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Adjustable short-circuit release

A release and overcurrent technology, applied in the direction of adjusting the conditions of protection switches, circuits, and parts of protection switches, etc., can solve problems such as unfavorable friction and large force tolerance, and achieve the effect of preventing loosening or unscrewing.

Inactive Publication Date: 2009-07-22
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, torsion springs can only be produced with large force tolerances and have unfavorable friction due to the torsion spring bearing

Method used

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  • Adjustable short-circuit release
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Embodiment Construction

[0018] figure 1 An exploded view showing the main components of an overcurrent release for a power switch for switching and protecting motors and other consumers. The overcurrent release here comprises a coil winding 1 on a coil former 6 , a pole 2 , an armature 3 , a compression spring 5 and a connecting piece 7 . The coil former 6 is formed in one piece with the carrier element 9 . The substantially Z-shaped yoke is formed in one piece and corresponds to the connection part 7 . Furthermore, the combination bolt 8 serves to position the two parts 7 and 9 relative to each other. In the assembled state, the compression spring 5 is located within the coil former 6 between the pole 2 and the armature 3 . On the side facing the compression spring 5 , the armature 3 has a projection 4 corresponding to the inner diameter of the compression spring 5 , which is surrounded by the compression spring 5 in the assembled state. The electrode 2 can be fixed on the connecting piece 7 by ...

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Abstract

The invention relates to an overcurrent release with a yoke, with a coil winding, with a pole, with an armature and with a restraining spring for pre-stressing the armature, wherein an air gap exists between the pole and the armature. The invention is based on the object of specifying an overcurrent release with low force tolerances for the restraining spring, whose response value can be adjusted retrospectively and a circuit breaker with such an overcurrent release. This object is achieved in the case of an overcurrent release of the type mentioned at the outset by virtue of the fact that the restraining spring is in the form of a compression spring provided between the pole and the armature and that the overcurrent release is designed such that the compression spring is replaceable. Compression springs can be produced with lower force tolerances than torsion springs, as a result of which, also advantageously within the permissible tolerance in accordance with IEC60947 of +-20%, the response current can be reduced to, for example, 13 times the rated current minus 20%. Furthermore, compression springs do not have any friction between the turns and do not have as unfavourable friction as a torsion spring mounting arrangement. In addition, the replaceablity of the compression springs makes it possible to shift the response value of the overcurrent release on the finished overcurrent release or finished device retrospectively and easily.

Description

technical field [0001] The invention relates to an overcurrent release with a yoke, a coil winding, a pole, an armature and a safety spring for pretensioning the armature, wherein between the pole and the armature There is an air gap in between. Background technique [0002] A device of this type is used in non-delayed overcurrent releases, as is known in power switches for switching and protecting motors and other consumers. These non-delayed overcurrent releases are designed as electromagnetic releases, which mainly include coil windings, coil formers, armatures, poles, push rods, safety springs and yokes. The armature pulls in at a specific measured current of the power switch, for example at thirteen times the rated current in the case of motor protection or at nineteen times the rated current in the case of transformer protection. The armature movement acts on the locking mechanism and on the movable contact in order to open the contacts. According to the standard (I...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H71/74
CPCH01H71/7409H01H71/7463H01H71/24H01H2219/002
Inventor R·格拉苏哈恩
Owner SIEMENS AG
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