CN2845267Y - Automatic phase selecting protector for three phase motor - Google Patents
Automatic phase selecting protector for three phase motor Download PDFInfo
- Publication number
- CN2845267Y CN2845267Y CN 200520068138 CN200520068138U CN2845267Y CN 2845267 Y CN2845267 Y CN 2845267Y CN 200520068138 CN200520068138 CN 200520068138 CN 200520068138 U CN200520068138 U CN 200520068138U CN 2845267 Y CN2845267 Y CN 2845267Y
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- Prior art keywords
- phase
- relay
- electric machine
- mains
- detector
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- Expired - Fee Related
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Abstract
The utility model relates to an automatic phase selecting protector for a three phase motor, which comprises a detector of a three phase power supply, the three phase power supply and terminals R, S and T of the three phase motor and also comprises relays j1, j2, j3, and j4, wherein the detector of the three phase power supply is distributed with the relays j1, j2, j3, and j4; the three phase power supply is connected with the detector of the three phase power supply by a conductor wire; the detector of the three phase power supply respectively detects the phase sequence, the lack phase and the imbalance of three phase voltage of the three phase power supply, and drives the relays j1, j2, j3 and j4. The automatic phase selecting protector for a three phase motor can make the three phase motor realize that the three phase motor is not energized when the phase is lacked and the three phase voltage is unbalanced; when the phase is wrong, a correct phase-sequence power supply is automatically input, and the three phase motor is normally operated.
Description
Technical field
The utility model relates to a kind of three phase electric machine apparatus for protecting power supply, relates to a kind of three phase electric machine specifically and selects the phase protector automatically.
Background technology
Three phase electric machine uses a phase sequence device all is housed usually now, is used for preventing that motor from reversing, phase shortage turns round, the imbalance of three-phase voltage running.The reverse of three phase electric machine can cause the damage or the irregular working of plant equipment, as compressor, blower fan etc.; Phase shortage, three-phase imbalance running easily cause motor to damage.Existing phase sequence device is generally controlled the A.C. contactor work of electric motor starting by protection switch, when three phase mains misphase, phase shortage, imbalance of three-phase voltage, and the protection switch no power, A.C. contactor is not worked, and motor can not turn round.Existing phase sequence device is owing to can not make troubles for the installation of equipment, use from the motion tracking phase sequence.As when installing, need the artificial phase sequence of adjusting; During use, equipment cisco unity malfunction when electrical network changes.Existing in addition phase sequence device need dispose an A.C. contactor and control three phase electric machine work, and the startup noise of A.C. contactor is big, has also increased distribution cost simultaneously.
Summary of the invention
Therefore; the purpose of this utility model is to provide a kind of three phase electric machine to select the phase protector automatically, and this phase protector that selects has the correct phase sequence power supply of automatic selection three phase electric machine, adopts light-current relay directly to control the startup of three phase electric machine simultaneously; reduce the startup noise, reduced distribution cost.
The purpose of this utility model is to realize like this.
A kind of three phase electric machine selects the phase protector automatically; comprise the three phase mains detector; three phase mains; three phase electric machine terminals R; S; T; also comprise relay j1; relay j2; relay j3; relay j4; described three phase mains detector is distributed with relay j1; relay j2; relay j3; relay j4; three phase mains links to each other with the three phase mains detector by lead; the three phase mains detector is respectively to the phase sequence of three phase mains; phase shortage; imbalance of three-phase voltage detects; drive relay j1; relay j2; relay j3; relay j4 action; a phase line of three phase mains respectively with relay j1; normally opened contact one end of relay j2 links to each other; another of three phase mains phase line respectively with relay j3; normally opened contact one end of relay j4 links to each other; the 3rd phase line of three phase mains directly links to each other with three phase electric machine terminals T; three phase electric machine terminals R respectively with relay j1; the normally opened contact other end of relay j3 links to each other, three phase electric machine terminals S respectively with relay j2; the normally opened contact other end of relay j4 links to each other.
Technique scheme also can be done further perfect.
Described three phase mains detector is distributed with relay j5, the normally opened contact of the relay j5 that connected on the 3rd phase line of three phase mains and the lead that three phase electric machine terminals T links to each other.
This three phase electric machine selects the phase protector that three phase electric machine is realized automatically: when phase shortage, imbalance of three-phase voltage, and the three phase electric machine no power; When misphase, import correct phase sequence power supply automatically, three phase electric machine is run well.
The utility model structural design advantages of simple had both reduced distribution cost, had reduced the startup noise again, made motor can not produce the reverse phenomenon simultaneously, had avoided the trouble of installing and using.
Description of drawings
Embodiment
The utility model is described in further detail below by embodiment and accompanying drawing.
Claims (2)
1; a kind of three phase electric machine selects the phase protector automatically; comprise the three phase mains detector; three phase mains; three phase electric machine terminals R; S; T; it is characterized in that: also comprise relay j1; relay j2; relay j3; relay j4; described three phase mains detector is distributed with relay j1; relay j2; relay j3; relay j4; three phase mains links to each other with the three phase mains detector by lead; the three phase mains detector is respectively to the phase sequence of three phase mains; phase shortage; imbalance of three-phase voltage detects; drive relay j1; relay j2; relay j3; relay j4 action; a phase line of three phase mains respectively with relay j1; normally opened contact one end of relay j2 links to each other; another of three phase mains phase line respectively with relay j3; normally opened contact one end of relay j4 links to each other; the 3rd phase line of three phase mains directly links to each other with three phase electric machine terminals T; three phase electric machine terminals R respectively with relay j1; the normally opened contact other end of relay j3 links to each other, three phase electric machine terminals S respectively with relay j2; the normally opened contact other end of relay j4 links to each other.
2, select the phase protector automatically according to the described three phase electric machine of claim 1; it is characterized in that: described three phase mains detector is distributed with relay j5, the normally opened contact of the relay j5 that connected on the 3rd phase line of three phase mains and the lead that three phase electric machine terminals T links to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520068138 CN2845267Y (en) | 2005-11-20 | 2005-11-20 | Automatic phase selecting protector for three phase motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520068138 CN2845267Y (en) | 2005-11-20 | 2005-11-20 | Automatic phase selecting protector for three phase motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2845267Y true CN2845267Y (en) | 2006-12-06 |
Family
ID=37487209
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520068138 Expired - Fee Related CN2845267Y (en) | 2005-11-20 | 2005-11-20 | Automatic phase selecting protector for three phase motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2845267Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101420118B (en) * | 2007-10-22 | 2013-06-05 | 三电有限公司 | Drive control device of three-phase motor |
-
2005
- 2005-11-20 CN CN 200520068138 patent/CN2845267Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101420118B (en) * | 2007-10-22 | 2013-06-05 | 三电有限公司 | Drive control device of three-phase motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C57 | Notification of unclear or unknown address | ||
| DD01 | Delivery of document by public notice |
Addressee: Xiong Xiaoqiang Document name: Notification of Termination of Patent Right |
|
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |