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Intelligent combination switch

A compound switch and intelligent technology, applied in the direction of reactive power compensation, reactive power adjustment/elimination/compensation, etc., can solve the problems of non-contact switch, such as large heat generation, intelligent level of harmonic generation, etc., and achieve continuous and safe circuit operation , easy maintenance, large contact capacity

Inactive Publication Date: 2013-03-27
LIUZHOU ELECTRICAL APP RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to overcome the problems of easy sintering of the nodes existing in the low-voltage reactive power compensation on the existing silicon controlled rectifier and AC contactor and the large calorific value of the non-contact switch, the generation of harmonics and the low degree of intelligence, etc., to provide a The composite switch has the advantages of thyristor zero-crossing switching of thyristor at the moment of turning on and off, and has the advantage of no power consumption of the contactor during normal turning on

Method used

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Examples

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Effect test

Embodiment 1

[0039] An intelligent composite switch, comprising a thyristor, a magnetic latching relay, a control circuit, a monitoring circuit, a drive circuit, a protection circuit and an indicator circuit, the thyristor and the magnetic latching relay are connected in parallel, the monitoring circuit, the driving circuit, the protection circuit and The indicator light circuit is respectively connected with the control circuit, and also includes an expansion module, which is connected with the control circuit; the expansion module includes a USB interface and an RS485 interface; the control circuit includes a single-chip microcomputer; the monitoring circuit includes a switching signal detection circuit and a zero-crossing signal detection circuit The zero-crossing signal detection circuit includes a voltage zero-crossing optocoupler bidirectional thyristor and a current transformer; the connection between the intelligent composite switches is connected to the working circuit through a thr...

Embodiment 2

[0043] An intelligent composite switch, comprising a thyristor, a magnetic latching relay, a control circuit, a monitoring circuit, a drive circuit, a protection circuit and an indicator circuit, the thyristor and the magnetic latching relay are connected in parallel, the monitoring circuit, the driving circuit, the protection circuit and The indicator light circuit is respectively connected with the control circuit, and also includes an expansion module, which is connected with the control circuit; the expansion module includes a USB interface and an RS485 interface; the control circuit includes a single-chip microcomputer; the monitoring circuit includes a switching signal detection circuit and a zero-crossing signal detection circuit The zero-crossing signal detection circuit includes a voltage zero-crossing optocoupler bidirectional thyristor and a current transformer; the intelligent composite switch adopts a three-phase split-complement and co-complement connection mode to...

Embodiment 3

[0047] The difference from Embodiment 1 is that the expansion modules are connected in series through USB data lines, and the rest of the working principles are the same.

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Abstract

The invention discloses an intelligent combination switch which comprises a silicon controlled rectifier, a magnetic latching relay, a control circuit, a monitoring circuit, a driving circuit, a protection circuit and an extension module. The silicon controlled rectifier and the magnetic latching relay are in a parallel connection, the monitoring circuit, the driving circuit and the protection circuit are connected with the control circuit respectively, and the extension module is connected with the control circuit. According to the intelligent combination switch, problems that nodes on existing silicon controlled rectifiers and alternating current contactors are prone to sinter, contactless switches are large in heating quantities, and harmonic waves are prone to be generated in terms of low-voltage reactive power compensation are solved; and the intelligent combination switch has the advantages that zero passage switching of the silicon controlled rectifier is achieved at the moment of connection and disconnection, the contactor is free of power consumption at the moment of normal connection, simultaneously, data sharing capability is achieved, and intelligent degrees are high.

Description

technical field [0001] The invention belongs to an electric switch, in particular to a switching switch for a capacitor in a low-voltage reactive power compensation device. Background technique [0002] At present, the capacitive switching switch used in the non-functional rate compensation device mainly adopts the AC contactor switch, which has poor operating dynamic characteristics, long switching time, large switching inrush current, operating overvoltage, heavy arcing, and poor reliability. Short life: When the electromagnetic switch is connecting or breaking the capacitor, the contact vibration and arcing phenomenon will cause contact corrosion, electromagnetic interference and power loss, making its electrical life lower than the mechanical life, not only need to be replaced frequently, Moreover, the reliability of the operation of the reactive power compensation device is greatly reduced. Although the solid-state relay mainly composed of power electronic switching de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/18
CPCY02E40/30
Inventor 叶金叶光岩王家祥
Owner LIUZHOU ELECTRICAL APP RES INST
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