Virtual Labs

A circuit breaker is an automatically operated electrical switch designed to protect an electrical circuit from damage caused by ________ function of __________ is to isolate the part of the power system in case of abnormal conditions.

a: Overhead Explanation

Explanation

b: Short circuit Explanation

Explanation

c: Both overhead and short circuit Explanation

Explanation

d: None Explanation

Explanation

The important characteristics of the fluid used in CB are _______

a: It should have good thermal and chemical stability Explanation

Explanation

b: It should have high dielectric strength and are extinguish ability Explanation

Explanation

c: Non- inflammability and high thermal conductivity Explanation

Explanation

d: All Explanation

Explanation

The advantage of using oil in OCB as an arc quenching medium is:

a: It has high dielectric strength Explanation

Explanation

b: As a result of decomposition of oil, it has good cooling property Explanation

Explanation

c: Both It has high dielectric strength and As a result of decomposition of oil, it has good cooling property Explanation

Explanation

d: Highly inflammable Explanation

Explanation

SF6 circuit breaker is __________

a: Expensive Explanation

Explanation

b: SF6 gas has to be reconditioned after every operation of the breaker and additional equipment is required for these purposes Explanation

Explanation

c: Both Expensive and SF6 gas has to be reconditioned after every operation of the breaker and additional equipment is required for these purposes Explanation

Explanation

d: None Explanation

Explanation

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