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Circuit breaker, in particular for low voltages

A circuit breaker, low-voltage technology, applied in the direction of circuit breaker components, circuit breakers with excessive current, circuit breaker contacts, etc.

Active Publication Date: 2010-05-12
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This prevents undesired retraction (reclosing) of the circuit breaker

Method used

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  • Circuit breaker, in particular for low voltages
  • Circuit breaker, in particular for low voltages
  • Circuit breaker, in particular for low voltages

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0012] figure 1 A section through a closed circuit breaker for low voltage is shown, which has a rotationally arranged contact lever 1 in the form of a double lever 1 a for opening and closing. At their free ends, the contact levers 1 each support contact pieces 2 , which point in opposite directions and form the moving contacts of the circuit breaker. The contacts 3 with fixed contacts are respectively arranged opposite the contacts 2, in figure 1 The middle contact 2 rests on this contact because the contact lever 1 is in the figure 1 shown in its closed position. The contact piece 3 is fastened to a fixed wire turn 4, which is used for power supply. For connection to a circuit breaker, the turns 4 are provided at their ends with connection terminals, not shown.

[0013] When the circuit breaker is closed, current flows from one turn 4 to the other turn 4 via the associated contacts 2 , 3 , the contact lever 1 and the contacts 3 , 2 .

[0014] The contact lever 1 is ...

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PUM

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Abstract

A circuit breaker is disclosed, in particular for low voltages, with moving and fixed contacts, a switching shaft and a contact lever. The contact lever is rotatably mounted on or in the switching shaft, and includes a free end that extends from the switching shaft, carries the contact piece of the moving contact on one side of its external contour and has a first depression on the other opposite side of the external contour for engaging a bolt. In at least one embodiment, the contact lever is subjected to a torsional moment in the closing direction by means of the bolt in each case. To ensure opening, it is proposed that a second depression be provided at a distance from the first depression, that a slot-shaped recess be formed on the switching shaft, that the contact lever, in the event of a trip, moves the bolt towards the side wall of the recess which lies in the direction of movement, which pushes the bolt out of the first depression into the second depression, the depth of which is such that the bolt lies on the bottom of the recess, which rises radially in the closing direction in such a way that a counter force must be overcome in order to rotate the contact lever in the closing direction.

Description

technical field [0001] The invention relates to a circuit breaker, in particular for low voltages, according to the preamble of claim 1 . Background technique [0002] Circuit breakers for low voltage are well known. For example, a double-contact lever is used for opening and closing a circuit breaker, which is provided at its free end with a contact piece which in each case forms a moving contact. Opposite the contact part of the moving contact is a contact part of a stationary contact. The contact lever is rotatably arranged in the working shaft and extends transversely to its longitudinal axis, wherein the end of the contact lever protrudes from the working shaft. The contact piece of the moving contact is arranged on one side of the outer contour, while on the opposite side there is a recess in which a pin extending parallel to the working axis is suspended. The elastic force of a pair of springs acts on the two ends of the pin shaft, and the torque of the elastic for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H73/04H01H1/20H01H1/50H01H1/26
CPCH01H77/104H01H1/2041
Inventor 约尔格-乌韦·达尔卢德维克·戈代沙
Owner SIEMENS AG
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