CN202210645U - 12 kV metal-armored withdrawable switching equipment applied to high altitude environment - Google Patents
12 kV metal-armored withdrawable switching equipment applied to high altitude environment Download PDFInfo
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- CN202210645U CN202210645U CN 201120404565 CN201120404565U CN202210645U CN 202210645 U CN202210645 U CN 202210645U CN 201120404565 CN201120404565 CN 201120404565 CN 201120404565 U CN201120404565 U CN 201120404565U CN 202210645 U CN202210645 U CN 202210645U
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Abstract
The utility model discloses 12 kV metal-armored withdrawable switching equipment applied to an high altitude environment, which comprises a switch cabinet, wherein the switch cabinet comprises a shell, a plurality of compartments inside the switch cabinet as well as primary components and secondary components arranged in the compartments; for the primary components of the 12 kV metal-armored withdrawable switching equipment applied to the high altitude environment, electric clearances and creepage distances of all the components are controlled to be over 140 mm and 264 mm respectively, or insulating covers are sleeved on the primary components of which the electric clearances and creepage distances cannot be satisfied, so that the insulation requirements are satisfied. The equipment disclosed by the utility model has the advantages that an external insulation strength margin is sufficiently large, so that correction requirements due to the external insulation strength reduction which is caused by high-altitude air density reduction are satisfied, therefore the impact withstanding voltage and the power frequency withstanding voltage of products reach requirements on high-altitude use; moreover, 12 kV complete switching equipment, which is suitable for high-altitude regions, has safety in use and reliability in operation and ensures service life, is provided.
Description
Technical field
The utility model relates to a kind of switchgear, is specifically related to be applied to the 12kV ac metal closing switch gear of altitude environment.
Background technology
At present, high and low pressure switchgear assembly and control appliance are the infrastructure of electrical network, are widely used in all trades and professions along with the development of electric power, and be for very big contribution has been made in national economic development and social progress, also closely bound up with common people's daily life.Because of having a large capacity and a wide range,, broad particular surroundings---the high altitude localities of market demand is just arranged wherein so environment for use is varied.The highlands is because height above sea level is higher relatively, and air pressure and density are lower, and air absolute humidity is little, and air themperature is low, and the temperature difference is big; Hours of daylight is long, and solar irradiance is higher, and ultraviolet ray is strong, and the plateau soil moisture is low simultaneously; The frozen soil area is wide, and freeze-off time is long, and year day with wind of gale force is many, and precipitation is few.These abominable natural climate characteristics have following four to influence rule greatly to the electric equipment performance:
1, the lower influence of air pressure and density
1. to the influence of dielectric intensity
The reduction of air pressure and density causes the reduction of external insulation intensity.At height above sea level to the 5000m scope, every rising 1000m, i.e. every reduction by the 7.7 ~ 10.5kPa of average gas pressure, external insulation intensity reduces by 8% ~ 13%;
2. to the influence of electric clearance puncture voltage
For the product of design typification, because its electric clearance is fixing, with the reduction of air pressure, its puncture voltage also descends.In order to guarantee that product has enough anti-breakdown capabilities when altitude environment is used, must increase electric clearance.
3. a) the high altitude low air pressure of influencing to corona and discharge voltage reduces the partial discharge inception voltage of high-voltage motor, and corona inception voltage reduces, the corona seriously corroded;
B) high altitude low air pressure descends the power capacitor air pressure inside, causes partial discharge inception voltage to reduce;
C) high altitude low air pressure reduces lightning arrester inner chamber voltage, causes power-frequency sparkover voltage to reduce.4. the reduction that influences air pressure or atmospheric density to the device for switching arc extinction performance reduces the device for switching arc extinction performance of air dielectric arc extinguishing, and make-break capacity descends and the energising lost of life.The arcing time of direct-current arc raises with height above sea level or the air pressure reduction prolongs; The flashover distance of direct current and alternating current arc raises with height above sea level or the air pressure reduction increases.5. to the medium cooling effect, i.e. the reduction that influences air pressure or atmospheric density of product temperature rise causes the reduction of air dielectric cooling effect.For being the electric product of main radiating mode with free convection, forced ventilation or air radiator, because the decline of heat-sinking capability, temperature rise increases.At height above sea level to the 5000m scope, every rising 1000m, i.e. every reduction by the 7.7 ~ 10.5kPa of average gas pressure, temperature rise increases by 3% ~ 10%.
