Type of low-voltage circuit breaker accessories

2.1.1 Internal accessories; Internal accessories are accessories installed inside the circuit breaker, including shunt release, undervoltage release, auxiliary switch and alarm switch. Generally, the accessories inside the machine must be opened for installation, but at present, the accessories of new circuit breakers adopt modular structure, and their installation and replacement do not need to be opened, thus ensuring the reliability of the circuit breaker and bringing convenience to users< Br>2.1.2 External accessories; The external accessories are the accessories installed outside the circuit breaker, including auxiliary handle, external operating handle, electric operating mechanism, handle locking device, mechanical interlocking device, electrical interlocking device, rear panel wiring device, plug-in mounting platform, auxiliary contact device, etc< br>