China Indoor Vacuum Circuit Breaker Manufacturers, Suppliers, Factory

Liugao is a professional China indoor vacuum circuit breaker manufacturers and suppliers.An indoor vacuum circuit breaker (VCB) is a type of circuit breaker that utilizes vacuum interrupter technology and is specifically designed for indoor electrical installations. It is used to protect electrical systems from overcurrents and short circuits.

Similar to outdoor VCBs, indoor VCBs employ vacuum interrupters to extinguish the arc that forms when a circuit is interrupted. The vacuum interrupter consists of a sealed vacuum chamber containing contacts that open and close the circuit. When the contacts separate, the arc is drawn into the vacuum chamber, and the vacuum extinguishes it.

Indoor VCBs are typically installed in switchgear panels, distribution boards, or switchrooms located inside buildings or enclosed spaces. They are commonly used in medium-voltage systems, typically ranging from 3.3 kV to 36 kV, although there are variations available for different voltage levels.

The advantages of indoor VCBs include:

1. High interrupting capacity: Vacuum interrupters are capable of interrupting high fault currents, making indoor VCBs suitable for applications where fault levels are significant.

2. Reliable operation: Vacuum interrupters do not require any maintenance, as there are no moving parts to wear out or require lubrication. This results in a high degree of reliability and reduces the need for regular servicing.

3. Excellent electrical insulation properties: The vacuum inside the interrupter provides excellent insulation, allowing for compact design and reducing the risk of electrical breakdown.

4. Fast operation: Indoor VCBs have a quick operating time, enabling them to interrupt the circuit rapidly in the event of a fault, thus minimizing potential damage to the electrical system.

Indoor VCBs are commonly used in a range of applications, including power distribution systems, industrial plants, commercial buildings, and infrastructure projects. They provide reliable protection against electrical faults and contribute to the safe and efficient operation of indoor electrical installations.