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Circuit breaker comprising an electronic trigger and a bypass switch

An electronic trigger, bypass circuit technology, used in circuit devices, emergency protection circuit devices, electrical components, etc.

Inactive Publication Date: 2008-08-06
KLOCKNER-MOELLER GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This has its disadvantage especially when the circuit breaker is connected to an existing short circuit, that is, this will lead to serious consequences for the circuit breaker itself and / or the devices protected by the circuit breaker

Method used

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  • Circuit breaker comprising an electronic trigger and a bypass switch
  • Circuit breaker comprising an electronic trigger and a bypass switch

Examples

Experimental program
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Embodiment Construction

[0016] FIG. 1 shows a three-pole circuit breaker which, via its main contacts 2 , connects a consumer to a low-voltage power supply 6 . The opening and closing of the main contact 2 is realized by the operating device 10 , which generally includes an operating mechanism 12 and an electromagnetic tripping coil 14 . The mains current flowing via the main contacts 2 to the consumer 4 is detected by a current detection device 8 , for example a current transformer or a magnetic current sensor. The measurement signal Ui output by the current detection device 8 is input to an electronic trigger ( )20. Electronic trigger 20 converts measurement signal Ui by means of an AD converter 22 into a digital signal, which is evaluated by a microprocessor 24 . If the measurement signal Ui exceeds certain adjustable parameters, especially the tripping current and the associated delay time, the trigger 20 will send a first trigger signal Uc to a first "OR" input of an activation circuit 9 to a...

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PUM

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Abstract

The invention relates to a circuit breaker comprising current detection means (8), a microprocessor-controlled trigger (20), and a bypass switch (40) which cooperates with a watchdog switch (26) monitoring the functionality of the microprocessor (24). In order to ensure the protective function of the circuit breaker even during short circuits, the bypass switch (40) reacts immediately after very high threshold current values are switched on while reacting to moderately high threshold current values after the switch-on phase, wherefor a switchable reference voltage (Ur) is made available to the bypass switch (40) according to the instantaneous supply voltage.

Description

technical field [0001] The invention relates to a circuit breaker, in particular for low voltages, having an electronic microprocessor controlled trigger and bypass circuit. Background technique [0002] From DE 44 45 060 C1 a circuit breaker with a bypass circuit not described in detail is known, which is triggered electronically when - for some reason - despite exceeding adjustable parameters, especially the tripping current and the associated delay time When the tripping of the circuit breaker is not caused, the forced tripping of the circuit breaker can be caused by passing through the bypass circuit. [0003] A circuit breaker is known from DE 199 27 030 A1, which has: an electronic microprocessor-controlled trigger; and a bypass circuit not described in detail for enabling the a forced trip of the circuit breaker; and a supervisory circuit to monitor the function of the microprocessor. The bypass circuit is connected to the monitoring circuit and has circuit arrangem...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H3/00H02H3/05H02H3/093
CPCH02H3/0935H02H3/05H02H3/006
Inventor 贝恩德·阿伦茨沃尔夫冈·施瓦茨
Owner KLOCKNER-MOELLER GMBH