CN102684570A - Multi-way delay start and overheat protection device - Google Patents
Multi-way delay start and overheat protection device Download PDFInfo
- Publication number
- CN102684570A CN102684570A CN2012101738305A CN201210173830A CN102684570A CN 102684570 A CN102684570 A CN 102684570A CN 2012101738305 A CN2012101738305 A CN 2012101738305A CN 201210173830 A CN201210173830 A CN 201210173830A CN 102684570 A CN102684570 A CN 102684570A
- Authority
- CN
- China
- Prior art keywords
- coil
- contactor
- leading
- normally opened
- opened contact
- 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.)
- Pending
Links
Images
Landscapes
- Relay Circuits (AREA)
Abstract
The invention relates to a multi-way delay start and overheat protection device which is capable of achieving delay start of a plurality of motors. The technical scheme is that the wire inlet end of a knife switch DK1 is connected with a three-phase power supply, the wire inlet end of a main contact CJ1-3 of an alternating current contactor CJ1 is in parallel connection with the wire inlet end of a main contact CJ2-3 of an alternating current contactor CJ2 and the wire inlet end of a main contact CJ3-3 of an alternating current contactor CJ3 to be connected with the wire outlet end of the knife switch DK1. The wire outlet end of the main contact CJ1-3 of the alternating current contactor CJ1 is in series connection with a thermal protector RJ1 and then is connected with a power supply port of a motor M1. The wire outlet end of the main contact CJ2-3 of the alternating current contactor CJ2 is in series connection with a thermal protector RJ2 and then connected with a power supply port of a motor M2. The wire outlet end of the main contact CJ3-3 of the alternating current contactor CJ3 is in series connection with a thermal protector RJ3 and then connected with a power supply port of a motor M3. The device is suitable for the technical field of motor protection devices.
Description
Technical field
Multichannel delayed startup of the present invention and overtemperature protection system belong to the electric machines control technology field, are specifically related to a kind of overtemperature protection system of realizing the multiple electric motors delayed startup.
Background technology
A lot of equipment in the commercial Application all comprise multiple electric motors, during device start, for preventing the starting current stack, form hard pulse and damage power supply and working line, and the multiple electric motors of these equipment can not start simultaneously in the practical application.
Utilization at present extensively can realize that the method for multiple electric motors time-delay sequence starting comprises: manually control and PLC control; When adopting the sequence starting of PLC control multiple electric motors, because the program composition more complicated of PLC, maintenance and programming need higher technical support, therefore operating personnel's specialty are had relatively high expectations, and the back maintenance difficulty that breaks down is bigger, and it is too high to control cost.
Summary of the invention
Multichannel delayed startup of the present invention and overtemperature protection system, technical problem to be solved is: a kind of overtemperature protection system of realizing the multiple electric motors delayed startup is provided.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: multichannel delayed startup and overtemperature protection system comprise: push-button switch, A.C. contactor, the time relay, thermal protector, auxiliary relay and indicator light.
The coil CJ1-1 of A.C. contactor CJ1, its normally opened contact CJ1-2, main contacts CJ1-3;
The coil CJ2-1 of A.C. contactor CJ2, its main contacts CJ2-3
The coil CJ3-1 of A.C. contactor CJ3, its main contacts CJ3-3;
The coil SJ1-1 of time relay sj 1, its time-delay normally opened contact SJ1-2;
The coil SJ2-1 of time relay sj 2, its time-delay normally opened contact SJ2-2;
The normally opened contact RJ1-1 of thermal protector RJ1;
The normally opened contact RJ2-1 of thermal protector RJ2;
The normally opened contact RJ3-1 of thermal protector RJ3;
The coil ZJ1-1 of intermediate relay ZJ 1, its normally-closed contact ZJ1-2;
The coil ZJ2-1 of intermediate relay ZJ 2, its normally-closed contact ZJ2-2;
The coil ZJ3-1 of intermediate relay ZJ 3, its normally-closed contact ZJ3-2.
In the motor main circuit; The end of incoming cables of knife switch DK1 links to each other with three phase mains, the end of incoming cables of the main contacts CJ1-3 of A.C. contactor CJ1 and connect the end of incoming cables of main contacts CJ3-3 of end of incoming cables and A.C. contactor CJ3 of main contacts CJ2-3 of A.C. contactor CJ2 after link to each other with the leading-out terminal of knife switch DK1; Link to each other with the power port of motor M 1 behind the leading-out terminal serial connection thermal protector RJ1 of the main contacts CJ1-3 of A.C. contactor CJ1; Link to each other with the power port of motor M 2 behind the leading-out terminal serial connection thermal protector RJ2 of the main contacts CJ2-3 of A.C. contactor CJ2, link to each other with the power port of motor M 3 behind the leading-out terminal serial connection thermal protector RJ3 of the main contacts CJ3-3 of A.C. contactor CJ3.
