~ 11 May 2010 ~

Location : Prayer Room (male) CMN building PD2

Defect : exhaust fan did not function

- exaust fan is use to absorb hot air in the room to out.

- it cannot function because it did not connect to supply

- no calbe connected to it. supposely, there are cable connect for supply

Location : Generator Transformer 1B

Function GTx : to step-up voltage from 15kV to 275kV

OLTC (on load tap changer) : to change transformer output voltage

Breakdown Voltage (BDV) test

- to check either the oil is good insulator or not.

- in the transformer, oil is use as a insulator.

- test : inject 60kV to the oil

- the oil already put inside the machine

- it has a specific machine for this test

- the test is repeated 5 to 6 times. to get the accurate result.

- gap 2.5mm

oil put inside the white box

~ 10 May 2010 ~

Location : Gas storage building
Defect : CCTV have problem
solution : change with new cctv

Location : GT1B OAP
Work : change contactor
- change contacter in the breaker because the contacter altready broken and overload
- motor protection realy : protect breaker and motor if there is overload, overcurrent

new contactor

contactor had problem

motor protection relay

~ 8 May 2010 ~

Location : Transformer
Work : Generator Tx GT1B and station Tx ST1B servicing works.

Location : Breaker Bus-Tie PD1
Work : Servicing 415V breaker bus-tie
- 425V UAB1A BRD bus-tie
-check continuity = open 99.9 ohms, close = 0.08, 0.07, 0.08, 0.08 ohms
-ohm balance (phase to phase) = cannot short
- servicing 415V UAB1A BRD incoming = 0.22, 0.22, 0.32, 0.32 ohms

Procedure to service breaker bus-tie and incoming.
1. off ATS
2. select local mode
3. rack-out breaker
4. service breaker
5. rack-in breaker
6. reset alarm
7. select remote mode
8. on ATS
9. close bus-tie breaker
10. then incoming breaker will automatically open
11. select local breaker incoming
12. rack-out breaker
13. service breaker
14. rack-in breaker
15. reset alarm
16. select remote
17. close breaker incoming
18. the automatic the bus-tie breaker will open

~ 7 May 2010 ~

Location : HRSG 1A

Work : Control valve ( motorize valve ) cannot open 100%

- use WD 40 to smooth the valve function

- when the valve is close ( zero) it will send red light, if open (100%) send green light (signal).

- use variable resistor to adjust the valve (open/close)

- valve 'berkarat", therefore spray with WD 40

- normally, motorize valve is for isolating

Location : GT Package 1A

Work : Service and clean-up air conditioner

- the air conditioner in the GT Package use 3-phase system. Normally, for house it only use 1-phse.

-clean the air-cond fan (filter)

- if the filter is dirty, it will automatically off (stop)

- the compressor will function after 3 minutes the switch on.

- if in the GT Package already cold, the air cond fan will automatically stop (off)

Location : HRSG 1A

Work : Repair CCTV

- change with new one ( high resolution color cctv camera )

~ 6 May 2010 ~

Location : Battery Room (PD1)

Work : clean-up the battery from dust and check the level of the water in the battery.

- if the water level is too low, under the rate, it have to be top up

Location : Administration Building

Work : pasang and adjust sportlight

~ 5 May 2010 ~

Location : Theaterate

Work : Troubleshoot air-conditioner

- supposely, both motors function for the air cond but only one motor can function. The other one have problem.

- the problem is the connection is wrong and therefore have to change the connection

- compressor 1 (run), compressor 2 ( not run)

the connection

compressor of the air cond

Location : Auxilary transformer

Work : Clean up the transformer

Generator transformer - to step-up the generator voltage of 15kV to the system voltage of 275kV

Station transformer - to step-down the system voltage of 275kV to the station board voltage of 6.6kV

~ 4 May 2010 ~

location : PD2

defect : motor viper extraction cannot stop

location : black start diesel generator (BSDG)

- check battery : 24V DC battery for start up

- use hydrometer to check water level = 1.28

- use multimeter to check the voltage = 12.30V

- the battery have to check because it will be use as back up when do the blackout test this Sunday (9 May)
- battery: back up for NGR (neutral ground resistor)
- EDG (emergency diesel generator) : to energize station essential board and provide emergency AC supply in case of normal AC power supply failure.

6.6kV --> EDG --> step down 415V --> auxilary Tx