week 11

14/6/2010 - 18/6/2010

1. Help En. Hafiz updated ERMS data and other works.

week 10

7/6/2010 - 11/6/2010

1. Mostly help En. Hafiz updated the data at office.
2.Mostly preventive shutdown was held during night .

(8.6.2010)

1.Follow team project off to shutdown at Perindustrian Nusa Cemerlang. This project is to create new supply at the new substation ( P/E Tong Garden )
2. Create loop in and loop out works at the new substation.
3. make a direct connection for incoming and outgoing cable.
4. resistance used to obtain the correct phase sequence. (R=10 ohm , Y= 0 ohm , B= 1 ohm )


























(10.6.2010)

1. Went to Taman Setanggi today because there was three feeder pillar ( fp No.9, No.10, No. 11 ) which have been broken and was stolen. Things that have been stolen was busbar and link unit and cause interference to the customer.
2. Before repair the feeder pillar, the main supply from P/E Taman Setanggi No.3 was off.
3. The total loss for the three feeder pillar is around RM18,000. 4. Learn how to install meter box at Taman Setanggi. the meter was single phase meter.





























4. Off to P/E Taman Damai Jaya, to detect the cause of failure.After checking the fuse and still cannot find the cause of failure, the job was assigned to fault finder team.


5. Around 4 pm, breakdown project at P/E Bayu Puteri No.3. The cause of failure was at the switchgear. The bushing at switchgear got contact with earth and created spark ( heat ) and that make the bushing explode. Generator set was used to gave supply to the customer so that the customer will not affected by the maintainance works.

week 9

1/6/2010

1. morning briefing by En. Hafiz
2. went to PMU, PPU to take load reading
i. PMU Tanjung Kupang
ii. PPU Gelang Patah
iii.PPU Taman Tun Aminah
iv.PMU Taman Perling

The purpose of taking load reading is to record the reading load for monitoring the load that have been used. The load reading was taken around 10am or 8pm because that time is peak load.

2/6/2010

1. Morning briefing.
2.Preventive shutdown at P/E LPN, Kempas ( outdoor ) . The shutdown was held for maintenance of switch gear and transformer.

31

Morning assembly and briefing by Hj. Kamim and En. Ismail. After that off to P/E Rumah Kedai Jalan Kuning to clean up the substation.

Type transformer:

1.current transformer
2.potential transformer
3.power transformer
4.Distribution transformer

Site visit at PMU Stulang Darat 132kv

30

Today we had technical sport event at yard kempas.The event started around 10am after the vip came for the opening ceremony.

the sports included:
1.pole dressing
2.jointing
3.staywire
4.service cable
5.fire fighting
6.switching
7.locating cable fault

29

oil switch gear:

1. TAMCO
2.Long and Crowford
3.ABB
4.Rayroll

Gas switch gear :
1. VEI
2.Siemen
3.Merlin Gerlin
4.FnG
5.Falcon Beta

28.

Today we have another assembly. En. Zaini Raya ( Pengurus Kawasan ) and En. Mohmad ( Jurutera Kanan Pembinaan dan Servis ) was also here this morning. The assembly is regarding the technical sports ( sukan teknikal) that will be organized by TNB Pasir Gudang this year but will be held at yard Kempas, Johor Bahru. The assembly is to announce the lists of participants that will participate in technical sports later on Thursday.

After that, we have a shut down project at P/E Taman Kenanga No.2 and No.3 for preventive works.


Preventive Procedure

1. The monthly shutdown schedule was prepared and submit to RCC ( regional control center ) two month before.

2. Submit the actual shutdown schedule to RCC a month before.

3. After getting an approval from RCC, they will key in the data in online shutdown management system to print out the notices for consumer.

4. Sent the notice to consumer to let them know there will be no electricity supply during this time.

5.The authorized person (AP) will request a permission from controller for the shutdown process.

6.RCC will issue authorization to AP.

