WorksheetsPOWER SYSTEM
Total questions: 13
Worksheet time: 7mins
How many and what types of substations are included in the Shah Alam Line's 132kV Bulk Supply System?
2 BSS, 1 SSU, 18 TPSS, 7 RS, 2 LVSS
3 BSS, 2 SSU, 16 TPSS, 5 RS, 3 LVSS
2 BSS, 1 SSU, 20 TPSS, 6 RS, 2 LVSS
1 BSS, 1 SSU, 18 TPSS, 7 RS, 2 LVSS
Under which condition will the No-Volt Automatic Changeover (NVAC) Scheme be initiated?
When total power loss occurs at BSS or SSU
During any minor voltage fluctuation in the 33kV system
Under single failure condition of BSS equipment or outgoing feeder to 33kV network at BSS
When power supply increases above 110% of nominal voltage
Which of the following statements about the NVAC Scheme is true?
NVAC will be triggered during total power loss at the BSS
NVAC will automatically restore power through permanent genset
NVAC operates through manually controlled switches only
NVAC will not initiate if power drops below 50% for less than 3 seconds
What is the main function of the Load Break Switch?
To increase power supply
To monitor voltage levels
To provide emergency power
To connect or isolate two power rail sections
What happens when a BLS plunger is activated?
It sends a wireless signal to the station operator for manual shutdown
It energizes the 110V DC trip circuit to open the BLS door
It cuts off the 110V DC trip circuit and triggers the BLRP to trip the DC Feeder Breaker
It automatically resets the BLS and re-energizes the power rail
Which of the following signals are sent from the BLS to SCADA?
BLS Temperature Alarm and BLS Maintenance Status
BLS Tripping Signal and BLS Door Open
BLS Reset Confirmation and BLS Voltage Status
BLS Activation Timer and BLS Location Update
What are the requirements that must be fulfilled in order to close a CIS?
Bustie closed
F1 and F2 closed
F1 and F3 closed
F2 and F4 closed
How many types of Traction Power Substations (TPSS) are there in the Shah Alam Line?
5
9
2
8
Where is the Line Test Device (LTD) located?
HSCB Rectifier Trolley Breaker
HSCB Trolley Positive Breaker
HSCB Trolley Negative Breaker
CIS Trolley
How many types of HSCB (High-Speed Circuit Breaker) are there, and where are they located?
1 type – UR60 only, located at all HSCB breaker
2 types – UR40 at all feeder and inverter breaker, UR60 at rectifier breaker and bustie
2 types – UR40 at Rectifier breaker and bustie and UR60 at all feeder and inverter breaker
3 types – UR20, UR40, and UR60 at all feeder
What is the resistance value (in ohms) of the Neutral Earthing Resistor (NER)?
26 ohms
30 ohms
27 ohms
24 ohms
What is the minimum voltage for earthing switch to LED "permit to operate" appear?
110VDC
85VDC
50VDC
0VDC
Who is Line Coordinator For East PM/CM?
En Hanif
Pn Asiah
En Akmal
En Hazziq