A) rate that increases that raises with height above sea level of the temperature rise of static electrical equipment, every 100m generally in 0.4K, but to thermoelectric device occurred frequently, like electrical equipment such as electric furnace, resistor, electric welding machines, the rate that increases that temperature rise raises with height above sea level, every 100m reaches more than the 2K.B) the power transformer temperature rise is relevant with the type of cooling with increasing of height above sea level, and the every 100m of its increment rate is: oil, 0.4% of specified temperature rise; Dry type is self cooling, 0.5% of specified temperature rise; Oil-immersed air-blast cooling, 0.6% of specified temperature rise; The dry type forced air cooling, 1.0% of specified temperature rise; C) temperature rise of motor is 1% of specified temperature rise with the every 100m of the rate that increases that height above sea level raises.6. influencing of product mechanical structure and sealing a) caused low-density, low concentration, the physics of porous material (for example: electrical insulating material, heat-barrier material etc.) and the variation of chemical property; B) volatilization of plasticizer is quickened in the evaporation of lubricant and the plastic products; C) owing to the increase of external and internal pressure difference, gas or liquid are prone to from airtight container, leak or leakage rate increases, and the electric product of seal request is arranged, and remote-effects are to electric property; D) cause the variation of pressure that pressure-vessel bears, cause pressure-vessel to break easily.
2, the influence that reduces of air absolute humidity
1) influence of the external dielectric strength of absolute humidity
Average absolute humidity raises with height above sea level and reduces.When absolute humidity reduced, the external insulation intensity of electric product reduced, and therefore will consider the humidity correction of power-frequency sparkover voltage and impulse flashover voltage.
2) absolute humidity increases the commutation spark of commutator machine to the reduction that influences absolute humidity of motor commutation and carbon brush wearing and tearing, and the wear rate of motor carbon is increased.
3, the influence that air themperature reduces and the temperature difference increases
1) the altitude environment air themperature all raises with height above sea level to the compensation average air temperature of product temperature rise and high air temperature and reduces, and the thermal lifetime of electrical insulating material is decided by the average air temperature.The reduction of altitude environment air themperature can partly or entirely compensate the increase because of air pressure reduction causing electric product temperature rise in service.The offset of ambient air temperature is 0.5K/hm.2) variations in temperature makes product casing easy deformation, be full of cracks to the bigger variations in temperature of the influence of product structure, and hermetically-sealed construction breaks easily.
4, the hours of daylight long, solar irradiance comprises the influence that ultraviolet radiation illumination increases1) the plateau thermal radiation increases when influencing height above sea level 5000m maximum solar degree 1.25 times of analog value during for low height above sea level, thermal radiation plays heat effect to object.For the outdoor electric product, the increase of sun heat radiation causes that bigger surface adds temperature rise, makes japanning accelerate to fade, the plastics accelerated ageing, and the material capability of reduction organic insulating material produces mechanical thermal stress.And reduce machinery and electric property, produce the influence such as be obstructed of lubriation material curing, oily evaporation, heat radiation of electrical apparatus or resistance heating.2) the plateau ultraviolet radiation increases, and to influence ultraviolet radiation illumination more much bigger than the increment rate of global solar radiation illumination with the increment rate that height above sea level raises, when having reached low height above sea level during height above sea level 3000m 2 times of analog value.Ultraviolet ray causes that the surface of organic insulating material changes, and the mechanical performance of thin-walled or plastic film and electric property are worsened, and transparent plastic becomes fragile even chaps.The accelerated ageing of insulating material also possibly make the easy ionization of air and cause external insulation intensity and corona inception voltage to reduce.The components and parts of existing widely used electric complete set of equipments shell structure and technology, type selecting assembling and insulating material etc., by national technical standard limit environment for use be high voltage electric equipment at height above sea level below 1000 meters, low voltage electrical equipment is at height above sea level below 2000 meters.Therefore, existing electric complete set of equipments can not satisfy the stability that the highlands electric equipment must possess safe handling and reliability service well, satisfies the requirement in certain useful life.
