CN204028321U - Motor detection device - Google Patents
Motor detection device Download PDFInfo
- Publication number
- CN204028321U CN204028321U CN201420314133.1U CN201420314133U CN204028321U CN 204028321 U CN204028321 U CN 204028321U CN 201420314133 U CN201420314133 U CN 201420314133U CN 204028321 U CN204028321 U CN 204028321U
- Authority
- CN
- China
- Prior art keywords
- phase
- motor
- power supply
- electrically connected
- switch
- 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 - Lifetime
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 60
- 238000000819 phase cycle Methods 0.000 claims abstract description 78
- 230000001012 protector Effects 0.000 claims description 4
- 238000012360 testing method Methods 0.000 description 15
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 7
- 230000002159 abnormal effect Effects 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
Landscapes
- Control Of Electric Motors In General (AREA)
Abstract
The utility model discloses a motor detection device, which comprises a phase sequence detection module and a first indicator light; a first wiring point of the phase sequence detection module is connected with a first phase of the power supply, a second wiring point of the phase sequence detection module is connected with a second phase of the power supply, and a third wiring point of the phase sequence detection module is connected with a third phase of the power supply and is used for detecting the phase sequence connection of the power supply; the output end of the phase sequence detection module is electrically connected with the first switch, and the first switch is controlled to be closed according to the detected phase sequence connection of the power supply; one end of the first switch is electrically connected with the zero line, and the other end of the first switch is electrically connected with the motor; the first end of the first indicator light is electrically connected with the first phase of the power supply, and the second end of the first indicator light is electrically connected with the motor. The phase sequence of the power supply is detected through the phase sequence detection module, the connection correctness of the phase sequence of the power supply is guaranteed, and the problem that the service life of the motor is influenced due to the fact that the motor is reversed when the phase sequence of the power supply is reversely connected is solved.
Description
Technical field
The utility model relates to electrical equipment detection field, particularly relates to a kind of motor detection apparatus.
Background technology
At present, be usually electrically connected with A.C. contactor by the extension line of three-phase supply when motor detects, the extension line of A.C. contactor is connected with motor, realizes testing feeding electric motors.But three-phase supply and motor all have phase sequence.In galvanization, be easy to occur that the phase sequence of motor and the phase sequence of three-phase supply connect and instead cause motor reversal, thus affect the serviceable life of motor.
Utility model content
Based on this, when being necessary to detect for motor, occurring that the phase sequence of motor and the phase sequence of three-phase supply connect and instead cause motor reversal and affect the problem in motor serviceable life, a kind of motor detection apparatus is provided.
For realizing a kind of motor detection apparatus that the utility model object provides, comprise Phase sequence detection module and the first pilot lamp;
First wiring point of described Phase sequence detection module connects the first-phase of power supply, second wiring point of described Phase sequence detection module connects the second-phase of described power supply, 3rd wiring point of described Phase sequence detection module connects the third phase of described power supply, connects for the phase sequence detecting described power supply;
The output terminal of described Phase sequence detection module is electrically connected with the first switch, and the phase sequence according to the described power supply detected connects, and controls the closed of described first switch;
One end of described first switch is electrically connected with zero line, and the other end of described first switch is electrically connected with motor;
The first end of described first pilot lamp is electrically connected with the first-phase of described power supply, and the second end of described first pilot lamp is electrically connected with described motor.
Wherein in an embodiment, described Phase sequence detection module is phase sequence relay.
Wherein in an embodiment, the inside of described motor is provided with temperature limiter;
The other end of described first switch is electrically connected with the first link of described temperature limiter;
The first-phase of described power supply is electrically connected with the second link of described temperature limiter.
Wherein in an embodiment, also comprise starting switch;
The first end of described starting switch is electrically connected with the first-phase of described power supply, and the second end of described starting switch is electrically connected with the first contact of A.C. contactor;
Second contact of described A.C. contactor is electrically connected with the second link of described temperature limiter;
Wherein, described starting switch is knock type switch.
Wherein in an embodiment, also comprise emergency stop switch;
The first end of described emergency stop switch is electrically connected with the first-phase of described power supply, and the second end of described emergency stop switch is electrically connected with the first end of described starting switch.
