CN201852924U - Polarity relationship inspecting device for differential protection current of electric motor - Google Patents
Polarity relationship inspecting device for differential protection current of electric motor Download PDFInfo
- Publication number
- CN201852924U CN201852924U CN2010205841706U CN201020584170U CN201852924U CN 201852924 U CN201852924 U CN 201852924U CN 2010205841706 U CN2010205841706 U CN 2010205841706U CN 201020584170 U CN201020584170 U CN 201020584170U CN 201852924 U CN201852924 U CN 201852924U
- Authority
- CN
- China
- Prior art keywords
- input end
- wiring terminal
- connection terminal
- electric motor
- differential protection
- 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
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Abstract
The utility model provides a polarity relationship inspecting device for the differential protection current of an electric motor. Two ends of a current transformer at the front end of the electric motor are respectively connected with input ends of a wiring terminal A and a wiring terminal B; the output end of the wiring terminal A is connected with the input end of an ammeter A1; the output end of the wiring terminal B is connected with the input end of an ammeter A2; two ends of the current transformer at the rear end of the electric motor are respectively connected with input ends of a wiring terminal C and a wiring terminal D; the output end of the wiring terminal C is connected with the input end of the ammeter A2; the output end of the wiring terminal D is connected with the input end of an ammeter A3; and the output ends of the ammeters A1, A2 and A3 are connected. The device adopts simple structure, is convenient to use in field debugging, is concise and saves manpower and the using quantity of instruments.
Description
Technical field:
The utility model belongs to a kind of motor checkout facility, and particularly a kind of motor differential protection current polarity concerns testing fixture.
Background technology:
Large-scale AC motor is widely used in the visual plant of departments such as mining, oil, chemical industry, refrigeration, power and metallurgy; the startup operation debugging of high capacity motor is very important; be related to the normal operation production of equipment; therefore need carry out differential protection to motor, and the current polarity of motor differential protection relation is the key of motor differential protection debugging.The present required metered quantity of inspection that the current polarity of motor differential protection is concerned is many, debug time long, efficient is lower.
Summary of the invention:
The purpose of this utility model just is to overcome above-mentioned the deficiencies in the prior art, and provides a kind of motor differential protection current polarity to concern testing fixture, and this device is easy to use in debugging at the scene, succinctly saves the usage quantity of manpower and instrument.
As above design, the technical solution of the utility model is: a kind of motor differential protection current polarity concerns testing fixture, it is characterized in that: the current transformer two ends that are positioned at the motor front end are connected with the input end of connection terminal B with connection terminal A respectively, the output terminal of connection terminal A is connected with the input end of reometer A1, and the output terminal of connection terminal B is connected with the input end of reometer A2; The current transformer two ends that are positioned at motor rear end are connected with the input end of connection terminal D with connection terminal C respectively, and the output terminal of connection terminal C is connected with the input end of reometer A2, and the output terminal of connection terminal D is connected with the input end of reometer A3; The output terminal of reometer A1, A2 and A3 links to each other.
The utility model is simple in structure, and is easy to use in the debugging at the scene, succinctly saves the usage quantity of manpower and instrument.
Description of drawings:
Fig. 1 is a synoptic diagram of the present utility model.
Embodiment:
As shown in the figure: a kind of motor differential protection current polarity concerns testing fixture, the current transformer two ends that are positioned at the motor front end are connected with the input end of connection terminal B with connection terminal A respectively, the output terminal of connection terminal A is connected with the input end of reometer A1, and the output terminal of connection terminal B is connected with the input end of reometer A2; The current transformer two ends that are positioned at motor rear end are connected with the input end of connection terminal D with connection terminal C respectively, and the output terminal of connection terminal C is connected with the input end of reometer A2, and the output terminal of connection terminal D is connected with the input end of reometer A3; The output terminal of reometer A1, A2 and A3 links to each other.
Current value shown in reometer A1 and the A3 equates when two ends mutual inductor secondary connection polar relationship is correct, and current value shown in the reometer A2 is zero.Otherwise, only need switch any side secondary wiring of current mutual inductor and get final product.
Claims (1)
1. a motor differential protection current polarity concerns testing fixture, it is characterized in that: the current transformer two ends that are positioned at the motor front end are connected with the input end of connection terminal B with connection terminal A respectively, the output terminal of connection terminal A is connected with the input end of reometer A1, and the output terminal of connection terminal B is connected with the input end of reometer A2; The current transformer two ends that are positioned at motor rear end are connected with the input end of connection terminal D with connection terminal C respectively, and the output terminal of connection terminal C is connected with the input end of reometer A2, and the output terminal of connection terminal D is connected with the input end of reometer A3; The output terminal of reometer A1, A2 and A3 links to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205841706U CN201852924U (en) | 2010-10-29 | 2010-10-29 | Polarity relationship inspecting device for differential protection current of electric motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205841706U CN201852924U (en) | 2010-10-29 | 2010-10-29 | Polarity relationship inspecting device for differential protection current of electric motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201852924U true CN201852924U (en) | 2011-06-01 |
Family
ID=44095312
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205841706U Expired - Lifetime CN201852924U (en) | 2010-10-29 | 2010-10-29 | Polarity relationship inspecting device for differential protection current of electric motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201852924U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107478943A (en) * | 2017-08-09 | 2017-12-15 | 大唐东北电力试验研究所有限公司 | Detect the method and device of differential protection for generator polarity |
| CN110221165A (en) * | 2019-06-11 | 2019-09-10 | 安徽马钢设备检修有限公司 | A kind of motor differential protection test new method |
| CN110554297A (en) * | 2018-06-04 | 2019-12-10 | 中冶天工集团有限公司 | method for checking differential protection current loop of large high-voltage motor by using low-voltage electricity |
-
2010
- 2010-10-29 CN CN2010205841706U patent/CN201852924U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107478943A (en) * | 2017-08-09 | 2017-12-15 | 大唐东北电力试验研究所有限公司 | Detect the method and device of differential protection for generator polarity |
| CN110554297A (en) * | 2018-06-04 | 2019-12-10 | 中冶天工集团有限公司 | method for checking differential protection current loop of large high-voltage motor by using low-voltage electricity |
| CN110221165A (en) * | 2019-06-11 | 2019-09-10 | 安徽马钢设备检修有限公司 | A kind of motor differential protection test new method |
| CN110221165B (en) * | 2019-06-11 | 2021-03-26 | 安徽马钢设备检修有限公司 | Novel motor differential protection test method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110601 |