Week 4, 28th April

Today, I followed abang Syahrul to do the HRSG 1&2 local pressure gauge inspection. We were required to take the reading and check for the defects. After finish taking the reading, we found out that blowdown transfer pump 7 pressure gauge is defect. As there is no pressure gauge for range 0-4 bars, replacement will be made when the order arrived.

Abang Azim then explained to me the type of pressure gauge that we used in the plant and its function. The C-type bourden tube pressure tube is used for measuring pressure difference. Then he also explained to me the difference between the gauge pressure, absolute pressure and atmospheric pressure.

C-type bourden tube

Week 4, 27th April

The preventative maintenance that I participated in is steam turbine generator and heat recovery steam generator (HRSG) 1&2 motorized actuators inspection. We need to check the feedback availability whether it is close or open and check for the defects.

The actuators that used in the plant mostly is limitorque L120 series actuators. It can be used to control butterfly, ball, and plug valves which requires 90 degrees movement.

motorized actuator

Week 4, 26th April

The 2 PMs that required to do are fire fighting tank and distillate tank transmitter inspection and turbine flow meter inspection. This is the first job I participated in for control and instrumentation section.

For the fire fighting tank and distillate tank transmitter inspection, I followed Mr. Tai, CNI technician, to take the reading for fire tank A and B from the level transmitter. Same process applied to the distillate tank.

For the turbine flow meter inspection, I followed abang Syahrul to take the flow meter reading for steam turbine. Besides that, we also checked whether it need for lubrication or not.

During the free time, Mr. Tai explained to me that AT-1000 series transmitter is designed to attach to the LT-LTC series level gauge. One of its main function is to convert the level gauge’s signal into voltage and electric current to perform tank inventory management.

AT 1000 series transmitter that attach to the LT-LTC series level gauge

Week 3, 23rd April

Today, i have also been exposed to a new task, which is unloading. Unloading in power plant means to fill up the distillate that have been used for power generation purpose and the minimum level of the distillate storage in the tank must be 70 % from the maximum. The tanker will come to the power station and the distillate will have to be checked before it's being filled.

For my first time, i have the chance to have a close look about the tanker and finally i know the tanker is not what i think all the time. The big tank is actually divide it into a few compartment and then i climb up top to take a look for every compartment. The sample of every compartment will be taken in which will used to determine the purity and density of it.

As the unloading process was going, i was being explained by the person in charge to know further about the machine that we will use for the whole process.

The worker is unlocking the lock

Abang Yukaimi is taking the sample of distillate oil for every compartment

The purity and density of distillate oil is being tested for every compartment

The unloading of distillate oil starts

Week 3, 22nd April

The whole day spent on connecting the ventilation fan motor for gas turbine hall. It was a suffering work as u need to do it under the hot sun as it is at the roof and the heat that come from the gas turbine. We able to finish connect 4 out of 5 of the motors as the heat that generate from gas turbine make us feel uncomfortable and slow down the process.

Abang Razak is connecting the wires for the motor

Week 3, 21st April

The 2 CMs (corrective maintenance) that do today is drum screen wash pump motor and lighting system in gas turbine. For drum screen wash pump motor, it is stated that current is hunting, means unstable. A free run test is done and the motor is functioned. Hence, further checking is required. For lighting system, we were required to do the functionality test or troubleshoot to check what is defect.

In the evening, we had done the BOP (balance of plant) motors PM inspection. We were required to take the reading of the motor’s temperature and bearing vibration. The motors that we inspect are service water make up pump motor, demineralized water transfer pump and sea water booster pump.

Sea water booster pump motor

Demineralized water transfer pump motor

Week 3, 20th April

Due to the request from the admin staff, we were required to install a new fax cable line at the admin office. The wire goes through from the ceiling of the admin office and reaches the connection point. The connection of the wire must do carefully as the wire is life.

In the evening, I and abang Fadzli checked the transducer in the power transformer as the reading of the measurement is out of range. After a round of checking, we found out that the problem is the transducer problem. A new transducer will be replaced when the ordered transducer reached. Other that involve is Mr. Tai, control and instrumental technician.

Tap changer for a power transformer