High Breaking Capacity, Multiple Intelligent Protection: Frame Withdrawable Circuit Breaker

Before insertion, confirm that the circuit breaker is in the open state and check that there are no foreign objects on the contacts and guide rails; during operation, push it slowly and steadily to ensure that the contacts are fully engaged; when extracting, first disconnect the power supply of the secondary circuit, then use a special crank to shake the Frame Circuit Breaker to the separated position according to the operation instructions. It is strictly forbidden to force plugging and unplugg

1. Regularly check whether the contact surface is oxidized or ablated. If there is slight damage, it can be polished with sandpaper; 2. Clean the internal dust of the Frame Draw-out Type Circuit Breaker to prevent affecting the insulation performance; 3. Test whether the protection function of the intelligent controller is normal, which can trigger tripping by simulating overload and short-circuit signals; 4. Check whether the secondary circuit wiring is loose to ensure stable communication and

A drawer base (drawing frame) is added on the basis of the fixed type, and the circuit breaker body can be inserted or extracted through the guide rail. The main wiring is completed on the drawer base, and there is no need to modify the main circuit busbar when the body is extracted. The secondary wiring adopts automatic or manual connectors, such as nine-wire connectors, to ensure the secondary circuit is reliably disconnected or remains connected when extracted.

Some Frame Draw-out Type Circuit Breakers (such as ACB or MCCB with electronic trip units) can provide ground fault protection to detect and cut off ground fault current.

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