In the control circuit; Link to each other with the end of incoming cables of fuse BX2 behind the normally-closed contact ZJ2-2 that the end of incoming cables of fuse BX1 links to each other with the power end of control circuit positive pole, the leading-out terminal of fuse BX1 is connected in series the normally-closed contact ZJ1-2 of the coil CJ1-1 of start button AQ2, stop button AT1, A.C. contactor CJ1, intermediate relay ZJ 1, intermediate relay ZJ 2 successively and the normally-closed contact ZJ3-2 of intermediate relay ZJ 3; The leading-out terminal of fuse BX2 links to each other with the power end negative pole of control circuit, and the two ends of said start button AQ2 also are connected to the normally opened contact CJ1-2 of A.C. contactor CJ1.
The coil SJ1-1 of time relay sj 1 is attempted by the two ends of the coil CJ1-1 of A.C. contactor CJ1, and indicator light HD1 is attempted by the two ends of the coil SJ1-1 of time relay sj 1.
The end of incoming cables of the time-delay normally opened contact SJ1-2 of time relay sj 1 links to each other with the end of incoming cables of the coil CJ1-1 of A.C. contactor CJ1; The leading-out terminal of the time-delay normally opened contact SJ1-2 of time relay sj 1 also connects end of incoming cables and the input of indicator light HD2 of coil SJ2-1 of end of incoming cables, the time relay sj 2 of the coil CJ2-1 of A.C. contactor CJ2, and the leading-out terminal of the leading-out terminal of the coil CJ2-1 of said A.C. contactor CJ2, the coil SJ2-1 of time relay sj 2 and the output of indicator light HD2 also connect the back and link to each other with the leading-out terminal of the coil CJ1-1 of A.C. contactor CJ1.
The end of incoming cables of the time-delay normally opened contact SJ2-2 of time relay sj 2 links to each other with the end of incoming cables of the coil CJ1-1 of A.C. contactor CJ1; The leading-out terminal of the time-delay normally opened contact SJ2-2 of time relay sj 2 also connects end of incoming cables and the input of indicator light HD3 of the coil CJ3-1 of A.C. contactor CJ3, and the leading-out terminal of the coil CJ3-1 of said A.C. contactor CJ3 is with the output of indicator light HD3 and connect the back and link to each other with the leading-out terminal of the coil CJ1-1 of A.C. contactor CJ1.
Be attempted by the two ends of the coil CJ1-1 of A.C. contactor CJ1 behind the coil ZJ1-1 of the normally opened contact RJ1-1 serial connection intermediate relay ZJ 1 of thermal protector RJ1; Be attempted by the two ends of the CJ1-1 of ac contactor coil CJ1 behind the coil ZJ2-1 of the normally opened contact RJ2-1 serial connection intermediate relay ZJ 2 of thermal protector RJ2, be attempted by the two ends of the coil CJ1-1 of A.C. contactor CJ1 behind the coil ZJ3-1 of the normally opened contact RJ3-1 serial connection intermediate relay ZJ 3 of thermal protector RJ3.
The beneficial effect that the present invention compared with prior art has is: adopt traditional components and parts such as A.C. contactor, the time relay, thermal protector and auxiliary relay to constitute a complete multichannel delayed startup and an overtemperature protection system; Simple in structure, cost is lower, and reliability is high; Easy to maintenance; Favorable expandability, can be as requested in the practical application expansion control circuit arbitrarily, realize the delayed startup of multiple electric motors; When any motor overload in the main circuit; The overheat protector action of serial connection before the overload motor; The normally-closed contact of the auxiliary relay that is connected in series with overheat protector breaks off, and cuts off the power supply of control circuit, and all motors in the motor main circuit are out of service; Realize overheat protective function, guarantee device line safety.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is done further detailed explanation:
Fig. 1 is the main circuit diagram of motor among the present invention;
Fig. 2 is the control circuit figure of motor among the present invention.
Embodiment
As depicted in figs. 1 and 2, multichannel delayed startup of the present invention and overtemperature protection system comprise: push-button switch, A.C. contactor, the time relay, thermal protector, auxiliary relay and indicator light.
