CN202997519U - Verifying attachment of motor protector - Google Patents
Verifying attachment of motor protector Download PDFInfo
- Publication number
- CN202997519U CN202997519U CN 201220431529 CN201220431529U CN202997519U CN 202997519 U CN202997519 U CN 202997519U CN 201220431529 CN201220431529 CN 201220431529 CN 201220431529 U CN201220431529 U CN 201220431529U CN 202997519 U CN202997519 U CN 202997519U
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- protector
- verifying attachment
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Abstract
The utility model discloses a verifying attachment of a motor protector. The verifying attachment of the motor protector is mainly composed of a three-phase motor, a braking device and a control system, mainly comprises a main loop and a control loop, and is characterized in that the 380 V three-phase AC power supplies L1, L2 and L3 of the main loop pass a breaker QF1 and then are respectively connected with a verifying three-phase motor M1 and a band-type brake motor M2 via the normally open contacts of AC contactors KM1 and KM2, breakers QF2 are all in series connection in the three phase lines of the verifying three-phase motor M1, and a band-type brake device is arranged at the spindle nose of the verifying three-phase motor M1. The verifying attachment of the motor protector of the utility model can simulate the default phase case in a device application field, can simulate the locked-rotor of a motor to make the motor generate a large current, can be connected with a standard resistance box externally, can simulate whether the protector works when the device is in bad insulation, can realize a batch verification demand, can observe the action case of the protector visually, and enables the parts to be stopped running rapidly when meets with an emergency case; and by arranging a reset switch on a panel, a protector reset function can be finished without needing to switch a main breaker frequently.
Description
One, technical field
The utility model belongs to the inspection technology field of flame proof control cubicle part, is specifically related to a kind of verifying attachment of three-phase comprehensive motor protecter.
Two, background technology
Comprehensive motor protecter (hereinafter to be referred as motor protecter) is mainly used in usually having overload protection, open-phase protection, creepage protection function in various automatic control loops.Its product work principle major part is to collect motor operating current contrast setting value by transducer; when running current seriously transships, when the operation of long-time overcurrent or phase-deficient operation; or when the motor winding surpasses the safe range operation, stop motor being powered by motor protecter.In order to avoid burn-down of electric motor produces explosion hazard in the environment such as down-hole.
Conventional motors protector check usual way is for using one group of fixed current of strong current generator simulation output; the motor protecter transducer is through in the strong current generator output circuit; gather current value contrast setting parameter, check protection device operating characteristics by transducer.The Current rise curve that strong current generator produces large electric current is linear; and the general use of usual way is single-phase; back and forth be through in current protector three-phase transducer; three-phase current intensity is identical, real electrical machinery fault in service many because of motor be subjected to mechanical stall moment overload, break time phase shortage or the factor such as long-time three-phase imbalance cause.The electric current of three phase electric machine is former because changing value because of load variations or power-supply fluctuation etc.; therefore the protector that the use strong current generator is up to the standards easily occurs; run in actual applications power supply because of not timing phase shortage or the factor such as mechanical stall moment overload current is not steady; the situation that motor protecter is failure to actuate; traditional check system causes burn-down of electric motor, therefore can't detect motor protecter actual performance situation fully.
Three, summary of the invention
The purpose of this utility model is to provide a kind of motor protecter verifying attachment, has simulated machine most common failure factor in service, detects the every defencive function of protector and makes it to meet the concerned countries standard.
For achieving the above object, the utility model adopts technical scheme to be: the motor protecter verifying attachment mainly is made of three phase electric machine, brake apparatus and control system, comprises major loop and control loop.Major loop 380V three-phase alternating-current supply L1, L2, L3 connect check three phase electric machine M1, band-type brake motor M 2 through A.C. contactor KM1, KM2 normally opened contact respectively after circuit breaker Q F1; All be connected in series circuit breaker Q F2 in checking with three phase electric machine M1 three-phase line; With three phase electric machine M1 spindle nose, the brake sticking brake device is installed in check.
