CN201038732Y - Electrical equipment protecting device - Google Patents

Electrical equipment protecting device Download PDF

Info

Publication number
CN201038732Y
CN201038732Y CNU2007201014295U CN200720101429U CN201038732Y CN 201038732 Y CN201038732 Y CN 201038732Y CN U2007201014295 U CNU2007201014295 U CN U2007201014295U CN 200720101429 U CN200720101429 U CN 200720101429U CN 201038732 Y CN201038732 Y CN 201038732Y
Authority
CN
China
Prior art keywords
phase
relay
serially connected
winding
contactor
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
CNU2007201014295U
Other languages
Chinese (zh)
Inventor
王彦军
Original Assignee
王彦军
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 王彦军 filed Critical 王彦军
Priority to CNU2007201014295U priority Critical patent/CN201038732Y/en
Application granted granted Critical
Publication of CN201038732Y publication Critical patent/CN201038732Y/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Abstract

The utility model relates to an electric protecting device. Three phases of power supplying circuits are serially connected with the normally open contact of an alternating current contactor CJ; the coil spur track of the alternating current contactor is connected between two phases of power supplying circuits; the three input ends of a phase failure phase sequence protector are respectively connected with the three phases of power supplying circuits; the normally open contact of the phase failure phase sequence protector is serially connected on the coil spur track of the alternating current contactor; a voltage relay DY is respectively serially connected between each phase of circuit and the zero wire; the normally open contacts of the voltage relays are serially connected with the coil spur track of a middle relay ZJ after parallel connection; the contact parallel connected spur track of the voltage relay is still parallelly connected with a spur track which is serially connected with the normally open contact of the middle relay and a stopping switch TA; the coil spur track of the alternating current contactor is internally and serially connected with a switch KG and the normally closed contact of the middle relay. The utility model can protect the phenomena such as phase breaking, wrong connection of the phase wire and zero wire, or burnt zero wire and so on.

