CN105846335B - A kind of 12kV current-carrying 1250A solid insulation switch cabinets - Google Patents

A kind of 12kV current-carrying 1250A solid insulation switch cabinets Download PDF

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Publication number
CN105846335B
CN105846335B CN201610308985.3A CN201610308985A CN105846335B CN 105846335 B CN105846335 B CN 105846335B CN 201610308985 A CN201610308985 A CN 201610308985A CN 105846335 B CN105846335 B CN 105846335B
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China
Prior art keywords
insulation
switch
isolation
current
contact
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CN105846335A (en
Inventor
张增起
曾锦河
龙捷峰
刁庆宪
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GUANGDONG PURLUX ELECTRIC CO Ltd
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GUANGDONG PURLUX ELECTRIC CO Ltd
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02BBOARDS, SUBSTATIONS, OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B13/00Arrangements of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
    • H02B13/005Electrical connection between switchgear cells
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02BBOARDS, SUBSTATIONS, OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B13/00Arrangements of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
    • H02B13/01Arrangements of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with resin casing
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02BBOARDS, SUBSTATIONS, OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B1/00Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
    • H02B1/015Boards, panels, desks; Parts thereof or accessories therefor
    • H02B1/04Mounting thereon of switches or of other devices in general, the switch or device having, or being without, casing
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02BBOARDS, SUBSTATIONS, OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B1/00Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
    • H02B1/20Bus-bar or other wiring layouts, e.g. in cubicles, in switchyards

Abstract

The invention discloses a kind of 12kV current-carrying 1250A solid insulation switch cabinets, including casing, insulation square tube is provided with the middle part of the casing, vacuum switch, disconnecting switch, earthed switch are respectively arranged with the insulation square tube.Be provided with metallic shield ground plane outside the insulation square tube, the spring energy-storage operating mechanism, blocking mechanism are arranged on square tube side of insulating, respectively with vacuum switch, disconnecting switch, earthed switch drive connection.Patent of the present invention is using insertion boundling bus structure, no matter the terminated line before and after inlet-outlet line system, enough conductive sections can be ensured, using watchband-shaped contactor technology, contact is uniformly distributed, and reduces conductor length, reduce bulk loop resistance, the uneven conducting problem in large-current electric contact is avoided, crimping caused by solution conductor temperature distortion is unreal, and thus further caused pernicious problem on deformation of generating heat.So that 12kV solid insulation switch cabinet rated current grades reach 1250A.

