Leakage circuit breaker

Abstract

The leakage breaker comprises the body containing main circuit, the handle, the first electromagnetism release device, the unit for detecting leakage current and the second electromagnetism release device. The handle from the body rotating freely can operate the switching mechanism, which turns on / off the main contact of main circuit. When over current passes through the main circuit, the first electromagnetism releases device through the release gear makes the main contact open forcibly. When leakage current is detected, the second electromagnetism release device through release gear makes the main contact open forcibly. The first electromagnetism release device possesses movable iron core and fixed iron core. The energized conductor in the main circuit is embedded in the fixed iron core. When the fixed iron core pulls the movable iron core, the release gear is released. Adding winding on the movable iron core or fixed iron core makes the second electromagnetism release device.

Description

technical field [0001] The invention relates to a leakage circuit breaker. Background technique [0002] As a conventional earth leakage circuit breaker, it is described in Unexamined-Japanese-Patent No. 11-16478. The earth leakage circuit breaker includes: the opening and closing mechanism that drives the movable contact through the rotation operation of the handle, makes the movable contact contact with the fixed contact, and separates; The composite metal sheet of the current-carrying conductor, and the fixed iron core and the movable iron core arranged in the form of sandwiching the current-carrying conductor (composite metal sheet), and when an overcurrent as large as a short-circuit current flows instantaneously in the current-carrying conductor will be able to The first electromagnetic release device that attracts the moving iron core to the fixed iron core, the zero-phase current transformer that detects the leakage current such as the ground current, and the second...

AI Technical Summary

Problems solved by technology

[0003] As for the above-mentioned conventional example, since two independent electromagnetic release devices are used, that is, the first electromagnetic release device that releases the switching mechanism when an overcurrent such as a short-circuit current flows, and the first electromagnetic release device that releases the switch mechanism due to the detection of leakage current into the coil The second electromagnetic release device that releases the opening and closing mechanism by energization has a large number of parts and cannot save space, so there is a problem of increasing the size of the body

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