Electronic less/over-voltage protective device for low-voltage circuit breaker and control method thereof

A technology of overvoltage protection device, low voltage circuit breaker, applied in the direction of automatic disconnection emergency protection device, emergency protection circuit device, protection reacting to overvoltage, etc., can solve voltage failure, stuck, only two wires , can only detect the zero line and the live line or the live line and the live line, etc., to improve the accuracy and ensure the reliability.

Inactive Publication Date: 2009-04-22
TIANJIN BAILI ELECTRIC CO LTD
View PDF0 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This structure has two disadvantages. One is that it is installed on the circuit breaker mechanism and used in conjunction with the mechanism. Sometimes the moving iron core of the undervoltage release will be stuck with the mechanism; the other i

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
  • Electronic less/over-voltage protective device for low-voltage circuit breaker and control method thereof
  • Electronic less/over-voltage protective device for low-voltage circuit breaker and control method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] In order to further understand the content, characteristics and effects of the present invention, the following examples are given, and detailed descriptions are as follows in conjunction with the accompanying drawings:

[0024] Such as figure 1 As shown, the three-phase voltage transformers A, B, and C of the main circuit of the low-voltage circuit breaker input the voltage signal to each input port of the precision operational amplifier; the precision operational amplifier inputs the processed signal to the I of the single-chip microcomputer through the electronic gating switch. / O port; after the single-chip computer measures each phase signal and compares it with the qualified range value in the logic program, if one phase fails, the single-chip computer outputs a signal to the relay through the I / O port; the normally closed node of the relay Connect to the opening actuator of the circuit breaker; after the circuit breaker is successfully opened, the single-chip mic...

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 present invention relates to a low-voltage circuit breaker electronic undervoltage and overvoltage protection device and a control method. The device consists of voltage transformers of A, B, C, N phases on the incoming end of an acquisition circuit breaker, a precise operational amplifier, an electronic strobe switch, a single-chip microcomputer, a relay and a circuit breaker executive mechanism. Voltage transformers of A, B, C phases input a voltage signal to the input ports of the precise operational amplifier; the precise operational amplifier inputs the signal after the treatment to the I/O port of the single-chip microcomputer through the electronic strobe switch; the single-chip microcomputer measures the signal of each phase and compares with the qualified range value in a logic program; if one phase signal is not qualified, the single-chip microcomputer outputs the signal to the relay through the I/O port; the NC node of the relay is connected to a switch opening executive mechanism of the relay. The intelligent device with the microprocessor as the core, plus the control flow procedures of the microprocessor, can improve the sampling precision and ensure the action reliability of low-voltage circuit breaker.

Description

technical field [0001] The invention belongs to a circuit breaker, in particular to an electronic undervoltage and overvoltage protection device and a control method for a low-voltage circuit breaker. Background technique [0002] my country's low-voltage electrical appliances have experienced many years of development history, and have made a qualitative leap from functional categories to quality characteristics. Short-circuit and overload protection are the traditional protection forms of low-voltage electrical appliances. Voltage protection is not very important. Some lines only protect against undervoltage, but undervoltage and overvoltage faults also cannot make the load work reliably. The traditional undervoltage release is realized by the electromagnetic system, and the moving iron core is controlled by the gain and loss of the electromagnetic coil, thereby controlling the action of the circuit breaker. This structure has two disadvantages. One is that it is installe...

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
IPC IPC(8): H02H3/20H02H3/24H02H3/04
Inventor 史祺高云旭于振国高辉刘蕾黄艳杰
Owner TIANJIN BAILI ELECTRIC CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap