Week 2_Power Generation, Transmission, Distribution and Supply

Who operate and control National Grid in Peninsular Malaysia?

• IOI

• TNB

• SYABAS

• NAHRIM

All the above are correct for voltage change in The Typical Electric Power System, except:

• PRIMARY TRANSMISSION: increase to 500kV

• SECONDARY TRANSMISSION: reduce to 33kV

• PRIMARY DISTRIBUTION: increase to 11kV

• SECONDARY DISTRIBUTION: reduce to 415V/240V

All the above are related with Primary Transmission, except:

• Consists of high voltage overhead or underground cable

• consists of transformer that increase to higher voltage

• Consists of large pylon

• Consist of large unipole

All the above are the large heavy industries , except:

• steel mills industry

• food industry

• heavy machinery industry

• automobile industry

All the above are the main components in substation, except:

• Boiler

• Transformers

• Lightning Arrestors

• Oil circuit breakers

What is function of Transformer?

• To supply the heavy consumption of commercial buildings

• To change voltage from one level to another

• To measure electric power qualities flowing in the circuits

• To eliminate lightning from the system

What is function of Oil circuit breakers?

• To supply the heavy consumption of commercial buildings

• To change voltage from one level to another

• To switch in and out the circuits of a system

• To measure electric power qualities flowing in the circuits

What is voltage drop?

• Abnormal low-resistance connection of an electrical circuit

• The electric power transmission network in Malaysia

• The reduction in voltage in the an electrical circuit

• The power will supply to large heavy industries

What is the advantage of single phase sytem?

• The low voltage is less dangerous to consumers

• The connection of loads must be balanced in all phase

• More compact and less costly cause less maintenance.

• Only able to supply limited power demand to consumer

What is the advantage of three phase sytem?

• The low voltage is less dangerous to consumers

• The installation is less costly

• More compact and less costly cause less maintenance.

• Only able to supply limited power demand to consumer