Aditya Birla Group Assistant Engineer 2 Interview Questions, Process, and Tips

HT breaker vacuum bottle integrity test is performed to ensure the vacuum bottle is free from leaks and can withstand high voltage.

• The test is performed using a vacuum pump and a pressure gauge.

• The vacuum pump is connected to the breaker's vacuum bottle and the pressure gauge is connected to the pump.

• The vacuum pump is turned on and the pressure gauge is monitored for any drop in pressure.

• If the pressure drops, it indi...read more

The trip supervision relay is responsible for monitoring the trip circuit of a protective device and ensuring its proper functioning.

• It supervises the trip circuit to detect any faults or abnormalities.

• It ensures that the trip circuit is properly energized and ready to operate when needed.

• It monitors the continuity and integrity of the trip circuit wiring.

• It can provide alarms or indications in case of trip circuit fai...read more

ELCB and RCCB are both electrical safety devices, but differ in their operating principles.

• ELCB detects earth leakage current and operates on the principle of electromagnetic induction.

• RCCB detects both earth leakage and residual current and operates on the principle of differential current transformer.

• ELCB is less sensitive and slower in operation compared to RCCB.

• RCCB is more expensive than ELCB but provides better p...read more

Tan delta test is a diagnostic test to measure the quality of insulation in electrical equipment.

• It measures the dissipation factor of insulation material

• It helps to detect any defects or deterioration in the insulation

• It is commonly used for testing transformers, cables, and capacitors

• The test involves applying a voltage to the equipment and measuring the current and phase angle

• A high tan delta value indicates poor in

There are several types of motor testing including insulation resistance, winding resistance, and vibration analysis.

• Insulation resistance testing measures the resistance of the insulation material surrounding the motor windings.

• Winding resistance testing measures the resistance of the motor windings themselves.

• Vibration analysis testing measures the level of vibration in the motor to detect any potential issues.

• Other ...read more

PI test is a method to measure the insulation resistance of the motor winding.

• PI stands for Polarization Index.

• It is a ratio of insulation resistance measured at 10 minutes to that measured at 1 minute.

• It is used to determine the condition of the motor winding insulation.

• A PI value of 2 or more indicates good insulation.

• A low PI value indicates poor insulation and the motor may need to be rewound or replaced.