CN1079588A - Bridging type power supply open-phase protection circuit and device - Google Patents

Bridging type power supply open-phase protection circuit and device Download PDF

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Publication number
CN1079588A
CN1079588A CN 93106286 CN93106286A CN1079588A CN 1079588 A CN1079588 A CN 1079588A CN 93106286 CN93106286 CN 93106286 CN 93106286 A CN93106286 A CN 93106286A CN 1079588 A CN1079588 A CN 1079588A
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China
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circuit
contact
normally opened
normally
opened contact
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CN 93106286
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CN1032996C (en
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刘桂荣
冯德义
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Feng Deyi
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Priority to CN 93106286 priority Critical patent/CN1032996C/en
Publication of CN1079588A publication Critical patent/CN1079588A/en
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Publication of CN1032996C publication Critical patent/CN1032996C/en
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Abstract

A kind of bridging type power supply open-phase protection circuit and device; its circuit is to constitute the circuit of putting up a bridge from put up a bridge circuit and he by auxiliary relay, phase failure relay and contact thereof; the bridging type circuit design is combined in the various starting device of motor circuit, forms the various starting device of motor with phase failure protection function.This circuit and device have functions such as open phase protection, control electric motor starting, minimizing starting current, control motor underloading electricity.

Description

Bridging type power supply open-phase protection circuit and device
The present invention is a kind of starting device with phase failure protection function, bridging type power supply open-phase protection circuit and device.
Present existing starting device of motor, majority sets up separately for starting device of motor and power supply open phase protection.The power supply open phase protection takes magnet ring or iron-core coil to be connected in the electric power loop; when open phase fault takes place; coil is from electric power loop; detect phase failure signal; sense in the secondary coil, be input to protective circuit, by such as the current parameters balance; negative sequence voltage phase failure input, treatment system are finished defencive function.Because in protective circuit, take miniature relay, it is low that voltage is born in the contact, it is unreliable easily to puncture, move, fragile motor.
Starting device of motor has simple type and two kinds of Y-△ of complexity starting device, and simple type adopts delay cell control Y and △ conversion, does not have protective circuit, function singleness; Complexity adopts delay cell and current sensing means, constitutes input, treatment system, control Y and △ conversion.All there is more shortcoming in these two kinds of structures, when certain vibration wave relates to delay cell and current sensing means, when Y is converted to △, easily produces short circuit and burn starting device.Circuit adopts more electronic component in addition, fragile, poor reliability; The circuit structure complexity, maintenance difficult, cost height are difficult for promoting the use of.
The objective of the invention is to propose a kind of bridging type power supply open-phase protection circuit and the device that can finish electric motor starting operation, conversion and defencive function simultaneously, overcome the shortcoming that existing starting device of motor exists.
Major technique content of the present invention is; this bridging type power supply open-phase protection circuit and device are with bridging type power supply open-phase protection circuit, and design is combined in the two Y-△ starting device circuit of motor; constitute one, become two Y-△ multi-function motor starting devices with open phase protection.
Open-phase protection circuit, by phase failure relay ZD, its normally opened contact ZD 1, ZD 2With normally-closed contact ZD 3Formation is from the bridging type circuit, with the normally-closed contact ZC of auxiliary relay ZC 4Constitute its bridging type power supply open-phase protection circuit; Two Y-△ circuit are by Y wiring contactor YC, delta connection contactor SC, auxiliary relay ZC and corresponding contact, stop button TA, starting button QA, change over switch HK, translation and protection device XK 1, XK 2Constitute; By carrying out relay DC, input relay DQ, current detecting relay DL and corresponding contacts, input button SA, current transformer ILH constitute overload protecting circuit; By phase failure relay normally-closed contact ZD 3, normally opened contact ZD 2Normally-closed contact ZC with auxiliary relay ZC 4, open-phase protection circuit is connected with two Y-△ circuit, relay ZD is that the phase failure monitors normally opened contact ZD 2Do open phase protection action control, two Y-△ circuit are held concurrently and are carried out the function of cutting off the electricity supply, and by same button QA control, make open-phase protection circuit and two Y-△ circuit operation, constitute bridging type power supply open-phase protection circuit and device.
