The function of an indoor vacuum circuit breaker

Indoor vacuum circuit breakers are mainly used to cut off and connect load current and fault current in high-voltage circuits to protect electrical equipment. Its core role is reflected in two aspects:

‌Normal operation‌: When the circuit is operating normally, the load current can be connected or disconnected to ensure the stable operation of the power system.

‌Fault protection‌: When the system has abnormal conditions such as short circuit, it can quickly cut off the fault current to prevent equipment damage or accident expansion and ensure system safety. ‌

Specific functions

‌Current control‌: Supports frequent operations (such as switch operations) and is suitable for occasions requiring high reliability (such as substations, industrial and mining enterprises, etc.).

‌Dielectric properties‌: Using vacuum as an arc extinguishing medium, it does not require maintenance and has a compact structure, which is particularly suitable for indoor environments. ‌

Applicable scenarios

It is often configured in distribution devices such as central cabinets and double-layer cabinets as a key component for controlling and protecting high-voltage equipment.