CN203617686U - Simple control circuit for open-phase protection - Google Patents

Simple control circuit for open-phase protection Download PDF

Info

Publication number
CN203617686U
CN203617686U CN201320670059.2U CN201320670059U CN203617686U CN 203617686 U CN203617686 U CN 203617686U CN 201320670059 U CN201320670059 U CN 201320670059U CN 203617686 U CN203617686 U CN 203617686U
Authority
CN
China
Prior art keywords
auxiliary relay
coil
open
control circuit
phase protection
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201320670059.2U
Other languages
Chinese (zh)
Inventor
李志中
涂仁涛
赵发权
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HUBEI BOYUAN ELECTRICAL TECHNOLOGY Co Ltd
Original Assignee
HUBEI BOYUAN ELECTRICAL TECHNOLOGY Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by HUBEI BOYUAN ELECTRICAL TECHNOLOGY Co Ltd filed Critical HUBEI BOYUAN ELECTRICAL TECHNOLOGY Co Ltd
Priority to CN201320670059.2U priority Critical patent/CN203617686U/en
Application granted granted Critical
Publication of CN203617686U publication Critical patent/CN203617686U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The utility model provides a simple control circuit for open-phase protection. The simple control circuit comprises main power lines L1, L2 and L3, intermediate relays KA1 and KA2, an air switch QS, a load contactor KM, and button switches SB1 and SB2. The simple control circuit is characterized in that power supplies of control lines L1, L2 and L3 are connected to the corresponding main power lines under the air switch QS; the coil of the intermediate relay KA1 is connected on the control lines L1 and L2; the coil of the intermediate relay KA2 is connected on the control lines L2 and L3; the normally-open points of the intermediate relays KA1 and KA2 are connected above the coil of the load contactor KM in series; and when the air switch QS is closed, the coils of the intermediate relays KA1 and KA2 are powered to be attracted and closed, the normally-closed points of the intermediate relays KA1 and KA2 are closed, the button switch SB2 is pressed down, the contactor KM is attracted and closed, and the load works.