The utility model content
The utility model has overcome the deficiency of prior art; A kind of special 12KV metal-clad moveable formula switchgear to the altitude environment design is provided; This switchgear is to the special Environment Design in plateau; Solved can not satisfying the highlands electric equipment well and must possessing the safe handling and the stability of reliability service, the technical problem that lack useful life of existing in the prior art.
For solving above-mentioned technical problem, the utility model adopts following technical scheme:
A kind of 12KV metal-clad moveable formula switchgear that is applied to altitude environment; Comprise switch cubicle; And described switch cubicle is by a plurality of compartments in shell and the switch cubicle and be installed in components and parts and the Quadratic Finite Element device in the compartment, and described components and parts comprise: current transformer, voltage transformer, earthed switch, vacuum circuit-breaker, contactor, fuse, transformer, insulating part, main bus bar and branch bar, high voltage reactor, high pressure parallel single-phase capacitor; Described a plurality of compartment comprises circuit breaker cart chamber B, bus-bar room A, the C of cable vault, relay control room, separates with dividing plate between a plurality of compartments; Above described circuit breaker cart chamber, bus-bar room, cable vault, be equipped with pressure relief device; In the B of circuit breaker cart chamber, guide rail is installed, the confession circuit breaker cart slides and works; Bus casing and fixed contact box are installed in the bus-bar room A, and bus casing is used for fixing main bus bar and satisfies the main bus bar insulating requirements; The top of the described C of cable vault and rear portion are equipped with current transformer, earthed switch; The Quadratic Finite Element device that the described relay D of control room is equipped with relaying protection element, instrument, electrification display and primary element is monitored, controls, protected; Between the components and parts of the described 12kV metal-clad moveable formula switchgear that is applied to altitude environment or with the electric clearance of each components and parts with creepage distance is controlled at 140mm respectively and more than the 264mm; Put insulating cover can not satisfying on the components and parts of electric clearance and creepage distance, to satisfy insulating requirements.
Technical scheme further is:
In the described C of cable vault lightning arrester is installed.
Described circuit breaker cart chamber B, the C of cable vault add heater respectively.
Voltage transformer handcart, metering handcart can be installed in the described circuit breaker cart chamber B, isolate handcart etc.
The little bus of described main bus bar and branch all adopts rectangular bus bar.
Set up 5 * 40mm separately in the described C of cable vault
2The ground connection copper bar.
Compared with prior art, the beneficial effect of the utility model is:
1, external insulation intensity nargin is enough big, satisfied that high height above sea level atmospheric density descends the external insulation intensity decreases that causes and the requirement revised, thereby the shock-resistant voltage of product and power-frequency withstand voltage reaches the requirement of high height above sea level use; 2, insulating material is selected for use and is received the little and high insulating material (like DMC or SMS moulding compound etc.) of anti-aging degree of difference variation; Guaranteeing the high-intensity while; Deflection and degree of aging are less; Adapted to the place that insulation coordination is had relatively high expectations,, satisfied creepage distance, the electric clearance dimensional requirement of height above sea level correction factor requirement simultaneously like bus frame of low pressure etc.
The utility model provides a kind of high pressure switchgear assembly that the high altitude localities is safe in utilization, reliable, guarantee useful life that is suitable on the whole.
Description of drawings
Fig. 1 is the utility model structural representation.
Embodiment
Below in conjunction with accompanying drawing the utility model is done further to set forth.
