Week 2 (Day 2)

- Attend the meeting which held every morning at 8am by team pencawang
- Today, we are going to do earthing at P/E Sungai Gau.
- Before that, we have to shut down P/E Simpang Caruk Puting and P/E Sungai Gau.
- The process of shutting down P/E Simpang Caruk Puting and P/E Sungai Gau will caused blackout to the consumer who live around Simpang Caruk Puting and Sungai Gau.
- To make sure the electricity supplied to consumer won't be interrupted, we have to on (closed circuit) normal off point (NOP) at P/E simpang pulai.
- It means that the P/E simpang pulai will temporary supply electricity to consumer who live around Simpang Caruk Puting and Sungai Gau.
- Then, we can start doing earthing at P/E Sungai Gau.

- The copper cables have been stolen. We are here to reconnect the copper cables.

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 IPC ( Isolated Piercing Connector)

- Connect cable to cable 

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schematic diagram KG AWAH

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-In order to prevent damage, each station along the network is protected with circuit breakers or fuses which will turn off power in the event of a short circuit. 

- Auto Recloser is a circuit breaker equipped with a mechanism that can automatically close the breaker after it has been opened due to a fault. ---

- Reclosers are used on overhead distribution systems to detect and interrupt momentary faults. 

-The control system for a recloser allows a selected number of attempts to restore service after adjustable time delays. 

-For example a recloser have 3 "fast" reclose operations with a few seconds delay, then a longer delay and one reclose; if the last attempt is not successful, the recloser will lock out and require human intervention to reset. 

Week 2 (Day 1)

- Attend TNB stuff gathering which held every monday at 8am.

- I introduced myself as a trainee in front of all the stuff TNB Temerloh.

- After the meeting, I followed team pencawang to stor pencawang.

- After this, we heading to Stesen Suis  Maxis at lanchang,pahang.

- Stesen Suis Maxis used to connect one substation to another substation. 

- It is same as P/E, the difference is stesen suis dont have transformer.

- Normally Stesen Suis Maxis located at non housing area.

- We are here to replace the new cable because we got report that the cable has been stolen.

 

- After finish replacing cable, we go to P/E KG PUNJONG.

-In this P/E, the transformer is not connected to feeder piller but a black box.

- The black box has the same function as the feeder piller.

- The difference is the feeder piller mostly used in housing area while black box mostly used in non-housing area.

- The cost for black box is cheaper.

- En. Zahhari explained to me the four important step to shut down a P/E 

1) Matikan (push to trip Circuit breaker)

2) Asingkan ( earth switch push to right)

3) Buktikan Mati (test on transformer)

4) Bumikan (Earth ON)

- After doing all the maintainence job, make sure we EARTH OFF it.

- Then, we go to SSU Lanchang.

- Battery (30V) for SSU

- Battery (110V) for PMU and PPU

- Battery is used to supply electricity to Switch gear (from transformer)

- When the main P/E having fault and cause breakdown,the other two P/E will be affected (break down),then bus station will switch on. 

- Then other two P/E will recover from breakdown but the main P/E still in break down condition.

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- When customer complain (the light blinking),the possible condition is the transformer voltage drop.

- To solve it , We adjust the OLTC (off load tab changer) manually  to increase the voltage.

-off load tab changer for every substation except PPU

- PPU using on load tab changer (Automatically adjusted)

There are 3 main things we need to understand; generation,transmission and distribution.

the function of the generation is to provide total power needed.they are connected at common point called bus.

while transmission is important to transfer electric energy from generating units at various location to distribution system which ultimately supplies the load.

next is the distribution part, which connects the distribution substations to consumer's service-entrance equipment.

Week 1 (Day 5)

- Today, I sit in the office and Encik Zahhari (Ketua Pasukan Pencawang) give me an infrared survey report.
- He asked me to read the report and figure it out.
- I learned how to differentiate from the infrared picture whether there are problem occur at the compartment/equipment.


Condition Monitoring System

-Before the problem or accident happen (i.e Flash Over), the best way (least-cost approach) is to monitor the condition of the substation.
The condition of substation can be monitor using Infrared technology.
Infrared technology:
- Service provider could asses the condition of the electrical power equipment under 'live condition'.

-This is very important as the infrared scanning operation will not disrupt the present supply of electricity to the respective clients.

The Basic Principle

1. Each object has its own 'heat capability'.
2. When the object is worm/hot, it produces radiation.
3. The radiation can be quantified in term of frequency.
4. The object is hotter ~ the higher the radiation~the higher the frequency intensity.
5. This frequency - detected by infrared sensor and sends the data over the infrared system processor.
6. The infrared system processor will subsequently process the data and projecting an infrared image on the screen.

 

CONDITION 1 :  On Monitoring




CONDITION 2 : On Monitoring

CONDITION 3 : Further Investigation