Which among the following is the standard voltage used for primary distribution?

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ALP CBT 2 Electrician Previous Paper: Held on 22 Jan 2019 Shift 1
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  1. 1 kV
  2. 8 kV
  3. 15 kV
  4. 11 kV

Answer (Detailed Solution Below)

Option 4 : 11 kV
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Detailed Solution

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Transmission lines and distribution lines can be discriminated by their operating voltage. The voltage levels of transmission and distribution are given below.

Power carrying system

Voltage level

Primary transmission

66 kV, 132 kV, 220 kV or 400 kV

Secondary transmission

33 kV

Primary distribution

11 kV

Secondary distribution

400 V

 

Important Points:

The differences between transmission and distribution lines are given below.

Transmission line

Distribution lines

It helps in the movement of electricity from the power plant to the substations

It carries electricity from the substation to the consumer’s end

It carries electricity in three-phase supply system

It requires a single-phase supply system for carrying electricity

Carries electricity at a very high voltage

It carries electricity at a very low and safe level

These are thick lines

These are thin as compared to the transmission line

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