CN102157918A - Phase failure and overheating comprehensive protector for motor - Google Patents
Phase failure and overheating comprehensive protector for motor Download PDFInfo
- Publication number
- CN102157918A CN102157918A CN2011101036454A CN201110103645A CN102157918A CN 102157918 A CN102157918 A CN 102157918A CN 2011101036454 A CN2011101036454 A CN 2011101036454A CN 201110103645 A CN201110103645 A CN 201110103645A CN 102157918 A CN102157918 A CN 102157918A
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- Prior art keywords
- relay
- motor
- fuse
- phase
- temperature sensing
- 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.)
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- 238000013021 overheating Methods 0.000 title abstract description 7
- 230000001012 protector Effects 0.000 title abstract description 5
- 239000000523 sample Substances 0.000 claims abstract description 7
- 230000001681 protective effect Effects 0.000 abstract description 3
- 238000009434 installation Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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- Protection Of Generators And Motors (AREA)
Abstract
The invention discloses a phase failure and overheating comprehensive protector for a motor. A first fuse, a start button QA, a contactor JC, a stop button, a protective contact RJ of a thermal relay and a second fuse are sequentially connected in series between a phase line A and a phase line C. One end of a relay KA is connected in series with a third fuse, and then is connected with a phase line B. The other end of the relay KA is connected with a zero wire or the phase line A or the phase line C. A normally open contact KA1 of the relay KA is connected in series between the normally open contact RJ of the thermal relay and the second fuse. A probe of a temperature sensing relay KC is fixedly arranged on the motor. An action contact of the temperature sensing relay KC is connected in series between one end of the relay KA and the third fuse. The temperature sensing relay KC is connected in parallel with the relay KA. The phase failure and overheating comprehensive protector has comprehensive phase failure and overtemperature protection functions, makes the motor run at control temperature and prolongs the service life of the motor.
Description
Technical field
The present invention relates to the electric motor electron protective device, particularly motor phase failure overtemperature protection equipment.
Background technology
Usually the employing contactor is realized the open phase protection to motor.Motor is in using the contactor protection; generally only use A, C as the actuation coil power supply; as A, when the phase failure appears in C; the contactor actuation coil loses voltage can correctly disconnect working power; during as phase in the generator (B phase) phase shortage; or other reason (overweight etc. as stall, load g-load) causes motor overheating to cause contactor not disconnect fast, causes faults such as generator coil damage easily.
Summary of the invention
The purpose of this invention is to provide a kind of overheated comprehensive protection device of the motor phase failure with comprehensive phase failure protection function.
The object of the present invention is achieved like this: the overheated comprehensive protection device of a kind of motor phase failure, comprise, be in series with first fuse successively between A phase line and the C phase line, start button QA, contactor JC, stop button TA, the protection contact R J of thermal relay and second fuse, it is characterized in that also having relay K A; Relay K A one end is connected to the B phase line after being connected in series the 3rd fuse, and the relay K A other end is connected to zero line or A phase line or C phase line; The normally opened contact KA1 of relay K A is connected between the normally opened contact RJ and described second fuse of thermal relay.
Also has temperature sensing relay K C; The probe of temperature sensing relay K C is fixed on the motor, and the action contact of temperature sensing relay K C is serially connected between relay K A one end and the 3rd fuse, and temperature sensing relay K C is in parallel with relay K A.
Operation principle of the present invention is as follows: increase a relay K A on existing contactor protection basis; the 380V that inserts motor B phase and zero line (perhaps uses the 220V operating voltage as operation voltage; but relay is to want caution area component voltage grade in the choice); A mutually or the operation voltage line of C phase be connected in series normally opened contact KA1 into the KA relay; as A, B, C when no matter that loses voltage mutually; contactor all will move, and disconnects the motor working power, and the open-phase protection loop completes.
