CN201616588U

CN201616588U - High-tension switch cabinet with high insulating property

Info

Publication number: CN201616588U
Application number: CN2010203011240U
Authority: CN
Inventors: 周长江; 王治国
Original assignee: SHAANXI BAOGUANG VACUUM ELECTRIC DEVICE CO Ltd
Current assignee: China Xidian Group Limited
Priority date: 2010-01-20
Filing date: 2010-01-20
Publication date: 2010-10-27
Anticipated expiration: 2020-01-20

Abstract

The utility model discloses a high-tension switch cabinet with high insulating property, which is characterized in that a three-phase bus bushing, a contact box, a current transformer and an earth switch are sequentially connected in a switch cabinet body via a bus, wherein the contact box is connected with a circuit breaker via the bus, insulating distance among the devices is larger than 360 mm, insulating distance from each of the devices to the surface of the switch cabinet body is larger than 360 mm, distance among the buses on the three-phase bus is larger than 360 mm, and specification of bus bars on the buses is smaller than or equal to 80*10 mm. Shielding screens are arranged in the bus bushing and the contact box, and an integrated insulating partition is arranged on the current transformer. The high-tension switch cabinet with high insulating property has better effect, and meets requirements of insulating property of 40.5kV switch cabinets used at an altitude ranging from 1500m to 3000m or in moisture environmental areas.

Description

High-tension switch cabinet with high insulating property

Technical field

The utility model belongs to the high-voltage electrical equipment technical field, relates to a kind of high-tension switch cabinet with high insulating property.

Background technology

Domestic 40.5kV switch cubicle mainly contains kinds such as XGN-40.5, KYN61-40.5, KYN72-40.5, BA1-40.5, ZS3.2, its version mainly contains three kinds of boxes, cabinet-type, armouring type, mainly contain air insulation, gas-insulated, solid insulation three major types by the insulation mode division, it is that height above sea level is below 1000 meters that environment for use requires.The 40.5kV switch cubicle is because the restriction of its structure at present, the not enough 360mm of air insulation clear distance, the switch cubicle bus casing, the contact box insulation margin is little, causes alternate, discharge relatively, behind the long-play, dielectric strength reduces, and finally causes insulation breakdown, device damage, produce discharge, CT flashover and alternate flashover in the cabinet, cause the insulation property deficiency.

Summary of the invention

The purpose of this utility model provides a kind of high-tension switch cabinet with high insulating property, has solved the problem of discharge, CT flashover and alternate flashover in the cabinet, good insulation preformance.

The technical scheme that the utility model adopted is, a kind of high-tension switch cabinet with high insulating property, in the switch cabinet, be connected with the bus casing of three-phase in turn by bus, contact box, current transformer and earthed switch, contact box also is connected with circuit breaker by bus, bus casing, contact box, current transformer, earthed switch, circuit breaker insulation distance each other is greater than 360mm, and bus casing, contact box, current transformer, earthed switch, circuit breaker insulate distance respectively greater than 360mm apart from the switch cubicle surface, vertical range between three buses that are connected respectively between three-phase bus sleeve pipe and the contact box is greater than 360mm, and the specification of busbar is smaller or equal to 80 * 10mm on the bus.

Characteristics of the present utility model also are,

The bus cover full skirt height setting straggly on bus casing surface, creepage distance is 1100mm, the inner surface of bus casing is provided with gauze screen, is provided with shielding conductor in the bus casing, and a termination of shielding conductor is arranged on the inside pipe wall of bus casing and with gauze screen and joins.

The contact box full skirt creepage distance of contact box outer surface is 1100mm, is provided with gauze screen in the contact box, and the height of insulation lengthening box is 200mm on the contact box.

Current transformer is provided with the integral type insulating barrier.

The utlity model has the high-tension switch cabinet of high insulating property, bus casing, contact box, current transformer, earthed switch circuit breaker insulation distance each other is greater than 360mm, and above-mentioned each member distance switch cubicle surface insulation distance is greater than 360mm, the distance of bus is greater than greater than 360mm between the bus casing of three-phase, the busbar specification is smaller or equal to 80 * 10mm on the bus, bus casing, be provided with gauze screen in the contact box, current transformer is provided with the integral type insulating barrier, so insulation effect is better, satisfy in 1500 meters to 3000 meters of height above sea level or humid environment area, the requirement of the insulation property of 40.5kV switch cubicle.

Description of drawings

Fig. 1 is the utility model high-tension switch cabinet structural representation;

Fig. 2 is the utility model high-tension switch cabinet median generatrix sleeve structure schematic diagram;

Fig. 3 is a contact box structure schematic diagram in the utility model high-tension switch cabinet;

Fig. 4 is a current transformer structural representation in the utility model high-tension switch cabinet.