The utlity model has following characteristics:
1, check with all being connected in series circuit breaker Q F2 in three phase electric machine M1 three-phase line, can manually disconnect any phase motor main circuit, analog machine site of deployment phase shortage situation;
2, use braking brake brake inspection three phase electric machine M1, the simulated machine stall makes it produce large electric current, timekeeping system self-clocking during band-type brake work, prevent because of stall overlong time burn-down of electric motor, temperature detect switch (TDS) is installed on motor stator, motor overtemperature auto-breaking, series connection band-type brake contactor auxiliary contact in motor control loop, when preventing from closing because of band-type brake, misoperation damages motor;
3, reserve binding post, can external standard resistance box, during the analog machine defective insulation, whether protector moves;
4, motor main circuit is through in the motor protecter transducer, can realize many demands of check in batches;
5, motor protecter output termination indicator light can intuitively be observed protector action situation;
6, emergency stop switch is set, meets the emergency parts that can shut down rapidly, the erecting of panel reset switch does not need frequently to cut off main circuit breaker and can complete the protector reset function.
Four, description of drawings
Fig. 1 is the electrical schematic diagram of the utility model major loop:
Fig. 2 is the electrical schematic diagram of the utility model control loop.
Five, embodiment
The utility model comprises major loop and control loop, and major loop 380V three-phase alternating-current supply L1, L2, L3 connect check three phase electric machine M1, band-type brake motor M 2 through A.C. contactor KM1, KM2 normally opened contact respectively after circuit breaker Q F1.Control loop is by 380V three-phase alternating-current supply connection transformer TC1, and transformer TC1 output 220V alternating current connects power supply indicator HL1, A.C. contactor KM1 coil, A.C. contactor KM2 coil, auxiliary relay KA1 coil, auxiliary relay KA2 coil, time relay KT1 coil and running indicator light HL2; Connect motor protecter to be tested, auxiliary relay KA3 coil, protector output indicator HL3 by transformer TC1 output 36V alternating current.
Series connection A.C. contactor KM2 auxiliary contact in control loop, when preventing from closing because of band-type brake, misoperation damages motor.
Use on three phase electric machine M1 in check, be provided with temperature detect switch (TDS), prevent overheated burning for the protection of three phase electric machine.
During checked operation, close circuit breaker QF1, transformer TC1 get electric after; difference output AC 220V, 36V, tested motor protecter gets the 36V voltage starting by 101,103, and output drives and starts; indicator light HL3 should be often bright, can not light as HL3, judges that motor protecter is as defective.After HL3 lights, stir band-type brake switch S A1, band-type brake motor M 2 starts, and pressuring spring unclamps band-type brake.Press electric motor starting button SB1 this moment, A.C. contactor KM1 adhesive, and three phase electric machine M1 starts, and indicator light HL1 lights, and ammeter PA1, PA2, PA3 be indication motor M2 three-phase operation electric current respectively, should be less than the motor rated current after the motor stabilizing operation:
1, open-phase protection check:
Manual cut-off breaker QF2(1-3) any phase, in the inner winding three-phase of check motor M 1, one disconnects mutually, and no current passes through, and motor protecter is protected after check motor M 1 phase shortage being detected within a certain period of time, exports to drive to stop output, and HL3 extinguishes.Do not extinguish or do not meet national Specification opening time as HL3, being judged to be defective.
2, overload protection check:
restart motor, stir band-type brake switch S A1 and close band-type brake, after contactor KM2 dead electricity, band-type brake motor M 2 stops, band-type brake is closed under the tripping spring effect, time relay KT1 begins timing simultaneously, check motor M 1 front braking wheel is subjected to brake scotch to hold rear stall tightly, motor M 1 overload, in winding, electric current increases rapidly, motor protecter detects the check motor operating current greater than the setting current several times, protection within a certain period of time, output drives and stops output, HL3 extinguishes, after reaching 18 seconds as time relay KT1 timing, protector does not disconnect KA1, the KT1 action disconnects KM1, this moment, KA1 was still closed, HL3 does not extinguish.Do not extinguish or cross as HL3 and be loaded onto the time of HL3 between extinguishing and do not meet national Specification, be judged to be defective.