As shown in Figure 1, a kind of 12KV metal-clad moveable formula switchgear that is applied to altitude environment comprises switch cubicle, and switch cubicle is made up of a plurality of compartments in shell 2 and the switch cubicle and the components and parts and the Quadratic Finite Element device that are installed in the compartment.No. one time components and parts comprise: current transformer, voltage transformer, earthed switch, vacuum circuit-breaker, contactor, fuse, transformer, insulating part, main bus bar and branch bar, high voltage reactor, high pressure parallel single-phase capacitor or the like; Described a plurality of compartment comprises circuit breaker cart chamber B, bus-bar room A, the C of cable vault, the D of relay control room, opens in 18 minutes with dividing plate between a plurality of compartments; The shell of switch cubicle and dividing plate are to be spliced after Digit Control Machine Tool processing with 2mm aluminizing zinc steel plate, and the switch cubicle that therefore assembles can be protected the uniformity on the size.Switch cubicle has very strong anticorrosive and antioxidation, and the mechanical strength higher than equal steel plate arranged.Between the components and parts of the utility model or with the electric clearance of each components and parts with creepage distance is controlled at 140mm respectively and more than the 264mm; Put insulating cover can not satisfying on the components and parts of electric clearance and creepage distance, to satisfy insulating requirements.
Above circuit breaker cart chamber B, bus-bar room A, the C of cable vault, be equipped with pressure relief device 1; When circuit breaker or bus generation internal fault, follow the appearance of electric arc, the switch cubicle air pressure inside raises; The special seal circle that is installed on the door seals the cabinet front; The pressure that install at the top discharges metallic plate will be opened automatically, and release pressure and drainage gas are to guarantee operating personnel and switch cubicle safety.In the B of circuit breaker cart chamber, guide rail is installed, confession circuit breaker cart 16 slides and works; Bus casing 4 and fixed contact box 7 are installed in the bus-bar room A, and main bus bar 5 causes another switch cubicle from a switch cubicle, fixing through contact box 7, bus casing 4 is used for fixing main bus bar 5 and is convenient to it and passes through the switch cubicle dividing plate; All bus can coat with the pyrocondensation insulating sleeve as required.The little bus of flat branch is connected in fixed contact box 7 and main bus bar through bolt, if special requirement is arranged, the attachment bolt on the bus row can have insulating case and end cap encapsulation.When bus passes through the switch cubicle dividing plate, fixing with bus casing 4, if internal fault electric arc can the restriction accident spread to adjacent cabinet, and can ensure the mechanical strength of bus.Main bus bar 5 all adopts rectangular bus bar with the little bus 3 of branch.
The top of the C of cable vault and rear portion are equipped with current transformer 8, earthed switch 9; Lightning arrester 11 is installed, the Quadratic Finite Element device that the D of relay control room is equipped with relaying protection element, instrument, electrification display and primary element is monitored, controls, protected in the C of cable vault.Control circuit is laid in the wire casing in enough spaces; And have the metal cover board envelope to protect, and the left side wire casing is to reserve for the introduction of controlling little bus, the secondary wire routing of switch cubicle inside is on the right side; Also has reliable interlock in the switch cubicle, for operating personnel and equipment provide reliable fail safe protection.Circuit breaker cart chamber B, the C of cable vault add heater respectively, can prevent in the bigger climatic environment of high humility or variations in temperature, to produce the danger that condensation brings.Set up 5 * 40mm in the C of cable vault separately
2The ground connection copper bar, this ground connection copper bar can run through adjacent each cabinet, and well contacts with cabinet; This ground connection row supplies the components and parts of direct ground connection to use; Because the cabinet shell splices with the aluminizing zine plate mutually, the permutation cabinet all is among the good earth state simultaneously, guarantees the operation personal security.
Be described in detail the application of the utility model below again.
The environment for use condition of the utility model:
Height above sea level: be no more than 4000M;
Ambient air temperature is no more than 40 degrees centigrade, and the temperature-averaging value that in 24 hours, records is no more than 35 degrees centigrade;
Minimum ambient air temperature is not less than-25 degrees centigrade;
Ambient humidity: per day relative humidity is not more than 95%, and monthly mean relative humidity is not more than 90%;
The place that does not have high vibration;
Earthquake intensity is no more than 8 grades.