Description

A kind of 12kV current-carrying 1250A solid insulation switch cabinets
Technical field
The present invention relates to transmission & distribution switch cabinet field, and in particular to a kind of 12kV current-carrying 1250A solid insulation switch cabinets.
Background technology
Solid insulation ring main unit is three kinds of a kind of collection isolated bus, assembled unit miniaturization, outer sealing technology one, is switched And high-voltage live parts carry out Integral sealing encapsulating using solid insulating materials such as epoxy resin, and band is used as using solid insulating material Electric body over the ground and alternate major insulation, and a kind of new distribution of the conduction of its outer surface or semiconductive shielding layer reliable ground is set Standby, national grid and south electric network generally use.
With the domestic a large amount of popularization and applications of solid insulation cabinet in recent years, expensive import solid insulation partly instead of Cabinet, to revitalize the industry of name race, realize that " Chinese dream " has made indelible contribution.But existing for current domestic solid insulation cabinet Problem should not also be ignored.The domestic solid insulation cabinet condition of production is made a general survey of, except solid insulation body structure has monoblock type and A, B, C Outside two big type of split-phase type, each design producer inner member arrangement is variant, and solid insulation cabinet quality is very different.Than Such as:Most of design producers are limited to no technical force, domestic professional software, and major insulation module does not carry out stress, electric field, office The simulation studies such as portion's electric discharge, electric field shielding, by Experience Design;For another example:Vacuum interrupter in major insulation module is vertical mostly Arrangement, operating mechanism are placed in major insulation module top;The bus connected mode used in major insulation module connects for male-tapered.By The top of major insulation module is placed in operating mechanism, and solid insulation ring main unit will also ensure that more than 650mm cable connection is high Degree, cause the operation excessive height of solid insulation ring main unit;Size is also larger.
Following drawback be present in existing design:
1st, at present, almost domestic solid insulation cabinet cable incoming-outgoing wire uses slightly cylindrical cable inlet-outlet line insulation terminals knot Structure, it can only be restricted by 630A rated current, solid insulation cabinet use range.Solid insulation cabinet cable incoming-outgoing wire is to pass through Slightly cylindricality wiring pile end brass bolt, which is connected, realizes current lead-through.And the conductive effective sectional area of M16 bolts is 154mm2, lead to Crossing rated current 630A has no problem, but runs into 2 tunnels of branch's lead-out wire series connection and connect, in the case of rated current 1250A, current End and interbus attachment structure caloric value at least increase 50%.Cold deformation problem:Because cable gravity is produced under cable Pendant, in the presence of cable tenesmus, this position of wiring pile can produce cold deformation problem, contact bolt and binding post upper end Separation can be produced, screw thread also relative deformation, causes thread contact imbalance of pressure.Because the contact of threaded upper portion diminishes;Under Portion extrudes, and contact area reduces, and causes contact resistance to increase, once particularly these gaps are influenceed by condensation, just Corrosion oxidation can occur, oxide can further speed up this vicious circle, so that corrosion is serious to can not bear normal volume Determine electric current.Thermal deformation problem, cable termination and wiring pile connecting portion are generated heat due to the influence of electric current under running status, metal Part expands, and when load reduces, metalwork temperature reduces, cold and hot dilation, daily so so that metalwork fatigue, produces Permanent deformation, overall contact site relaxation, causes contact resistance to increase and stimulates and produce caloric value increase.Improve large-current electric The structure of cable inlet-outlet line insulation terminals should be important necessary.
2nd, electric-conductor moulding corner angle are excessive and change the defects of electric field collection without effective measures, cause the insulating part life-span to drop It is low, typically influenceed in 3 years or so time insulating materials by electric field, produce obvious electric discharge phenomena.Partial key position distortions are old Change, so that producing earth fault and phase fault.Therefore, without conductive or semiconductive shielding layer outside solid insulation When, the untouchable potential safety hazard of induced-current human hand be present;And attached painting conduction or semiconductive shielding layer outside solid insulation After ground connection, shelf depreciation index exceeds Industry code requirements again.
3rd, isolation switch blade slab organization, shelf depreciation problem can not be solved, and blade is inserted into static contact, due to stress Greatly, cannot be completely inserted into, contact is incomplete, and dynamic thermal stability is poor.Original structure air insulation clearance is too small, and insulation creep distance is too small, And without room for improvement.Cause equipment can not be in normal operation under high altitude condition.
4th, parts of traditional solid insulation cabinet vacuum interrupter and interbus standoff distance are inadequate, during arcing between contact Longitudinal magnetic field is by interbus magnetic field suction, and non-formation Rotating with Uniform magnetic field, easily burns molten cu cr contact material.
