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Resistors

The distribut...

Question

The distribution system indicated below is to be protected with over current protection. Identify the locations where essentially directional over current relays will be required considering proper fault discrimination.

A

Br-2, Br -3, Br -5 and Br -6

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B

Br-1, Br -4, Br -7 , Br -5

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C

Br-2, Br -3, Br -6

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D

Br-1, Br -4, Br -8 and Br -7

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Solution

The correct option is C Br-2, Br -3, Br -6
Directional relays are not required at supply side and load side because power flow is unidirectional.

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