3rd WEEK(Ist DAY)

today, we fixed gt2.

this are the step taken by us:

• We open the breaker in 11 kv room, then we check the turbine generator circuit breaker,it was in a good condition
  
  · We check the fuse F1,20A,DC and we figure out it was in good condition.Then we check the relay K84(RELAY CIRCUIT BREAKER CLOSE) and K85(RELAY CIRCUIT BREAKER TRIP & CLOSE ENABLE), CBCS( circuit breaker control switch),K114(RELAY DSM GEN SENSE ENABLE), PT(POWER TRANSFORMER)
  

FIGURE 1:POWER TRANSFORMER

FIGURE 2:GENERATOR CIRCUIT BREAKER 52G

· Check the supply power VDC
· OFF the breaker in transformer panel
GREEN-CLOSE BREAKER”ON”
RED-OPEN”OFF”
· Open AUX TRANSFORMER FUSED SWITCH
· Charged the battery breaker(52G)
· Unfortunately we failed to synchronize the relay after we switch on
· We change 2 new relay for K28(RELAY GTG SYNC ENABLE) and K5

FIGURE 3: RELAY

· We test “ON” but still failed
· We shut down again and check fuse at GENERATOR CURRENT BREAKER CUBICLE,(OK)
FIGURE 4:CHECK FUSE
· From PLC, check TB-B-K27-14 AND TB-B-K27-11(OK)


OVERTIME
· Check forwarding fuel pump lamp no 1 & 2
· Check supply from PLC, if K27 not function means K85 also not function (OK),
· TEST RUN at the synch breaker control “failed”


· Check back K114,25Aand B,7K10,6K10 AND it was “ ok”
· We figure out the problem was actually cause by untight wire at K1(RELAY POSITIVE SHUT DOWN MASTER). After we tight back the wire properly and tested on ,the GT2 start running. GT2 ON AT 11.45