Wherein in an embodiment, the first end of the normally opened contact of described A.C. contactor is electrically connected with the first end of described starting switch;
Second end of described normally opened contact is electrically connected with the second end of described starting switch.
Wherein in an embodiment, the first end of the auxiliary normally opened contact of described A.C. contactor is electrically connected with the first-phase of described power supply;
Second end of described auxiliary normally opened contact is electrically connected with one end of the second pilot lamp;
The other end of described second pilot lamp is electrically connected with the first link of described temperature limiter.
Wherein in an embodiment, one end of one end of first group of main contact of described A.C. contactor, one end of second group of main contact and the 3rd group of main contact is electrically connected with the third phase of the first-phase of described power supply, the second-phase of described power supply and described power supply respectively;
The other end of described first group of main contact of described A.C. contactor, the other end of described second group of main contact and the other end of described 3rd group of main contact are electrically connected with the third phase of the first-phase of described motor, the second-phase of described motor and described motor respectively.
Wherein in an embodiment, described temperature limiter is thermal protector.
The beneficial effect of above-mentioned motor detection apparatus is: by arranging Phase sequence detection module and the first pilot lamp; Whether the first wiring point of Phase sequence detection module, the second wiring point and the 3rd wiring point are electrically connected with the first-phase of power supply, second-phase and third phase respectively, connect correct for the phase sequence detecting power supply.The output terminal of Phase sequence detection module is electrically connected with the first switch, when Phase sequence detection module detects that the phase sequence of power supply connects correct, control the first switch to close, thus the loop be made up of the first-phase of power supply, the first pilot lamp, motor, the first switch and zero line is close access, make the first pilot lamp bright, correct to point out the phase sequence of testing staff's power supply to connect, can detect motor.It is before carrying out electric machines test, the phase sequence detected to the power supply of feeding electric motors by Phase sequence detection module is connected, and the testing result pointing out the phase sequence of testing staff's power supply to connect by the first pilot lamp, ensure that the correctness that the phase sequence of the power supply of access motor connects, thus the phase sequence of the phase sequence and motor that efficiently avoid power supply connects and instead causes motor reversal, affect the problem in the serviceable life of motor.
Accompanying drawing explanation
Fig. 1 is motor detection apparatus one specific embodiment circuit diagram.
Embodiment
For making technical solutions of the utility model clearly, below in conjunction with drawings and the specific embodiments, the utility model is described in further details.
See Fig. 1, as the motor detection apparatus of a specific embodiment, comprise Phase sequence detection module PM and the first pilot lamp HL1.Wherein:
The first wiring point L1 of Phase sequence detection module PM connects the first-phase L1 ' of power supply, and the second wiring point L2 of Phase sequence detection module PM connects the second-phase L2 ' of power supply, and the 3rd wiring point L3 of Phase sequence detection module PM connects the third phase L3 ' of power supply.By the first wiring point L1, the second wiring point L2 of Phase sequence detection module PM and first-phase L1 ', the second-phase L2 ' of the 3rd wiring point L3 difference electric connection of power supply and third phase L3 ', realize detecting the object whether the phase sequence connection of power supply is correct.
The output terminal of Phase sequence detection module PM is electrically connected with the first K switch 1, and the phase sequence according to the power supply detected connects, and controls the closed of the first K switch 1.
Wherein the first K switch 1 can be normal open switch.As: when Phase sequence detection module PM detects that the phase sequence of power supply connects correct, then control the first K switch 1 and close; When Phase sequence detection module PM detects that the phase sequence malunion of power supply is true, then the first K switch 1 remains open state.
One end of first K switch 1 is electrically connected with zero line N, and the other end of the first K switch 1 is electrically connected with motor M.
The first end of the first pilot lamp HL1 is electrically connected with the first-phase L1 ' of power supply, and second end of the first pilot lamp HL1 is electrically connected with motor M.The first-phase L1 ' of power supply, the first pilot lamp HL1, motor M, the first K switch 1 and zero line N is made to form a loop.
When Phase sequence detection module PM detects that the phase sequence of power supply connects correct, then the first K switch 1 closes, thus the loop making the first-phase L1 ' of power supply, the first pilot lamp HL1, motor M, the first K switch 1 and zero line N combine is close access, first pilot lamp HL1 has electric current to pass through, thus make the first pilot lamp HL1 bright, the phase sequence of prompting testing staff motor M connects correctly with the phase sequence of power supply (namely the phase sequence of power supply connects with the phase sequence of motor M consistent), can carry out the detection of motor M (i.e. load to be measured).