5th, the dynamic and static contact of disconnecting switch of some solid cabinets design is arranged on insulator mostly, it is middle either with or without Ground connection isolation, has leakage current by false fracture be present.After switch cubicle uses several years, because electric discharge, attaching particles thing etc. Dielectric level declines year by year, ultimately results in apparatus insulated failure.Therefore, GB1985-2003《High voltage isolator and ground connection are opened Close》Middle clear stipulaties:Leakage current that should not be dangerous between isolation fracture is present.
6th, some solid insulation cabinets use two station disconnecting switchs, and also some products use tri-station isolating switch, or match somebody with somebody Put independent earthed switch.The problem with grounding for solving all insulation equipment is can be very good using tri-station isolating switch, but will be led It is long to activate contact travel, device height or depth increase.
The content of the invention
A kind of in view of the above-mentioned problems, the present invention is intended to provide 12kV current-carrying 1250A solid insulation switch of safety and stability Cabinet.
To realize the technical purpose, the solution of the present invention is:A kind of 12kV current-carrying 1250A solid insulation switch cabinets, including Casing, panel, blocking mechanism, spring energy-storage operating mechanism, bus base, outlet insulating base, insulation square tube, the casing middle part are set The insulation square tube being made up of upper insulating base and lower insulating base is put, is increased between the upper insulating base and lower insulating base exhausted Teflon insulation plate is provided with the maze-type structure of edge creep distance, is set respectively in the upper insulating base and lower insulating base Vacuum switch, disconnecting switch, earthed switch, bus base, outlet insulating base are equipped with, the insulation square tube peripheral hardware is equipped with spring energy-storage Operating mechanism, drive connection between the spring energy-storage operating mechanism and blocking mechanism, the blocking mechanism are opened with vacuum respectively Pass, disconnecting switch, earthed switch drive connection;
The vacuum switch, disconnecting switch, earthed switch are electrically connected with conducting rod respectively, and the casing internal upper part is provided with Bus base, the casing inner bottom part are provided with outlet insulating base, and the casing front is provided with the transparent windows of convenient observation;
The disconnecting switch includes isolation static contact, isolation moving contact, insulating sleeve, isolation connection end, the isolation Static contact is fixed with insulation square tube, is isolated on static contact and is provided with spring touch finger, and isolation moving contact passes through horizontal movement plug-in type Connection isolation static contact, the tail end of the isolation static contact are cased with the insulating sleeve for increasing creep age distance, and the isolation is dynamic Contact tail is fixedly connected with isolating connection end, and the blocking mechanism is with isolating connection end drive connection, the isolation static contact Electrically connected with conducting rod, the insulating sleeve is umbrella-skirt type structure;
The earthed switch includes grounding static contact, ground connection moving contact, grounding connection end, and the grounding static contact is set In ground connection moving contact front end, the ground connection moving contact tail end is fixedly connected with isolating connection end, and the blocking mechanism connects with ground connection Connect end drive connection;
The vacuum switch includes air compartment, vacuum interrupter, insulating pull rod for breaker, and the air compartment is arranged on Between vacuum interrupter and disconnecting switch, the vacuum interrupter is horizontally set on below the safe distance of bus base, and vacuum is gone out Arc chamber tail end is connected with insulating pull rod for breaker.
Preferably, the isolation moving contact, isolation static contact are column construction, two groups of isolation moving contact combinations are in U Type structure, two groups of isolation moving contact front ends have been respectively connected with one group of isolation static contact, parallel between two groups of isolation static contacts to set Put.
Preferably, it is respectively arranged with spring touch finger on the bus base and grounding static contact.
Preferably, the outlet insulating base includes insulation screen, stress set, insulative cap, fixing nut, powered aobvious Show hermetyic window, described conducting rod one end nesting is fixed in insulation screen, and the insulation screen lower end is provided with stress set, Outlet cable electrically connects through stress set with conducting rod, and the conducting rod tail end is connected with two groups of outlet cables, the outlet electricity Cable is fixedly connected by fixing nut with conducting rod, is also cased with insulative cap outside the fixing nut, the conducting rod tail end is also It is connected with the powered display hermetyic window for showing the powered situation of conducting rod.
Preferably, resistivity is coated with as 10 outside the insulation square tube8-1012Ω semi-conductive layers.
Preferably, the conducting rod, isolation moving contact and ground connection moving contact are not have angular flexible transition structure.
Preferably, the upper insulating base of the insulation square tube and lower insulating base conjunction portion are provided with for completely cutting off moist gas The O-ring seal of body.
