CN2812269Y - Built-in three-phase thermal overload relaying protection unit - Google Patents
Built-in three-phase thermal overload relaying protection unit Download PDFInfo
- Publication number
- CN2812269Y CN2812269Y CN 200520003154 CN200520003154U CN2812269Y CN 2812269 Y CN2812269 Y CN 2812269Y CN 200520003154 CN200520003154 CN 200520003154 CN 200520003154 U CN200520003154 U CN 200520003154U CN 2812269 Y CN2812269 Y CN 2812269Y
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- China
- Prior art keywords
- upper contact
- winding coil
- phase motor
- communicated
- sheets
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- 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.)
- Expired - Fee Related
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- Protection Of Generators And Motors (AREA)
- Thermally Actuated Switches (AREA)
Abstract
The utility model relates to a thermal overload relaying protection device which can protect a three-phase motor. An insulating sheet is arranged between an upper contact elastic sheet and a thermal bimetal sheet, and three non-communicated upper contact elastic sheets and three non-communicated lower contact connection sheets are arranged. When a winding coil of the three-phase motor is overheated because of increased overloading of current to exceed the permitted temperature increment values, the thermal bimetal sheets in the thermal overload relaying protection device of the three-phase motor loaded in the winding coil of the three-phase motor instantly deform and tilt up in a negative direction to simultaneously push away the three non-connected upper contact elastic sheet on the insulating sheet so as to separate the contacts of the three non-communicated upper contact elastic sheets with the normally closed contacts on the three non-communicated lower contact connection sheets. At the same time, the three-phase current is instantly cut off to flow from the three non-communicated upper contact elastic sheets, so no current flows through the winding coil of the three-phase motor so as to protect the winding coil of the three-phase motor from being burnt out.
Description
Affiliated technical field
The utility model relates to a kind of protective device of loading type threephase motor thermal overload relay protector.
Background technology
At present, known threephase motor protective device has the A.C. contactor of circumscribed and the threephase motor protective device that thermal overload relay is used.Another kind is to be enclosed in thermistor on the winding coil of threephase motor and an external motor protecting device that electronic controller is used.Also having a kind of is the thermal protector that is enclosed on the single-phase motor winding coil.Because its structure is limit, it can only be protected on small-sized monophase machine and the electrical micro-machine, and can not protect threephase motor.
Summary of the invention
Can not protect the deficiency of threephase motor in order to overcome existing embedded thermal protection device.The utility model provides a kind of loading type threephase motor thermal overload relay protector.
The technical scheme that its technical problem that solves the utility model adopts is in the three-phase thermal overload relay protector on the threephase motor winding coil of packing into, between 3 not connected shell fragments that thrermostatic bimetal-plate and three-phase current pass through 1 insulation spacer is set.When the threephase motor winding coil is worked under overload situations, winding coil will increase significantly heating because of electric current.Surpass when allowing temperature rise value; thrermostatic bimetal-plate is out of shape in the other direction with regard to moment and upwarps, insulation spacer on the top, thus backed down 3 normally-closed contacts on 3 not connected shell fragments; disconnect the electric current in the threephase motor winding coil simultaneously, protected the threephase motor winding coil not by overheated and burn out.
The beneficial effects of the utility model are can be used on the threephase motor winding coil of packing into, have protected the threephase motor winding coil to be burnt out because of overload is overheated easily.Thereby the safety and the personal safety of three dynamo-electric motivations and whole power-equipment have been protected.The present utility model circuit and mechanical structure are simple and practical.
Description of drawings
Below in conjunction with drawings and Examples the present utility model is further specified.
Fig. 1 is that the utility model master looks sectional structural map.
Fig. 2 is main TV structure schematic diagram.
Fig. 3 overlooks section Shell structure figure.
Fig. 4 is the plan structure schematic diagram.
1 shell among the figure, 2 cover plates, 3 upper contact head shell fragments, 4 insulation spacers, 5 thermo bimetals are support point fixedly, 6 thrermostatic bimetal-plates, 7 times contact braces, electrical insulation spacer between 8 phase lines.
Embodiment.
In Fig. 2 and Fig. 4, under the threephase motor normal operation, three-phase current in the motor is from 3 not connected contact braces (7) down, by 3 normally closed 3 not connected upper contact head shell fragments (3), flow to (sense of current also can reverse wiring) of threephase motor winding coil again.Thereby make threephase motor be in the normal operation operating state.Threephase motor is under rated condition during long-term work; the temperature rise of winding coil can not surpass permissible value; when under overload situations, working; winding coil is because of the significantly heating of increase of electric current; overheated when winding coil and thrermostatic bimetal-plate (6) in the threephase motor thermal overload relay protector on the threephase motor winding coil of packing into when surpass allowing temperature rise value will upwarp moment in the other direction; insulation spacer on the top (4), make simultaneously 3 on the not connected upper contact head shell fragment (3) the contact and the normally closed interlock moment on 3 not connected following contact braces (7) disconnect.Thereby make electric current moment disconnection in the machine winding coil, threephase motor shuts down, and has played protection because of overheated effect of burning threephase motor.
Claims (4)
1. threephase motor thermal overload relay protector; it is by shell; 3 not connected upper contact head shell fragments; 3 not connected following contact lead braces; insulation spacer, thrermostatic bimetal-plate, the thrermostatic bimetal-plate support point is formed; it is characterized in that between 3 not connected upper contact head shell fragments and thrermostatic bimetal-plate an insulation spacer (4) being arranged.
2. this thermal protector is characterized in that having 3 not connected upper contact head shell fragments (3).
3. this thermal protector is characterized in that having 3 not connected following contact power source connecting (7).
4. according to claim 2 and 3 described thermal protectors, it is characterized in that having 6 lead connectors (3,7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520003154 CN2812269Y (en) | 2005-01-11 | 2005-01-11 | Built-in three-phase thermal overload relaying protection unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520003154 CN2812269Y (en) | 2005-01-11 | 2005-01-11 | Built-in three-phase thermal overload relaying protection unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2812269Y true CN2812269Y (en) | 2006-08-30 |
Family
ID=36938658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520003154 Expired - Fee Related CN2812269Y (en) | 2005-01-11 | 2005-01-11 | Built-in three-phase thermal overload relaying protection unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2812269Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106058818A (en) * | 2016-07-20 | 2016-10-26 | 泉州劲鑫电子有限公司 | Electric vehicle high-capacity nickel hydrogen power battery overload protector |
-
2005
- 2005-01-11 CN CN 200520003154 patent/CN2812269Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106058818A (en) * | 2016-07-20 | 2016-10-26 | 泉州劲鑫电子有限公司 | Electric vehicle high-capacity nickel hydrogen power battery overload protector |
| CN106058818B (en) * | 2016-07-20 | 2018-08-21 | 泉州劲鑫电子有限公司 | A kind of electric vehicle high power capacity Ni-MH power cell overload protective device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060830 Termination date: 20140111 |