CN104836207A - Phase loss protection switch of three-phase motor - Google Patents
Phase loss protection switch of three-phase motor Download PDFInfo
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- CN104836207A CN104836207A CN201510251119.0A CN201510251119A CN104836207A CN 104836207 A CN104836207 A CN 104836207A CN 201510251119 A CN201510251119 A CN 201510251119A CN 104836207 A CN104836207 A CN 104836207A
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- phase
- motor
- power supply
- protection switch
- motor output
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Abstract
The present invention relates to a phase loss protection switch of a three-phase motor. The phase loss protection switch comprises metal spring switches and three-phase motor output ends and is characterized in that the three three-phase motor output ends are connected to three power supply input ends, the three metal spring switches are installed between the three-phase motor output ends and the three power supply input ends and are connected in parallel, the running of the three-phase motor is stopped when any one power supply is cut, the when any one phase of power supply is lacked, the other two phase current is increased, when the current is increased to a certain current value and any phase power supply of other two phase power supply is cut, the motor stops working automatically, and the purpose of motor phase loss protection is achieved.
Description
Technical field
The present invention relates to motor phase failure protective device field, particularly relate to a kind of open-phase protection switch of three phase electric machine.
Background technology
The switch used at present, only has the purposes for starting power supply, there is no the function of open-phase protection, this motor three-phase lack phase protection switch is compared with electronic motor three-phase lack phase protection switch, separately there are a kind of two-phase, three-phase current overcurrent protection switch, its panel has out and closes bottom two knobs and switch and load three manual overload protective devices, do not have ON/OFF operation, button just plays power supply opening effect: its shortcoming is: 1, volume is large, wiring is complicated; 2, after current overload in circuit disconnects to protective device, because protector reset knob is arranged on switch internal, after circuit overhauls, then need whole switch to take apart as it made to recover normal work from new connection protector, sometimes user also can be allowed to misunderstand and to think that this overload protection threephase switch is damaged, need to change the defects such as switch parts, bring very large inconvenience to user; Another will have been come by three push-botton operations, and complex structure high cost, can not accept by market.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of open-phase protection switch of three phase electric machine, and structure is simple, easy to operate, stable performance, operation, easy to maintenance, and more effectively can protect the protection of motor three-phase lack phase.
The technical solution adopted for the present invention to solve the technical problems is: the open-phase protection switch providing a kind of three phase electric machine; comprise metal clips switch and threephase motor output; it is characterized in that; described threephase motor output is divided into three to be connected with three power inputs respectively; three metal clips switches are installed between described threephase motor output and threephase motor output; three metal clips switches are interrelated, and wherein any one power cut-off threephase motor will be out of service.
This motor phase failure protection switch, by electric current, sheet metal is generated heat and produce action, when threephase motor has any phase power phase shortage, biphase current will increase thereupon in addition, when electric current increases to certain current value, any phase power supply of the power supply of two-phase disconnects in addition, and motor will shut down automatically, reaches the object of motor phase failure protection; Need motor normal operation just must get rid of the fault of power supply, motor could recover to run well, and recovers by manual operation button, must to connect three phase mains when running well.
beneficial effect
The present invention relates to a kind of open-phase protection switch of three phase electric machine, structure is simple, easy to operate, stable performance, operation, easy to maintenance, and more effectively can protect the protection of motor three-phase lack phase.
Accompanying drawing explanation
Fig. 1 is scarce picture protection fundamental diagram of the present invention.
Embodiment
Below in conjunction with specific embodiment, set forth the present invention further.Should be understood that these embodiments are only not used in for illustration of the present invention to limit the scope of the invention.In addition should be understood that those skilled in the art can make various changes or modifications the present invention, and these equivalent form of values fall within the application's appended claims limited range equally after the content of having read the present invention's instruction.
As shown in Figure 1; embodiments of the present invention relate to a kind of open-phase protection switch of three phase electric machine; comprise metal clips switch and threephase motor output; it is characterized in that; described threephase motor output is divided into three to be connected with three power inputs respectively; be provided with three metal clips switches between described threephase motor output and threephase motor output, three metal clips switches are interrelated, and wherein any one power cut-off threephase motor will be out of service.
This motor phase failure protection switch, by electric current, sheet metal is generated heat and produce action, when threephase motor has any phase power phase shortage, biphase current will increase thereupon in addition, when electric current increases to certain current value, any phase power supply of the power supply of two-phase disconnects in addition, and motor will shut down automatically, reaches the object of motor phase failure protection; Need motor normal operation just must get rid of the fault of power supply, motor could recover to run well, and recovers by manual operation button, must to connect three phase mains when running well.
Open-phase protection construction of switch of the present invention is simple, easy to operate, stable performance, operation, easy to maintenance, and more effectively can protect the protection of motor three-phase lack phase.
Claims (1)
1. the open-phase protection switch of a three phase electric machine; comprise metal clips switch and threephase motor output; it is characterized in that; described threephase motor output is divided into three to be connected with three power inputs respectively; three metal clips switches are installed between described threephase motor output and threephase motor output; three metal clips switches are interrelated, and wherein any one power cut-off threephase motor will be out of service.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510251119.0A CN104836207A (en) | 2015-05-15 | 2015-05-15 | Phase loss protection switch of three-phase motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510251119.0A CN104836207A (en) | 2015-05-15 | 2015-05-15 | Phase loss protection switch of three-phase motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104836207A true CN104836207A (en) | 2015-08-12 |
Family
ID=53813909
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510251119.0A Pending CN104836207A (en) | 2015-05-15 | 2015-05-15 | Phase loss protection switch of three-phase motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104836207A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2165559Y (en) * | 1993-09-24 | 1994-05-18 | 李德常 | Motor protector |
| CN2699556Y (en) * | 2004-03-07 | 2005-05-11 | 陈人华 | Phase-missing protecting equipment for three-phase motor |
| CN201994250U (en) * | 2011-02-21 | 2011-09-28 | 沈士涛 | Phase-failure overload protection switch |
| CN202094609U (en) * | 2011-05-13 | 2011-12-28 | 衡阳市大地泵业有限责任公司 | Improved structure for open-phase protection and overload protection of electric motor |
| CN202353193U (en) * | 2011-12-13 | 2012-07-25 | 陕西博华高低压开关成套设备制造有限公司 | Open phase protective device for appliance switch |
| CN202524066U (en) * | 2012-05-07 | 2012-11-07 | 沈士涛 | Motor default phase protection device |
-
2015
- 2015-05-15 CN CN201510251119.0A patent/CN104836207A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2165559Y (en) * | 1993-09-24 | 1994-05-18 | 李德常 | Motor protector |
| CN2699556Y (en) * | 2004-03-07 | 2005-05-11 | 陈人华 | Phase-missing protecting equipment for three-phase motor |
| CN201994250U (en) * | 2011-02-21 | 2011-09-28 | 沈士涛 | Phase-failure overload protection switch |
| CN202094609U (en) * | 2011-05-13 | 2011-12-28 | 衡阳市大地泵业有限责任公司 | Improved structure for open-phase protection and overload protection of electric motor |
| CN202353193U (en) * | 2011-12-13 | 2012-07-25 | 陕西博华高低压开关成套设备制造有限公司 | Open phase protective device for appliance switch |
| CN202524066U (en) * | 2012-05-07 | 2012-11-07 | 沈士涛 | Motor default phase protection device |
Non-Patent Citations (1)
| Title |
|---|
| 徐俏楣: "浅谈三相电动机的缺相保护", 《中国教育导刊》 * |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150812 |