If owing to other reason (as stall; the load g-load is overweight etc.) cause motor overheating; cause fault generations such as generator coil insulating damage; increase by a sleeving temperature sensing relay K C device again; the probe of temperature sensing relay is fixed on the motor; can induce motor temperature is changed to suitable; can set engine fuselage control temperature as the case may be; the temperature that induces motor when this device is higher than when setting maximum temperature; temperature controller action contact KC2 automatic disconnection; make the KA KA1 contact, voltage auto power off loop of losing the job; contactor JC returns initial condition, and excision motor working power has been protected motor.
Compared with prior art, advantageous effects of the present invention is:
1, from structure, be on existing contactor phase failure control device basis, to increase a relay, can solve in A, B, the C phase line arbitrary when losing voltage mutually, but automatic disconnection motor working powers all realizes the purpose of real open-phase protection.When A, B, C three phase mains when no matter that phase power supply has open-phase fault, can the automatic disconnection contactor, the protection motor.
2, as other reason (overweight etc.) temperature sensing actuating of relay when reaching design temperature when causing motor overheating as stall, load g-load, can automatic disconnection contactor 2KA and cut off contactor KA action power and protected motor.
3, the temperature sensing relay can rationally be set protection operating temperature point according to the operational environment of motor and the contact position of temperature sensor probe, and the protection temperature has adjustability, can protect motor better.
4, the installation wiring is simple, and it is more reasonable to protect.
5, can be the phase failure of manufacturer production novel motor, overheated comprehensive protection device provides design considerations.
6, realize the phase shortage power-off protection automatically, and realize the overtemperature power-off protection automatically.When temperature surpasses motor fuselage control temperature, automatic disconnection motor working power, thus the protection motor turns round under the control temperature, has prolonged the motor life-span.
Description of drawings
Fig. 1 is a circuit diagram of the present invention.
Embodiment
Fig. 1 illustrates, the present invention includes between A phase line and the C phase line and be in series with first fuse successively, start button QA, the normally opened contact JC4 of contactor JC(JC is in parallel with QA), stop button TA, the protection contact R J of thermal relay and second fuse, relay K A one end is connected to the B phase line after being connected in series the 3rd fuse, and the relay K A other end is connected to zero line or A phase line or C phase line; The normally opened contact KA1 of relay K A be connected between the normally opened contact RJ and described second fuse of thermal relay (among Fig. 1, the first fuse 1RD, the second fuse 2RD, the 3rd fuse 3RD, 3 action contact JC1-3 of JC.Among Fig. 1, three semicircle thermal relays of representing that motor M connects; KC2 is the action contact of temperature sensing relay K C.The probe of temperature sensing relay is represented by the arrow of its below among Fig. 1).
The other end connecting to neutral line of temperature sensing relay (corresponding 220V alternating current) or A decide at the type selecting of temperature sensing relay respectively (is 220V or 380V as the temperature sensing relay working voltage) mutually or B phase (corresponding 380V alternating current).
This protector principle is simple, increases a relay K A and complete on the basis of temperature sensing relay, the temperature sensing relay with relay K A is integrated is installed in the device, is convenient to wiring and installs.Protector can be suitable for the threephase motor of different size; can protection when motor generation phase shortage or because of other reason (as stall, the g-load of loading overweight etc.) when causing motor overheating; from kinetic energy automatic disconnection contactor JC, excise the motor working power and protection equipment.The temperature sensing relay can rationally be set protection operating temperature point according to the operational environment of motor and the contact position of temperature sensor probe.The protection temperature has adjustability, can according to environmental condition the motor protection temperature be set better, is fit to the protective device of motor under the varying environment.The installation wiring is simple, and it is more reasonable to protect.Such product promotion had bigger market prospects.So series products puts goods on the market and believes and can increasing user use.
Claims (2)
1. the overheated comprehensive protection device of the motor phase failure comprises, is in series with first fuse successively between A phase line and the C phase line, start button QA, contactor JC, stop button TA, the protection contact R J of thermal relay and second fuse is characterized in that, also have relay K A; Relay K A one end is connected to the B phase line after being connected in series the 3rd fuse, and the relay K A other end is connected to zero line or A phase line or C phase line; The normally opened contact KA1 of relay K A is connected between the normally opened contact RJ and described second fuse of thermal relay.