The coil CJ1-1 of A.C. contactor CJ1, its normally opened contact CJ1-2, main contacts CJ1-3;
The coil CJ2-1 of A.C. contactor CJ2, its main contacts CJ2-3
The coil CJ3-1 of A.C. contactor CJ3, its main contacts CJ3-3;
The coil SJ1-1 of time relay sj 1, its time-delay normally opened contact SJ1-2;
The coil SJ2-1 of time relay sj 2, its time-delay normally opened contact SJ2-2;
The normally opened contact RJ1-1 of thermal protector RJ1;
The normally opened contact RJ2-1 of thermal protector RJ2;
The normally opened contact RJ3-1 of thermal protector RJ3;
The coil ZJ1-1 of intermediate relay ZJ 1, its normally-closed contact ZJ1-2;
The coil ZJ2-1 of intermediate relay ZJ 2, its normally-closed contact ZJ2-2;
The coil ZJ3-1 of intermediate relay ZJ 3, its normally-closed contact ZJ3-2.
In the motor main circuit; The end of incoming cables of knife switch DK1 links to each other with A, B, C three-phase alternating-current supply, the end of incoming cables of the main contacts CJ1-3 of A.C. contactor CJ1 and connect the end of incoming cables of main contacts CJ3-3 of end of incoming cables and A.C. contactor CJ3 of main contacts CJ2-3 of A.C. contactor CJ2 after link to each other with the leading-out terminal of knife switch DK1; Link to each other with the power port of motor M 1 behind the leading-out terminal serial connection thermal protector RJ1 of the main contacts CJ1-3 of A.C. contactor CJ1; Link to each other with the power port of motor M 2 behind the leading-out terminal serial connection thermal protector RJ2 of the main contacts CJ2-3 of A.C. contactor CJ2, link to each other with the power port of motor M 3 behind the leading-out terminal serial connection thermal protector RJ3 of the main contacts CJ3-3 of A.C. contactor CJ3; Knife switch DK1 when the motor main circuit breaks down, manually breaks off knife switch DK1 as the master switch of motor main circuit, cuts off the power supply input of motor main circuit, but the safety inspection working line.
In the control circuit; Link to each other with the end of incoming cables of fuse BX2 behind the normally-closed contact ZJ2-2 that the end of incoming cables of fuse BX1 links to each other with the power end of control circuit positive pole, the leading-out terminal of fuse BX1 is connected in series the normally-closed contact ZJ1-2 of the coil CJ1-1 of start button AQ2, stop button AT1, A.C. contactor CJ1, intermediate relay ZJ 1, intermediate relay ZJ 2 successively and the normally-closed contact ZJ3-2 of intermediate relay ZJ 3; The leading-out terminal of fuse BX2 links to each other with the power end negative pole of control circuit, and the two ends of said start button AQ2 also are connected to the normally opened contact CJ1-2 of A.C. contactor CJ1; The power end of above-mentioned control circuit can with the three-phase AC line of knife switch DK1 leading-out terminal in any two link to each other.
The coil SJ1-1 of time relay sj 1 is attempted by the two ends of the coil CJ1-1 of A.C. contactor CJ1, and indicator light HD1 is attempted by the two ends of the coil SJ1-1 of time relay sj 1.
The end of incoming cables of the time-delay normally opened contact SJ1-2 of time relay sj 1 links to each other with the end of incoming cables of the coil CJ1-1 of A.C. contactor CJ1; The leading-out terminal of the time-delay normally opened contact SJ1-2 of time relay sj 1 also connects end of incoming cables and the input of indicator light HD2 of coil SJ2-1 of end of incoming cables, the time relay sj 2 of the coil CJ2-1 of A.C. contactor CJ2, and the leading-out terminal of the leading-out terminal of the coil CJ2-1 of said A.C. contactor CJ2, the coil SJ2-1 of time relay sj 2 and the output of indicator light HD2 also connect the back and link to each other with the leading-out terminal of the coil CJ1-1 of A.C. contactor CJ1.
The end of incoming cables of the time-delay normally opened contact SJ2-2 of time relay sj 2 links to each other with the end of incoming cables of the coil CJ1-1 of A.C. contactor CJ1; The leading-out terminal of the time-delay normally opened contact SJ2-2 of time relay sj 2 also connects end of incoming cables and the input of indicator light HD3 of the coil CJ3-1 of A.C. contactor CJ3, and the leading-out terminal of the coil CJ3-1 of said A.C. contactor CJ3 is with the output of indicator light HD3 and connect the back and link to each other with the leading-out terminal of the coil CJ1-1 of A.C. contactor CJ1.
