b)

0)
17 a)

b)

03000EE301092001

What are the causes of over voltages arising on a power system?
Explain the term insulation co ordination.

Draw a neat sketch of an induction disc relay and explain its construction and
operation.

A ‏عل‎ two wire distributor AB of 300m long is fed at both ends A and 8. It
supplies uniformly distributed load of 0.15A/m and concentrated loads of 50A,
60A and 40A at distances of 75m, 175m and 225m respectively from the end
A. The potentials of feeding points A and B are 206 V and 200 V respectively.
The resistance of each wire is 0.00015 ohm/m. Find the currents fed at points A

and B.

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