Intelligent life testing methods and apparatus for leakage current protection

a leakage current protection and intelligent testing technology, applied in the direction of short-circuit testing, testing circuits, instruments, etc., can solve problems such as leakage current protection devices

Active Publication Date: 2007-07-19
CHEN HENG
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When the trip mechanism state is in the second state, there is at

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  • Intelligent life testing methods and apparatus for leakage current protection
  • Intelligent life testing methods and apparatus for leakage current protection
  • Intelligent life testing methods and apparatus for leakage current protection

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Embodiment Construction

[0042]The present invention is more particularly described in the following examples that are intended as illustrative only since numerous modifications and variations therein will be apparent to those skilled in the art. Various embodiments of the invention are now described in detail. Referring to the drawings, like numbers indicate like parts throughout the views. As used in the description herein and throughout the claims that follow, the meaning of “a,”“an,” and “the” includes plural reference unless the context clearly dictates otherwise. Also, as used in the description herein and throughout the claims that follow, the meaning of “in” includes “in” and “on” unless the context clearly dictates otherwise. Moreover, titles or subtitles may be used in the specification for the convenience of a reader, which has no influence on the scope of the invention. Additionally, some terms used in this specification are more specifically defined below.

DEFINITIONS

[0043]The terms used in this...

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PUM

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Abstract

An apparatus for testing the life of a leakage current protection device having a leakage current detection circuit. In one embodiment, the apparatus a trip mechanism state generator, a fault alarm generator, a ground fault simulation unit. In operation, the ground fault simulation unit generates a simulated ground fault signal during every positive half-wave of an AC power, the simulated ground fault signal is detected by the leakage current detection circuit, the leakage current detection circuit responsively generates a signal to turn a switching device into its conductive state so as to allow a current to pass therethrough, the passed current is converted into a DC voltage in accordance with a trip mechanism state generated by the trip mechanism state generator, the fault alarm circuit receives and analyzes the DC voltage and indicates whether a fault exists in the leakage current protection device.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This application claims priority of Chinese Patent Application No. 2005 1073 2772.1, filed on Dec. 26, 2005, entitled “Intelligent Life Testing Methods and Apparatus for Leakage Current Protection” by Wusheng CHEN, Fu WANG, and Lianyun WANG, the disclosure of which is incorporated herein by reference in its entirety.[0002]This application is related to four co-pending U.S. patent applications, entitled “Intelligent Life Testing Methods and Apparatus for Leakage Current Protection Device with Indicating Means,” by Feng ZHANG, Honigliang CHEN, Fu WANG, Wusheng CHEN, Yulin ZHANG and Huaiyin SONG, (Attorney Docket No. 15183-54222); “Apparatus and Methods for Testing the Life of a Leakage Current Protection Device,” by Feng ZHANG, Hongliang CHEN, Fu WANG, Wusheng CHEN, Yulin ZHANG and Huaiyin SONG; (Attorney Docket No. 15183-54223); “Intelligent Life Testing Methods and Apparatus for Leakage Current Protection,” by Feng ZHANG, Hongliang CHEN, F...

Claims

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Application Information

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IPC IPC(8): G01R31/08
CPCG01R31/025H02H3/335G01R31/3278G01R31/52
Inventor CHEN, WUSHENGWANG, FUWANG, LIANYUN
Owner CHEN HENG
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