Value Point Systems Interview Questions and Answers

66kv lines are used for transmitting electricity over long distances with minimal power loss.

• 66kv lines are used for long distance transmission of electricity

• Higher voltage reduces power loss during transmission

• 66kv is a common voltage level for transmission lines

• Lower voltage lines would result in higher power losses

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

• Consists of two or more coils of insulated wire wound around a core

• Primary coil receives electrical energy and induces a magnetic field in the core

• Secondary coil receives the magnetic field and converts it back into electrical energy

• Used to step up or step down voltage levels in power distribution systems

A breaker is an electrical switch that automatically interrupts an electrical circuit during abnormal conditions.

• Breakers are designed to protect electrical circuits from overloads, short circuits, and other faults.

• When a fault occurs, the breaker trips and interrupts the flow of electricity to prevent damage to the circuit or equipment.

• There are different types of breakers such as thermal, magnetic, and hybrid breakers.

• Examples of breakers include circuit breakers, fuse boxe...read more

A potential transformer is a type of instrument transformer used to measure voltage in high voltage systems.

• It is also known as a voltage transformer.

• It steps down the voltage of the primary circuit to a lower, measurable value.

• The secondary winding of a potential transformer is connected to measuring instruments or protective relays.

• It provides accurate voltage measurements for monitoring and control purposes.

• Potential transformers are commonly used in power systems, electri...read more

A lightning arrester is a device used to protect electrical systems from the damaging effects of lightning strikes.

• It is also known as a surge arrester or lightning diverter.

• It is typically installed on power lines, communication lines, and electrical equipment.

• The arrester diverts the high voltage of a lightning strike to the ground, protecting the system from damage.

• It works by providing a low-resistance path for the lightning current to follow, preventing it from flowing t...read more

A current transformer is a device used to measure or monitor electric current by transforming high currents into lower, more manageable levels.

• Current transformers are commonly used in electrical power systems to measure current flowing through a conductor.

• They consist of a primary winding and a secondary winding, with the primary winding connected in series with the current to be measured.

• The secondary winding is connected to a measuring or monitoring device, such as an amme...read more