Among the figure, 1. circuit breaker, 2. contact box, 3. bus casing, 4. current transformer, 5. earthed switch, 6. switch cabinet, 7. bus cover full skirt, 8. shielding conductor, 9. gauze screen, 10. insulation lengthening box, 11. gauze screens, 12. contact box full skirts, 13. integral type insulating barriers, 14. buses.

Embodiment

Below in conjunction with the drawings and specific embodiments the utility model is elaborated.

Structure with high-tension switch cabinet of high insulating property of the present utility model, as shown in Figure 1, be connected with bus casing 3, contact box 2, current transformer 4, the earthed switch 5 of three-phase in switch cabinet 6 in turn by bus 14, contact box 2 also is connected with circuit breaker 1 by bus 14.Wherein, bus casing 3, contact box 2, current transformer 4, earthed switch 5, circuit breaker 1 insulation distance each other is greater than 360mm, and above-mentioned each member distance switch cabinet 6 surface insulations distance is greater than 360mm.Distance between three-phase bus sleeve pipe 3 Up Highway UHWs 14 is greater than 360mm, and the busbar specification of bus 14 is smaller or equal to 80 * 10mm.

The structure of the utility model high-tension switch cabinet median generatrix sleeve pipe 3 as shown in Figure 2, the bus cover full skirt 7 height setting straggly of bus casing 3 outer surfaces, thereby increasing creepage distance makes creepage distance reach 1100mm, inner surface at bus casing 3 is provided with gauze screen 9, in bus casing 3, be provided with shielding conductor 8, wherein, a termination of shielding conductor 8 is arranged on the tube wall of bus casing 3 and with gauze screen 9 and joins.

In the utility model high-tension switch cabinet contact box structure as shown in Figure 3, the outer surface of contact box 2 is provided with contact box full skirt 12, creepage distance reaches 1100mm, is provided with gauze screen 11 in contact box 2, the height of insulation lengthening box 10 is 200mm on the contact box 2.

In the utility model high-tension switch cabinet the current transformer structure as shown in Figure 4, current transformer 4 is provided with integral type insulating barrier 13.

In the utility model high-tension switch cabinet switch cubicle inner high voltage bus apart from cabinet and bus phase insulation clear distance all greater than 360mm, greater than the requirement of 300mm among the GB GB/T11022-1999.Bus casing, contact box is an insulating part in the switch cubicle, material is an epoxy resin, and its creepage distance all reaches 1100mm, and creepage ratio is apart from 25mm/kV, reach three grades of filths, and all have gauze screen, improved the integral insulation level of switch cubicle, thereby the 40.5kV switch cubicle is 1500 meters to 3000 meters of height above sea level, or the humid environment area, avoid problems such as discharge, CT flashover and alternate flashover in the cabinet.

Claims

1. high-tension switch cabinet with high insulating property, it is characterized in that, in switch cabinet (6), be connected with the bus casing (3) of three-phase in turn by bus (14), contact box (2), current transformer (4) and earthed switch (5), described contact box (2) also is connected with circuit breaker (1) by bus (14), described bus casing (3), contact box (2), current transformer (4), earthed switch (5), circuit breaker (1) insulation distance each other is greater than 360mm, and bus casing (3), contact box (2), current transformer (4), earthed switch (5), circuit breaker (1) respectively apart from switch cabinet (6) surface insulation apart from greater than 360mm, vertical range between three buses (14) that are connected respectively between described three-phase bus sleeve pipe (3) and the contact box (2) is greater than 360mm, and bus (14) is gone up the specification of busbar smaller or equal to 80 * 10mm.

2. according to the described high-tension switch cabinet of claim 1 with high insulating property, it is characterized in that, bus cover full skirt (7) the height setting straggly on described bus casing (3) surface, creepage distance is 1100mm, the inner surface of described bus casing (3) is provided with gauze screen (9), be provided with shielding conductor (8) in the described bus casing (3), a termination of shielding conductor (8) is arranged on the inside pipe wall of bus casing (3) and with gauze screen (9) and joins.

3. according to the described high-tension switch cabinet of claim 1 with high insulating property, it is characterized in that, contact box full skirt (12) creepage distance of described contact box (2) outer surface is 1100mm, be provided with gauze screen (11) in the described contact box (2), the height that described contact box (2) is gone up insulation lengthening box (10) is 200mm.

4. according to the described high-tension switch cabinet of claim 1, it is characterized in that described current transformer (4) is provided with integral type insulating barrier (13) with high insulating property.