The present invention compared with the prior art, bridging type power protecting circuit of the present invention directly is connected with power supply, the influence of not examined signal power, as long as open phase fault takes place, phase failure relay is action just, cuts off the electricity supply immediately; Two Y-△ circuit are taked logical circuit " with door " switch, control Y and △ bi-directional conversion.Have two Y-△ functions.Above-mentioned two kinds of circuit are provided with input, treatment system, and bridging type power supply open-phase protection circuit can design to be combined in two Y-△ circuit and constitutes one, has two Y-△ multi-function motor starting devices of open phase protection.Circuit structure is simple, easy to maintenance, cost is low, be active in one's movements reliable, versatility is good, be convenient to penetration and promotion and use, both can easyly be installed in the various starting device of motor, can design again in various starting device of motor circuit, be widely used, satisfy the various ways needs.
Accompanying drawing 1 is circuit theory diagrams of the present invention.
V AV BV CThree phase mains, ZD phase failure relay, ZD 1ZD 2Normally opened contact, ZD 3Normally-closed contact, TA stop button, QA starting button, HK change over switch, YC contactor, YC 2YC 4Normally opened contact, YC 1YC 3Normally-closed contact, XK 1Translation and protection device, SC contactor, SC 2SC 4Normally opened contact, SC 1SC 3Normally-closed contact, XK 2Translation and protection device, ZC auxiliary relay, ZC 1ZC 2ZC 3Normally opened contact, DQ drop into relay, DQ 1DQ 2Normally opened contact, SA drop into button, DC carries out relay, DC 2DC 3Normally opened contact, DC 1Normally-closed contact, DL current sensing means, DL 1Normally opened contact, ILH current transformer.
Open-phase protection circuit connects, normally opened contact ZD 1Meet stop button TA, another termination power of stop button V A, ZD 1Another termination phase failure relay ZD coil one end, another termination power of ZD coil V B, normally opened contact ZD 4One end phase failure relay ZD coil, one end, ZC 4Another termination normally-closed contact ZD 3, ZD 3Another termination starting button QA, normally opened contact ZD 2One termination power V C, the two Y-△ circuit of another termination.
Two Y-△ circuit connect, starting button QA one termination stop button TA, and the other end links to each other with contactor YC coil one end, and the YC coil other end meets conversion protector XK 1, XK 1Another termination normally-closed contact SC 1, SC 1Another termination normally opened contact ZD 2, ZD 2Also with normally-closed contact SC 1, YC 1With normally opened contact SC 2, YC 2, ZC 1, DQ 2, DC 3Be connected ZD 2Another termination power V C, normally-closed contact YC 3One termination XK 1, another termination normally-closed contact SC 1Normally opened contact ZC 2One termination stop button TA, ZC 2Another termination normally-closed contact DC 1, DC 1The other end connects conversion switch HK moving contact, and HK fixed contact Y links to each other with contactor YC, and HK fixed contact △ links to each other with contactor SC, normally opened contact DC 2One termination normally opened contact ZC 2, the other end links to each other with contactor SC coil, and the SC coil other end meets conversion protector XK 2, XK 2Another termination normally opened contact ZC 3, ZC 3Another termination normally-closed contact YC 1, YC 1Another termination normally opened contact ZD 2, normally-closed contact YC in addition 3One termination XK 2, another termination normally opened contact ZC 3, the normally opened contact SC of contactor SC 2One end links to each other SC with contactor SC coil 2Another termination normally opened contact ZD 2Auxiliary relay ZC coil one termination stop button TA, another termination normally opened contact of ZC coil YC 2, YC 2Another termination normally opened contact ZD 2, normally opened contact ZC in addition 1Be connected in parallel on normally opened contact YC 2On the two ends.
Be provided with overload protecting circuit in two Y-△ circuit, its circuit is for dropping into button SA one termination change over switch HK fixed contact Y, and another termination drops into relay DQ coil one end, another termination normally-closed contact of DQ coil SC 1, drop into the button two ends and normally opened contact DQ arranged in addition 1Carry out relay DC coil one termination stop button TA, another termination normally opened contact of DC coil DL 1, DL 1Another termination normally opened contact DQ 2, DQ 2Another termination normally opened contact ZD 2Normally opened contact DC 3One termination is carried out relay DC coil, another termination normally opened contact ZD 2Current detecting relay DL coil two ends are connected in parallel on current transformer ILH secondary coil two ends, and the elementary of ILH current transformer is connected in the motor load loop.
