Vacuum Circuit Breaker Series
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40.5kV permanent-magnet vacuum circuit breaker
Vacuum Circuit Breaker Series
40.5kV permanent-magnet vacuum circuit breaker is used in various types of substations in power system and power generators,
40.5kV 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 35kV and can make, carry and break current under normal circuit condition and make, carry and break current for switches under abnormal circuit condition within a specified time. The service life can be over 60,000 times as a whole and can be maintenance-free for a long term. It also meets relevant technical standards including GB1984, GB/T11022 and IEC60694.

S/N

Item

Unit

Parametars

1

Rated voltage

kV

40.5

2

Rated current 

 A

630, 125, 1600, 2000, 2500,

3

rated power-frequency

Hz

50

4

Rated short-circuit open current

kA

25, 31.5

5

Rated short-circuit closing current (peak)

kA

63, 80

6

Rated short-time withstand current (4 s)  

kA

25, 31.5

7

Rated short circuit current breaking times

times

30

8

Rated peak withstand current

kA

63, 80

9

Insulation levels

power-frequency withstand voltage (1min) (phase-to-ground, phase-to-phase and phase-to-fracture

kA

95/118

lightning impulse withstand voltage (peak) (phase-to-ground, phase-to-phase and phase-to-fracture)

185/215

10

Rated operation sequence

O-0.3s-CO-180s-CO

11

Mechanical life

times

60000

1. Permanent-magnet operating mechanism, vertical distribution, reasonable loading. Characterized by long mechanical life, high performance reliability and little maintenance.
 
2. A new embedded terminal post is adopted with high insulation strength, anti-condensation and pollution characteristics.
 
3. Screw propulsion structure is adopted for the handcart. The screw can trip automatically, realizing accurate positioning.