Preferably, intelligent controller and sensor are additionally provided with the casing, the sensor and intelligent controller Electrical connection.
Beneficial effects of the present invention, the conducting rod of patent the application of the present invention and occur female using insertion boundling between cable Line outlet insulation holder structure be attached, no matter the terminated line before and after inlet-outlet line system, enough conductions can be ensured Section, after the outlet insulating base of the structure, inlet-outlet line cable connector rated current is brought up into 1250A by 630A grades, Equipment heating is reduced simultaneously, improves the service life of equipment;
The point caused by electric field is concentrated without obvious wedge angle, is all overcome using flexible transition on inner conductive part Electric discharge phenomena are held, shelf depreciation is obviously reduced, generally using creep distance umbrella skirt construction is increased inside the square tube that insulate, reduce local put Power consumption, overall electric fields uniform;After attached painting conduction or semiconductive shielding layer are grounded outside casing, shelf depreciation meets professional standard will Ask;
Vacuum interrupter avoids bus magnetic interference, vacuum using the horizontal arrangement for deviateing bus base safe distance Longitudinal magnetic field caused by contact gap, can make electric arc be evenly distributed on contact surface during arc-chutes arcing, maintain low electric arc Voltage, so that vacuum interrupter has dielectric strength resume speed, small arc energy and small corrosion rate after higher arc, The ability and service life of vacuum interrupter drop-out current are improved, while uses watchband-shaped contactor technology, increases conductive section, is touched Point, which is uniformly distributed, reduces bulk loop resistance, avoids the uneven conducting problem in large-current electric contact, solves conductor and is become by heat Unreal, few Point contact and the thus further caused pernicious problem on deformation of heating are crimped caused by shape, in conductive section In the case of identical, current capacity significantly improves;
Disconnecting switch employs double-fracture, bicylindrical type isolation moving contact horizontal movement insertion isolation static contact spring touch finger Flexible connecting structure.There is safe air insulation clearance between upper and lower isolation moving contact, lead in the absence of false fracture leakage current Problem is crossed, moving contact movement travel reduces half;Meet GB1985-2003《High voltage isolator and earthed switch》In clearly advise It is fixed:" leakage current that should not be dangerous between isolation fracture is present." requirement.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention;
Fig. 2 is the structural representation of face view of the present invention;
Fig. 3 is the structural representation of the outlet insulating base of the present invention;
Fig. 4 is the partial structural diagram of the disconnecting switch of the present invention;
Fig. 5 is the structural representation in vertical view face of the present invention;
Fig. 6 is the structural representation of the bus base partial spring fingertip of the present invention;
Fig. 7 is the upper insulating base of the present invention and the structural representation of lower insulating base combination.
Embodiment
The present invention is described in further details with specific embodiment below in conjunction with the accompanying drawings.
As shown in figs. 1-7, specific embodiment of the present invention is a kind of 12kV current-carrying 1250A solid insulation switch cabinets, Including casing 1, panel 13, blocking mechanism 3, spring energy-storage operating mechanism 2, bus base 9, outlet insulating base 7, in the casing 1 Portion is provided with the insulation square tube of insulating base 12 and lower insulating base 11 composition, the upper insulating base 12 and lower insulating base Teflon insulation plate 14, the upper He of insulating base 12 are provided with the labyrinth type groove of increase insulation creep distance between 11 Vacuum switch 4, disconnecting switch 5, earthed switch 6, bus base 9, outlet insulating base 7, institute are respectively arranged with lower insulating base 11 State insulation square tube peripheral hardware and be equipped with spring energy-storage operating mechanism 2, driven between the spring energy-storage operating mechanism 2 and blocking mechanism 3 Connection, the blocking mechanism 3 respectively with vacuum switch 4, disconnecting switch 5, the drive connection of earthed switch 6.All bands of the application Electric position is all closed in the casing of insulation, and people can not touch, and has ensured the safety of operator;As shown in fig. 7, upper insulation base The built-in teflon insulation plate of labyrinth type groove can increase insulation creep distance between seat and lower insulating base.As shown in figure 5, institute State and include A, B, C three-phase combined electrical apparatus insulation square tube in casing 1, each phase insulate square tube by upper insulating base and lower insulation Base combination forms;Wherein A, B, C phase bus base and insulating base in A, B, C phase are that solid insulation is overall, and by phase sequence it is left, In, it is right, it is rear, in, preceding arrangement.
The vacuum switch 4, disconnecting switch 5, earthed switch 6 electrically connect with conducting rod 8 respectively, the internal upper part of casing 1 Bus base 9 is provided with, the inner bottom part of casing 1 is provided with outlet insulating base 7, and the front of casing 1 is provided with convenient observation Transparent windows.The transparent windows set by the casing of insulation towards panel direction, operator can see disconnecting switch The division gate position of earthed switch.
