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Middle Voltage Vacuum Circuit Breaker

Middle Voltage Vacuum Circuit Breaker
Middle Voltage Vacuum Circuit Breaker
Offer Type: Sell
Offer Post Time: 2009-03-02
Expiration Date: 2010-02-01
Details: VA (ZN63A) Vacuum circuit breaker adopts full-sealed insulating construction. Its main insulating cylinders have crinolines in and out of the cylinders so that Elec. Creeping distance is meeting with requirements of DL standard. The breaker has small mass, reliable insulation, no pollution, stable operating performances, high technical parameters and long maintenance period.

Functional unit of draw-out trucks
Functional unit of draw-out truck for switchgear: Isolating truck, voltage transformer truck(2PT & 3PT), current transformer truck(2CT & 3CT), Fuse truck and grounding truck, and so on.

Applied standards and codes
The circuit breaker meets of GB1984-89; <3.6~40.5KV AC. Indoor vacuum breaker> of JB3855-1996; of DL/T403-1999 and relative requirements of IEC56-87 standards.

Main size and technical parameters

1. Rated voltage  KV  12
2. Rated short time power frequency withstand voltage (1min. ) 42KV
3. Rated lightning impulse withstand voltage (Peak): 75KV
4. Rated frequency  Hz  50
14. Open time (Under rated voltage)  ms  20~50
15. Close time (Under rated voltage)    35~70
16. Mechanical life  OPS  20000
17. Breakings under rated current    20000
18. Makings under rated current    50 (40KA=30)
19. Permitted worn thick of moving and fixed contacts.  mm  3
20. Rated closing operation voltage  V  AC. 110/220; DC. 110/220
21. Rated breaking operation voltage    
22. Rated voltage of energy-store motor  V  AC. 110/220; DC. 110/220
23. Power of energy-store motor  W  80
24. Time of storing energy  S  ¡Ü15
25. Travel distance  Mm  11
26. Contacts' closing jump-time  Ms  ¡Ü2
27. Asynchronism of closing and opening    ¡Ü2
28. Average breaking speed (6mm-open)  m/s  0.9~1.2
29. Average closing speed (6mm-close)    0.5~0.8
30. Rebound margin of breaking contacts  mm  ¡Ü3
31. Resistance of main circuit  um  ¡Ü50 (630A); ¡Ü45 (1250A)
¡Ü35 (1600~2000A); ¡Ü25 (2500A ~4000A)

32. Contacting pressure of closed contacts  N  2400± 200(25KA); 3100± 200(31.5KA);
4250± 250(40KA)
33. Rated operation sequence    O-0.3S-CO-180S-CO
* Note: The breaker with current over 4000A shall be equipped with cooling fan.

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