.

Power transmission will have special messenger to be responsible for, and power transmission program should be first high pressure, rear low pressure；First main line, rear branch line；After first disconnecting switch On-load switch.It is opposite with said sequence when power failure.

It should be without having hung up properly electrosemaphore board before the bus power transmission of workshop, and should have instruction after notifying units concerned and personnel's power transmission Lamp.

Power transmission idle running phenomenon without exception for 24 hours handles examination formality, and general contracting unit is handed over to use, while examination being submitted to provide Material.

Examination data includes: IMM algorithm list, change negotiation record, work certificate, certificate, test record, operation Record etc..

Switch, socket, lamp installation:

Lamp position box, switch enclosure, socket box etc. are coped in a pre-installation, are handled in advance, (such as align, level, cleaning) installation Shi Yingxian checks that position height and design requirement have zero deflection, and whether number of conductors meets, then install again.Various sockets are opened Pass etc. firmly installs, and position is accurate, and wiring is secured, and absolute altitude meets, and then installs again.Zero curve must not access switch, switch control It should be flexible.When mounting plate is switch, switch direction is answered unanimously, and upwards ' to close, downward is to close.The position of socket in figure by arranging Column, to repair.The wiring of socket, must not wrong in strict accordance with the right fiery mode of connection connection in a left side zero.

Claims (7)

1. electric substation's installation engineering method, it is characterised in that the step of engineering method includes: dry-type transformer installation, and transformer is primary Wiring, transformer accessory installation, 10kV switchgear is in place, cabinet body is fixedly mounted, equipment tune in switch cabinet bus installation, switchgear Examination, low-tension switch cabinet is in place, cabinet body is fixedly mounted, the installation of low tension switch bus, low-voltage switch equipment debugging, and low-voltage bus bar is fixed Position, low-voltage bus bar installation, equipment connection, equipment connection, cable testing bridge installation, branch, hanger installation, the assembling of cable testing bridge and Ground connection, cable laying, shrink cable termination connector fabrication and installation, stripping cable, installation ground line, wrapping filling glue, installation three It cups one hand in the other before the chest set, insulating sleeve is installed, stripping metal screen layer, semiconductive, insulating layer crimp connecting terminal, installation cold events insulation Part, lapped insulation band, cold contract cable middle joint fabrication and installation, cable centre point location strip cable sheath, stripping metal screen Layer, semiconductive, insulating layer are covered, insulating cold collapsible tube is covered, cold events adapter body is installed in conductor connection, restores metallic shield, peace Oversheath band is filled, grounded screen installation, grounding body connection, grounding body is embedded, ground line installation, ground resistance measurement, electrical test, Power cable test, wireline test, grounded screen test, Commissioning of Relay Protection, secondary circuit Insulation Test, voltage, Current Mutual Inductance Device test, secondary circuit inspection, relay, protective device debugging, total group test, primary current and operating voltage are examined, debugging Power transmission scheme, electrical equipment Adjustment Tests, the monomer assays of electrical equipment, total group test, the simulation test of electrical equipment, electrically The transmission operation of equipment.

2. electric substation's installation engineering method according to claim 1, it is characterised in that: the step of the engineering method further include: high Press the installation of cabinet, low-voltage cabinet, distribution box, breaker installation, cable, electrical line setting, bus duct construction, equipment point part inspection, branch Frame production and installation, socket sealed busbar trunking installation, trial operation are checked and accepted, switch, socket, lamp installation.

3. electric substation's installation engineering method according to claim 1, it is characterised in that: the step of electrical test includes: to become Depressor test, the test of 10kV switchgear, circuit-breaker testing, voltage transformer test, current transformer test, the entirety of switchgear Test, test of lightning arrester.

4. electric substation's installation engineering method according to claim 1, it is characterised in that: transformer primary connection: transformer The bracket of inlet-outlet line is connect with earth mat；Cable termination is reliably connected with lead, and faying surface cleaning, smooth, non-oxidation layer apply electric power Complex liped；It is to be flexible coupling and should there are nargin that plug-in type bus is connect with transformer；Transformer body ground line section is not less than Neutral conductor section 1/2；The iron core and metalwork of dry-type transformer, the protection with shield dry-type transformer metal cabinet connect Ground, transformer neutral point ground line are independently connected with electric house-owner's grounded screen respectively, and ground line both ends are crimped or welded with connecting terminal It connects, reliable ground；Exposed live part carries out insulation processing, installs high-low pressure insulating sheath additional；Paired cable inlet-outlet line connecting terminal It is overlapped respectively in the sub- two sides of appliance terminal；Transformer high-low-voltage wiring is connected with galvanized bolt.

5. electric substation's installation engineering method according to claim 1, it is characterised in that: 10kV switchgear is fixedly mounted:

It is connected with securely on the basis of First position-sensing switch cabinet with extension extending switch cabinet；

Cabinet body is connected firmly with basic section steel, cabinet single side or in column install when be connected with securely, adjacent two cabinets top horizontal Error < 2mm；Cabinet top portion horizontal error < 5mm in column；Vertical error < 1.5mm/m；Disk error: adjacent two cabinets side < 1mm, in column Cabinet face < 5mm；Cabinet seam < 2mm；

Cabinet body ground connection has every section of cabinet of cabinet body of crash roll that two o'clock or more is arranged and is grounded；

Equipped with the openable cabinet screen door of electric appliance, connected with multiply soft copper conducting wire, section > 4mm², the end line of stranded conductor is tight, Add terminal attachment or wards off tin processing.

6. electric substation's installation engineering method according to claim 1, it is characterised in that: cabinet body is fixedly mounted: cabinet body fastening Zinc-plated processing is arranged in bolt surface；Cabinet body is connected firmly with basic section steel, cabinet single side or in column install when be connected with securely, Adjacent two cabinet top portion horizontal error < 2mm；Cabinet top portion horizontal error < 5mm in column；Vertical error < 1.5mm/m；Disk error: phase Neighbour two cabinet sides < 1mm, in column cabinet face < 5mm；Cabinet seam < 2mm；

It is reliably connected equipped with the openable cabinet door of electric appliance with multiply soft copper conducting wire and cabinet metal architecture, section > 6mm², multiply leads The end line of line is tight, adds terminal attachment or wards off tin processing；

The low-tension switch cabinet for being mounted on vibration place takes precautions against earthquakes, and 10mm quakeproof rubber pad is padded between cabinet and basic section steel.

7. electric substation's installation engineering method according to claim 1, it is characterised in that: the step of equipment connects is: 1) becoming It is connected between depressor low-voltage side outlet end and hard bus with soft bus, between 30~50mm of connection length, soft two end terminal of bus Any surface finish is smooth, silver coating is complete；2) when soft bus is connect with appliance wiring terminal, appliance wiring terminal is avoided by additional Stress；3) be flexible coupling thickness, quantity of soft bus meets the overload electric current of transformer capacity；4) soft bus is connect with appliance wiring Afterwards, exposed part installs insulating sheath and phase sequence mark color additional；5) physical length docking is pressed between hard bus and low-voltage cabinet input terminal Hard bus；6) anti-break iron case is installed in inlet wire port in low-voltage cabinet face；7) reliable ground is arranged in gantry ontology and each connecting portion of gantry.