The disconnecting switch 5 includes isolation static contact 51, isolation moving contact 52, insulating sleeve 53, isolation connection end 54, The isolation static contact 51 is fixed with insulation square tube, and spring touch finger is provided with the top of isolation static contact, and isolation moving contact 52 passes through Horizontal movement plug-in type connection isolation static contact 51, the tail end of the isolation static contact 51 are cased with for increasing the exhausted of creep age distance Edge sleeve 53, the isolation tail end of moving contact 52 are fixedly connected with isolating connection end 54, and the blocking mechanism 3 is with isolating connection end 54 drive connections, the isolation static contact 51 electrically connect with conducting rod 8, and the insulating sleeve 53 is umbrella-skirt type structure.Insulation sleeve The inside and outside of cylinder all forms larger creep age distance using the path of umbrella-skirt type.
The earthed switch 6 includes grounding static contact 61, ground connection moving contact 62, grounding connection end 63, and the ground connection is quiet Contact 61 is arranged on ground connection moving contact 62 front end, and the ground connection tail end of moving contact 62 is fixedly connected with isolating connection end 54, described Blocking mechanism 3 and the drive connection of grounding connection end 63;
As shown in Fig. 1,4, the vacuum switch 4 includes air compartment 41, vacuum interrupter 42, insulating pull rod for breaker 43, the air compartment 41 is arranged between vacuum interrupter 42 and disconnecting switch 5, and the vacuum interrupter 42 is horizontally set on Below the safe distance of bus base 9, the tail end of vacuum interrupter 42 is connected with insulating pull rod for breaker 43.In the air insulated room It is additionally provided with illumination lamp bead.Vacuum interrupter avoids bus magnetic field using the horizontal arrangement for deviateing bus base safe distance Interference.Vacuum interrupter longitudinal magnetic field caused by contact gap during arcing, can make electric arc be evenly distributed on contact surface, dimension Low arc voltage is held, so that vacuum interrupter has dielectric strength resume speed after higher arc, small arc energy and small Corrosion rate.The design improves the ability and service life of vacuum interrupter drop-out current.
Motion shape stroke is reduced in order to improve security performance, the isolation moving contact 52, isolation static contact 51 are cylindricality Structure, two groups of isolation moving contacts 52 combine U-shaped structure, and it is quiet that two groups of front ends of isolation moving contact 52 have been respectively connected with one group of isolation Contact 51, it be arranged in parallel between two groups of isolation static contacts 51.Double-fracture, bicylindrical type moving contact horizontal movement insertion isolation stationary contact Head spring touch finger flexible connecting structure, there is safe air insulation clearance between isolation moving contact up and down, let out in the absence of false fracture Leakage current isolates moving contact movement travel and reduces half by problem, while ensure that enough air insulation clearances, accords with Close GB1985-2003《High voltage isolator and earthed switch》Middle clear stipulaties:" electric leakage that should not be dangerous between isolation fracture Stream is present." requirement.
In order to improve the stability of connection, spring touch finger 10 is respectively arranged with the bus base 9 and grounding static contact 61. The top of isolation static contact 51 is provided with spring touch finger 10.By spring touch finger, can to isolate static contact and grounding static contact It is connected between conducting rod more stable.Watchband-shaped contactor function can be realized by spring touch finger, conductive section is significantly increased, together When contact be uniformly distributed, reduce conductor length, reduce bulk loop resistance, avoid large-current electric contact in uneven conduction ask Topic, solve crimping caused by conductor temperature distortion it is unreal and thus further caused by the pernicious problem on deformation of heating.Such as Fig. 6 institutes Show, bus base also uses spring touch finger structure, and conductive section can be significantly increased, while contact is uniformly distributed, and reduces conductor length Degree, bulk loop resistance is reduced, avoid the uneven conduction in large-current electric contact.
As shown in figure 3, being stably connected with to ensure conducting rod with there is cable, the outlet insulating base 7 includes insulation and shielded Layer 71, stress set 72, insulative cap 74, fixing nut 73, powered display hermetyic window 75 are covered, described one end of conducting rod 8 is nested solid It is scheduled in insulation screen 71, the lower end of insulation screen 71 is provided with stress set 72, and the tail end of conducting rod 8 is connected with two Group outlet cable 75, the outlet cable 75 electrically connect through stress set 72 with conducting rod 8, and the outlet cable 75 passes through fixation Nut 73 is fixedly connected with conducting rod 8, is also cased with insulative cap 74 outside the fixing nut 73, the tail end of conducting rod 8 also connects It is connected to the powered display hermetyic window 76 for showing the powered situation of conducting rod.The conducting rod of the application and occur using between cable Insertion boundling bus outlet insulation holder structure be attached, no matter the terminated line before and after inlet-outlet line system, can ensure Enough conductive sections, after the outlet insulating base of the structure, inlet-outlet line cable connector rated current is carried by 630A grades Height arrives 1250A.