The course of work of the present invention is:
The starting button QA time-lag action of holding concurrently, control contactor YC continues conduction time, is convenient to determine flexibly the starting time, the control electric motor starting, delay time, change over to operation, open phase protection enters 4 kinds of functions that the phase failure monitors, finish 3 circuit and control; Change over switch HK has mode, control motor wiring Y and the △ bi-directional conversion function of selecting electric motor starting.
When motor step-down Y-△ starts, at first change over switch HK moving contact is placed the △ position, press starting button QA, the phase failure relay ZD adhesive of switching on, normally opened contact ZD 1Closed self-sustaining enters the phase failure and monitors normally-closed contact ZD 3Disjunction, cut-out is connected with other circuit, treats auxiliary relay ZD normally-closed contact ZC 4Disjunction guarantees that this loop open circuit is reliable.Normally opened contact ZD 2Closure, energized, contactor YC continues energising adhesive, normally-closed contact YC 1, YC 3Disjunction, contactor SC coil opens circuit and is failure to actuate, normally opened contact YC 4Closure, motor place Y wiring operation, normally opened contact YC 2Closure, the auxiliary relay ZC adhesive of switching on, normally opened contact ZC 1Closed self-sustaining, normally opened contact ZC 2, ZC 3Closed.Button QA resets, and delayed firing finishes, the contactor YC release of cutting off the power supply, normally opened contact YC 4Disjunction, normally-closed contact YC 1Recover closed, after normally-closed contact recovers closure fully, contact YC 3Connect good XK 2During conducting, the contactor SC adhesive of switching on, normally opened contact SC 2Closed self-sustaining, normally-closed contact SC 1, SC 3Disjunction, normally opened contact SC 4Closure, the motor wiring is converted to △ by Y, finishes motor Y-△ starting operation.
When motor Y across-the-line starting moves, at first change over switch HK moving contact is placed the Y position, press starting button QA, starting process as mentioned above because normally opened contact ZC 2, normally-closed contact DC 1Closure, change over switch HK moving contact places the Y position, and YC provides self-sustaining for contactor, and contactor SC is failure to actuate, and motor is in the Y operation.
When motor Y in service and △ conversion, realize by change over switch HL.Change over switch HK places △ position and fixed contact Y disjunction, and contactor YC end electricity discharges normally opened contact YC 4Disjunction, the contactor SC adhesive of switching on, normally opened contact SC 4Closure, the motor wiring is converted to △ by Y; When change over switch HK places Y position and fixed contact △ disjunction, the contactor SC release of cutting off the power supply, normally opened contact SC 4Disjunction, the contactor YC adhesive of switching on, normally opened contact YC 4Closure, the motor wiring is converted to Y by △.Historical facts or anecdotes is now controlled motor Y in service and the mutual bi-directional conversion of △.
Power supply open phase protection course of action, the phase power supply V among three phase mains ADuring the phase failure, the phase failure relay ZD release of cutting off the power supply, normally opened contact ZD 1Disjunction, normally opened contact ZD 2Disjunction, power supply V CBe cut off, contactor YC or contactor SC outage discharge normally opened contact YC 4Or SC 4Disjunction, the protection motor of cutting off the electricity supply; Phase power supply V among three phase mains BDuring the phase failure, the phase failure relay ZD release of cutting off the power supply, normally opened contact ZD 1Disjunction, normally opened contact ZD 2Disjunction, V cuts off the electricity supply C, contactor YC or contactor SC outage discharge normally opened contact YC 4Or SC 4Motor power protection motor is cut off in disjunction; Phase power supply V among three phase mains CDuring the phase failure, normally opened contact ZD 2Be equivalent to disjunction, contactor YC or contactor SC outage discharge normally opened contact YC 4Or SC 4Motor power protection motor is cut off in disjunction.Motor is in service, and when open phase fault takes place, the protection motor of all cutting off the electricity supply.
Overload protection is pressed and is dropped into button SA, drops into relay DQ energising adhesive, normally opened contact DQ 1Closed self-sustaining, normally opened contact DQ 2Closure, when load current surpasses electric current electric detection means action tuning current, normally opened contact DL 1Closure is carried out relay DC energising adhesive, normally opened contact DC 3Closed self-sustaining, normally-closed contact DC 1Normally opened contact DC in the time of disjunction 2Closure makes contactor YC outage discharge back contactor SC energising adhesive, normally opened contact YC 4Disjunction, normally opened contact SC 4Closure, the motor wiring is converted to the △ operation by Y, and the protection motor is avoided overload and is continued operation.
Stop case button TA and control whole operating states.

Claims (3)

1, a kind of bridging type power supply open-phase protection circuit is characterized in that, this circuit is made up of auxiliary relay and phase failure relay and their contact, phase failure relay ZD and its normally opened contact ZD 1, ZD 2With normally-closed contact ZD 3Constitute from putting up a bridge circuit, with the normally-closed contact ZC of auxiliary relay or contactor 4Constitute its bridging circuit, the bridging circuit design is combined in the various starting device of motor circuit, forms the various starting device of motor with open phase protection, and its connected mode is normally opened contact ZD 1Meet stop button TA, another termination power of stop button V A, ZD 1Another termination phase failure relay ZD coil one end, another termination power of ZD coil V B, normally opened contact ZC 4One termination phase failure relay ZD coil, one end, ZC 4Another termination normally-closed contact ZD 3, ZD 3Another termination starting button QA, normally opened contact ZD 2One termination power V C
2, bridging type power supply open phase protection is to be made of bridging type power supply open-phase protection circuit and two Y-△ circuit, it is characterized in that the design of bridging type power supply open-phase protection circuit is combined in two Y-△ circuit and forms as one; Two Y-△ circuit are by Y wiring contactor YC, delta connection contactor SC, auxiliary relay ZC and corresponding contact, stop button TA, starting button QA, change over switch HK, translation and protection device XK 1, XK 2Constitute; Phase failure relay normally-closed contact ZD 3, normally opened contact ZD 2With auxiliary relay normally-closed contact ZC 4, open-phase protection circuit is connected with two Y-△ circuit, relay ZD is that the phase failure monitors normally opened contact XD 2Do open phase protection action control, two Y-△ circuit are held concurrently to carry out and are cut off the electricity supply, and by same button QA control, make open-phase protection circuit and two Y-△ circuit operation, constitute bridging type power supply open-phase protection circuit and device.
3, the described bridging type power supply of claim 2 open phase protection is characterized in that, the starting button QA one termination stop button TA of two Y-△ circuit, and the other end links to each other with contactor YC coil one end, and the YC coil other end meets conversion protector XK 1, XK 1Another termination normally-closed contact SC 1, SC 1Another termination normally opened contact ZD 2, ZD 2Also with normally-closed contact SC 1, YC 1With normally opened contact SC 2, YC 2, ZC 1, DQ 2, DC 3Be connected ZD 2Another termination power V C, normally-closed contact YC 3One termination XK 1, another termination normally-closed contact SC 1; Normally opened contact ZC 2One termination stop button TA, ZC 2Another termination normally-closed contact DC 1, DC 1The other end connects conversion switch HK moving contact, and HK fixed contact Y links to each other with contactor YC, and HK fixed contact △ links to each other with contactor SC, normally opened contact DC 2, the other end links to each other with contactor SC coil, and the SC coil other end meets conversion protector XK 2, XK 2The normal contact ZC of another termination 3, ZC 3Another termination normally-closed contact YC 1, YC 1Another termination normally opened contact ZD 2, normally-closed contact YC in addition 3One termination XK 2, other is termination normally opened contact ZC 3, the normally opened contact SC of contactor SC 2One end links to each other SC with contactor SC coil 2Another termination normally opened contact ZD 2, auxiliary relay ZC coil one termination stop button TA, another termination normally opened contact of ZC relay coil YC 2, YC 2Another termination normally opened contact ZD 2, auxiliary relay normally opened contact ZC in addition 1Be connected in parallel on normally opened contact YC 2Two ends.
CN 93106286 1993-05-26 1993-05-26 Cross-bridge type open-phase protection circuit of power supply and its protection device Expired - Fee Related CN1032996C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 93106286 CN1032996C (en) 1993-05-26 1993-05-26 Cross-bridge type open-phase protection circuit of power supply and its protection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 93106286 CN1032996C (en) 1993-05-26 1993-05-26 Cross-bridge type open-phase protection circuit of power supply and its protection device

Publications (2)

Publication Number Publication Date
CN1079588A true CN1079588A (en) 1993-12-15
CN1032996C CN1032996C (en) 1996-10-09

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ID=4986156

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Application Number Title Priority Date Filing Date
CN 93106286 Expired - Fee Related CN1032996C (en) 1993-05-26 1993-05-26 Cross-bridge type open-phase protection circuit of power supply and its protection device

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105071340A (en) * 2015-08-05 2015-11-18 山西太钢不锈钢股份有限公司 Power phase failure protection apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105071340A (en) * 2015-08-05 2015-11-18 山西太钢不锈钢股份有限公司 Power phase failure protection apparatus
CN105071340B (en) * 2015-08-05 2017-12-01 山西太钢不锈钢股份有限公司 A kind of protection device of power phase shortage

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CN1032996C (en) 1996-10-09

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Owner name: FENG DEYI

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