CN202957581U - Default phase protection device for motor - Google Patents
Default phase protection device for motor Download PDFInfo
- Publication number
- CN202957581U CN202957581U CN 201220691372 CN201220691372U CN202957581U CN 202957581 U CN202957581 U CN 202957581U CN 201220691372 CN201220691372 CN 201220691372 CN 201220691372 U CN201220691372 U CN 201220691372U CN 202957581 U CN202957581 U CN 202957581U
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- Prior art keywords
- fuse
- switch
- contactor
- phase
- button
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Abstract
The utility model discloses a default phase protection device for a motor. The device comprises a master power switch, three phases of fuses FU1 to FU3, switches of alternating current contactors, a thermal relay, a fuse FU5, a first starting button, a second starting button, an electromagnetic button, a coil of the electromagnetic button and a first indicator lamp, wherein the master power switch, the fuses FU1 to FU3, the switches of the alternating current contactors and the thermal relay are sequentially connected between a three-phase alternating current power supply and a three-phase motor; the fuse FU5, the first starting button, the second starting button, the electromagnetic button and the coil are sequentially connected between the fuse FU3, the common end of the switch of the corresponding alternating current contactor and the ground; the first indicator lamp is connected in parallel with the two ends of the coil of the electromagnetic button; a fuse FU4, a starting switch and coils of the alternating current contactors are sequentially connected between the fuse FU2 and the common end of the switch of the corresponding alternating current contactor and between the fuse FU1 and the common end of the switch of the corresponding alternating current contactor; and a first indicator lamp is connected in parallel with the two ends of a coil of an alternating current contactor. The default phase protection device for the motor has the advantages of high safety, low noise and low failure rate.
Description
Technical field
The utility model relates to the motor phase failure protection technical field, particularly, relates to a kind of loss-of-phase protection arrangement.
Background technology
Threephase asynchronous is very surprising because of the quantity that the power supply open-phase running burns, and its most cases is because low-voltage circuit breaker or isolating switch loose contact: A.C. contactor burns, and can not reliably contact connection; The fuse operating period is long and fuse oxide etch is subject to that cranking current pulse blows etc.
During general phase-defect of motor operation, there will be: vibration increases, and abnormal noise is arranged, and temperature raises, and rotating speed descends, and electric current increases, during vacant phase starting, have strong " drone " sound, can't start.In order to protect motor, according to the fault point that may occur of these phase shortages, need to add open-phase protection is set to the threephase motor circuit.
In realizing process of the present utility model, the defect such as the inventor finds in prior art at least to have poor stability, noise is large and failure rate is high.
Summary of the invention
The purpose of this utility model is, for the problems referred to above, proposes a kind of loss-of-phase protection arrangement, to realize that fail safe is good, noise is little and the advantage of failure rate is low.
For achieving the above object, the technical solution adopted in the utility model is: a kind of loss-of-phase protection arrangement comprises battery main switch DK, the three-phase fuse FU1 to FU3 be connected in turn between three-phase alternating-current supply and three phase electric machine M, switch and the thermal relay FR of A.C. contactor KM; And,
Be connected to the coil of fuse FU5, the first start button SJ1, the second start button SJ2, Electromagnetic push-button KQ and Electromagnetic push-button KQ between the common port of switch of fuse FU3 and corresponding A.C. contactor KM and ground in turn, be connected in parallel on the first indicator light L1 at solenoid KQ two ends; And,
At the common port of the switch of fuse FU2 and corresponding A.C. contactor KM, with fuse FU1 with accordingly between the common port of the switch of A.C. contactor KM, be connected with the coil of fuse FU4, starting switch and A.C. contactor KM in turn, be connected in parallel on the first indicator light L2 at the coil two ends of A.C. contactor KM.
Further, described battery main switch DK comprises automatic air-break switch.
Further, described fuse FU1 or fuse FU2 or fuse FU3 or fuse FU4 or fuse FU5, comprise the fuse that fuse that fuse that model is NT00-10 or model are RT16-00 or model are RT36-00.
The loss-of-phase protection arrangement of each embodiment of the utility model, owing to comprising battery main switch DK, the three-phase fuse FU1 to FU3 be connected in turn between three-phase alternating-current supply and three phase electric machine M, switch and the thermal relay FR of A.C. contactor KM; Be connected to the coil of fuse FU5, the first start button SJ1, the second start button SJ2, Electromagnetic push-button KQ and Electromagnetic push-button KQ between the common port of switch of fuse FU3 and corresponding A.C. contactor KM and ground in turn, be connected in parallel on the first indicator light L1 at solenoid KQ two ends; At the common port of the switch of fuse FU2 and corresponding A.C. contactor KM, with fuse FU1 with accordingly between the common port of the switch of A.C. contactor KM, be connected with the coil of fuse FU4, starting switch and A.C. contactor KM in turn, be connected in parallel on the first indicator light L2 at the coil two ends of A.C. contactor KM; Can be more easy to the detection of institute's phase shortage, improve overhaul of the equipments speed, stable motor is played a very good protection; Thereby can overcome poor stability in prior art, noise is large and failure rate is high defect, to realize that fail safe is good, noise is little and the advantage of failure rate is low.
Other features and advantages of the utility model will be set forth in the following description, and, partly from specification, become apparent, or understand by implementing the utility model.
