SCOPE T&M Engineer Trainee Interview Questions, Process, and Tips

Current transformer is used to measure high currents while potential transformer is used to measure high voltages.

• Current transformer is a type of instrument transformer that steps down high currents to a lower, measurable value.

• It is commonly used in power systems to measure and protect against overcurrents.

• Potential transformer is also an instrument transformer that steps down high voltages to a lower, measurable val...read more

Neutral and earth are two different components of an electrical system.

• Neutral wire carries current back to the source in a balanced electrical circuit.

• Earth wire is a safety measure to protect against electrical faults and provide a path for current to flow to the ground.

• Neutral wire is connected to the center tap of the transformer, while earth wire is connected to the ground.

• Neutral wire carries current under normal...read more

Neutral can be generated by using a transformer or by connecting a neutral conductor to the system.

• A transformer can be used to generate a neutral point by connecting the primary winding to a three-phase supply and the secondary winding to a star-connected load.

• A neutral conductor can be connected to the system by using a neutral earthing transformer or by connecting a neutral conductor to the neutral point of the tran...read more

Various tests are performed on transformers to ensure their proper functioning and safety.

• Insulation resistance test

• Turns ratio test

• Winding resistance test

• Short circuit test

• Open circuit test

• Impulse test

• Temperature rise test

• Dielectric strength test

• Partial discharge test

Losses in a transformer are the energy losses that occur during the conversion of electrical energy from one voltage level to another.

• There are two main types of losses in a transformer: copper losses and iron losses.

• Copper losses, also known as I^2R losses, occur in the transformer windings due to the resistance of the copper wire.

• Iron losses, also known as core losses, occur in the transformer core due to hysteresis ...read more