Answer / Ghanshyam Paliwal

In electrical engineering, VCB (Voltage Changeover Breaker) and Isolator are important components of electrical substations. Here's a brief explanation of their uses:
1. Voltage Changeover Breaker (VCB) - A voltage changeover breaker is used to provide a means of changing the source voltage in a power system. It allows for switching between different voltage levels while maintaining continuity of service.
2. Isolator - An isolator is an electrical switch that is used to electrically and mechanically separate two parts of an electrical circuit without causing any load on the circuit when it is opened. It is primarily used for safety purposes, as it prevents accidental short circuits or arcing.

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