3, earth leakage protective check
Motor protecter detection of electrical leakage terminal 101,105 two ends connect the DC Standard Resistor case; the corresponding voltage grade is set respectively; adjusting resistance case resistance; range estimation indicator light HL3 changes; light when normal, extinguish after protection, the operation of recording value is conciliate drop lock; operating value is conciliate drop lock should meet the regulation of national standard, as do not meet be judged to be defective.
4, meeting emergency in testing process can be by lower panel emergency stop switch SB4, but cutting-off controlling transformer TC1 output 220V rear portion all power except power supply indicator, can complete rapidly braking, avoid accidents and enlarge.When protector can not automatically reset because of protection, can press reset switch SB3, by the power supply of tripping protection device, protector internal digital circuit reset is completed reset function.
Claims (4)
1. motor protecter verifying attachment, mainly consisted of by three phase electric machine, brake apparatus and control system, comprise major loop and control loop, it is characterized in that: major loop 380V three-phase alternating-current supply L1, L2, L3 connect check three phase electric machine M1, band-type brake motor M 2 through A.C. contactor KM1, KM2 normally opened contact respectively after circuit breaker Q F1; All be connected in series circuit breaker Q F2 in checking with three phase electric machine M1 three-phase line; With three phase electric machine M1 spindle nose, the brake sticking brake device is installed in check.
2. motor protecter verifying attachment according to claim 1, it is characterized in that: control loop is by 380V three-phase alternating-current supply connection transformer TC1, and transformer TC1 output 220V alternating current connects power supply indicator HL1, A.C. contactor KM1 coil, A.C. contactor KM2 coil, auxiliary relay KA1 coil, auxiliary relay KA2 coil, time relay KT1 coil and running indicator light HL2; Connect motor protecter to be tested, auxiliary relay KA3 coil, protector output indicator HL3 by transformer TC1 output 36V alternating current.
3. motor protecter verifying attachment according to claim 2, is characterized in that: series connection A.C. contactor KM2 auxiliary contact in control loop.
4. motor protecter verifying attachment according to claim 1, is characterized in that: on described check use three phase electric machine M1, be provided with temperature detect switch (TDS).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220431529 CN202997519U (en) | 2012-08-29 | 2012-08-29 | Verifying attachment of motor protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220431529 CN202997519U (en) | 2012-08-29 | 2012-08-29 | Verifying attachment of motor protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202997519U true CN202997519U (en) | 2013-06-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220431529 Expired - Fee Related CN202997519U (en) | 2012-08-29 | 2012-08-29 | Verifying attachment of motor protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202997519U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104345274A (en) * | 2014-10-29 | 2015-02-11 | 上海电机学院 | Motor rotor default phase fault simulation method and device |
| CN108181581A (en) * | 2018-03-19 | 2018-06-19 | 山东省产品质量检验研究院 | The intelligent test device and test method of a kind of residual current action protector |
| CN111965411A (en) * | 2020-07-20 | 2020-11-20 | 四川虹美智能科技有限公司 | Refrigerator locked-rotor protector verification device, method and system |
| CN113917222A (en) * | 2021-10-13 | 2022-01-11 | 无锡金田电子有限公司 | Method for calculating overload current of direct current brushless motor and protection device |
-
2012
- 2012-08-29 CN CN 201220431529 patent/CN202997519U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104345274A (en) * | 2014-10-29 | 2015-02-11 | 上海电机学院 | Motor rotor default phase fault simulation method and device |
| CN108181581A (en) * | 2018-03-19 | 2018-06-19 | 山东省产品质量检验研究院 | The intelligent test device and test method of a kind of residual current action protector |
| CN108181581B (en) * | 2018-03-19 | 2023-12-22 | 山东省产品质量检验研究院 | Intelligent testing device and testing method for residual current operated protector |
| CN111965411A (en) * | 2020-07-20 | 2020-11-20 | 四川虹美智能科技有限公司 | Refrigerator locked-rotor protector verification device, method and system |
| CN113917222A (en) * | 2021-10-13 | 2022-01-11 | 无锡金田电子有限公司 | Method for calculating overload current of direct current brushless motor and protection device |
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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: 20130612 Termination date: 20190829 |
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| CF01 | Termination of patent right due to non-payment of annual fee |