For the square tube ground connection that ensures to insulate, security performance, insulation square tube (i.e. upper insulating base 12 and the lower insulation are improved Pedestal 11) the outside resistivity that is coated with is 108-1012Ω semi-conductive layers.The semi-conductive layer of insulation square tube exposed face spraying can show Real grounding function, electrostatic induction is effectively removed, shield internal electric field, have the function that to lower shelf depreciation so that shelf depreciation Meet Industry code requirements.
In order to reduce point discharge phenomenon, the conducting rod 8, isolation moving contact 52 and ground connection moving contact 62 are without point The flexible excessive structural at angle.The application all uses on the inner conductive parts such as conducting rod, isolation moving contact and ground connection moving contact Flexible transition, without obvious wedge angle, the point discharge phenomenon caused by electric field is concentrated is overcome, shelf depreciation is substantially subtracted It is small.
In order to increase the seal of casing, the upper insulating base 12 of the insulation square tube and the lower combination section of insulating base 11 are set It is equipped with the O-ring seal for completely cutting off wet gas.The solid insulation switch cabinet condensation solved under high altitude condition influences insulation Problem, the square tube that preferably solves the problems, such as to insulate is by production technology and material, that mold insert is restricted yield rate is low.
In order to facilitate different clients demand, intelligent controller and sensor, the sensor are additionally provided with the casing 1 Electrically connected with intelligent controller.User can be according to different demands, by matching a variety of intelligent controllers such as FTU and other correlations Sensor device, realize different degrees of control, measurement and defencive function.
The conducting rod of patent the application of the present invention and occur between cable using the outlet insulating base knot of insertion boundling bus Structure is attached, no matter the terminated line before and after inlet-outlet line system, enough conductive sections can be ensured, using the structure After outlet insulating base, inlet-outlet line cable connector rated current is brought up into 1250A by 630A grades, while reduces equipment hair Heat, improve the service life of equipment;
The point caused by electric field is concentrated without obvious wedge angle, is all overcome using flexible transition on inner conductive part Electric discharge phenomena are held, shelf depreciation is obviously reduced, box house reduces shelf depreciation electricity generally using creep distance umbrella skirt construction is increased Amount, overall electric fields uniform;After attached painting conduction or semiconductive shielding layer are grounded outside casing, shelf depreciation meets Industry code requirements;
Vacuum interrupter avoids bus magnetic interference, vacuum using the horizontal arrangement for deviateing bus base safe distance Longitudinal magnetic field caused by contact gap, can make electric arc be evenly distributed on contact surface during arc-chutes arcing, maintain low electric arc Voltage, so that vacuum interrupter has dielectric strength resume speed, small arc energy and small corrosion rate after higher arc, The ability and service life of vacuum interrupter drop-out current are improved, while uses watchband-shaped contactor technology, increases conductive section, is touched Point, which is uniformly distributed, reduces bulk loop resistance, avoids the uneven conducting problem in large-current electric contact, solves conductor and is become by heat Crimping caused by shape is unreal, few point contact and thus further caused by the pernicious problem on deformation of heating, it is identical in conductive section In the case of, current capacity significantly improves;
Disconnecting switch employs double-fracture, bicylindrical type isolation moving contact horizontal movement insertion isolation static contact spring touch finger Flexible connecting structure.There is safe air insulation clearance between upper and lower isolation moving contact, lead in the absence of false fracture leakage current Problem is crossed, moving contact movement travel reduces half;Meet GB1985-2003《High voltage isolator and earthed switch》In clearly advise It is fixed:" leakage current that should not be dangerous between isolation fracture is present." requirement.
The present invention more meets the requirement of solid insulation ring main unit compactedness.12kV current-carrying 1250A solid insulation switch cabinets are anticipated Taste one can use when two 630A cabinets, be brought glad tidings for user, meet nation-building it is more wide in range use electrical domain.Accelerate Eliminate SF6Gas-insulated ring network cabinet, promote low-carbon ecological economic development.By conventional solid insulation cabinet vacuum interrupter sealing backbone Insulation system changes into fence insulation system.Enlarged umbrella skirt formula insulation system and cylinder insertion boundling bus cable disengaging wire Device.Make the high current solid insulation cabinet of a suitable altitude environment operating mode truly.
Described above, only presently preferred embodiments of the present invention is not intended to limit the invention, every skill according to the present invention Any trickle amendment, equivalent substitution and the improvement that art is substantially made to above example, should be included in technical solution of the present invention Protection domain within.

