Addverb Technologies ITI Electrician Interview Questions, Process, and Tips

Rewinding a 72 slot 50 hp motor involves disassembling the motor, removing the old windings, and replacing them with new windings.

• Disassemble the motor carefully to access the windings

• Remove the old windings without damaging the core

• Calculate the number of turns and wire gauge needed for the new windings

• Wind the new coils carefully and evenly in the slots

• Connect the windings properly and test the motor for functionalit

NO NC stands for Normally Open and Normally Closed. They refer to the state of a switch or relay when it is not activated.

• NO (Normally Open) - the switch is open (off) when not activated

• NC (Normally Closed) - the switch is closed (on) when not activated

• Used in electrical circuits to control the flow of current

• Commonly used in control panels, automation systems, and safety circuits

Earthing points are checked by using a multimeter to measure the resistance between the earthing point and the earth electrode.

• Use a multimeter set to the resistance mode

• Connect one probe to the earthing point and the other probe to the earth electrode

• Check the resistance reading on the multimeter

• A low resistance reading indicates a good earthing connection

• Repeat the process for all earthing points in the system

Fan rewinding is the process of replacing the copper wire coils in the stator of a fan motor to restore its functionality.

• Disconnect the fan from the power source before starting the rewinding process.

• Remove the fan blades and outer casing to access the stator.

• Carefully unwind the old copper wire coils from the stator and measure their length and gauge.

• Select the appropriate gauge and length of copper wire for rewindin...read more

A contactor relay is an electrical device used to control a high-power circuit with a low-power signal.

• Contactor relay consists of a coil, contacts, and an enclosure.

• When the coil is energized, it creates a magnetic field that pulls the contacts together to close the circuit.

• Contactor relays are commonly used in motor control circuits to start and stop motors.

• They can also be used in lighting control, heating systems,