Circuit breaker compartment is designed with metal shutter to meet requirements of simultaneously automatic isolation between circuit breaker and busbar side.
A special guide rail is installed inside the circuit breaker compartment for circuit breaker trolley to slide and work on it. The rail has automatic positioning function so that the primary moving stationery contact can be aligned automatically when the circuit breaker pushes in. In the compartment, the trolley has “SERVICE” and “TEST” positions. When the trolley is moving from “TEST” position to “SERVICE” position, the shutter is opened automatically; when trolley is moving in a negative direction, then the shutter is closed automatically to completely isolate primary contact.
