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Leakage circuit cutout

A leakage current and current breaker technology, which is applied in the field of improvement of leakage current circuit breakers, and can solve problems such as inability to perform leakage tests.

Active Publication Date: 2010-10-06
FUJI ELECTRIC FA COMPONENTS & SYST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is a problem that if one of the phases connected to the test circuit that generates the simulated leakage current is open, the leakage test cannot be performed

Method used

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  • Leakage circuit cutout
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  • Leakage circuit cutout

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0039] figure 1 is a block diagram illustrating an embodiment of the present invention.

[0040] exist figure 1 Among them, the reference numeral 10 denotes a leakage circuit interrupter. Usually, all these constituent elements are densely formed and housed in a molded case made of insulating resin. Leakage circuit interrupter 10 includes: a three-phase alternating current circuit 1 connected to power supply connection end 1A and load connection end 1B; a switch 2 for opening / closing alternating current circuit 1; And detect the zero-phase current transformer 3 that flows into the leakage current in the AC circuit 1; Distinguish whether there is a leakage discrimination circuit 6 that leakage current occurs by monitoring the detection current of the leakage current detection coil 3a of the zero-phase current transformer 3; The output signal of the leakage identification circuit 6 with leakage occurs to trip the switching structure of the switch 2 and to interrupt the trip...

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PUM

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Abstract

The invention discloses a leakage circuit cutout, which is characterized by the following: the oscillating circuit 7c is set based on AC power frequency to analog leakage current, which detects circuit 7 through starting-to-closing operating switch 7b in the zero-phase transformer 3.

Description

technical field [0001] The present invention relates to a leakage circuit interrupter for preventing accidents caused by expansion of leakage in advance by detecting leakage occurring in a power distribution system to which electric motors or other types of loads are connected, and more particularly to leakage circuit interrupters to which a test circuit is added. streamer improvements. Background technique [0002] Generally, in order to accurately perform a leakage operation test of a leakage circuit interrupter, various test circuits attached to the leakage circuit interrupter have been made. image 3 An example of such a cutout is shown. image 3 A simplified configuration of a conventional leakage circuit interrupter described in Patent Document 1 is shown. [0003] exist image 3 Among them, the reference numeral 1 represents a three-phase alternating current circuit, the reference numeral 2 represents a switch for turning on and off the alternating current circuit 1, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H83/04
CPCH02H3/335H01H83/04H01H71/04
Inventor 工藤高裕浅野久伸
Owner FUJI ELECTRIC FA COMPONENTS & SYST CO LTD