Generator Protection Circuit Breaker GCB

Generator Breaker Set

Rated System Source Short-circuit Breaking Current kA

Rated Generator Source Short-circuit Breaking Current kA

Low Frequency Breaking Current kA

Total Breaking Time ms

Disconnector/Grounding Switch Rated Closing/Opening Time S

Rated Short-circuit Making Current (Peak) kA

Rated Short-time Withstand Current / Duration kA/s

Rated Peak Withstand Current kA

Rated Current A

Mechanical Operations Times

Electrical Life Times

Remarks

190kA

195 DC component 85%

135 DC component 130%

/

≤70

≤4

535

210/3

600

40000 forced air cooling

Circuit breaker 6000 disconnector/grounding switch 10000

4

For nuclear power

170kA

170 DC component 91%

135 DC component 130%

/

≤70

≤4

466

210/3

600

27000 natural cooling 28000 forced air cooling 40000 IPB cooling

Circuit breaker 6000 disconnector/grounding switch 10000

5

160kA

160 DC component 86%

130 DC component 130%

/

≤70

≤4

440

Main circuit 160/2 grounding circuit 160/1

440

25000 natural cooling 27000 forced air cooling

Circuit breaker 5000 disconnector/grounding switch 10000

3 (test report)
6 (calculation report)

100kA

100 DC component 82%

80 DC component 110%

/

≤60

≤4

275

100/3

300

15000 natural cooling

20000

8

100kA

100 DC component 82%

80 DC component 110%

55(20~45Hz)

≤60

≤4

275

100/3

300

16500 natural cooling

20000

8

For pumped storage

Main circuit 100/3 starting/dragging switch circuit 160/3

Main circuit 300 starting/dragging switch circuit 480

Main circuit 16500 natural cooling starting/dragging switch 4000

Circuit breaker/grounding switch 20000 starting/dragging switch 10000

100kA

100 DC component 82%

80 DC component 110%

/

≤60

≤4

275

Main circuit 130/3 starting disconnector 100/3

Main circuit 390 starting disconnector 300

18000 natural cooling starting disconnector 4000

20000

8

For gas turbine