When Phase sequence detection module PM detects that the phase sequence malunion of power supply is true, first K switch 1 remains open state, the loop of being combined by first-phase L1 ', the first pilot lamp HL1 of power supply, motor M, the first K switch 1 and zero line N is open circuit, first pilot lamp HL1 does not work, thus the phase sequence connection of prompting testing staff power supply may connect anti-, need the position of the connecting line adjusting power supply, till the first pilot lamp HL1 is bright.It efficiently avoids because the phase sequence of power supply and the phase sequence of motor M connect instead, cause the phenomenon that motor M is reversed, the problem that the serviceable life solving motor M shortens.
Wherein, it should be noted that, Phase sequence detection module PM can be phase sequence relay.
When the phase sequence being detected power supply by Phase sequence detection module PM is connected correctly, upper electro-detection can be carried out to motor M.Powering in testing process to motor M, as the utility model one specific embodiment, the inside of motor M is provided with temperature limiter, for realizing self-protection function when temperature is too high in motor M operational process.Wherein, the other end of the first K switch 1 is electrically connected with the first link T2 of temperature limiter.
The first-phase of power supply is electrically connected with the second link T1 of temperature limiter.
Arranging temperature limiter by the inside in motor M, making when running under the power supply of motor M at power supply, if motor M overload operation, motor M heating is too high, and after temperature reaches the protection value of temperature limiter, the contact of temperature limiter disconnects automatically, and motor M is out of service.Treat motor M a period of time out of service, after temperature dropped to a certain extent, the contact of temperature limiter closes automatically, and motor M is in power supply state again, automatically runs.
Wherein, temperature limiter can be the built-in thermal protector of motor M.
Although by arranging thermal protector (i.e. temperature limiter) in motor M, achieve motor M temperature too high time self-protection function.But the repetition start and stop of motor M also can affect the serviceable life of motor M.And be easy to the false judgment of the testing result causing motor M, affect the test findings of motor M temperature rise test.
For avoiding motor M to repeat start and stop, causing the problem that motor M testing result is judged by accident, as the motor detection apparatus of a specific embodiment, also comprising starting switch S1.Wherein, starting switch S1 is knock type switch.
The first end 11 of starting switch S1 is electrically connected with the first-phase L1 ' of power supply, and second end 12 of starting switch S1 is electrically connected with the first contact A1 of A.C. contactor KM1.
The second contact A2 of A.C. contactor KM1 is electrically connected with the second link T1 of temperature limiter.
By arranging the starting switch S1 of knock type between A.C. contactor KM1 and power supply, when Phase sequence detection module PM detects that the phase sequence of power supply connects correctly, artificial presses starting switch S1.Now, power supply and contactor KM1 path, contactor KM1 obtains electric, and motor M is run.
Run after a period of time until motor M, when temperature rises to the protection value of temperature limiter, the contact of temperature limiter disconnects, and A.C. contactor KM1 dead electricity, motor M is out of service.When after motor M certain hour out of service, temperature drops to a certain degree.Now, the starting switch S1 connected due to control power supply and A.C. contactor KM1 is knock type switch, therefore, must be artificial press starting switch S1, power supply and A.C. contactor KM1 just can be made to reclose, A.C. contactor KM1 is obtained electric, realize the operation again of motor M.Which obviate the automatic operation that the built-in temperature limiter of motor M recovers rear motor M, prevent the repetition start and stop of motor M, cause the phenomenon of the testing result erroneous judgement to motor M temperature rise test.Meanwhile, also solve motor M and repeat the problem that start and stop affect the serviceable life of motor M, prevent motor automatically to recover to start the unnecessary electrical safety accident caused.
At this, it should be noted that, the first end 13 of the normally opened contact KM1 ' of A.C. contactor KM1 is electrically connected with the first end 11 of starting switch S1; Second end 14 of the normally opened contact KM1 ' of A.C. contactor KM1 is electrically connected with second end 12 of starting switch S1.
