Operating mechanism of selective protection switch

Abstract

The invention discloses an operating mechanism of a selective protection switch. The operating mechanism comprises a base, a knife switch and a contact mechanism which are assembled on the base and can rotate, a linkage connecting the knife switch with the contact mechanism, a spring assembled between the contact mechanism and the base and a jumping pin device installed on the base and used for driving the linkage to act. The operating mechanism is characterized in that the jumping pin device comprises a first jumping pin and a second jumping pin which are coaxially pivoted on the base; the first jumping pin is provided with an extension part used for interfering with the second jumping pin and driving the second jumping pin to rotate; at the same time, a torsion spring interfering with the first jumping pin to rotate is assembled on a pivot; the operating mechanism also comprises a latch linked with the linkage; and the first jumping pin and the latch interfere with each other to ensure the linkage not to act. The operating mechanism has the following advantages: the operating mechanism has the function of alarming without opening under the condition of thermal overload and can better protect the personnel and equipment in the distribution system.

Description

technical field [0001] The invention belongs to the field of low-voltage electrical appliances, in particular to an operating mechanism for a selective protection switch. Background technique [0002] At present, with the development of building electrical and building automation, more and more selective protection switches are used. This type of switch can well solve the phenomenon of leapfrog tripping of power distribution terminals and greatly improve the stability of power distribution systems. . This type of switch can be found in patent documents such as Chinese patents CN200810032610.4 and CN200810032609.1. It usually consists of a switch body and an alarm module. The switch body is usually composed of a main circuit current release and an auxiliary circuit current release. Release, main contact, auxiliary contact, operating mechanism, electromagnetic system, and arc extinguishing system. The operating mechanism is the core mechanism of this type of switch, which det...

AI Technical Summary

Problems solved by technology

The existing operating mechanism usually triggers the alarm and the opening action at the same time when the power distribution system is thermally overloaded. Only when the power distribution system is thermally Special places such as fire protection often require protection switches to alarm but not open in the case of thermal overload of the system

In the prior art, there is no literature report on the selective protection switch with thermal overload alarm and non-opening, and there are no related products.

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