Automatic switching power supply circuit used in underground coal mine

A technology of automatic switching and power supply circuit, applied in circuit devices, electrical components, emergency power supply arrangements, etc., can solve problems such as underground power outages, safety accidents, misoperations, etc., to ensure reliable operation.

Inactive Publication Date: 2013-11-27
SHANXI FENXI ELECTROMECHANICAL
View PDF5 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides an automatic switching power supply circuit for underground coal mines, which solves the technical problem of safety accidents caused by underground power outages and misoperations caused by manual switching of dual power supplies in underground mines

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
  • Automatic switching power supply circuit used in underground coal mine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0009] The present invention is described in detail below in conjunction with accompanying drawing:

[0010] An automatic switching power supply circuit for underground coal mines, comprising a three-phase common power supply 1, a three-phase backup power supply 10 and a load 8, the three-phase common power supply 1 is electrically connected to one end of the main contact 6 of the main contactor, and the main contactor The other end of the main contact 6 is electrically connected to the outlet terminal 7, the three-phase backup power supply 10 is electrically connected to one end of the main contact 9 of the backup contactor, and the other end of the main contact 9 of the backup contactor is connected to the outlet terminal 7 Electrically connected, a load 8 is connected to the outlet terminal 7, one end of the coil 2 of the relay is electrically connected to the C-phase power supply of the three-phase common power supply 1, and the other end of the relay coil 2 is connected to...

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 discloses an automatic switching power supply circuit used in an underground coal mine. The automatic switching power supply circuit solves the problem that misoperation is easily caused when an existing underground double-power-supply circuit switches. The automatic switching power supply circuit is characterized in that a three-phase frequently-used power source (1) is electrically connected with a load (8) through a main contactor, a three-phase standby power source (10) is electrically connected with the load (8) through a standby contactor, a coil (2) of a relay is connected between a C-phase power source and an A-phase power source of the three-phase frequently-used power source (1) in parallel, a normally open auxiliary contact (3) of the relay, a normally closed contact (4) of the standby contactor and a coil (5) of the main contactor are connected in series to be connected between a B-phase power source and the C-phase power source of the three-phase frequently-used power source (1) in parallel, and a normally closed auxiliary contact (11) of the relay, a normally closed contact (12) of the main contactor and a coil (13) of the standby contactor are connected in series to be connected between a B-phase power source and a C-phase power source of the three-phase standby power source (10) in parallel. Automatic and reliable switching between two circuits of underground power sources is achieved.

Description

technical field [0001] The invention relates to an underground lighting circuit, in particular to a three-phase power supply circuit for automatic switching of dual power supplies for underground lighting and control in coal mines. Background technique [0002] In the underground, the lighting and control circuits used in the cavern, working face, monitoring room, intelligent console, etc. are two independent power supply devices, one is the normal power supply and the other is the backup power supply. When the three-phase power grid voltage is unstable or faulty in the common power supply, it is necessary to manually connect these devices to the backup power supply. When the console fails and the power is cut off, all states in the mine will be out of control, which may easily cause underground safety accidents. There are potential safety hazards in manual switching of power supplies, especially the misoperation of switching will cause damage to downhole equipment, especia...

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 Applications(China)
IPC IPC(8): H02J9/06
Inventor 柏永青马淑仙曹彦林李晓华陈利平赵改兰汤继胜高晓明邵莉莉陈荣海
Owner SHANXI FENXI ELECTROMECHANICAL
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