Reliance Industries Electrical Maintenance Engineer Interview Questions and Answers

SLD stands for Single Line Diagram which is a graphical representation of an electrical system.

• SLD shows the electrical components and their interconnections in a simplified manner.

• Components include transformers, generators, circuit breakers, switches, etc.

• It also shows the ratings, voltage levels, and protective devices used in the system.

• SLD is used for design, operation, and maintenance of electrical systems.

• It helps in identifying faults and troubleshooting.

• SLD is an imp...read more

Induction motor operates on the principle of electromagnetic induction, while synchronous motor operates at a constant speed determined by the frequency of the power supply.

• Induction motor does not require any external excitation to run, while synchronous motor requires a separate DC power source for excitation.

• Induction motor has a slightly lower efficiency compared to synchronous motor.

• Synchronous motor is used in applications where constant speed is required, such as in cl...read more

IEC standards are guidelines for electrical installations to ensure safety and efficiency.

• IEC 60364 is the main standard for electrical installations in buildings

• IEC 60079 provides guidelines for electrical installations in hazardous areas

• IEC 61892 provides guidelines for electrical installations on offshore structures

• IEC 61439 provides guidelines for low-voltage switchgear and control gear assemblies

• Adherence to IEC standards ensures compliance with international regulations...read more

Transformer parts include core, windings, and insulation. It is used to step up or step down voltage in electrical systems.

• Transformer parts: core, windings, insulation

• Core: provides magnetic path for flux

• Windings: primary and secondary coils

• Insulation: prevents short circuits

• Used to step up or step down voltage in electrical systems

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

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

• Copper losses occur due to the resistance of the copper windings and are also known as I^2R losses.

• Iron losses, also known as core losses, occur due to hysteresis and eddy current losses in the transformer core.

• Other losses in transformers include stray losses, die...read more