In order to adapt to the needs of altitude environment; The utility model is chosen as electric equipment, especially the high pressure components and parts of the special development in high altitude localities, as adopting plateau type transformer, plateau type vacuum circuit-breaker etc.; For between the cabinet inner wire, the air gap of conductor between over the ground handle by high altitude localities insulation distance requirement; Prevent insulation breakdown, or adopt the more electric equipment of voltage levels, like voltage, current transformer and insulating part etc.; Electric clearance is controlled at more than the 140mm, and the creepage distance of components and parts is controlled at more than the 264mm.And, also satisfy the requirement of high height above sea level for control device.4 requirements are considered and satisfied to the components and parts and the insulating material type selecting that are applied to the 12KV metal-clad moveable formula switchgear of altitude environment:
1. external insulation intensity nargin is enough big, satisfied that high height above sea level atmospheric density descends the external insulation intensity decreases that causes and the requirement revised, thereby the lightning impulse withstand voltage of product and power-frequency withstand voltage reaches the requirement of high height above sea level use; 2. for complete set of equipments internal mechanical driving member, cause the influence of material deformation greatly to tolerance like consideration plateau variations in temperature such as operation handcart, releases; 3. the reduction of air pressure or atmospheric density causes the reduction of air dielectric cooling effect; The influence that causes temperature rise to raise, especially high-current device has been considered to fall to hold and has been used; It falls the appearance coefficient confirms according to height above sea level is different, concrete with reference to the technical descriptioon of device production producer.4. insulating material is selected for use and is received the little and high insulating material (like DMC or SMS moulding compound etc.) of anti-aging degree of difference variation, is guaranteeing the high-intensity while, and deflection and degree of aging are less, have adapted to the place that insulation coordination is had relatively high expectations.
It is higher to the arrangement requirement of first and second line that the utility model is applied to the 12kV metal-clad moveable formula switchgear of altitude environment, and whole bus-bar system designs again.Electric clearance and creepage distance are revised according to the correction factor of high height above sea level, and temperature rise heat radiation requirement is satisfied in reasonable, the attractive in appearance and the shortest design of busbar of whole spatial placement.The utility model is a benchmark with the 1000m height above sea level, and the determined coefficient of national standard is satisfied in the correction of height above sea level coefficient.Different altitude height, its correction factor is different, is not influencing under the big situation too of structure and shape size; Absolute elevation raises as far as possible; Because by the rule of its correction factor, the height that the correction factor of higher height above sea level can compatible next grade can reduce the design kind like this; Reduce multiple type that absolute elevation caused, make things convenient for the standardization drawing.The switch cubicle structural design key place of the utility model is to be furnished with enough locus and carries out the installation of bus-bar system; Need revise according to the height above sea level correction factor based on electric clearance, creepage distance equidimension parameter, so be different from conventional products.Reserving on the physical dimension chain relation based on the bigger size under the height above sea level factor, so total has been done design again.Structural design designs on three-dimensional software, gives the revised data of the just direct use of inspection that size is interfered.Assembly part interference checking to around the busbar is all undertaken by revised data, and the design and simulation simulation has guaranteed that the size of respective electric gap, creepage distance satisfies the correction requirement like this.The structural design of the utility model has been taken all factors into consideration the situation of dimension chain relationship change in a word, designs to meet the structure that correction value requires.