7. For safety , AP will issue a SKMK ( Sijil Kebenaran Melakukan Kerja ) or PTW ( Permit To Work ) to CP.

8. Started the preventive works.

9. CP ( competence person) will canceled the PTW and submitted to AP.

10. AP will canceled the Autorization that given by RCC.

11.Start switching again

12. After everything was back to normal ( electric supply was back again ) informed RCC.









first step to do before clean and check the RMU / switchgear, earth the cable. this is for safety purposes.






































if the white color change to red, that means the Tx ( transformer) was not in good condition because have air inside the Tx.



















the red things inside the OLU is bushing. three phase, red yellow blue.






























there a a few types of switchgear:

1. Long and Crowford (oil)
2.VEI
3.Tamco (oil)
4.Rellroll (oil)
5.Siemen
6.Merlin Gerin
7.Lucy
8.FMG
9.Falcon Beta






















Tx birth certificate :)

DYN 11 means Delta Star Neutral. 11 means Voltage more than current. ( current lagging ).



















tap changer (load)

Two types : 1. offload tap changer ( have to turn off the supply before change it manualy ) 2. Onload tap changer ( automatically changed. this is for Power transformer)



















There are 2 types of Tx: 1.Hermetical seal transformer ( from the pic left) 2. Conservative tank transformer


























current transformer






















this is for load record. when there is load, the black needle will push up the red needle. when there is no load, the black one (current load) will back to its original position but the red one( maximum load) will stay at its place.





























Right angle bushing ( for HFU )


















Inline bushing ( for OLU )

27.

Today is the eighth weeks of my internship. Every Monday we will have assembly in front of the main building. As you can see before my schedule during internship, i suppose to be under street lighting unit until end of this week, however i decided to join substation unit earlier because there is a lot i have to learn under substation unit. So, today i report duty to En. Hamid ( AP ) and accompanied him to to do switching (turn off the electricity supply) at Horizon Hill for maintenance job.

cleaning the breaker.

26

Today after the morning briefing, everybody was going to finish their paper work. So today, no outside job. I just sat at the office and finished my log book. After asking a permission from one of the person in charge of wagon, i got my chance to ride the wagon and stand inside the wagon's basket :D

the height is more than 9 meter.
































this is awesome! XD

25.

Today after the morning briefing by En. Norakmal, i accompanied SAVR team to one big project that include many people at Kampung Bakar Batu. The project is to cut the electricity supply for a few houses that does not have land grant which owned by mostly Indonesian. The government want to demolish the houses regarding to a highway project or to create a new route. I am not sure about this. This is quite sad because they are poor but we (TNB) have to do our job. We cut the electricity supply after the houses was comfirmed to be demolished.Today they will demolished only eight houses. However, government is not the one to be blame because they got the notice to clear the house since last year and again the government send them a new notices 3 month before they demolished the houses.

there was a lot of people. RELA, Police, MPJB and also the villagers.










































cut the electricity supply




















cut the overhead cable to the houses.

24.

After morning briefing, i accompanied En. Zul and En. Wan, both of them is street lighting's technician to to their job. They actually in a standby mode which they have to finish the job ( on the spot ) that the consumer asked to or if anything bad happened that involved consumer's right regardless of time.

En. Wan taught me a lots.

There was a few types of light:

1.400w ( highway or federal )
2.150w ( main road )
3.100w/70w ( lanes , 70w is old light system for lanes)

there is a few system for street lighting:
1. Panel controlled -MPJB
- MPJBT
2. Owner - at their house. there will be charge - RM10 ( 150w )
- RM 7 ( 70w )
3. KPLB ( kemajuan pembangunan luar bandar ) - kampung
4.LJK ( Lampu Jalan Kampung )

both KPLB and LJK was paid by government.

there is two type of street lighting pole. one is galvanised and the other one is spun concrete pole. If you see the galvanised pole, that one is not tnb's street lighting pole. That one was maintained by JKR or MPJB.

The distance between street lighting pole and another was 25 meter. The height was 9 meter. is the higher than overhead cable which was 7.5 meter ( SAVR ) .

There is a few brand for street lighting (TNB) :
1. Muarlite
2. Permintex
3.Amat Sinar (known as ASL)


After that, we went to Taman Tun Aminah to see the traffic light that have problems. TNB is not in charge for traffic light but TNB is giving them a supply. Since the traffic light is not working so there must be a problems regarding the supply.

after checking the current and everything was okey at the panel, mybe there was something wrong with the IPC. So they change the IPC and everything turns to be normal again. Sometimes the IPC is broken or loose until not touching the cabel.

23

A usual, a morning briefing is a must :) Today i accompanied Project's team off to shut down project at Taman . I got to see the jointer gang where they joined the cable at joint pit. Unfortunately, after a few hours waiting, the shut down project have to be delayed since there was another work have to be done first. They send me home and they continued the shut down project at night.

22.

