Vacuum Circuit Breaker Series
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12kV permanent-magnet vacuum circuit breaker
Vacuum Circuit Breaker Series
12kV permanent-magnet vacuum circuit breaker is used in various types of substations in power system and power generators, electrified railway, city subway, municipal construction, port construction, transportation, metallurgy and other applications three-phase AC 50Hz and rated voltage of 3-10kV.
12kV permanent-magnet vacuum circuit breaker is used in various types of substations in power system and power generators, electrified railway, city subway, municipal construction, port construction, transportation, metallurgy and other applications three-phase AC 50Hz and rated voltage of 3-10kV. It can be interchangeable used with the existing vacuum circuit breaker of the the same level of operating mechanism. The whole machine adopts the whole insulation and integrated structural design. The service life can be over 100,000 times. It also meets relevant technical standards including GB1984, GB/T11022 and IEC60694.

S/N

Item

Unit

Parameters

1

Rated voltage

kV

12

2

Rated current 

 A

630, 1250, 1600, 2000, 2500, 3150, 4000

3

rated power-frequency

Hz

50

4

Rated short-circuit open current

kA

31.5, 40

5

Rated short-circuit closing current (peak)

kA

63, 80, 100

6

Rated short-time withstand current (4 s)   

kA

25, 31.5, 40

7

Rated peak withstand current

kA

63, 80, 100

8

Insulation levels

power-frequency withstand voltage (1min)

kA

42

lightning impulse withstand voltage (peak)

75

9

Rated operation sequence

O-0.3s-CO-180s-CO

10

Mechanical life

times

100000

1. Bistable state permanent magnetic actuator is provided, which overcomes the inherent disadvantages of traditional electromagnetic mechanism and spring mechanism, realizes perfect combination of mechanism operating characteristics and vacuum arc extinguishing characteristics, eliminating wearable stored energy and lock mechanical device in traditional mechanism, characterized by small quantity of parts, simple operating procedures, long mechanical life, high reliability and maintenance-free.

 

2. This circuit breaker can be used for frequent operation and has multiple breaking ability.
 
3. This circuit breaker offers flexible installation modes. It can be installed as a fixed unit or as a handcart on a chassis.