Claims (6)
1. 12kV metal-clad moveable formula switchgear that is applied to altitude environment; Comprise switch cubicle; And described switch cubicle is made up of a plurality of compartments in shell (2) and the switch cubicle and the components and parts and the Quadratic Finite Element device that are installed in the compartment, and described components and parts comprise: current transformer, voltage transformer, earthed switch, vacuum circuit-breaker, contactor, fuse, transformer, insulating part, main bus bar and branch bar, high voltage reactor, high pressure parallel single-phase capacitor; Described a plurality of compartment comprises circuit breaker cart chamber (B), bus-bar room (A), cable vault (C), relay control room (D), separates with dividing plate (18) between a plurality of compartments; In described circuit breaker cart chamber (B), the top of bus-bar room (A), cable vault (C) is equipped with pressure relief device (1); In circuit breaker cart chamber (B), guide rail is installed, confession circuit breaker cart (16) slides and works; Bus-bar room (A) lining is equipped with bus casing (4) and fixed contact box (7), and bus casing (4) is used for fixing main bus bar (5) and satisfies the main bus bar insulating requirements; Top, the rear portion of described cable vault (C) is equipped with current transformer (8), earthed switch (9); The Quadratic Finite Element device that described relay control room (D) is equipped with relaying protection element, instrument, electrification display and primary element is monitored, controls, protected; It is characterized in that: between the components and parts of the described 12kV metal-clad moveable formula switchgear that is applied to altitude environment or with the electric clearance of each components and parts with creepage distance is controlled at 140mm respectively and more than the 264mm; Put insulating cover can not satisfying on the components and parts of electric clearance and creepage distance, to satisfy insulating requirements.
2. the 12kV metal-clad moveable formula switchgear that is applied to altitude environment according to claim 1 is characterized in that: lightning arrester (11) is installed in described cable vault (C).
3. the 12kV metal-clad moveable formula switchgear that is applied to altitude environment according to claim 1, it is characterized in that: described circuit breaker cart chamber (B), cable vault (C) add heater respectively.
4. the 12kV metal-clad moveable formula switchgear that is applied to altitude environment according to claim 1 is characterized in that: voltage transformer handcart, metering handcart are installed in the described circuit breaker cart chamber (B), isolate handcart.
5. the 12kV metal-clad moveable formula switchgear that is applied to altitude environment according to claim 1, it is characterized in that: the little bus of described main bus bar (5) and branch (3) all adopts rectangular bus bar.
6. the 12kV metal-clad moveable formula switchgear that is applied to altitude environment according to claim 1 is characterized in that: set up 5 * 40mm separately in described cable vault (C)
2The ground connection copper bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120404565 CN202210645U (en) | 2011-09-28 | 2011-09-28 | 12 kV metal-armored withdrawable switching equipment applied to high altitude environment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120404565 CN202210645U (en) | 2011-09-28 | 2011-09-28 | 12 kV metal-armored withdrawable switching equipment applied to high altitude environment |
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| Publication Number | Publication Date |
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| CN202210645U true CN202210645U (en) | 2012-05-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120404565 Expired - Fee Related CN202210645U (en) | 2011-09-28 | 2011-09-28 | 12 kV metal-armored withdrawable switching equipment applied to high altitude environment |
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| CN (1) | CN202210645U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102916350A (en) * | 2012-09-29 | 2013-02-06 | 江苏中自电气技术有限公司 | High-voltage cabinet |
| CN104064977A (en) * | 2014-06-06 | 2014-09-24 | 合肥鑫伟电力设备有限公司 | Switch cabinet for high altitude areas |
| CN105071246A (en) * | 2015-07-31 | 2015-11-18 | 太仓宏光自控电器设备有限公司 | AC low-voltage power distribution cabinet |
| CN105305238A (en) * | 2015-09-25 | 2016-02-03 | 李聪 | Insulated power switch cabinet |
-
2011
- 2011-09-28 CN CN 201120404565 patent/CN202210645U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102916350A (en) * | 2012-09-29 | 2013-02-06 | 江苏中自电气技术有限公司 | High-voltage cabinet |
| CN104064977A (en) * | 2014-06-06 | 2014-09-24 | 合肥鑫伟电力设备有限公司 | Switch cabinet for high altitude areas |
| CN105071246A (en) * | 2015-07-31 | 2015-11-18 | 太仓宏光自控电器设备有限公司 | AC low-voltage power distribution cabinet |
| CN105305238A (en) * | 2015-09-25 | 2016-02-03 | 李聪 | Insulated power switch cabinet |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120502 Termination date: 20150928 |
|
| EXPY | Termination of patent right or utility model |