Power On Connections Tendering Engineer Interview Questions and Answers

Earth potential rise is the increase in voltage that occurs when a large current flows into the ground.

• Occurs when a large current is injected into the ground

• Can be caused by lightning strikes, fault currents, or power system faults

• Can lead to dangerous touch and step potentials

• Important to consider in grounding and lightning protection systems

An 11kv substation typically consists of transformers, circuit breakers, isolators, lightning arresters, busbars, and control panels.

• Transformers: Step up or step down voltage for distribution.

• Circuit breakers: Protect the system from overloads and short circuits.

• Isolators: Provide isolation for maintenance work.

• Lightning arresters: Protect equipment from lightning strikes.

• Busbars: Distribute power within the substatio...read more