CN202134899U - Motor overload protector - Google Patents
Motor overload protector Download PDFInfo
- Publication number
- CN202134899U CN202134899U CN201120259462U CN201120259462U CN202134899U CN 202134899 U CN202134899 U CN 202134899U CN 201120259462 U CN201120259462 U CN 201120259462U CN 201120259462 U CN201120259462 U CN 201120259462U CN 202134899 U CN202134899 U CN 202134899U
- Authority
- CN
- China
- Prior art keywords
- reed
- overload protector
- metal tube
- wiring board
- fixed
- 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.)
- Expired - Fee Related
Links
Landscapes
- Thermally Actuated Switches (AREA)
- Protection Of Generators And Motors (AREA)
Abstract
The utility model discloses a motor overload protector. A positive wiring board and a negative wiring board are arranged on an insulated housing; fixed contacts are arranged on the positive wiring board; a reed is arranged on the negative wiring board; the other end of the reed is provided with a moving contact; a metal tube is fixed on the insulated housing through a fixed bolt; a temperature-sensitive filament of shape memory alloy is arranged in the metal tube; one end of the temperature-sensitive filament of shape memory alloy is fixed on a bottom of the metal tube; and the other end of the temperature-sensitive filament of shape memory alloy is connected with the reed through an insulation block. Compared with an electrothermal relay, the overload protector provided by the utility model has a relatively simple structure; the cost is low; and installation and maintenance are convenient. An electrothermal relay and a thermistor circuit are replaced by the overload protector; the overload protection problem of a three phase motor can be radically solved; and good social effect and economic effect can be generated.
Description
Technical field
The utility model relates to a kind of technical field of protective overload circuit-breakin.A kind of overload protective device that is used to guarantee the motor safe operation promptly is provided.
Background technology
The open phase protection problem of threephase motor does not well solve so far at present.According to statistics.In the burnout failure of motor.Have more than 70% is that overload by motor causes phase shortage to cause.Existing threephase motor overload protective device mainly contains two kinds of thermal relay and thermistors.Thermal relay system is by thermal resistance wire, and bimetal leaf and pair of contact are formed, because it adopts the bimetal leaf structure, and the expansion of bimetal leaf is linear.Thereby it can not the time in time cut off the electricity supply in overload completely, still can not stop the generation that motor is burnt out accident fully.The thermosensitive resistance type protector adopts thermistor to make temperature sensor.Amplify the relay that drives the control motor switch through electronic circuit, its shortcoming is exactly the cost height.And performance receives the influence of electronic component quality, poor stability when using for a long time, the also difficult maintenance of debugging trouble.
The utility model content
The purpose of the utility model provides a kind of both safe and reliable.Overload protective device with thermal relay and thermistor advantage simple in structure again.
The technical scheme of the utility model is that a kind of motor overload protector has positive terminal block, negative terminal block on insulation shell; On positive terminal block, fixed contact is arranged, reed is housed, moving contact is arranged at the other end of reed at negative terminal block; On insulation shell, pass through set bolt fixing metal pipe; A marmem thermosensitive wire is housed in metal tube, and marmem thermosensitive wire one end is fixed on the metal tube bottom, and the marmem thermosensitive wire other end is connected on the reed through collets.
Described marmem thermosensitive wire is a Ti-Ni marmem.
The overload protective device that the utility model provided is compared with thermal relay, and then structure is comparatively simple, and cost is low.And be convenient to I&M.Overload protective device with the utility model replaces thermal relay and thermosensitive resistor and circuit, can fundamentally solve the overload protection problem of threephase motor, can produce good social effect and economic benefits.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Embodiment
As shown in Figure 1, a kind of motor overload protector has positive terminal block 4, negative terminal block 5 on insulation shell 2; On positive terminal block 4, fixed contact 3 is arranged; At negative terminal block 5 reed 6 is housed, moving contact 1 is arranged at the other end of reed 6, on insulation shell 2 through set bolt 9 fixing metal pipes 7; A marmem thermosensitive wire 8 is housed in metal tube 7; Marmem thermosensitive wire 8 one ends are fixed on metal tube 7 bottoms, and marmem thermosensitive wire 8 other ends are connected on the reed 6 through collets 10, and described marmem thermosensitive wire 8 is Ti-Ni marmems.