Be attempted by the two ends of the coil CJ1-1 of A.C. contactor CJ1 behind the coil ZJ1-1 of the normally opened contact RJ1-1 serial connection intermediate relay ZJ 1 of thermal protector RJ1; Be attempted by the two ends of the CJ1-1 of ac contactor coil CJ1 behind the coil ZJ2-1 of the normally opened contact RJ2-1 serial connection intermediate relay ZJ 2 of thermal protector RJ2, be attempted by the two ends of the coil CJ1-1 of A.C. contactor CJ1 behind the coil ZJ3-1 of the normally opened contact RJ3-1 serial connection intermediate relay ZJ 3 of thermal protector RJ3.
Among the present invention, closed knife switch DK1, conducting motor main circuit; Press start button AQ2; Turn-on control circuit, the main contacts CJ1-3 adhesive of A.C. contactor CJ1, motor M 1 starts operation; The indicator light HD1 of indication motor M1 running status is bright, the timing of the coil SJ1-1 of time relay sj 1 energising simultaneously; The timing time of relay SJ1 arrives when the time; The time-delay normally opened contact SJ1-2 of time relay sj 1 is closed; The main contacts CJ2-3 adhesive of A.C. contactor CJ2; Motor M 2 starts operation, and the indicator light HD2 of indication motor M2 running status is bright, the timing of the coil SJ2-1 of time relay sj 2 energising simultaneously; The timing time of relay SJ2 arrives when the time, and the time-delay normally opened contact SJ2-2 of time relay sj 2 is closed, the main contacts CJ3-3 adhesive of A.C. contactor CJ3, and motor M 3 starts operation, and the indicator light HD3 of indication motor M3 running status is bright; Motor M 1, M2, M3 realize the time-delay sequence starting.
When needs stop entire circuit, press stop button AT1, cut off the power supply of control circuit, all motors in the motor main circuit are out of service, protection equipment Electrical Safety.
During M1 motor overload in the motor main circuit; The thermal protector RJ1 action that is connected in series in the circuit before the M1 motor, its normally opened contact RJ1-1 is closed, is serially connected in the intermediate relay ZJ 1 energising back action behind the thermal protector RJ1 in the control circuit; Its normally-closed contact ZJ1-2 breaks off; Cut off the power supply of control circuit, all motors in the motor main circuit are out of service, protection equipment Electrical Safety.
During M2 motor overload in the motor main circuit; The thermal protector RJ2 action that is connected in series in the circuit before the M2 motor, its normally opened contact RJ2-1 is closed, is serially connected in the intermediate relay ZJ 2 energising back actions behind the thermal protector RJ2 in the control circuit; Its normally-closed contact ZJ2-2 breaks off; Cut off the power supply of control circuit, all motors in the motor main circuit are out of service, protection equipment Electrical Safety.
During M3 motor overload in the motor main circuit; The thermal protector RJ3 action that is connected in series in the circuit before the M3 motor, its normally opened contact RJ3-1 is closed, is serially connected in the intermediate relay ZJ 3 energising back actions behind the thermal protector RJ3 in the control circuit; Its normally-closed contact ZJ3-2 breaks off; Cut off the power supply of control circuit, all motors in the motor main circuit are out of service, protection equipment Electrical Safety.
Above-mentioned embodiment realizes that preferably the circuit of No. three motor delayed startups and overtemperature protection is as embodiment; And the course of work of circuit described in detail; Those skilled in the art's expanded circuit as required in the practical application is realized the delayed startup and the overtemperature protection of multiple electric motors; According to the delay time that the time relay is set, the multiple electric motors time-delay sequence starting in the realization equipment; Any motor overload in main circuit; The action of the thermal protector that is connected in series in the circuit of this overload motor is serially connected in the auxiliary relay action behind the thermal protector in the control circuit, cut off the power supply of control circuit; All motors in the motor main circuit are out of service, guarantee the equipment Electrical Safety.
