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Fault current protection switch

A technology of fault current protection and fault current, which is applied in the direction of protection switches, protection switch operation/release mechanisms, switches operated by overcurrent and other abnormal electrical conditions, and can solve problems affecting technical processes, repairs and maintenance Consumption, power grid interruption and other issues, to ensure protection, improve technical process and stability, and reduce the number of times

Inactive Publication Date: 2016-05-25
EATON IND (AUSTRIA) GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, this also leads, as before, to unnecessary grid interruptions, which adversely affects the technical process and creates repair and maintenance costs

Method used

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  • Fault current protection switch
  • Fault current protection switch
  • Fault current protection switch

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0021] figure 1 , 7 and 9 respectively show a preferred embodiment of a fault current circuit breaker 1 with switch contacts 8 and at least one fault current detector 2 for determining a fault current signal, wherein the fault current circuit breaker 1 is designed in such a way that when a fault current greater than a predeterminable triggering fault current occurs, a separation of the switching contacts 8 is caused, wherein the fault current circuit breaker 1 has a first circuit arrangement 4 which It is designed to prevent tripping of the fault current circuit breaker 1 when the duration of the occurrence of the fault current is less than the half-period length of the grid frequency of the grid.

[0022] The embodiment of the first circuit arrangement 4 according to the invention reduces the number of unnecessary grid interruptions and their consequences, and improves the availability of electrical energy. In this way, it can be reliably ensured that in the event of a fault...

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PUM

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Abstract

In a fault current protection switch with a switch contact (8) and at least one to determine the fault current detector (2) that is used to determine the fault current signal (2), the fault current protection switch (1) is constructed in this way.When a fault current that can be pre -triggered that can be pre -ordered, the separation of the switch contact (8) is caused by the fault current. The fault current protection switch (1) has the first circuit device (4).When a half -cycle length of the power grid frequency of the duration of the duration of the grid appears, the trigger of the fault current protection switch (1) is prevented.

Description

technical field [0001] The present invention relates to fault current protection switches. Background technique [0002] The fault current circuit breaker is designed and designed to trigger in the event of a fault current of a predetermined magnitude and to disconnect a downstream subsystem from an upstream supply network by opening the disconnecting contact, thereby protecting persons from dangerous body currents and protect equipment from fire. However, the triggering condition of the fault current protection switch is only related to the magnitude or amplitude of the fault current that occurs, so the fault current protection switch has the disadvantage that the fault current that occurs very briefly is greater than the triggering fault current of the relevant fault current protection switch This short-term fault current is also triggered when there is no immediate danger to persons or equipment, thus causing downstream technical equipment to be shut down unnecessarily. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H83/22H01H71/44H02H3/33
CPCH01H71/44H01H83/226H02H3/33H02H3/093
Inventor R·尼霍夫
Owner EATON IND (AUSTRIA) GMBH