Description

Electric protective device
Technical field
The utility model relates to a kind of electric equipment power supply protection device, specifically a kind of electric protective device that is used for the three-phase four-wire low-voltage electric power system.
Background technology
Following phenomenon often takes place in the user in the supply line that uses the three-phase four-wire low-voltage electric power system: the one, and the phase sequence misconnection makes the electric equipment cisco unity malfunction or causes damage; The 2nd, phase line and zero line misconnection cause electric equipment to burn; The 3rd, zero line blows, and the three-phase load imbalance is burnt electrical appliance.The generation of these phenomenons has all caused very big economic loss for user and power supply enterprise.Conventional electric protective device generally is a normally opened contact that is connected in series A.C. contactor in three-phase power line respectively, and the path of winding of A.C. contactor and action element of being correlated with and switch etc. are connected between the two-phase supply line.The defencive function of this class protective device is all not too comprehensive, for the electric equipment that has strict phase sequence to require, throws device etc. mutually as deep well pump, elevator and dual power supply, all can not implement protection when the phase sequence wrong usually, causes device damage.
The utility model content
The purpose of this utility model just provides and a kind ofly in supply line the phase failure, phase line and zero line misconnection or the disconnected multifunctional electric protective device that all can play a protective role when zero takes place.
The utility model is achieved in that a kind of electric protective device, in three-phase power line, be connected in series a normally opened contact of A.C. contactor respectively, the path of winding of A.C. contactor is connected between the two-phase supply line, three inputs of phase failure phase sequence relay join with three-phase power line respectively, and the normally opened contact of phase failure phase sequence relay is serially connected on the path of winding of A.C. contactor; Between every phase circuit of three-phase power line and zero line, be connected to a voltage relay respectively, be serially connected in the path of winding of auxiliary relay after each normally opened contact of three voltage relays is parallel with one another, the path of winding of auxiliary relay is connected between the two-phase supply line, the normally opened contact of a serial connection auxiliary relay also in parallel and the branch road of shutdown switch on three contact parallel branches of voltage relay; In the path of winding of A.C. contactor, also be serially connected with the normally-closed contact of switch and auxiliary relay.
Different situations such as the phase failure, phase line and zero line misconnection that the utility model takes place supply line or zero line blow all can play a protective role, and defencive function is many; And the utility model is not only applicable in the low-voltage power system of three-phase four-wire system, and after changing component parameter, also applicable to the high pressure open phase protection.
Description of drawings
Fig. 1 is an electrical schematic diagram of the present utility model.
Embodiment
As shown in Figure 1, the utility model is a normally opened contact CJ who is connected in series A.C. contactor CJ in A, B, C three-phase power line respectively 1, CJ 2, CJ 3, the path of winding of A.C. contactor CJ is connected between A, the C two-phase supply line, and three inputs of phase failure phase sequence relay XJ join with A, B, C three-phase power line respectively, the normally opened contact XJ of phase failure phase sequence relay XJ 2Be serially connected on the path of winding of above-mentioned A.C. contactor CJ.Between every phase circuit of A, B, C three-phase power line and zero line N, be connected to voltage relay 1DY, a 2DY, 3DY respectively, each normally opened contact 1DY of three voltage relays 1, 2DY 1And 3DY 1After parallel with one another, be serially connected in the path of winding of intermediate relay ZJ.The path of winding of intermediate relay ZJ is connected between A, the C two-phase supply line.On the three contact parallel branches of the voltage relay that in the path of winding of intermediate relay ZJ, is connected in series, also be parallel with a normally opened contact ZJ who is being connected in series intermediate relay ZJ 1Branch road with shutdown switch TA.In the path of winding of A.C. contactor CJ, also be serially connected with the normally-closed contact ZJ of K switch G and intermediate relay ZJ 2
The protection course of work of the present utility model is: if phase sequence misconnection, phase line and zero line misconnection, when perhaps having phase failure situation to take place, phase failure phase sequence relay XJ action, the normally opened contact XJ of phase failure phase sequence relay 2Disconnect the path of winding of A.C. contactor CJ, the main contacts that makes A.C. contactor is normally opened contact CJ 1, CJ 2And CJ 3Disconnect, cut off load power.After pending fault disposes, automatic recovery of power supply.
If when having the zero line situation of blowing to take place, the three-phase load imbalance is connected the minimum voltage relay DY who goes up mutually of load and moves its normally opened contact (1DY because of surpassing definite value 1, 2DY 1, 3DY 1In one) closure, it is electric that the path of winding of intermediate relay ZJ is got, the normally-closed contact ZJ of intermediate relay ZJ 2Disconnect the coil losing electricity of A.C. contactor CJ, the main contacts CJ of A.C. contactor 1, CJ 2And CJ 3Disconnect, cut off load power.Meanwhile, the normally opened contact ZJ of intermediate relay ZJ 1Closure makes intermediate relay ZJ be in the self-sustaining state.After pending fault disposes, press stop button TA, the coil losing electricity of intermediate relay ZJ, its normally-closed contact ZJ 2Closure, it is electric that the coil that exchanges contact device CJ is got, the main contacts CJ of A.C. contactor 1, CJ 2And CJ 3Closure, the power supply that recovers electric equipment.
The utility model also is connected to indicator light HD between A, B two-phase supply line 1With phase failure phase sequence relay normally-closed contact XJ 1The serial connection branch road.If phase failure phase sequence relay XJ action, its normally-closed contact XJ 1Closure, indicator light HD 1Promptly light, this moment, promptly phase sequence misconnection, phase line and zero line misconnection appearred in expression, perhaps had phase failure situation to take place, and reminded the fault detect and the processing of being correlated with.
The utility model also is connected to indicator light HD between A, C two-phase supply line 2With auxiliary relay normally opened contact ZJ 3The serial connection branch road.As long as intermediate relay ZJ gets electronic work, its normally opened contact ZJ 3Closure, indicator light HD 2Promptly light, the situation that this moment, i.e. expression had zero line to blow takes place, and reminds the fault detect and the processing of being correlated with.

Claims (3)

1. electric protective device that is used for the three-phase four-wire low-voltage electric power system is connected in series the normally opened contact (CJ of A.C. contactor CJ respectively in A, B, C three-phase power line 1, CJ 2, CJ 3), the path of winding of A.C. contactor CJ is connected between the two-phase supply line, it is characterized in that three inputs of phase failure phase sequence relay XJ join with A, B, C three-phase power line respectively, the normally opened contact XJ of phase failure phase sequence relay XJ 2Be serially connected on the path of winding of A.C. contactor CJ; Between every phase circuit of three-phase power line and zero line N, be connected to a voltage relay (1DY, 2DY, 3DY) respectively, each normally opened contact (1DY of three voltage relays 1, 2DY 1, 3DY 1) be serially connected in the path of winding of intermediate relay ZJ after parallel with one another, the path of winding of intermediate relay ZJ is connected between the two-phase supply line, the normally opened contact ZJ of a serial connection intermediate relay ZJ also in parallel on three contact parallel branches of voltage relay 1Branch road with shutdown switch TA; In the path of winding of A.C. contactor CJ, also be serially connected with the normally-closed contact ZJ of K switch G and intermediate relay ZJ 2
2. electric protective device according to claim 1 is characterized in that being connected to indicator light HD between A, B two-phase supply line 1With phase failure phase sequence relay normally-closed contact XJ 1The serial connection branch road.
3. electric protective device according to claim 1 is characterized in that being connected to indicator light HD between A, C two-phase supply line 2With auxiliary relay normally opened contact ZJ 3The serial connection branch road.
CNU2007201014295U 2007-05-25 2007-05-25 Electrical equipment protecting device Expired - Fee Related CN201038732Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNU2007201014295U CN201038732Y (en) 2007-05-25 2007-05-25 Electrical equipment protecting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNU2007201014295U CN201038732Y (en) 2007-05-25 2007-05-25 Electrical equipment protecting device

