TNB's Term For Newbies

For those who are newbies with working related with Tenaga Nasional Berhad, this are few technical term that commonly used.

No.	Term	Definition
1	Transmission Facility	The transmision substation and/or line cable equipment (66kV and above) or part thereof. It shall also include the distribution equipment in the transmission substation.
2	Site Acceptance Test (SAT)	Pre-commissioning test performed on the transmission facility before PIAT
3	Pre-commissioning Inspection and Testing (PIAT)	Quality Assessment activity performed by PCU after the successful completion of SAT to determine the readiness of the Transmission Facility to be energised.
4	Primary Injection	Testing by means of injecting current into the primary circuit to verify the CT Ratio, CT Polarity and the CT secondary circuits. It is not being considered as a stability test.
5	Stability Test	It is the test to asess unit protection as a complete scheme thatremain unstable for all out-zone faults and operate only for in-zone faults.
6	Unit Protection	Protection system with a clearly defined zone of protection and it is usually demarcated betwenn 2 or more sets of CT's.
7	On-Load Test	It is the test  or measurement for by means of using the energised secondary voltage and secondary load current after a circuit has been energised.
8	Live Plant	A fenced area with energised high voltage equipments.
9	Live Bay	A transformer, line/cable, bus coupler or bus section bay that being energised at high voltage. Since the word is "LIVE", those equipments basically is not isolated or earthed.
10	Electrical Service Engineer	A person who being certified by Energy Commission to carry-out the work.
11	PTT	Protection, Telecommunication & Telecontrol Department in TNB Transmission Division.