CN2138852Y - On-line anti-burning switch of motor - Google Patents
On-line anti-burning switch of motor Download PDFInfo
- Publication number
- CN2138852Y CN2138852Y CN 92233911 CN92233911U CN2138852Y CN 2138852 Y CN2138852 Y CN 2138852Y CN 92233911 CN92233911 CN 92233911 CN 92233911 U CN92233911 U CN 92233911U CN 2138852 Y CN2138852 Y CN 2138852Y
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- CN
- China
- Prior art keywords
- motor
- utility
- model
- switch
- boiled
- 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
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- Fuses (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model relates to an online anti-burning switch of a motor, which is a three-phase alternating current motor protector composed of an electronic circuit, a mechanical self-locking and electromagnetic tripping switch controlled by the electronic circuit. The utility model has the double function of temperature limiting protection and phase failure protection. The utility model has the advantages of compact structure, small size, convenient operation and reliable action. The utility model arranged on a motor wire connection box forms a whole with a motor. A temperature limiting fuse is arranged on the surface of a stator coil in the motor. The utility model can ensure that the motor is not burnt out under the condition of any electrical failure. The use of the utility model can eliminate all other protection for three-phase alternating current motors.
Description
The utility model belongs to the anti-protective device that burns of a kind of three-phase alternating-current motor.
Cause that the reason that three-phase alternating-current motor burns out has: the phase failure, overload, power supply quality is poor, ambient temperature is too high and electrical machinery fault etc.The hot relaying protection of current general employing prevents electromotor overload, prevents the operation of motor phase shortage with phase failure protector.Yet these two kinds of protections all will be by the supporting protection system of forming of A.C. contactor, and it installs inconvenience and function singleness, in use exists certain problem.
The purpose of this utility model takes to be suitable for the easily technological means of row exactly, and the anti-burning safeguard measure to motor implementation essence makes it not burnt out under various electric fault situations.
The online anti-boiled pass of the utility model motor is by electronic circuit and constituted by the mechanical self-latching of its control, electromagnetic trip switch, is contained in the shell.
Below in conjunction with accompanying drawing it is described in detail:
Fig. 1 is an electronic circuitry;
Fig. 2 is mechanical self-latching, electromagnetic trip switch front view;
Fig. 3 is mechanical self-latching, electromagnetic trip switch-side view.
Electronic circuit is made up of power circuit and operating circuit.Power circuit is by rectification diode D
1-6, resistance R
1And capacitor C
1Form.Operating circuit is by resistance R
2, R
3, zener diode D
7, capacitor C
2, unijunction transistor T
1, thyristor SCR, magnetictrip coil CT, current signal instrument transformer H
1-3, diode D
8-10, capacitor C
3-5, triode T
2-4With the warm fuse t ° composition of limit.Its principal character is: at unijunction transistor T
1Emitter and thyristor SCR negative electrode between in parallel one by current signal instrument transformer H
1-3, diode D
8-10, capacitor C
3-5, triode T
2-4With the tandem type sense control circuit of the warm fuse t ° composition of limit, limit warm fuse t ° to be installed on three-phase alternating-current motor internal stator coil surface.Limit the parameter of warm fuse to select according to the insulation of Electric Motor grade.The circuit working principle is: H during operate as normal
1-3The AC signal that induction produces is through D
8-10And C
3-5Be processed into direct current signal and add T respectively
2-4The input utmost point, make its saturation conduction, because T
2-4Output stage be parallel to D after t ° is connected
7Two ends, thus from positive source through R
2R
3Again through D
7To the circuit static working current of power cathode all by its bypass, D
7And C
2The two ends no-voltage is by R
3, C
2And T
1The enabling signal circuit of forming does not produce enabling signal.SCR is in off-state.Otherwise, work as H
1-3In any phase factor phase failure loss signal make this phase triode by or when limitting warm fuse blows because of motor over-temperature, the circuit static working current is just again from D
7By, C
2Voltage rises immediately, thus T
1Send enabling signal and make the SCR conducting, drive mechanical self-latching, the work of electromagnetic trip switch, cut off the electricity supply.
Mechanical self-latching, electromagnetic trip switch are made up of pillar moving contact frame (1), the boxlike stationary contact headstock (2) and magnetictrip support (3) and parts thereof.In pillar moving contact frame (1) inside three compression springs (4) are housed and compress three moving contacts (5).Side at pillar moving contact frame (1) has a self-locking grooves (6), self-locking when being used for switch closure.In pillar moving contact frame (1) below retracting spring (7) is housed.Three pairs of fixed contacts (8) and six terminal screws (9) are housed on the boxlike stationary contact headstock (2).Coil (10) and iron core (11) are housed on the magnetictrip support (3).The upper end of armature (12) has button pin (13), and the lower end links to each other with an end of back-moving spring (14).Armature (12) is installed on the support (3) with pivot pin (16), and the other end of back-moving spring (14) is fixed on the support (13), and support (3) is fixed as one with screw (15) with the boxlike stationary contact headstock (2).Operation principle is: when switch was pressed into make position, button pin (13) inserted under the effect of back-moving spring (14) from cotter way (6), and switch is locked in conducting state certainly.When motor breaks down, coil (10) (being CT) energising, iron core (11) produces magnetic force suction moving armature (12) makes button pin (13) withdraw from self-locking grooves (6).Under the effect of retracting spring (7), pillar moving contact frame (1) is got back to upper limit position, and switch disconnects.
The online anti-boiled pass of the utility model motor is installed on the motor connecting cartridge; combine as a whole with motor; its volume is little easy to use; reliable in action; dual-use function with protected by temperature limitation and open phase protection; can ensure that motor is not burnt out under any electric fault situation, be a kind of desirable triphase AC motor protector.
Claims (3)
1, one by electronic circuit be subjected to the mechanical self-latching of its control, the online anti-boiled pass of motor that the electromagnetic trip switch is formed, it is characterized in that operating circuit unijunction transistor T
1Between emitter and the thyristor SCR negative electrode in parallel one by current signal instrument transformer H
1-3Diode D
8-10Capacitor C
3-5, triode T
2-4Tandem type sense control circuit with the warm fuse t ° composition of limit.
2, according to the online anti-boiled pass of the described motor of claim 1, it is characterized in that limitting warm fuse t ° to be installed in three-phase alternating-current motor internal stator coil surface.
3, according to the online anti-boiled pass of the described motor of claim 1, it is characterized in that a side of the pillar moving contact frame (1) of switch has a self-locking grooves (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92233911 CN2138852Y (en) | 1992-09-15 | 1992-09-15 | On-line anti-burning switch of motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92233911 CN2138852Y (en) | 1992-09-15 | 1992-09-15 | On-line anti-burning switch of motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2138852Y true CN2138852Y (en) | 1993-07-21 |
Family
ID=33776115
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92233911 Expired - Fee Related CN2138852Y (en) | 1992-09-15 | 1992-09-15 | On-line anti-burning switch of motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2138852Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104319730A (en) * | 2014-09-29 | 2015-01-28 | 余姚市嘉荣电子电器有限公司 | Leakage protection plug |
-
1992
- 1992-09-15 CN CN 92233911 patent/CN2138852Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104319730A (en) * | 2014-09-29 | 2015-01-28 | 余姚市嘉荣电子电器有限公司 | Leakage protection plug |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| 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 |