Description

The simple control circuit of a kind of open-phase protection
Technical field
The utility model relates to the simple control circuit of a kind of open-phase protection that electric power system is used, and belongs to electrical equipment technical field.
Background technology
At present motor and circuit open-phase protection mainly use be open phase protector; while installation due to open phase protector, need the main line of power supply from open phase protector coil, to pass; install very inconvenient; and open phase protector identification circuit mostly is electronic original part; voltage and operational environment are had relatively high expectations; fragile in work, do not reach the effect of protection.
The utility model patent " a kind of motor phase failure protection circuit " that for example application number is 201220352839.8, a kind of motor phase failure protection circuit is disclosed, comprise three phase mains testing circuit, optocoupler circuits for triggering, single chip machine controlling circuit and drive circuit, the output signal of described three phase mains testing circuit transfers to single chip machine controlling circuit through optocoupler circuits for triggering, the output signal control of described single chip machine controlling circuit is sent to drive circuit, in the time there is phase shortage, corresponding mutually non-inductive voltage output, optocoupler is in cut-off state, judge back driving circuit through single-chip microcomputer, cut off motor power, when motor is because of the overweight adstante febre of load, its operating current will increase, in the time that its operating current exceedes set point, thermal relay will move, its normally-closed contact will disconnect, and A.C. contactor power-off is discharged, and cut off the power supply of motor, prevent that motor, because overload damages, is suitable for the open phase protection of middle-size and small-size three-phase alternating-current motor.But it is still depositing complex structure this control circuit, the many costs of components and parts are high, and it is of limited application.
In view of this, be necessary to provide a kind of open-phase protection simple control circuit, to address the above problem.
Summary of the invention
The purpose of this utility model is: the technical problem existing for solving known technology, and provide a kind of open-phase protection simple control circuit, adopt auxiliary relay to control open-phase protection, the cheap cost of components and parts is low.
The technical scheme that the utility model adopts is: the simple control circuit of a kind of open-phase protection, comprise main power line L1, L2, L3, auxiliary relay KA1, KA2, air switch QS, load contactor KM, push-button switch SB1, SB2, it is characterized in that, power supply L1, the L2 of control circuit, L3 are connected on main power line corresponding under air switch QS, and it is upper that the coil of auxiliary relay KA1 is connected on control line L1, L2, and the coil of auxiliary relay KA2 is connected on control line L2, L3; Be connected on the coil top of load contactor KM the normal battle of control circuit auxiliary relay KA1, KA2, air switch QS closes, the coil of auxiliary relay KA1, KA2 obtains electric adhesive, the normal battle of auxiliary relay KA1, KA2 is closed, press the button switch S B2, contactor KM adhesive, loaded work piece.
The simple control circuit of open-phase protection as above, is characterized in that, auxiliary relay KA1, KA2 are the auxiliary relay of the JZ7-44 model of coil voltage 380V.
The beneficial effects of the utility model are: the utility model adopts auxiliary relay to control open-phase protection, and this circuit wiring is simple, and original paper low price, easily purchases, and can reach good control effect after installation.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the simple control circuit of open-phase protection of the present utility model.
Embodiment
In order to understand better the utility model, further illustrate content of the present utility model below in conjunction with embodiment, but content of the present utility model is not only confined to the following examples.Those skilled in the art can make various changes or modifications the utility model, and these equivalent form of values are equally within the listed claims limited range of the application.
Symbol description in accompanying drawing: main power line L1, L2, L3; Auxiliary relay KA1, KA2; Air switch QS; Load contactor KM; Push-button switch SB1, SB2; Fuse FU1, FU2, FU3; Thermal relay FR; Green light HG, red light HR.
Fig. 1 is the schematic diagram of the simple control circuit of open-phase protection of the present utility model.Comprise main power line L1, L2, L3; Auxiliary relay KA1, KA2; Air switch QS; Load contactor KM; Push-button switch SB1, SB2; Fuse FU1, FU2, FU3; Thermal relay FR; The elements such as green light HG, red light HR.Wherein auxiliary relay KA1, KA2 are the auxiliary relay of the JZ7-44 model of coil voltage 380V.
Control mode: power supply L1, L2, the L3 of control circuit are connected on main power line corresponding under air switch QS, and it is upper that the coil of auxiliary relay KA1 is connected on control line L1, L2, and the coil of auxiliary relay KA2 is connected on control line L2, L3.The coil top that is connected on load contactor KM the normal battle of auxiliary relay KA1, KA2, the sky that closes is opened QS, and the coil of auxiliary relay KA1, KA2 obtains electric adhesive, the normal battle of auxiliary relay KA1, KA2 is closed, press SB2, contactor KM adhesive, loaded work piece.When L1, L2, L3 have one to open circuit mutually, the coil of auxiliary relay KA1, KA2 must have a disconnection, and must have a disconnection the normal battle of auxiliary relay KA1, KA2; the coil losing electricity of load contactor KM; KM main contacts disconnects, and load quits work, and reaches the effect of open-phase protection.
These are only embodiment of the present utility model, be not limited to the utility model, therefore, all within spirit of the present utility model and principle, any modification of making, be equal to replacement, improvement etc., within all should being included in claim scope of the present utility model.

Claims (2)

1. the simple control circuit of open-phase protection, comprise main power line L1, L2, L3, auxiliary relay KA1, KA2, air switch QS, load contactor KM, push-button switch SB1, SB2, it is characterized in that, power supply L1, the L2 of control circuit, L3 are connected on main power line corresponding under air switch QS, and it is upper that the coil of auxiliary relay KA1 is connected on control line L1, L2, and the coil of auxiliary relay KA2 is connected on control line L2, L3; Be connected on the coil top of load contactor KM the normal battle of auxiliary relay KA1, KA2, the air switch QS that closes, the coil of auxiliary relay KA1, KA2 obtains electric adhesive, the normal battle of auxiliary relay KA1, KA2 is closed, press the button switch S B2, contactor KM adhesive, loaded work piece.
2. the simple control circuit of open-phase protection according to claim 1, is characterized in that, auxiliary relay KA1, KA2 are the auxiliary relay of the JZ7-44 model of coil voltage 380V.
CN201320670059.2U 2013-10-29 2013-10-29 Simple control circuit for open-phase protection Expired - Fee Related CN203617686U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201320670059.2U CN203617686U (en) 2013-10-29 2013-10-29 Simple control circuit for open-phase protection