2. the overheated comprehensive protection device of the motor phase failure according to claim 1 is characterized in that, also has temperature sensing relay K C; The probe of temperature sensing relay K C is fixed on the motor, and the action contact of temperature sensing relay K C is serially connected between relay K A one end and the 3rd fuse, and temperature sensing relay K C is in parallel with relay K A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101036454A CN102157918A (en) | 2011-04-25 | 2011-04-25 | Phase failure and overheating comprehensive protector for motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101036454A CN102157918A (en) | 2011-04-25 | 2011-04-25 | Phase failure and overheating comprehensive protector for motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102157918A true CN102157918A (en) | 2011-08-17 |
Family
ID=44439172
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101036454A Pending CN102157918A (en) | 2011-04-25 | 2011-04-25 | Phase failure and overheating comprehensive protector for motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102157918A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1302370A1 (en) * | 1985-01-18 | 1987-04-07 | Грузинский Научно-Исследовательский Институт Механизации И Электрификации Сельского Хозяйства Им.К.М.Амираджиби | Device for protection of three-phase electric motor against overload and two-phase operation |
| CN87205805U (en) * | 1987-03-30 | 1988-02-03 | 蒲经城 | Ac contactor with open-phase protection |
| CN87204045U (en) * | 1987-03-21 | 1988-04-06 | 赵黎明 | Protective unit of motor for loss of phase and overtemperature |
| CN2133078Y (en) * | 1992-09-04 | 1993-05-12 | 杨久生 | Protector of motor |
| CN2306603Y (en) * | 1997-07-23 | 1999-02-03 | 路术春 | Phase interruption protector for AC motor |
| CN201315475Y (en) * | 2008-12-17 | 2009-09-23 | 周治贵 | Thermorelay circuit with phase failure protection used for alternating current motor |
| CN201994639U (en) * | 2011-04-25 | 2011-09-28 | 四川省电力公司达州电业局 | Phase loss and overheating integrated protector for motor |
-
2011
- 2011-04-25 CN CN2011101036454A patent/CN102157918A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1302370A1 (en) * | 1985-01-18 | 1987-04-07 | Грузинский Научно-Исследовательский Институт Механизации И Электрификации Сельского Хозяйства Им.К.М.Амираджиби | Device for protection of three-phase electric motor against overload and two-phase operation |
| CN87204045U (en) * | 1987-03-21 | 1988-04-06 | 赵黎明 | Protective unit of motor for loss of phase and overtemperature |
| CN87205805U (en) * | 1987-03-30 | 1988-02-03 | 蒲经城 | Ac contactor with open-phase protection |
| CN2133078Y (en) * | 1992-09-04 | 1993-05-12 | 杨久生 | Protector of motor |
| CN2306603Y (en) * | 1997-07-23 | 1999-02-03 | 路术春 | Phase interruption protector for AC motor |
| CN201315475Y (en) * | 2008-12-17 | 2009-09-23 | 周治贵 | Thermorelay circuit with phase failure protection used for alternating current motor |
| CN201994639U (en) * | 2011-04-25 | 2011-09-28 | 四川省电力公司达州电业局 | Phase loss and overheating integrated protector for motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: STATE GRID CORPORATION OF CHINA Effective date: 20121226 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20121226 Address after: 635000 No. 816 Chaoyang East Road, Sichuan, Dazhou Applicant after: Sichuan Electric Power Co.,Ltd. Dazhou Electric Power Bureau Applicant after: State Grid Corporation of China Address before: 635000 No. 816 Chaoyang East Road, Sichuan, Dazhou Applicant before: Sichuan Electric Power Co.,Ltd. Dazhou Electric Power Bureau |
|
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110817 |
|
| WD01 | Invention patent application deemed withdrawn after publication |