India Power Corporation Production Supervisor Interview Questions and Answers

An antipumping relay is used to prevent the breaker from repeatedly closing and opening in case of a fault.

• The antipumping relay is a protective device used in circuit breakers.

• It prevents the breaker from 'pumping' or repeatedly closing and opening due to a fault.

• When a fault occurs, the relay detects the fault current and prevents the breaker from reclosing until the fault is cleared.

• This helps to protect the electri...read more

Distribution refers to the delivery of electricity from high voltage transmission lines to individual customers. Transmission refers to the movement of electricity over long distances from power plants to substations.

• Distribution involves the delivery of electricity to individual customers through a network of power lines and transformers.

• Transmission involves the movement of electricity over long distances from power ...read more

Magnetic core balance test is done to measure the balance of magnetic cores in a transformer.

• The test is performed by injecting a current into one winding of the transformer and measuring the voltage induced in the other winding.

• The test is repeated for each winding of the transformer.

• The results are compared to determine if the magnetic cores are balanced.

• If the magnetic cores are not balanced, it can lead to increase...read more

Power factor is a measure of how effectively electrical power is being used and it affects the efficiency of electrical systems.

• Power factor is the ratio of real power (kW) to apparent power (kVA) in an electrical system.

• It indicates how much of the total power is being used for useful work.

• A power factor of 1 means all the power is being used effectively, while a power factor less than 1 indicates inefficiency.

• Low pow...read more

Active power is the actual power consumed by a device or system.

• Active power is measured in watts (W).

• It is the power that is actually doing the work.

• It is the product of voltage and current in an AC circuit.

• It is also known as real power.

• For example, a 100W light bulb consumes 100W of active power.