The auxiliary normally opened contact KM1 of A.C. contactor KM1 " ' first end 15 be electrically connected with the first-phase L1 ' of power supply; The auxiliary normally opened contact KM1 of A.C. contactor KM1 " ' the second end 16 be electrically connected with one end of the second pilot lamp HL2.
The other end of the second pilot lamp HL2 is electrically connected with the first link T2 of temperature limiter.
Wherein, the second pilot lamp HL2 is the run indicator of motor M.When the second pilot lamp HL2 is bright, show that motor M is in running status; When the second pilot lamp HL2 does not work, show that motor M is in halted state.
See Fig. 1, it should be noted that, A.C. contactor KM1 comprises three groups of main contact KM1 ", wherein:
Three groups of main contact KM1 of A.C. contactor KM1 " in one end 3 of 1, the second group of main contact in one end of first group of main contact and one end 5 of the 3rd group of main contact be electrically connected with the third phase L3 ' of the first-phase L1 ' of power supply, the second-phase L2 ' of power supply and power supply respectively.
Wherein, three groups of main contact KM1 of A.C. contactor KM1 " in one end 3 of 1, the second group of main contact in one end of first group of main contact and one end 5 of the 3rd group of main contact by the first connection terminal XT1 realize respectively with the electrical connection of the third phase L3 ' of the first-phase L1 ' of power supply, the second-phase L2 ' of power supply and power supply.
Three groups of main contact KM1 of A.C. contactor KM1 " in the other end 4 of the other end 2, second group of main contact of first group of main contact and the other end 6 of the 3rd group of main contact be electrically connected with the third phase of the first-phase of motor M, the second-phase of motor M and motor M respectively.
Wherein, three groups of main contact KM1 of A.C. contactor KM1 " in the other end 4 of the other end 2, second group of main contact of first group of main contact and the other end 6 of the 3rd group of main contact by the second connection terminal XT2 realize respectively with the electrical connection of the third phase of the first-phase of motor M, the second-phase of motor M and motor M.
Wherein, the third phase of the first-phase of motor M, the second-phase of motor M and motor M can be respectively: U phase, V phase and W phase.
When Phase sequence detection module PM detects that the phase sequence of power supply connects correctly, press starting switch S1 artificially.After pressing starting switch S1, A.C. contactor KM1 is communicated with the first-phase L1 ' of power supply.The sucking coil energising of A.C. contactor KM1, makes the static iron core of A.C. contactor KM1 produce electromagnetic attraction, will move iron core adhesive.Due to A.C. contactor KM1 contact system (three groups of main contact KM1 ", normally opened contact KM1 ' and auxiliary normally opened contact KM1 " ') with dynamic iron core for link.Therefore, when after dynamic iron core and static iron core adhesive, drive three groups of main contact KM1 of A.C. contactor KM1 " (first group of main contact, second group of main contact and the 3rd group of main contact), normally opened contact KM1 ' and auxiliary normally opened contact KM1 " ' run simultaneously.Three groups of main contact KM1 ", normally opened contact KM1 ' and auxiliary normally opened contact KM1 " ' all closed.Power supply and motor M are connected, and motor M obtains electric operation.And, by the first-phase L1 ' of power supply, the auxiliary normally opened contact KM1 of A.C. contactor KM1 " ', the loop that forms of the first link T2 of the second pilot lamp HL2, temperature limiter, the first K switch 1 and zero line N is close access; the second pilot lamp HL2 is bright, and prompting motor M is in running status.
When motor M runs a period of time; after temperature rises to the protection value of temperature limiter; temperature limiter disconnects automatically; the sucking coil dead electricity of corresponding A.C. contactor KM1; dynamic iron core is separated with static iron core; drive three groups of main contact KM1 of A.C. contactor KM1 ", normally opened contact KM1 ' and auxiliary normally opened contact KM1 " ' all disconnect, motor M and electric power disconnection, motor M is out of service.Now, by the first-phase L1 ' of power supply, the auxiliary normally opened contact KM1 of A.C. contactor KM1 " ', the loop that forms of the first link T2 of the second pilot lamp HL2, temperature limiter, the first K switch 1 and zero line N is open circuit.Therefore, the second pilot lamp HL2 goes out, and prompting motor M is in run-stopping status.
