Unlock instant, AI-driven research and patent intelligence for your innovation.

Built-in self-test function leakage protection circuit and its detection method

A technology with built-in self-test and leakage protection, applied in emergency protection circuit devices, emergency protection devices with automatic disconnection, circuit devices, etc., which can solve problems such as affecting normal use, long operation time of the test button, and easy to burn the circuit.

Active Publication Date: 2019-09-20
ZHEJIANG LONGWAY MICROSYST
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the above-mentioned method of using the test button in the prior art will trigger and cut off the power supply, which affects normal use, and the test button is operated for too long and is easy to burn the circuit, and provides a periodic test device for leakage detection circuit and its detection method

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Built-in self-test function leakage protection circuit and its detection method
  • Built-in self-test function leakage protection circuit and its detection method
  • Built-in self-test function leakage protection circuit and its detection method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A leakage protection circuit with built-in self-test function (see attached Figures 1 to 7 ), connected to the current sensing coil, including DC bias circuit, differential amplifier, differential to single-ended output operational amplifier, first comparator, second comparator, third comparator, delay circuit, counting / non-counting mode selection circuit, normal / test mode selection circuit, counter, OSC oscillator, fast charge and discharge control circuit, digital logic control circuit, power management circuit and alarm drive circuit, the input end of the DC bias circuit is connected to the current induction coil, the The output terminal of the DC bias circuit is connected to the input terminal of the differential-to-single-ended output operational amplifier through a differential amplifier, and the output terminal of the differential-to-single-ended output operational amplifier is connected to the first comparison terminal of the first comparator, and the first comp...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a built-in self-test function leakage protection circuit, which solves the deficiencies of the prior art. The technical scheme is of comprising a DC bias circuit, a differential amplifier, a differential-to-single-ended output operational amplifier, a first comparator, a second comparator, a third comparator, a delay circuit, a counting / non-counting mode selective circuit,a normal / test mode selection circuit, a counter, an OSC oscillator, a fast charge and discharge control circuit, a digital logic control circuit, a power management circuit, and an alarm drive circuit.

Description

technical field [0001] The invention relates to a leakage protection circuit and a detection method thereof, in particular to a leakage protection circuit with a built-in self-test function and a method thereof Background technique [0002] 50 / 60HZ frequency AC power is widely used in industry, agriculture, transportation, national defense, enterprises, hospitals, schools and residents. In order to ensure the safety of personal life and property, AC power supply systems at all levels and residential electricity consumption Both require the installation of leakage detection circuit devices, so as to be able to effectively detect leakage or electric shock accidents, cut off the power supply in time, and prevent the occurrence of safety accidents. However, none of the current leakage detection circuit devices is installed or has an automatic life detection function circuit. When the leakage detection circuit device cannot be used normally due to factors such as aging or device ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H02H3/32G01R31/28
Inventor 刘军宋夏冰
Owner ZHEJIANG LONGWAY MICROSYST