Claims (1)
1. multichannel delayed startup and overtemperature protection system comprise: push-button switch, A.C. contactor, the time relay, thermal protector, auxiliary relay and indicator light;
The coil CJ1-1 of A.C. contactor CJ1, its normally opened contact CJ1-2, main contacts CJ1-3;
The coil CJ2-1 of A.C. contactor CJ2, its main contacts CJ2-3
The coil CJ3-1 of A.C. contactor CJ3, its main contacts CJ3-3;
The coil SJ1-1 of time relay sj 1, its time-delay normally opened contact SJ1-2;
The coil SJ2-1 of time relay sj 2, its time-delay normally opened contact SJ2-2;
The normally opened contact RJ1-1 of thermal protector RJ1;
The normally opened contact RJ2-1 of thermal protector RJ2;
The normally opened contact RJ3-1 of thermal protector RJ3;
The coil ZJ1-1 of intermediate relay ZJ 1, its normally-closed contact ZJ1-2;
The coil ZJ2-1 of intermediate relay ZJ 2, its normally-closed contact ZJ2-2;
The coil ZJ3-1 of intermediate relay ZJ 3, its normally-closed contact ZJ3-2;
It is characterized in that: in the motor main circuit; The end of incoming cables of knife switch DK1 links to each other with three phase mains, the end of incoming cables of the main contacts CJ1-3 of A.C. contactor CJ1 and connect the end of incoming cables of main contacts CJ3-3 of end of incoming cables and A.C. contactor CJ3 of main contacts CJ2-3 of A.C. contactor CJ2 after link to each other with the leading-out terminal of knife switch DK1; Link to each other with the power port of motor M 1 behind the leading-out terminal serial connection thermal protector RJ1 of the main contacts CJ1-3 of A.C. contactor CJ1; Link to each other with the power port of motor M 2 behind the leading-out terminal serial connection thermal protector RJ2 of the main contacts CJ2-3 of A.C. contactor CJ2, link to each other with the power port of motor M 3 behind the leading-out terminal serial connection thermal protector RJ3 of the main contacts CJ3-3 of A.C. contactor CJ3;
In the control circuit; Link to each other with the end of incoming cables of fuse BX2 behind the normally-closed contact ZJ2-2 that the end of incoming cables of fuse BX1 links to each other with the power end of control circuit positive pole, the leading-out terminal of fuse BX1 is connected in series the normally-closed contact ZJ1-2 of the coil CJ1-1 of start button AQ2, stop button AT1, A.C. contactor CJ1, intermediate relay ZJ 1, intermediate relay ZJ 2 successively and the normally-closed contact ZJ3-2 of intermediate relay ZJ 3; The leading-out terminal of fuse BX2 links to each other with the power end negative pole of control circuit, and the two ends of said start button AQ2 also are connected to the normally opened contact CJ1-2 of A.C. contactor CJ1;
The coil SJ1-1 of time relay sj 1 is attempted by the two ends of the coil CJ1-1 of A.C. contactor CJ1, and indicator light HD1 is attempted by the two ends of the coil SJ1-1 of time relay sj 1;
The end of incoming cables of the time-delay normally opened contact SJ1-2 of time relay sj 1 links to each other with the end of incoming cables of the coil CJ1-1 of A.C. contactor CJ1; The leading-out terminal of the time-delay normally opened contact SJ1-2 of time relay sj 1 also connects end of incoming cables and the input of indicator light HD2 of coil SJ2-1 of end of incoming cables, the time relay sj 2 of the coil CJ2-1 of A.C. contactor CJ2, and the leading-out terminal of the leading-out terminal of the coil CJ2-1 of said A.C. contactor CJ2, the coil SJ2-1 of time relay sj 2 and the output of indicator light HD2 also connect the back and link to each other with the leading-out terminal of the coil CJ1-1 of A.C. contactor CJ1;
The end of incoming cables of the time-delay normally opened contact SJ2-2 of time relay sj 2 links to each other with the end of incoming cables of the coil CJ1-1 of A.C. contactor CJ1; The leading-out terminal of the time-delay normally opened contact SJ2-2 of time relay sj 2 also connects end of incoming cables and the input of indicator light HD3 of the coil CJ3-1 of A.C. contactor CJ3, and the leading-out terminal of the coil CJ3-1 of said A.C. contactor CJ3 is with the output of indicator light HD3 and connect the back and link to each other with the leading-out terminal of the coil CJ1-1 of A.C. contactor CJ1;