Publications (1)

Publication Number Publication Date
CN201038732Y true CN201038732Y (en) 2008-03-19

Family

ID=39211256

Family Applications (1)

Application Number Title Priority Date Filing Date
CNU2007201014295U Expired - Fee Related CN201038732Y (en) 2007-05-25 2007-05-25 Electrical equipment protecting device

Country Status (1)

Country Link
CN (1) CN201038732Y (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103085170A (en) * 2013-01-11 2013-05-08 蚌埠日月仪器研究所有限公司 Metering control device for dry-mixed mortar storage tank
CN103441466A (en) * 2013-08-16 2013-12-11 湛江开关有限公司 Automatic phase-failure zero-failure power-off protection device
CN103986119A (en) * 2014-05-30 2014-08-13 国家电网公司 Null line lack and breakage automatic protection device
CN104065035A (en) * 2014-06-26 2014-09-24 河南开启电力实业有限公司 Distribution transformer neutral line breaking protection device

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103085170A (en) * 2013-01-11 2013-05-08 蚌埠日月仪器研究所有限公司 Metering control device for dry-mixed mortar storage tank
CN103085170B (en) * 2013-01-11 2015-01-21 蚌埠日月仪器研究所有限公司 Metering control device for dry-mixed mortar storage tank
CN103441466A (en) * 2013-08-16 2013-12-11 湛江开关有限公司 Automatic phase-failure zero-failure power-off protection device
CN103441466B (en) * 2013-08-16 2015-09-30 湛江开关有限公司 A kind of Automatic phase-failure zero-failure power-off protection
CN103986119A (en) * 2014-05-30 2014-08-13 国家电网公司 Null line lack and breakage automatic protection device
CN103986119B (en) * 2014-05-30 2017-06-20 国家电网公司 Lack zero, automatic safety device off zero
CN104065035A (en) * 2014-06-26 2014-09-24 河南开启电力实业有限公司 Distribution transformer neutral line breaking protection device

Similar Documents

Publication Publication Date Title
CN107134762B (en) A kind of based superconductive current limliting without arc dc circuit breaker and cutoff method
CN103839710B (en) A kind of mixed type dc circuit breaker
CN102005720B (en) Neutral line breakage detection protection method and device
CN201038732Y (en) Electrical equipment protecting device
CN102780206A (en) Electric leakage detection protecting circuit
CN103427392B (en) A kind of electric system protection device
CN101867181A (en) Wiring protection device
CN203352192U (en) Direct current switch device
CN202586265U (en) Power system protection device
CN103311889A (en) Manual switching protection circuit for dual power supplies
CN205123236U (en) Distribution lines protection device
CN201146366Y (en) Shunt-opening tripping type equipment for protecting single-phase short circuit
CN2907083Y (en) Soft starter for high power industrial frequency transformer
CN202004530U (en) Electromechanical integrated double-power supply automatic transfer switch
CN207442421U (en) A kind of microcomputer protecting device
CN103532111A (en) Incoming line and outgoing line protector of switching station
CN100576674C (en) A kind of method and circuit breaker thereof that makes earth leakage protection without action dead region
CN201181682Y (en) Multifunctional small circuit breaker
CN108054732B (en) The holding circuit of high-speed circuit breaker
CN202333748U (en) Three-phase four-wire null line breakdown protection device
CN201204570Y (en) AC contactless control switch
CN202455043U (en) Three-phase motor tail-end phase failure protective device
CN203707798U (en) Line-side soft start circuit of converter
CN103545795A (en) Breaker tripping protector
CN203659763U (en) Main air switch

Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20080319

Termination date: 20100525