DELHI MSW SOLUTIONS Electrician Interview Questions and Answers

There are three types of protection in a transformer.

• The three types of protection are overload protection, overcurrent protection, and overvoltage protection.

• Overload protection protects the transformer from excessive heat caused by too much current.

• Overcurrent protection protects the transformer from damage caused by excessive current.

• Overvoltage protection protects the transformer from damage caused by excessive vol...read more

The 4 protection devices for an oil type transformer are Buchholz relay, pressure relief valve, oil level indicator, and winding temperature indicator.

• Buchholz relay detects gas accumulation and oil level changes

• Pressure relief valve releases excess pressure to prevent explosion

• Oil level indicator monitors oil level to prevent damage to transformer

• Winding temperature indicator measures temperature to prevent overheatin

MPCB stands for Motor Protection Circuit Breaker.

• MPCB is an electrical device used to protect motors from overloading, short circuits, and phase failures.

• It is a combination of a circuit breaker and a contactor.

• MPCBs are commonly used in industrial and commercial applications.

• They are available in different sizes and ratings depending on the motor's power and voltage requirements.