Claims (8)

  1. A kind of 1. 12kV current-carrying 1250A solid insulation switch cabinets, it is characterised in that:Including casing, panel, blocking mechanism, spring Stored energy operating mechanism, bus base, outlet insulating base, insulation square tube, the casing middle part are set by upper insulating base and lower insulation The insulation square tube of pedestal composition, set between the upper insulating base and lower insulating base in the maze-type structure of increase insulation creep distance Be equipped with teflon insulation plate, be respectively arranged with the upper insulating base and lower insulating base vacuum switch, disconnecting switch, Earthed switch, bus base, outlet insulating base, the insulation square tube peripheral hardware are equipped with spring energy-storage operating mechanism, the spring energy-storage Drive connection between operating mechanism and blocking mechanism, the blocking mechanism drive with vacuum switch, disconnecting switch, earthed switch respectively Dynamic connection;
    The vacuum switch, disconnecting switch, earthed switch electrically connect with conducting rod respectively, and the casing internal upper part is provided with bus Seat, the casing inner bottom part are provided with outlet insulating base, and the casing front is provided with the transparent windows of convenient observation;
    The disconnecting switch includes isolation static contact, isolation moving contact, insulating sleeve, isolation connection end, the isolation stationary contact Head is fixed with insulation square tube, is isolated on static contact and is provided with spring touch finger, and isolation moving contact is connected by horizontal movement plug-in type Isolate static contact, the tail end of the isolation static contact is cased with the insulating sleeve for increasing creep age distance, the isolation moving contact Tail end is fixedly connected with isolating connection end, and the blocking mechanism is with isolating connection end drive connection, and the isolation static contact is with leading Electric pole electrically connects, and the insulating sleeve is umbrella-skirt type structure;
    The earthed switch includes grounding static contact, ground connection moving contact, grounding connection end, and the grounding static contact, which is arranged on, to be connect Ground moving contact front end, the ground connection moving contact tail end are fixedly connected with isolating connection end, the blocking mechanism and grounding connection end Drive connection;
    The vacuum switch includes air compartment, vacuum interrupter, insulating pull rod for breaker, and the air compartment is arranged on vacuum Between arc-chutes and disconnecting switch, the vacuum interrupter is horizontally set on below the safe distance of bus base, vacuum interrupter Tail end is connected with insulating pull rod for breaker.
  2. 2. 12kV current-carrying 1250A solid insulation switch cabinets according to claim 1, it is characterised in that:The isolation is dynamic to touch Head, isolation static contact are column construction, and two groups of isolation moving contacts combine U-shaped structure, two groups of isolation moving contact front end difference One group of isolation static contact is respectively connected with, is be arranged in parallel between two groups of isolation static contacts.
  3. 3. 12kV current-carrying 1250A solid insulation switch cabinets according to claim 1, it is characterised in that:The bus base and Spring touch finger is respectively arranged with grounding static contact.
  4. 4. 12kV current-carrying 1250A solid insulation switch cabinets according to claim 1, it is characterised in that:The outlet insulation Seat includes insulation screen, stress set, insulative cap, fixing nut, powered display hermetyic window, and described conducting rod one end is nested solid It is scheduled in insulation screen, the insulation screen lower end is provided with stress set, and outlet cable is electric through stress set and conducting rod Connection, the conducting rod tail end are connected with two groups of outlet cables, and the outlet cable is fixed by fixing nut and conducting rod to be connected Connect, insulative cap is also cased with outside the fixing nut, the conducting rod tail end is also associated with being used to show the powered situation of conducting rod Powered display hermetyic window.
  5. 5. 12kV current-carrying 1250A solid insulation switch cabinets according to claim 1, it is characterised in that:The insulation square tube Outside is coated with resistivity as 108-1012Ω semi-conductive layers.
  6. 6. 12kV current-carrying 1250A solid insulation switch cabinets according to claim 1, it is characterised in that:The conducting rod, every It is not have angular flexible transition structure from moving contact and ground connection moving contact.
  7. 7. 12kV current-carrying 1250A solid insulation switch cabinets according to claim 1, it is characterised in that:The insulation square tube Upper insulating base and lower insulating base conjunction portion be provided with O-ring seal for completely cutting off wet gas.
  8. 8. 12kV current-carrying 1250A solid insulation switch cabinets according to claim 1, it is characterised in that:In the casing also Intelligent controller and sensor are provided with, the sensor electrically connects with intelligent controller.
CN201610308985.3A 2016-05-10 2016-05-10 A kind of 12kV current-carrying 1250A solid insulation switch cabinets Active CN105846335B (en)

