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Intelligent phase-detecting amplitude-detecting leak comprehensive protector with self diagnostic function

A comprehensive protector and self-diagnosis technology, applied in the direction of automatic disconnection of emergency protection devices, emergency protection circuit devices, electrical components, etc., can solve the problem of inability to achieve regular leakage protection, without trip coil leakage signal amplification circuit self-diagnosis functions, etc.

Inactive Publication Date: 2005-03-02
郑祥衡
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  • Abstract
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AI Technical Summary

Problems solved by technology

It not only has the function of leakage phase detection and amplitude detection, but also has comprehensive functions such as ground fault, overcurrent, short circuit, undervoltage, overvoltage protection and display, but it does not have the function of trip coil, zero sequence current transformer and leakage signal amplification. The circuit self-diagnosis function, can not realize the experiment of regular leakage protection function

Method used

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  • Intelligent phase-detecting amplitude-detecting leak comprehensive protector with self diagnostic function
  • Intelligent phase-detecting amplitude-detecting leak comprehensive protector with self diagnostic function

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Embodiment Construction

[0009] The present invention will be further described below in conjunction with the embodiments and accompanying drawings.

[0010] see figure 1 and figure 2 , an intelligent phase and amplitude leakage comprehensive protector with self-diagnosis function, which includes an air circuit breaker, an opening and closing operating mechanism, a zero-sequence transformer LH, a single-chip microcomputer U2, a leakage simulation circuit, a voltage detection circuit, and a power supply unit Circuit, leakage signal amplifying circuit, leakage current display circuit, electric opening and closing control circuit, it also has a standard signal generating circuit and a self-diagnosis circuit, the standard signal generating circuit is connected to the input end of the leakage signal amplifying circuit; resistor R32 is connected to the mutual inductance device L, the standard resistor R33 is connected to the bidirectional thyristor SCR3, the control pole of the bidirectional thyristor SCR...

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Abstract

This invention relates to amplitude discrimination and phase discrimination comprehensive earth leakage protective device which comprises: air break, switch-on / off mechanism, zero sequence currentm utual inductor, one-chip computer, leakage simulative circuit, voltage testing circuit, power source unit circuit, leakage signal amplification circuit, leakage current display circuit, eelctricity-driven switch-on / off circuit, standard signal generating circuit and self-detecting circuit. It has functions of: amplitude-discrimination, phase-discriminatino of leakage and detecting earth fault, over-current, short-circuit, under-voltage, over-voltage, and the protection and dislaynig therefor. IT can processed periodic testing leakage protection function by self-detecting circuit. This invention increases the effect and reliability of leakage protection.

Description

1. Technical field [0001] The invention relates to a leakage comprehensive protector, in particular to an intelligent phase-discrimination and amplitude-discrimination comprehensive protection device for leakage. 2. Background technology [0002] The applicant once designed an "Intelligent Phase and Amplitude Leakage Comprehensive Protector" (ZL02280316.5, publication date: 2003.10.22), which includes an air circuit breaker and an opening and closing operating mechanism, and is characterized in that it also includes a leakage Protection and under-voltage protection detection and control circuit, a zero-sequence current transformer has two secondary sides, one secondary side is connected with the leakage analog generation circuit composed of buttons SW1~SW4 and resistors R9~R13, and the other secondary side It is connected with the leakage signal amplification circuit, the leakage signal amplification circuit is connected with the single-chip computer, th...

Claims

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Application Information

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IPC IPC(8): H02H3/04H02H3/34
Inventor 郑祥衡李奎
Owner 郑祥衡
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