When after motor M a period of time out of service, temperature drops to a certain degree, although now temperature limiter recovers automatically, but because starting switch S1 is knock type switch, this starting switch S1 must be pressed artificially, A.C. contactor KM1 sucking coil just can be made to obtain electric, make three of A.C. contactor KM1 groups of main contact KM1 ", normally open contact KM1 ' and auxiliary normally open contact KM1 " ' close simultaneously, realize the operation again of motor M.Which obviate the automatic startup of the automatic recovery drive motor M of the built-in temperature limiter of motor M, prevent motor M repetition start and stop to affect the phenomenon in its serviceable life, ensure that the accuracy of motor M temperature rise test result.
When motor M occurs the abnormal conditions except the protection value that temperature rises to temperature limiter at run duration, owing to can not motor M be stopped immediately running, make motor M continue in abnormal cases to keep running status, the serviceable life of motor M can be affected equally.Therefore, as the motor detection apparatus of another specific embodiment, also emergency stop switch S2 is comprised.The first end 17 of emergency stop switch S2 is electrically connected with the first-phase L1 ' of power supply, and second end 18 of emergency stop switch S2 is electrically connected with the first end 11 of starting switch S1.
By by between the first-phase L1 ' of emergency stop switch S2 setting and power supply and starting switch S1, first-phase L1 ', the emergency stop switch S2 of power supply and starting switch S1 is namely made to be in series.When abnormal conditions appear in motor M operation, emergency stop switch S2 can be controlled and disconnect, force motor M out of service, the reliability that ensure that the security that motor M is run and detect motor M.Meanwhile, the misoperation avoiding motor M affects the problem in the serviceable life of motor M.
The above embodiment only have expressed several embodiment of the present utility model, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the utility model the scope of the claims.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be as the criterion with claims.
Claims (9)
1. a motor detection apparatus, is characterized in that, comprises Phase sequence detection module and the first pilot lamp;
First wiring point of described Phase sequence detection module connects the first-phase of power supply, second wiring point of described Phase sequence detection module connects the second-phase of described power supply, 3rd wiring point of described Phase sequence detection module connects the third phase of described power supply, connects for the phase sequence detecting described power supply;
The output terminal of described Phase sequence detection module is electrically connected with the first switch, and the phase sequence according to the described power supply detected connects, and controls the closed of described first switch;
One end of described first switch is electrically connected with zero line, and the other end of described first switch is electrically connected with motor;
The first end of described first pilot lamp is electrically connected with the first-phase of described power supply, and the second end of described first pilot lamp is electrically connected with described motor.
2. motor detection apparatus according to claim 1, is characterized in that, described Phase sequence detection module is phase sequence relay.
3. motor detection apparatus according to claim 1, is characterized in that, the inside of described motor is provided with temperature limiter;
The other end of described first switch is electrically connected with the first link of described temperature limiter;
The first-phase of described power supply is electrically connected with the second link of described temperature limiter.
4. motor detection apparatus according to claim 3, is characterized in that, also comprises starting switch;
The first end of described starting switch is electrically connected with the first-phase of described power supply, and the second end of described starting switch is electrically connected with the first contact of A.C. contactor;
Second contact of described A.C. contactor is electrically connected with the second link of described temperature limiter;
Wherein, described starting switch is knock type switch.
5. motor detection apparatus according to claim 4, is characterized in that, also comprises emergency stop switch;
The first end of described emergency stop switch is electrically connected with the first-phase of described power supply, and the second end of described emergency stop switch is electrically connected with the first end of described starting switch.
6. the motor detection apparatus according to claim 4 or 5, is characterized in that, the first end of the normally opened contact of described A.C. contactor is electrically connected with the first end of described starting switch;
Second end of described normally opened contact is electrically connected with the second end of described starting switch.
7. motor detection apparatus according to claim 6, is characterized in that, the first end of the auxiliary normally opened contact of described A.C. contactor is electrically connected with the first-phase of described power supply;
Second end of described auxiliary normally opened contact is electrically connected with one end of the second pilot lamp;
The other end of described second pilot lamp is electrically connected with the first link of described temperature limiter.
8. motor detection apparatus according to claim 7, it is characterized in that, one end of one end of first group of main contact of described A.C. contactor, one end of second group of main contact and the 3rd group of main contact is electrically connected with the third phase of the first-phase of described power supply, the second-phase of described power supply and described power supply respectively;
The other end of described first group of main contact of described A.C. contactor, the other end of described second group of main contact and the other end of described 3rd group of main contact are electrically connected with the third phase of the first-phase of described motor, the second-phase of described motor and described motor respectively.