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CN201610308985.3A CN105846335B (en) 2016-05-10 2016-05-10 A kind of 12kV current-carrying 1250A solid insulation switch cabinets

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Application Number Priority Date Filing Date Title
CN201610308985.3A CN105846335B (en) 2016-05-10 2016-05-10 A kind of 12kV current-carrying 1250A solid insulation switch cabinets

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ES1276579Y (en) 2021-03-23 2021-11-15 Ormazabal Y Cia S L U Gas insulated switchgear for medium and high voltage electrical distribution networks

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CN201263053Y (en) * 2008-09-19 2009-06-24 沈阳昊诚电力科技有限公司 Epoxy pouring tri-compartment type solid insulation switch
CN201263054Y (en) * 2008-09-19 2009-06-24 沈阳昊诚电力科技有限公司 Epoxy pouring solid insulation dual-isolation switch
CN102110954A (en) * 2010-12-14 2011-06-29 北京双杰电气股份有限公司 High-capacity upper and lower isolated solid switch cabinet
CN104466777A (en) * 2014-12-05 2015-03-25 北京合锐赛尔电力科技股份有限公司 Solid-insulated ring main unit
CN205753147U (en) * 2016-05-10 2016-11-30 广东紫光电气有限公司 A kind of 12kV current-carrying 1250A solid insulation switch cabinet

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JP3333715B2 (en) * 1997-07-07 2002-10-15 株式会社東京エンジニアリング Grounding method and apparatus for welding
JP4247009B2 (en) * 2002-03-06 2009-04-02 株式会社東芝 Switchgear

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Publication number Priority date Publication date Assignee Title
CN201263053Y (en) * 2008-09-19 2009-06-24 沈阳昊诚电力科技有限公司 Epoxy pouring tri-compartment type solid insulation switch
CN201263054Y (en) * 2008-09-19 2009-06-24 沈阳昊诚电力科技有限公司 Epoxy pouring solid insulation dual-isolation switch
CN102110954A (en) * 2010-12-14 2011-06-29 北京双杰电气股份有限公司 High-capacity upper and lower isolated solid switch cabinet
CN104466777A (en) * 2014-12-05 2015-03-25 北京合锐赛尔电力科技股份有限公司 Solid-insulated ring main unit
CN205753147U (en) * 2016-05-10 2016-11-30 广东紫光电气有限公司 A kind of 12kV current-carrying 1250A solid insulation switch cabinet

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