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
The accompanying drawing explanation
Accompanying drawing is used to provide further understanding of the present utility model, and forms the part of specification, with embodiment mono-of the present utility model, is used from explanation the utility model, does not form restriction of the present utility model.In the accompanying drawings:
The operation principle schematic diagram that Fig. 1 is the utility model loss-of-phase protection arrangement.
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment of the present utility model is described, should be appreciated that preferred embodiment described herein is only for description and interpretation the utility model, and be not used in restriction the utility model.
According to the utility model embodiment, provide a kind of loss-of-phase protection arrangement.As shown in Figure 1, the present embodiment comprises battery main switch DK, the three-phase fuse FU1 to FU3 be connected in turn between three-phase alternating-current supply and three phase electric machine M, switch and the thermal relay FR of A.C. contactor KM; Be connected to the coil of fuse FU5, the first start button SJ1, the second start button SJ2, Electromagnetic push-button KQ and Electromagnetic push-button KQ between the common port of switch of fuse FU3 and corresponding A.C. contactor KM and ground in turn, be connected in parallel on the first indicator light L1 at solenoid KQ two ends; At the common port of the switch of fuse FU2 and corresponding A.C. contactor KM, with fuse FU1 with accordingly between the common port of the switch of A.C. contactor KM, be connected with the coil of fuse FU4, starting switch and A.C. contactor KM in turn, be connected in parallel on the first indicator light L2 at the coil two ends of A.C. contactor KM.
Large and there is no star--the equipment of triangle conversion starting drive for some starting loads, the blowout current of fuse-link must select more greatly, if but select too muchly, can not shield again; Select too smallly, likely blow when electric motor starting again, cause phase shortage and burn motor, loss-of-phase protection arrangement is by head it off.Above-mentioned fuse FU1 or fuse FU2 or fuse FU3 or fuse FU4 or fuse FU5, can comprise the fuse that fuse that fuse that model is NT00-10 or model are RT16-00 or model are RT36-00.
In Fig. 1, DK is battery main switch, can adopt automatic air-break switch; KM is A.C. contactor, and FR is thermal relay.During work, press start button SJ2, KQ is with regard to adhesive self-insurance, and KM obtains electric adhesive, electric motor normal working.If C phase fuse-link fusing, KQ discharges immediately, KM disengagements of cut off the power supply, and motor quits work, and plays a protective role, and now L1, L2 two indicator lights all extinguish, and indication C nothing mutually is electric.While fusing as the fuse-link when B phase or A phase, though KQ still adhesive do not put, KM can discharge equally and protect motor.Now only L2 extinguishes and L1 is still bright, as long as check that the fuse-link of B phase or A phase is just passable.
The loss-of-phase protection arrangement of above-described embodiment, simple in structure, more easy to the detection of institute's phase shortage, improve overhaul of the equipments speed, stable motor is played a very good protection.
Finally it should be noted that: the foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, although with reference to previous embodiment, the utility model is had been described in detail, for a person skilled in the art, its technical scheme that still can put down in writing aforementioned each embodiment is modified, or part technical characterictic wherein is equal to replacement.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection range of the present utility model.
Claims (3)
1. a loss-of-phase protection arrangement, is characterized in that, comprises battery main switch DK, the three-phase fuse FU1 to FU3 be connected in turn between three-phase alternating-current supply and three phase electric machine M, switch and the thermal relay FR of A.C. contactor KM; And,
Be connected to the coil of fuse FU5, the first start button SJ1, the second start button SJ2, Electromagnetic push-button KQ and Electromagnetic push-button KQ between the common port of switch of fuse FU3 and corresponding A.C. contactor KM and ground in turn, be connected in parallel on the first indicator light L1 at solenoid KQ two ends; And,
At the common port of the switch of fuse FU2 and corresponding A.C. contactor KM, with fuse FU1 with accordingly between the common port of the switch of A.C. contactor KM, be connected with the coil of fuse FU4, starting switch and A.C. contactor KM in turn, be connected in parallel on the first indicator light L2 at the coil two ends of A.C. contactor KM.
2. loss-of-phase protection arrangement according to claim 1, is characterized in that, described battery main switch DK comprises automatic air-break switch.
3. loss-of-phase protection arrangement according to claim 1; it is characterized in that; described fuse FU1 or fuse FU2 or fuse FU3 or fuse FU4 or fuse FU5, comprise the fuse that fuse that fuse that model is NT00-10 or model are RT16-00 or model are RT36-00.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220691372 CN202957581U (en) | 2012-12-14 | 2012-12-14 | Default phase protection device for motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220691372 CN202957581U (en) | 2012-12-14 | 2012-12-14 | Default phase protection device for motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202957581U true CN202957581U (en) | 2013-05-29 |
Family
ID=48463133
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220691372 Expired - Fee Related CN202957581U (en) | 2012-12-14 | 2012-12-14 | Default phase protection device for motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202957581U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103281015A (en) * | 2013-05-31 | 2013-09-04 | 中国电力工程顾问集团西南电力设计院 | Novel F-C loop configuration circuit |
-
2012
- 2012-12-14 CN CN 201220691372 patent/CN202957581U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103281015A (en) * | 2013-05-31 | 2013-09-04 | 中国电力工程顾问集团西南电力设计院 | Novel F-C loop configuration circuit |
| CN103281015B (en) * | 2013-05-31 | 2015-09-30 | 中国电力工程顾问集团西南电力设计院有限公司 | A kind of novel F-C loop configuration circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130529 Termination date: 20171214 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |