Hitachi Hi-Rel Power Electronics Service Engineer Interview Questions and Answers

My action plan to satisfy customers involves understanding their needs, providing prompt and efficient service, and ensuring their satisfaction through effective communication and follow-up.

• Listen actively to customers to understand their requirements

• Respond promptly to customer inquiries and service requests

• Provide clear and concise explanations of technical issues and solutions

• Ensure timely resolution of customer pro...read more

A circuit breaker is an electrical switch that automatically interrupts the flow of current in a circuit in case of an overload or short circuit.

• It is a safety device used to protect electrical circuits from damage caused by excess current flow.

• It works by detecting the excess current and interrupting the flow of electricity to prevent damage to the circuit.

• Circuit breakers are commonly used in homes, buildings, and in...read more

A relay is an electrically operated switch that uses an electromagnet to mechanically open or close a circuit.

• Relays are commonly used in control circuits to switch high voltage or current using a low voltage signal.

• They can be used to control motors, lights, and other electrical devices.

• Relays can be classified based on their construction, contact configuration, and operating voltage.

• Examples of relays include electro...read more

Yes, I know how to operate air circuit breaker.

• I am familiar with the basic components of an air circuit breaker.

• I know how to turn on and off the breaker.

• I am aware of the safety precautions that need to be taken while operating the breaker.

• I have experience in troubleshooting and repairing air circuit breakers.

• I am knowledgeable about the different types of air circuit breakers and their applications.

Relay is an electrically operated switch that opens or closes circuits electronically.

• Relays are used to control high voltage circuits with low voltage signals.

• They are used in automation systems, power plants, and automobiles.

• Examples include electromagnetic relays, solid-state relays, and thermal relays.

A contactor is an electrical device used to control the flow of electricity in a circuit.

• Contactor is used to switch on and off electrical power to a load.

• It is commonly used in motor control circuits to control the operation of motors.

• Contactor helps in protecting electrical circuits from overload or short circuits.

• It provides a safe and reliable method of controlling high-power electrical loads.

• Contactor can be manua...read more