9. the motor detection apparatus according to any one of claim 3 to 5, is characterized in that, described temperature limiter is thermal protector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420314133.1U CN204028321U (en) | 2014-06-12 | 2014-06-12 | Motor detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420314133.1U CN204028321U (en) | 2014-06-12 | 2014-06-12 | Motor detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204028321U true CN204028321U (en) | 2014-12-17 |
Family
ID=52068163
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420314133.1U Expired - Lifetime CN204028321U (en) | 2014-06-12 | 2014-06-12 | Motor detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204028321U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104076209A (en) * | 2014-06-12 | 2014-10-01 | 珠海格力电器股份有限公司 | Motor detection device |
| CN104865443A (en) * | 2015-05-12 | 2015-08-26 | 株洲南车时代电气股份有限公司 | Automatic measurement system of motor hot resistance and work method thereof |
| CN106207965A (en) * | 2016-09-07 | 2016-12-07 | 合肥三冠包装科技有限公司 | A kind of protection circuit matching servo packer main circuit |
-
2014
- 2014-06-12 CN CN201420314133.1U patent/CN204028321U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104076209A (en) * | 2014-06-12 | 2014-10-01 | 珠海格力电器股份有限公司 | Motor detection device |
| CN104076209B (en) * | 2014-06-12 | 2016-08-17 | 珠海格力电器股份有限公司 | Motor detection device |
| CN104865443A (en) * | 2015-05-12 | 2015-08-26 | 株洲南车时代电气股份有限公司 | Automatic measurement system of motor hot resistance and work method thereof |
| CN104865443B (en) * | 2015-05-12 | 2017-12-26 | 株洲南车时代电气股份有限公司 | The automatic measurement system and its method of work of motor hot resistance |
| CN106207965A (en) * | 2016-09-07 | 2016-12-07 | 合肥三冠包装科技有限公司 | A kind of protection circuit matching servo packer main circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202435320U (en) | Protection circuit of soft starter | |
| CN101994241B (en) | Safety protection circuit and method of door cover of washing machine | |
| CN106771758A (en) | The positioner and method of failure in cabinet control loop | |
| CN204028321U (en) | Motor detection device | |
| CN104283263A (en) | Direct-current charging pile main circuit double-control power supply system and control method thereof | |
| CN103887764B (en) | Have the leakage current detection protection circuit of timer-controlled self-inspection and backing protection function concurrently | |
| CN104076209A (en) | Motor detection device | |
| CN204118813U (en) | Direct-current charging post main circuit dual control electric power system | |
| CN205429890U (en) | It goes up switch FTU controller to adapt to net post that joins in marriage that little power supply circuit reclosed | |
| CN208723536U (en) | A kind of electromotor integrated protection system for extractive equipment | |
| CN203513016U (en) | Power supply open-phase protection device of lift control cabinet | |
| CN103762557A (en) | Device and method for open-circuit-resistant protection of current transformer | |
| CN103383405B (en) | A kind of passive signal voltage detection method | |
| CN101885440A (en) | Method and device for saving energy of elevator | |
| CN104237782A (en) | Starting relay durability system with safety protection and fault reminding functions and test method | |
| CN102832798B (en) | One powers on buffer control circuit and control method thereof | |
| CN202734255U (en) | Electric heating function control device for heat-pump water heater | |
| CN104022492A (en) | Auxiliary short circuit protection device for low-voltage power supply device of long-distance mine laneway | |
| CN204166079U (en) | Secondary loop of breaker wiring testing device | |
| CN204835513U (en) | Voltage type arc light protection device | |
| CN203607351U (en) | A low-voltage circuit breaker automatic closing apparatus | |
| CN204101696U (en) | With the starter relay durable systems of safeguard protection and fault cues | |
| CN103574907A (en) | Electric heating function control device for heat-pump water heater and control method of electric heating function control device | |
| CN203504465U (en) | Continuous caster tension leveler excitation power supply | |
| CN203849611U (en) | Power supply cabinet for train |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20141217 Effective date of abandoning: 20160817 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |