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Auxiliary tripping unit for a circuit breaker

A circuit breaker and tripping technology, applied in the field of undervoltage tripping units, can solve problems such as complex structures

Inactive Publication Date: 2014-05-28
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As a result of this, on the one hand, a coupling must be provided for the release element and the associated mechanism and for the auxiliary switch, a complex construction is required and this even involves the locking mechanism itself
There are particular restrictions when accommodating the auxiliary switch, since it must be arranged together with the associated coupling on that side of the auxiliary trip unit facing the locking mechanism
The same problem exists in the trip mechanism with armature, movable body and trip piece

Method used

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  • Auxiliary tripping unit for a circuit breaker
  • Auxiliary tripping unit for a circuit breaker
  • Auxiliary tripping unit for a circuit breaker

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Embodiment Construction

[0023] In the undervoltage release unit, it is monitored by a monitoring device whether the voltage applied between two potential points exceeds a threshold value. If this is the case, the monitoring device moves the armature, which acts indirectly on the trip member, so that the trip member moves out of the housing of the undervoltage trip unit and acts on the circuit breaker. locking mechanism, while the undervoltage trip unit belongs to the circuit breaker.

[0024]In the present case, the armature 10 is coupled via a drum 12 , which is rotatable about an axis of rotation A, to a trip slide 14 . The drum 12 has a central, presently circular tube 16 , which can be inserted as a bearing on a rod (not shown) and rotates about it. Wheel-shaped disks 18 , 20 are arranged on both sides of the tube 16 , wherein the outer diameter of these disks is greater than the diameter of the tube 16 . exist image 3 The disc 18 shown separately in FIG. 2 is not covered with an annular cove...

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Abstract

In an undervoltage tripping unit of at least one embodiment, an armature acts on a tripping slide via a drum. During tripping, an auxiliary switch is closed. In order to reset the under-voltage tripping unit after tripping, a latching mechanism of an associated circuit breaker acts on the drum via a driver bolt. At the same time, a projecting element is formed on the drum and closes the auxiliary switch when the drum is rotated back. The auxiliary switch therefore need not itself be directly coupled to the latching mechanism.

Description

technical field [0001] The present invention relates to an auxiliary trip unit for a circuit breaker, and in particular to an undervoltage trip unit. Background technique [0002] The task of circuit breakers is to disconnect several consumers from the voltage supply network in the event of certain disturbances. A typical disturbance is the occurrence of a short-circuit current, and circuit breakers are usually designed to move the switching element and thus disconnect the connection between the customer and the power supply when such a short-circuit current occurs. [0003] However, it is now also desirable to disconnect the customer from the grid in this way in other cases. It may be the case, in particular, that it is desired to disconnect the customer from the grid in the event of an overvoltage in the grid or in the event of an undervoltage in the grid. Auxiliary trip units are used to provide a function for this purpose. Such a unit is typically designed as a plug-i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H71/12H01H71/46H01H83/12
CPCH01H71/50H01H3/42H01H71/2463H01H71/46H01H83/12
Inventor 米夏埃尔·弗赖穆特于尔根·伦纳安德烈亚斯·施佩特
Owner SIEMENS AG
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