Excel Technical Services Interview Questions, Process, and Tips

PM of motor & feeder refers to the preventive maintenance of both the motor and feeder systems.

• Regularly inspect and clean motor components to prevent overheating and ensure proper functioning.

• Check feeder connections for any loose or damaged wires that could cause electrical issues.

• Schedule routine maintenance tasks such as lubricating moving parts and testing safety features.

• Keep detailed records of maintenance activ...read more

VCB stands for Vacuum Circuit Breaker and ACB stands for Air Circuit Breaker. Both are types of circuit breakers used in electrical systems.

• VCB uses vacuum as the arc quenching medium, while ACB uses air.

• VCB is more reliable and requires less maintenance compared to ACB.

• VCB is more suitable for medium voltage applications, while ACB is commonly used in low voltage applications.

• VCB has a faster operation time compared t

Equipment used in motor feeder includes circuit breakers, contactors, overload relays, and motor starters.

• Circuit breakers are used to protect the circuit from overloads and short circuits.

• Contactors are used to control the flow of electricity to the motor.

• Overload relays protect the motor from overheating by monitoring the current flow.

• Motor starters combine the functions of a contactor and overload relay to start and...read more

Resistance and IR are required to limit the inrush current and prevent damage to the motor.

• Resistance limits the initial current surge when starting the motor

• Inrush current can be controlled by using a soft starter or a variable frequency drive

• Insulation resistance (IR) is important to prevent short circuits and ensure safety

• Proper sizing of resistors and monitoring IR can help in efficient motor operation

A transformer is an electrical device that transfers electrical energy between two or more circuits through electromagnetic induction.

• Transformers consist of two coils of wire, known as the primary and secondary coils.

• The primary coil is connected to a power source, creating a magnetic field when current flows through it.

• This magnetic field induces a voltage in the secondary coil, transferring electrical energy to the ...read more