Memorial alloy thermosensitive wire 8 is processed by Ti-Ni marmem, and the one of which end is connected with reed 6 through collets 10.During use 8 of metal tubes are gone in the motor winding.Current path when moving contact 1 forms operate as normal with fixed contact 3, this circuit is connected with the control circuit of threephase motor.Meanwhile, embed the memorial alloy thermosensitive wire 8 in the motor winding, when measuring its heating temp and surpassing the transformation temperature of memorial alloy thermosensitive wire 8, memorial alloy thermosensitive wire 8 shrinks, and affects reed 6 downwards, and moving contact 1 and fixed contact 3 are separated.Current path promptly is cut off, and motor is protected, behind the failure of current.Memorial alloy thermosensitive wire 8 is progressively cooling down, when its temperature drops to memorial alloy thermosensitive wire 8 transformation temperatures when following.8 elongations of memorial alloy thermosensitive wire.This moment, it disappeared to the pulling force of reed 6.Then owing to the effect of reed 6 elastic-restoring forces, moving contact 1 is connected with fixed contact 3.This moment, circuit was connected thereupon, and motor is reruned.
Claims (2)
1. motor overload protector; It is characterized in that: positive terminal block (4), negative terminal block (5) are arranged on insulation shell (2); On positive terminal block (4), fixed contact (3) is arranged, reed (6) is housed, moving contact (1) is arranged at the other end of reed (6) at negative terminal block (5); Go up through set bolt (9) fixing metal pipe (7) at insulation shell (2); A marmem thermosensitive wire (8) is housed in metal tube (7), and marmem thermosensitive wire (8) one ends are fixed on metal tube (7) bottom, and marmem thermosensitive wire (8) other end is connected on the reed (6) through collets (9).
2. motor overload protector according to claim 1 is characterized in that: described marmem thermosensitive wire (8) is a Ti-Ni marmem.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120259462U CN202134899U (en) | 2011-07-21 | 2011-07-21 | Motor overload protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120259462U CN202134899U (en) | 2011-07-21 | 2011-07-21 | Motor overload protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202134899U true CN202134899U (en) | 2012-02-01 |
Family
ID=45523656
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120259462U Expired - Fee Related CN202134899U (en) | 2011-07-21 | 2011-07-21 | Motor overload protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202134899U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105048412A (en) * | 2015-09-06 | 2015-11-11 | 重庆民生变压器有限责任公司 | Transformer over-temperature protection device |
| CN109095117A (en) * | 2018-06-27 | 2018-12-28 | 安徽台达塑胶科技有限公司 | A kind of simple automatic start-stop device of screw feeding machine |
-
2011
- 2011-07-21 CN CN201120259462U patent/CN202134899U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105048412A (en) * | 2015-09-06 | 2015-11-11 | 重庆民生变压器有限责任公司 | Transformer over-temperature protection device |
| CN109095117A (en) * | 2018-06-27 | 2018-12-28 | 安徽台达塑胶科技有限公司 | A kind of simple automatic start-stop device of screw feeding machine |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202134899U (en) | Motor overload protector | |
| CN202102964U (en) | Outage delay overheat protector | |
| CN201868365U (en) | Fuse protector | |
| CN203553041U (en) | Miniature bimetallic strip type overheating protector | |
| CN201189106Y (en) | Water drinking device with protection circuit | |
| CN101895105A (en) | Short-circuit preventing device of voltage dependent resistor of large-discharge-current surge protector | |
| CN201616636U (en) | Intelligent thawing device for bus portal frame of substation | |
| CN203434386U (en) | Safety socket with over current protection function | |
| CN2483875Y (en) | Protector for electric appliance circuit | |
| CN106655139B (en) | Surge Protector | |
| CN205622596U (en) | Get rid of intelligence that condensation prevents burning out and converge flow box | |
| CN203263009U (en) | Electric heating cooking utensil | |
| CN205583643U (en) | Lightning safety monitoring protection device | |
| CN203588936U (en) | Heat protector | |
| CN103308198A (en) | Temperature-controlled switch cabinet wireless overheat alarm device | |
| CN203242858U (en) | Safe socket assembly with over-current protection | |
| CN207967924U (en) | A kind of protective relaying device of electric system | |
| CN202502902U (en) | Overheat-protection type low-voltage compensation power capacitor | |
| CN210245434U (en) | Push type alarming non-tripping device | |
| CN107154325B (en) | Overload alarm non-tripping device of circuit breaker | |
| CN204905022U (en) | Take generate heat general insulating guard shield of attention device of electric terminal | |
| CN104332358A (en) | Thermal relay | |
| CN214378302U (en) | Contact temperature protection device and low-voltage circuit breaker | |
| CN206697430U (en) | A kind of protection device for breaker of plastic casing | |
| CN214542025U (en) | Induction type temperature protector |
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: 20120201 Termination date: 20150721 |
|
| EXPY | Termination of patent right or utility model |