Exploring the W1 ACB - An In-Depth Analysis of Its Structure and Working Principle

Closing Process: Energy is stored by compressing a spring via a manual or electric charging mechanism. Upon release, a cam disengages, releasing the stored energy through a four/five-link mechanism to drive the moving and fixed contacts into firm closure, which is then maintained by a latch.
Opening Process: For normal opening, pressing the button activates the trip mechanism, converting the stable four-link into an unstable five-link mechanism, causing the contacts to rapidly separate via the return spring. During faults, various trip units trigger the free-trip mechanism to achieve automatic protective interruption.

     The W1 breaker provides comprehensive protection. Overload protection is achieved by the bimetal strip in the thermal trip unit, featuring an inverse time-lag characteristic. Short-circuit protection is provided by the instantaneous action of the magnetic trip unit. Intelligent trip units utilize a microprocessor to deliver precise four-stage protection (Long-time Delay, Short-time Delay, Instantaneous, and Ground Fault), alongside status monitoring and remote communication capabilities.

     With its high rated parameters (current up to 6300A) and strong breaking capacity, the W1 Frame Circuit Breaker is widely used in building, industrial, and commercial distribution systems. It serves as a key device for transformer outlet main switches, bus tie switches, or high-capacity feeder control, ensuring the safety of distribution mains.