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201320670059.2U CN203617686U (en) 2013-10-29 2013-10-29 Simple control circuit for open-phase protection

Publications (1)

Publication Number Publication Date
CN203617686U true CN203617686U (en) 2014-05-28

Family

ID=50770309

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201320670059.2U Expired - Fee Related CN203617686U (en) 2013-10-29 2013-10-29 Simple control circuit for open-phase protection

Country Status (1)

Country Link
CN (1) CN203617686U (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104124668A (en) * 2014-07-26 2014-10-29 徐家成 Sewage pump control circuit
CN104180044A (en) * 2014-07-26 2014-12-03 徐家成 Water inlet valve control device
CN104179669A (en) * 2014-07-26 2014-12-03 徐家成 Sewage pump control device
CN104180043A (en) * 2014-07-26 2014-12-03 徐家成 Water inlet valve control circuit
CN104599570A (en) * 2015-01-06 2015-05-06 深圳市中傲信息技术有限公司 Circuit simulation system suitable for training and examinations

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104124668A (en) * 2014-07-26 2014-10-29 徐家成 Sewage pump control circuit
CN104180044A (en) * 2014-07-26 2014-12-03 徐家成 Water inlet valve control device
CN104179669A (en) * 2014-07-26 2014-12-03 徐家成 Sewage pump control device
CN104180043A (en) * 2014-07-26 2014-12-03 徐家成 Water inlet valve control circuit
CN104599570A (en) * 2015-01-06 2015-05-06 深圳市中傲信息技术有限公司 Circuit simulation system suitable for training and examinations
CN104599570B (en) * 2015-01-06 2018-07-03 深圳市中傲信息技术有限公司 A kind of breadboardin system for being suitable for training and examination

Similar Documents

Publication Publication Date Title
CN203617686U (en) Simple control circuit for open-phase protection
CN103434899A (en) Integrated controller for elevator
CN103595037B (en) Three-phase alternating current phase sequence error correction device
CN203439864U (en) Elevator control cabinet
CN102201658A (en) Intelligent alternating-current contactor system for protecting motor
CN203352139U (en) Automatic phase change device of motor
CN201797299U (en) Reverse-power relay
CN204794028U (en) Intellectuality ac motor protector that is just reversing
CN202076778U (en) Intelligent alternating current contactor system for motor protection
CN201523222U (en) Intelligent protection switch for power distribution box
CN204167205U (en) Three-winding magnetic suck cut-offs A.C. contactor circuit
CN204167204U (en) Energy saving ac contactor circuit structure system
CN201797292U (en) Reverse power relay with overcurrent
CN204167210U (en) A.C. contactor flash device
CN203574349U (en) Vehicle power supply security control device
CN203278188U (en) Zero line breaking protection device
CN202759280U (en) Power station accident illumination system
CN201758290U (en) Automatic delay protecting local compensator
CN204376391U (en) Three-phase alternating-current motor phase shortage automatic safety device
CN201629577U (en) Intelligent compensation unit without inrush current
CN201733074U (en) Economical and practical motor open-phase protection device
CN204271615U (en) A kind of elevator motor phase protection circuit
CN204441866U (en) A kind of motor with automatic protection functions
CN207282403U (en) A kind of intelligent control and protection switch
CN205846855U (en) Power supply automatic switch-over circuit

Legal Events

Date Code Title Description
GR01 Patent grant
C14 Grant of patent or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20140528

Termination date: 20161029

CF01 Termination of patent right due to non-payment of annual fee