Be attempted by the two ends of the coil CJ1-1 of A.C. contactor CJ1 behind the coil ZJ1-1 of the normally opened contact RJ1-1 serial connection intermediate relay ZJ 1 of thermal protector RJ1; Be attempted by the two ends of the CJ1-1 of ac contactor coil CJ1 behind the coil ZJ2-1 of the normally opened contact RJ2-1 serial connection intermediate relay ZJ 2 of thermal protector RJ2, be attempted by the two ends of the coil CJ1-1 of A.C. contactor CJ1 behind the coil ZJ3-1 of the normally opened contact RJ3-1 serial connection intermediate relay ZJ 3 of thermal protector RJ3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101738305A CN102684570A (en) | 2012-05-31 | 2012-05-31 | Multi-way delay start and overheat protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101738305A CN102684570A (en) | 2012-05-31 | 2012-05-31 | Multi-way delay start and overheat protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102684570A true CN102684570A (en) | 2012-09-19 |
Family
ID=46816055
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012101738305A Pending CN102684570A (en) | 2012-05-31 | 2012-05-31 | Multi-way delay start and overheat protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102684570A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105047494A (en) * | 2015-08-14 | 2015-11-11 | 国家电网公司 | Automatic closing apparatus of low-voltage universal circuit breaker |
| CN112392743A (en) * | 2020-10-13 | 2021-02-23 | 广西电网有限责任公司梧州供电局 | Oil-submersible pump control device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2281613Y (en) * | 1997-02-21 | 1998-05-13 | 上海南方水设备有限公司 | Time sharing switch for weak igniting plural A. C. motors |
| CN201733267U (en) * | 2010-06-29 | 2011-02-02 | 河南省电力公司许昌供电公司 | Power reset self-starting device for asynchronous motor |
| CN202586838U (en) * | 2012-05-31 | 2012-12-05 | 襄垣县树元电器有限公司 | Multipath time-delay starting and overheating protection device |
-
2012
- 2012-05-31 CN CN2012101738305A patent/CN102684570A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2281613Y (en) * | 1997-02-21 | 1998-05-13 | 上海南方水设备有限公司 | Time sharing switch for weak igniting plural A. C. motors |
| CN201733267U (en) * | 2010-06-29 | 2011-02-02 | 河南省电力公司许昌供电公司 | Power reset self-starting device for asynchronous motor |
| CN202586838U (en) * | 2012-05-31 | 2012-12-05 | 襄垣县树元电器有限公司 | Multipath time-delay starting and overheating protection device |
Non-Patent Citations (1)
| Title |
|---|
| 洪卫东: "基于时间继电器的多台电机延时启停自控设计", 《装备制造技术》, no. 3, 31 March 2011 (2011-03-31) * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105047494A (en) * | 2015-08-14 | 2015-11-11 | 国家电网公司 | Automatic closing apparatus of low-voltage universal circuit breaker |
| CN112392743A (en) * | 2020-10-13 | 2021-02-23 | 广西电网有限责任公司梧州供电局 | Oil-submersible pump control device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2018033296A (en) | Safety device for solar power generation facility | |
| CN202586838U (en) | Multipath time-delay starting and overheating protection device | |
| CN102684158A (en) | Overheat delay protection device for motor | |
| CN103311889A (en) | Manual switching protection circuit for dual power supplies | |
| CN102684570A (en) | Multi-way delay start and overheat protection device | |
| CN203014354U (en) | Circuit for controlling auxiliary device of large units | |
| CN201898321U (en) | Cooling control circuit of variable frequency motor | |
| CN203434597U (en) | Motor overheating delay protection self-lock device | |
| CN202586839U (en) | Multi-path time-delay starting control device | |
| CN208257694U (en) | A kind of electric motor starting control device | |
| CN203553882U (en) | Transformer low-voltage tripping automatic reclosing device | |
| CN102684571A (en) | Multipath delay start control device | |
| CN202586284U (en) | Motor overheating delay protection device | |
| CN203434594U (en) | Motor overheating delay protection device | |
| CN202634334U (en) | Star-delta delayed transformation controller | |
| CN201717670U (en) | Dual-power-supply switching device with overvoltage protection | |
| CN204706867U (en) | A kind of protection system of mine-used frequency-converter | |
| CN203434595U (en) | Dual power supply manual switch protection circuit | |
| CN203434599U (en) | Three-phase power supply open-phase protective device | |
| CN208337443U (en) | A kind of motor frequency conversion starting or stopping control circuit | |
| CN105071439A (en) | Photovoltaic inversion single-phase AC grid-connected box | |
| CN201797299U (en) | Reverse-power relay | |
| CN201181840Y (en) | Phase-loss protector for three-phase electrical motor | |
| CN204680911U (en) | DC traction switchgear hospital bus bar system | |
| CN104967088B (en) | The protection system of mine-used frequency-converter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120919 |