CN112750671A

CN112750671A - Release for miniature circuit breaker

Info

Publication number: CN112750671A
Application number: CN202011636710.5A
Authority: CN
Inventors: 支朝乾
Original assignee: Haige Technology Co ltd
Current assignee: Haige Technology Co ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2021-05-04

Abstract

The invention relates to a release for a miniature circuit breaker, which comprises a movable iron core, a static iron core, an ejector rod, an iron core sleeve, a leakage coil and a current coil, wherein the leakage coil is wound outside the iron core sleeve, the current coil is wound outside the leakage coil, the number of turns of the leakage coil is greater than that of the current coil, the leakage coil and the current coil are simultaneously wound outside the iron core sleeve, the short-circuit protection and the leakage protection can be realized through one release, the size of the miniature circuit breaker caused by the number of the releases is effectively saved, and the purpose of miniaturization of the miniature leakage circuit breaker is realized.

Description

Release for miniature circuit breaker

Technical Field

The invention relates to a release for a miniature circuit breaker.

Background

The small residual current circuit breaker is a small circuit breaker with residual current protection, the small circuit breaker is provided with short-circuit protection and overload protection, the short-circuit protection is realized through an electromagnetic release, the small residual current circuit breaker needs to be additionally provided with a residual current release to realize the residual current protection in order to realize the residual current protection, and the small residual current circuit breaker is too bulky in size in order to arrange the residual current release.

Disclosure of Invention

In view of the above, an object of the present invention is to provide a trip unit for a small circuit breaker that can achieve both short circuit protection and earth leakage protection.

In order to achieve the purpose, the invention adopts a release for a miniature circuit breaker, which comprises a movable iron core, a static iron core, an ejector rod, an iron core sleeve and a leakage coil, wherein the static iron core is arranged at the front end of an inner cavity of the iron core sleeve, an ejector rod hole is formed in the middle of the static iron core, the ejector rod penetrates through the ejector rod hole, the movable iron core is movably arranged at the rear end of the inner cavity of the iron core sleeve, the rear end of the ejector rod is connected with the movable iron core, a spring is arranged between the movable iron core and the static iron core, the leakage coil is wound outside the iron core sleeve, the release further comprises a current coil, the number of turns of the leakage coil is greater than that of the current coil.

The invention is further arranged that a spring groove is formed around the ejector rod hole at the rear side of the static iron core, and the spring is arranged in the spring groove.

The invention has the advantages that the leakage coil and the current coil are wound outside the iron core sleeve at the same time, when leakage occurs, current generated in the leakage coil drives the movable iron core to push the ejector rod to act to realize tripping, when short circuit occurs, the current of the current coil is instantly increased to generate magnetic field force to drive the movable iron core to push the ejector rod to realize tripping, through reasonable turns and driving force design, the short circuit protection and leakage protection functions can be realized by adopting one tripper, the volume of the miniature circuit breaker caused by the number of the trippers is effectively saved, and the purpose of miniaturization of the volume of the miniature leakage circuit breaker is realized.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present invention.

Fig. 2 is a cross-sectional view of an embodiment of the present invention.

Detailed Description

As shown in fig. 1 and 2, a specific embodiment of the present invention is a release for a miniature circuit breaker, including a movable iron core 1, a stationary iron core 2, a plunger 3, an iron core sleeve 4, a leakage coil 5, and a current coil 6, wherein the stationary iron core 2 is disposed at the front end of an inner cavity of the iron core sleeve 4, a plunger hole 21 is formed in the middle of the stationary iron core 2, the plunger 3 penetrates through the plunger hole 21, the movable iron core 1 is movably disposed at the rear end of the inner cavity of the iron core sleeve 4, the rear end of the plunger 3 is connected to the movable iron core 1, a spring 7 is disposed between the movable iron core 1 and the stationary iron core 2, a spring slot 22 is formed around the plunger hole 21 at the rear side of the stationary iron core 2, the spring 7 is disposed in the spring slot 22, the leakage coil 5 is wound outside the iron core sleeve 4, the current coil 6 is wound outside the leakage coil 5, and the number.

The above examples should not be construed as limiting the present invention, but any modifications made based on the spirit of the present invention should be within the scope of protection of the present invention.

Claims

1. The utility model provides a release for miniature circuit breaker, is including moving iron core, quiet iron core, ejector pin, iron core cover, leakage coil, and quiet iron core setting forms the ejector pin hole in the middle of the quiet iron core at the front end of iron core cover inner chamber, and the ejector pin is worn at the ejector pin downthehole, moves the iron core activity and sets up the rear end at iron core cover inner chamber, and the ejector pin rear end with move the iron core and be connected, move and be provided with the spring between iron core and the quiet iron core, leakage coil is around outside iron core cover, its characterized in that: the tripper also comprises a current coil, the current coil is wound outside the leakage coil, and the number of turns of the leakage coil is greater than that of the current coil.

2. The trip unit for a miniature circuit breaker of claim 1 wherein: and a spring groove is formed around the ejector rod hole at the rear side of the static iron core, and the spring is arranged in the spring groove.