Virtual Labs

Fault scenario simulation in a Transformer /Bus

The transformer works on principle of ___________.

a: Self-induction Explanation

Explanation

b: Mutual induction Explanation

Explanation

c: Both Self-induction and Mutual induction Explanation

Explanation

d: None Explanation

Explanation

The ratio of secondary induced emf to primary induced emf is known as ___________

a: Voltage transform ratio Explanation

Explanation

b: Current ratio Explanation

Explanation

c: Power ratio Explanation

Explanation

d: All Explanation

Explanation

Instrument Transformer are used because

a: It is cheap Explanation

Explanation

b: It provides more safety Explanation

Explanation

c: It is not practicable to connect instruments and meters directly to the lines in high voltage circuits Explanation

Explanation

d: It provides more safety and It is not practicable to connect instruments and meters directly to the lines in high voltage circuits Explanation

Explanation

A current transformer is a ________

a: Step up transformer Explanation

Explanation

b: Step down transformer Explanation

Explanation

c: Both Step up transformer and Step down transformer 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

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 of the above Explanation

Explanation

In double bus'bar system ,there is a provision of a bus-bar coupling switch for transferring operation from one bus-bar to another _________

a: True Explanation

Explanation

b: False Explanation

Explanation

_________ is a device which is used to switch from one bus to the other without any interruption in power supply and without creating hazardous arcs.

a: Isolator Explanation

Explanation

b: Circuit breaker Explanation

Explanation

c: Bus coupler Explanation

Explanation

d: Any of the them Explanation

Explanation