A Vacuum Circuit Breaker (VCB) is a type of breaker used for medium-voltage applications up to 33kV, where arc quenching occurs in a vacuum. Its contacts are enclosed in a vacuum chamber, and when they separate to interrupt the current, an arc forms but quickly extinguishes due to the vacuum. VCBs are reliable, need low maintenance, and are widely used in substations, industries, and power distribution systems for their excellent arc control and insulation performance.

A C&R Panel (Control and Relay Panel) is an electrical panel used in substations and power systems to control, monitor, and protect electrical equipment like transformers, breakers, and feeders. It houses protection relays, control switches, meters, and indication devices, enabling operators to control operations remotely and automatically isolate faulty sections during abnormal conditions.