CN103326318A - Electric motor overheating delayed protection device - Google Patents
Electric motor overheating delayed protection device Download PDFInfo
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- CN103326318A CN103326318A CN2013102671190A CN201310267119A CN103326318A CN 103326318 A CN103326318 A CN 103326318A CN 2013102671190 A CN2013102671190 A CN 2013102671190A CN 201310267119 A CN201310267119 A CN 201310267119A CN 103326318 A CN103326318 A CN 103326318A
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- 238000013021 overheating Methods 0.000 title claims abstract description 13
- 230000003111 delayed effect Effects 0.000 title abstract 5
- 230000001012 protector Effects 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Abstract
The invention provides an electric motor overheating delayed protection device, and belongs to the technical field of electric motor control devices. The solved technical problem is to provide the device which can accurately control electric motor overheating delayed shut-down protection. According to the technical scheme, the electric motor overheating delayed protection device comprises a breaker DZ1, an alternating-current contactor CJ1, a thermal relay RJ1, a start button QA1, a stop button TA1, a fuse RT1, a fuse RT2, an indicator light XHD1, an indicator light XHD2, an intermediate relay ZJ1 and a time relay SJ1, wherein the wire inlet end of the breaker DZ1 is connected with a three-phase alternating-current power supply, and the wire outlet end of the breaker DZ1 is connected with a main contact CJ1.2 of the alternating-current contactor CJ1 and the thermal relay RJ1 in series and then connected with the power supply end of an electric motor D1. The electric motor overheating delayed protection device is suitable for various electric motors.
Description
Technical field
Motor overheating delay protection device of the present invention belongs to the motor control assembly technical field.
Background technology
In the production practices, reason causes overheated so that damages and burns motor because overload, winding failure or supply voltage be undesired etc. through regular meeting, has influenced the economic loss of normally carrying out, caused production unit of producing, so need carry out overtemperature protection to motor.The shortcoming that existing motor protection against overheat device exists is the setting value inconvenient debugging of heat outage, causes misoperation easily: if when transferring to specified position greater than motor, " protection " is nonsensical; If transfer to specified when position of motor, then when equipment at full capacity during long-term work, protector is understood a direct acting, makes equipment be in run-stopping status all the time.
Summary of the invention
The present invention overcomes the deficiency that prior art exists, and technical problem to be solved is: a kind of device that can accurately control motor overheating time-delay stoppage protection is provided.
For solving the problems of the technologies described above; the technical solution adopted in the present invention is: the motor overheating delay protection device; comprise: circuit breaker DZ1, A.C. contactor CJ1, thermal relay RJ1, start button QA1, stop button TA1, fuse RT1, RT2, indicator light XHD1, XHD2, intermediate relay ZJ 1 and time relay sj 1, wherein:
The coil of A.C. contactor CJ1 is CJ1.1, and its main contacts is CJ1.2, and normally opened contact is CJ1.3, and normally-closed contact is CJ1.4;
The normally opened contact of thermal relay RJ1 is RJ1.1;
The coil of intermediate relay ZJ 1 is ZJ1.1, and its normally-closed contact is ZJ1.2;
The coil of time relay sj 1 is SJ1.1, and its timing closing contact is SJ1.2;
The main circuit of motor D1 is: link to each other with the power end of motor D1 behind the main contacts CJ1.2 that the inlet wire termination three-phase alternating-current supply of described circuit breaker DZ1, the leading-out terminal of described circuit breaker DZ1 are connected in series A.C. contactor CJ1 successively and the thermal relay RJ1;
The control circuit structure of the overheated delay protection of described motor D1 is: link to each other with the control circuit positive source behind the end serial connection fuse RT1 of described stop button TA1, the other end of stop button TA1 successively and connect behind the end of normally opened contact CJ1.3 of the end of start button QA1 and A.C. contactor CJ1 with the end of the normally-closed contact CJ1.4 of A.C. contactor CJ1 and link to each other, the other end of described start button QA1 is successively and connect the other end of the normally opened contact CJ1.3 of A.C. contactor CJ1, the end of indicator light XHD1, link to each other with the end of the coil CJ1.1 of A.C. contactor CJ1 behind the end of the timing closing contact SJ1.2 of the end of the normally opened contact RJ1.1 of thermal relay RJ1 and time relay sj 1;
The other end of the coil CJ1.1 of described A.C. contactor CJ1 links to each other with the end of the normally-closed contact ZJ1.2 of intermediate relay ZJ 1, the other end of the normally opened contact RJ1.1 of described thermal relay RJ1 links to each other with the end of the coil SJ1.1 of time relay sj 1, the other end of the timing closing contact SJ1.2 of described time relay sj 1 links to each other with the end of the coil ZJ1.1 of intermediate relay ZJ 1, and the other end of the normally-closed contact CJ1.4 of described A.C. contactor CJ1 links to each other with the end of indicator light XHD2;
The other end of the normally-closed contact ZJ1.2 of described intermediate relay ZJ 1 links to each other with the end of fuse RT2 successively and after connecing the other end of the other end of coil ZJ1.1 of the other end, intermediate relay ZJ 1 of coil SJ1.1 of the other end, time relay sj 1 of indicator light XHD1 and indicator light XHD2, and the other end of described fuse RT2 links to each other with the control circuit power cathode.
Compared with prior art, the present invention has following beneficial effect: the present invention has added delay protection device, even when heat outage setting value is the specified position of motor, when motor overheating makes the thermal protector action, main circuit can not cut off at once yet, but normal operation; After reaching delay time, the whole protecting device just begins action, cuts off main circuit, and the protection motor is not burnt out; If between time delay, the electric current of motor recovers normal and makes thermal protector reset, and then main circuit can not be cut off, and has guaranteed the normal operation of motor, has avoided generation of false action, and the whole protecting device circuit is simple, and is practical.
Description of drawings
The present invention will be further described in detail below in conjunction with accompanying drawing:
Fig. 1 is main circuit diagram of the present invention;
Fig. 2 is control circuit figure of the present invention.
Embodiment
As depicted in figs. 1 and 2; motor overheating delay protection device of the present invention; comprise: circuit breaker DZ1, A.C. contactor CJ1, thermal relay RJ1, start button QA1, stop button TA1, fuse RT1, RT2, indicator light XHD1, XHD2, intermediate relay ZJ 1 and time relay sj 1, wherein:
The coil of A.C. contactor CJ1 is CJ1.1, and its main contacts is CJ1.2, and normally opened contact is CJ1.3, and normally-closed contact is CJ1.4;
The normally opened contact of thermal relay RJ1 is RJ1.1;
The coil of intermediate relay ZJ 1 is ZJ1.1, and its normally-closed contact is ZJ1.2;
The coil of time relay sj 1 is SJ1.1, and its timing closing contact is SJ1.2;
The main circuit of motor D1 is: link to each other with the power end of motor D1 behind the main contacts CJ1.2 that inlet wire termination A, the B of described circuit breaker DZ1, C three-phase alternating-current supply, the leading-out terminal of described circuit breaker DZ1 are connected in series A.C. contactor CJ1 successively and the thermal relay RJ1;
The control circuit structure of the overheated delay protection of described motor D1 is: link to each other with the control circuit positive source behind the end serial connection fuse RT1 of described stop button TA1, the other end of stop button TA1 successively and connect behind the end of normally opened contact CJ1.3 of the end of start button QA1 and A.C. contactor CJ1 with the end of the normally-closed contact CJ1.4 of A.C. contactor CJ1 and link to each other, the other end of described start button QA1 is successively and connect the other end of the normally opened contact CJ1.3 of A.C. contactor CJ1, the end of indicator light XHD1, link to each other with the end of the coil CJ1.1 of A.C. contactor CJ1 behind the end of the timing closing contact SJ1.2 of the end of the normally opened contact RJ1.1 of thermal relay RJ1 and time relay sj 1;
The other end of the coil CJ1.1 of described A.C. contactor CJ1 links to each other with the end of the normally-closed contact ZJ1.2 of intermediate relay ZJ 1, the other end of the normally opened contact RJ1.1 of described thermal relay RJ1 links to each other with the end of the coil SJ1.1 of time relay sj 1, the other end of the timing closing contact SJ1.2 of described time relay sj 1 links to each other with the end of the coil ZJ1.1 of intermediate relay ZJ 1, and the other end of the normally-closed contact CJ1.4 of described A.C. contactor CJ1 links to each other with the end of indicator light XHD2;
The other end of the normally-closed contact ZJ1.2 of described intermediate relay ZJ 1 links to each other with the end of fuse RT2 successively and after connecing the other end of the other end of coil ZJ1.1 of the other end, intermediate relay ZJ 1 of coil SJ1.1 of the other end, time relay sj 1 of indicator light XHD1 and indicator light XHD2, and the other end of described fuse RT2 links to each other with the control circuit power cathode.
When pressing start button QA1, A.C. contactor CJ1 self-locking energising, coil CJ1.1 gets electric, normally opened contact CJ1.3 adhesive, indicator light XHD1 is bright, and normally-closed contact CJ1.4 disconnects, and indicator light XHD2 goes out, main contacts CJ1.2 adhesive, main circuit energising operation; When pressing stop button TA1, A.C. contactor CJ1 vows electric tripping, coil CJ1.1 dead electricity, and normally opened contact CJ1.3 disconnects, and indicator light XHD1 goes out, normally-closed contact CJ1.4 closure, indicator light XHD2 is bright, and main contacts CJ1.2 disconnects, and the main circuit outage is out of service.
When motor overheating breaks down, the normally opened contact RJ1.1 closure of thermal relay RJ1, the coil SJ1.1 of time relay sj 1 gets, after reaching delay time, timing closing contact SJ1.2 closure, the coil ZJ1.1 of intermediate relay ZJ 1 gets electric, and the normally-closed contact ZJ1.2 of intermediate relay ZJ 1 disconnects, main circuit is cut off, and motor is protected; If between time delay, it is normal that current of electric recovers, and thermal relay RJ1 resets, and main circuit can not be cut off but normally move work, has avoided generation of false action.
Claims (1)
1. motor overheating delay protection device; it is characterized in that: comprising: circuit breaker DZ1, A.C. contactor CJ1, thermal relay RJ1, start button QA1, stop button TA1, fuse RT1, RT2, indicator light XHD1, XHD2, intermediate relay ZJ 1 and time relay sj 1, wherein:
The coil of A.C. contactor CJ1 is CJ1.1, and its main contacts is CJ1.2, and normally opened contact is CJ1.3, and normally-closed contact is CJ1.4;
The normally opened contact of thermal relay RJ1 is RJ1.1;
The coil of intermediate relay ZJ 1 is ZJ1.1, and its normally-closed contact is ZJ1.2;
The coil of time relay sj 1 is SJ1.1, and its timing closing contact is SJ1.2;
The main circuit of motor D1 is: link to each other with the power end of motor D1 behind the main contacts CJ1.2 that the inlet wire termination three-phase alternating-current supply of described circuit breaker DZ1, the leading-out terminal of described circuit breaker DZ1 are connected in series A.C. contactor CJ1 successively and the thermal relay RJ1;
The control circuit structure of the overheated delay protection of described motor D1 is: link to each other with the control circuit positive source behind the end serial connection fuse RT1 of described stop button TA1, the other end of stop button TA1 successively and connect behind the end of normally opened contact CJ1.3 of the end of start button QA1 and A.C. contactor CJ1 with the end of the normally-closed contact CJ1.4 of A.C. contactor CJ1 and link to each other, the other end of described start button QA1 is successively and connect the other end of the normally opened contact CJ1.3 of A.C. contactor CJ1, the end of indicator light XHD1, link to each other with the end of the coil CJ1.1 of A.C. contactor CJ1 behind the end of the timing closing contact SJ1.2 of the end of the normally opened contact RJ1.1 of thermal relay RJ1 and time relay sj 1;
The other end of the coil CJ1.1 of described A.C. contactor CJ1 links to each other with the end of the normally-closed contact ZJ1.2 of intermediate relay ZJ 1, the other end of the normally opened contact RJ1.1 of described thermal relay RJ1 links to each other with the end of the coil SJ1.1 of time relay sj 1, the other end of the timing closing contact SJ1.2 of described time relay sj 1 links to each other with the end of the coil ZJ1.1 of intermediate relay ZJ 1, and the other end of the normally-closed contact CJ1.4 of described A.C. contactor CJ1 links to each other with the end of indicator light XHD2;
The other end of the normally-closed contact ZJ1.2 of described intermediate relay ZJ 1 links to each other with the end of fuse RT2 successively and after connecing the other end of the other end of coil ZJ1.1 of the other end, intermediate relay ZJ 1 of coil SJ1.1 of the other end, time relay sj 1 of indicator light XHD1 and indicator light XHD2, and the other end of described fuse RT2 links to each other with the control circuit power cathode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102671190A CN103326318A (en) | 2013-06-29 | 2013-06-29 | Electric motor overheating delayed protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102671190A CN103326318A (en) | 2013-06-29 | 2013-06-29 | Electric motor overheating delayed protection device |
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| Publication Number | Publication Date |
|---|---|
| CN103326318A true CN103326318A (en) | 2013-09-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013102671190A Pending CN103326318A (en) | 2013-06-29 | 2013-06-29 | Electric motor overheating delayed protection device |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5761018A (en) * | 1996-12-04 | 1998-06-02 | Eaton Corporation | Variable thermal model overload in electrical switching apparatus |
| CN2290952Y (en) * | 1996-05-08 | 1998-09-09 | 刘军 | Voltage reducing starter |
| CN102684158A (en) * | 2012-05-31 | 2012-09-19 | 襄垣县树元电器有限公司 | Overheat delay protection device for motor |
| CN203434594U (en) * | 2013-06-29 | 2014-02-12 | 襄垣县树元电器有限公司 | Motor overheating delay protection device |
-
2013
- 2013-06-29 CN CN2013102671190A patent/CN103326318A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2290952Y (en) * | 1996-05-08 | 1998-09-09 | 刘军 | Voltage reducing starter |
| US5761018A (en) * | 1996-12-04 | 1998-06-02 | Eaton Corporation | Variable thermal model overload in electrical switching apparatus |
| CN102684158A (en) * | 2012-05-31 | 2012-09-19 | 襄垣县树元电器有限公司 | Overheat delay protection device for motor |
| CN203434594U (en) * | 2013-06-29 | 2014-02-12 | 襄垣县树元电器有限公司 | Motor overheating delay protection device |
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Application publication date: 20130925 |