Week #2

The 2nd week was little bit stressful but not like the 1st (*o*). It was within construction week. I’d been gone to many main substations in Putrajaya as well as helping the HR in filing some files during staying in the office. During 2nd week; I’d clarify about some general knowledge with the engineers and technicians so that I can understand about the electrical power major as well as comprehend about the electricity distribution system in both area Putrajaya & Cyberjaya. Here is an example about Low Voltage (LV):-


• 1-Phase, two wires (Small House)
V = 240V P=12KVA (Max. Demand)
I max = 50A (for fuse); usually small house use 30A.

• 3-Phase, Four-Wires (Big House)
V 3-Phase = 415V P=45KVA (Max. Demand)
I max = 62A (for fuse); usually big house use around 60A

• 3-Phase, Four wires (Mall or Very Big Building)
V 3-Phase = 415V P=1000KVA (Max. Demand)
I max = 1391.21A; Note that; we need to use C.T. (Current transformer) for the purpose of step current down!

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In your information; there are a lot of main substations throughout Putrajaya and Cyberjaya. Those substations consist of 33KV step down into 11KV through transformer.

The figure on the left site indicates about the existing 33KV Network at Putrajaya & Cyberjaya.






The picture on the right site indicate about 11KV & 33KV shut down tool and Warning Lift

In the whole general; the main substation are consisting of 3 main room; the Switch Gear room (33KV & 11KV) with RTCC (Remote Tap Changing Control) , Battery Room and Control Room.

The 11KV Switch Gear consis of 2 Feeder, 2 Transformer and Buses

The 33KV Switch Gear consist of 2 feeder, 2 Transformer and Buses.

The RTCC is used for preventing the transformer to flash or to get burnt.

The Battery Room used as feedback supply power

Control Room consist of feedback supply for both Switch Gear 11KV & 33KV

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During Thursday (22/4/2010); I’ve been requested by the Human Resource Department; particularly from Siti Elyana Ashari to attend a seminar called Majlis Pelan Caran Kempen Menana 26 juta Pokok done by YB DATO SRI. DOUGLAS UGGAH EMBAS in presient 4, 62574 Putrajaya. TNBD was involved with other company to farm a tree supporting to that program since the General Manager (GM) MOHAMAD ROSLI HUSSAIN and some TNBD staff was attended during that event. Here is my picture with the GM and TNBD staff (^^);



During Friday (22/4/2010); it’s was a meeting as well as discussing with my host supervisor or my mentor; En.Lokman Bin Yusoff about my Industrial Training Log Book. My mentor checked my log book out and made some comment about it. Besides; he recommended me to study and understand about the Overcurrent and Earth Fault since they are both important for Power System Protection as well as he lends me Power Engineer Guide Book from SIEMENS Company to read further about Power Protection (/^o^\).