Wednesday, May 2, 2012

BREAKERS RATINGS


230kV GIS BREAKER

1. Nominal system
voltage = 230kV
2. Maximum system voltage = 242 kV
3. Maximum system voltage = 253 kV for 30 mim
4. Rated continuous current = 3150 A for Bus couppler
5.Rated continuous current = 2500 A for I/C & O/G feeders
6. Rated system short circuit interrupting current of the CB = 63kA

34.5kV BREAKER

1. Nominal system voltage = 34.5 kV
2. Maximum system voltage = 36.2 kV
3. Maximum system voltage = 38 kV for 30 mim
4. Rated continuous current = 2500 A for Bus Tie & Incomer
5.Rated continuous current = 1250 A for O/G feeders
6. Rated system short circuit interrupting current of the CB = 31.5 kA

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THIS IS SIVA T&C ENGINEER IN NCC LTD - SAUDI.