Today is my seventh week of practical training. I was under Street Lighting's team starting from today. It was very interesting when you will be learning about street lighting where before this you do not think about it at all. I report duty to En. Shafei'e Harun. There was 7 team of street lighting unit.


this is the street light

























choke














The street light have three types:
1. 100w
2.150w ( bigger bulb )
3.70w


Nowadays, most of the street light using photocell to manage the lights. A photocell is a type of resistor. When light strikes the cell, it allows current to flow more freely. When dark, its resistance increases dramatically. Photocells need some calibration to be responsive in the exact lighting scenario you have. They can be used to detect large or small fluctuations in light levels to distinguish between one light bulb and two, direct sunlight and total darkness, or anything in
between.





the photocell was placed at the panel, pole or sometimes at the bracket itself































the component inside the light is:
1. choke ( no neutral )
2.capacitor / lighter / starter ( have neutral )



























The component that often broken or damaged is the lighter. The choke was rarely broken. The damage was usually caused by lightning. But when it was strike by lightning not only the lighter was broken but other component such as bulb also will be damaged. The IPC for street lighting also always damaged.

The wire that we have been used for street lighting is 185/95mmp.



this is the panel.



















































this is the street lighting panel























monkey box ( peti monyet) because it was hanging on the pole.


































The cutout always broken or burning and will be melting, so nowadays they replace the cutout with black box since black box ( 160A ) is more durable.the fuse for the black box is 125A.

21.

Today we have one job to do for consumer. It was at Taman Permatang Kempas, where the overhead cable was sagging and almost fell down infront of their house. It is very dangerous if we let it be like that. We have to pull it back to the original place to prevent from something bad happened.

Firstly, one rope was tied to the sagging cable. One worker ( En. Azmi ) have to be up to tie the rope to the cable. After that, En. Asmawi and En. Shahrin pulled the rope to reduce sagging. After they pulled the rope and the cable was back at it original placed, En. Azmi change a new DEC ( dead end clamp ) for the cable.

20.

Today, in the morning we have a Solat Hajat ceremony at the Kempas Quarters. This is to reduce a breakdown problems in Johor Bahru because Johor Bahru have a quite high ranking for breakdown problems.

After that, we carried out patrols in our area which is near Kempas itself. We went to Jalan Bandaran Utama, Jalan Banjaran 3, Jalan Banjaran 4. We also went to look at the placed where we have to do maintance job for tomorrow. The place that will be involved is Jalan Bukit Mewah 4/5, 4/6, 4/7, 4/8, 4/9.

thats all for today :)

19.

As usual, morning roll call and briefing from En. Norakmal.. After, went to Setia Tropika to do paid work ( kerja-kerja yang dibayar ) to resite the five foot way and meter box because the owner extend the house, so have to resite the cables and meter box.

The first step is, we have to switch off the supply by pull out the fuse at black box. Second step is we have to take out the existing connection and also the meter box. The team will discussed about the new connection and where to place the meter.










































Third step is we placed the cable holder to the wall, placed the new cable on the cable holder ( one black box give supply to 3 unit houses, so the connection connect to 3 house)




























Forth step is we have to cut the cable based on measuring. The cable is cut into 4 pieces for three phase system. The existence connection will be marked with tape.

Next, the cable will be placed on the cable holder and clip was used to hold the cable at its place. After that, En. Shahrin join the existing cable connection with new connection using junction box. In this case, two junction box have been used since the house used three phase system.






























The junction box was used to do connection between cable and also to avoid the phase cable from touching each other ( the connection part) because if the connection part of different phase touching each other the system may collapse.

18

Today is my second week under SAVR team. Today we went again to Taman Munsyi Ibrahim. Our team have to extend a connection from main to the black box. It was done as a standby system if in case it is over load.

Cable ABC 3x195mm2 have been used for this system. For each cable, one to three, we have to mark the cable using tape referred to the phase of the system. the forth cable is neutral cable. For neutral cable, the diameter is smaller than other cable. The numbering is done to make sure the connection is correct after we cut out the cable. Each cable have their owned number but the number is too small. Thats why, we have to mark it with tape to make things easier for connection purposes. We have to connect the cable correctly to prevent electrical component for house or system that used three phase system from damaged. If it is connect not in order, the electrical equipment such as air conditioner ( or anything that run by motor ) will easily damaged because the motor will rotate anti-clockwise and cause heat. From time to time, the equipment will blow.

ipc - insulated piercing connector
this is for cable 185mm2-120mm2 ( for main )
and 185mm2-70mm2 ( for tap )








ipc is the one that connect cable with another cable.






























































after we have to pull out the support pole and the pole. this job takes around 20 minutes :)

17

Today we have one job at Taman Munsyi Ibrahim. We want to connect cables to the black box so that if something happened to the cables, we don't have to check from the abc cables, we just checked it from the black box.

termination kit





















the heat shrinkable termination process


















installing the black box.
black box used is 160A.