CN203133226U - Polarity testing instrument for current transformer - Google Patents

Polarity testing instrument for current transformer Download PDF

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Publication number
CN203133226U
CN203133226U CN 201320163236 CN201320163236U CN203133226U CN 203133226 U CN203133226 U CN 203133226U CN 201320163236 CN201320163236 CN 201320163236 CN 201320163236 U CN201320163236 U CN 201320163236U CN 203133226 U CN203133226 U CN 203133226U
Authority
CN
China
Prior art keywords
current
current transformer
polarity
mutual inductor
tested
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.)
Active
Application number
CN 201320163236
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Chinese (zh)
Inventor
刘杰
杨辉
季云杰
王鑫峰
杨雪莹
郭凯
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
State Grid Corp of China SGCC
Tianjin Electric Power Corp
Original Assignee
State Grid Corp of China SGCC
Tianjin Electric Power Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by State Grid Corp of China SGCC, Tianjin Electric Power Corp filed Critical State Grid Corp of China SGCC
Priority to CN 201320163236 priority Critical patent/CN203133226U/en
Application granted granted Critical
Publication of CN203133226U publication Critical patent/CN203133226U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model discloses a polarity testing instrument for a current transformer, which comprises a simulated current generating unit and a mutual inductor polarity determination unit. The simulated current generating unit is connected with current input ends at a primary side of the current transformer to be tested. The mutual inductor polarity determination unit is connected with a current output end at a secondary side of the current transformer to be tested. The mutual inductor polarity determination unit determines secondary output current polarity of the current transformer to be tested. The polarity testing instrument for the current transformer has the following beneficial effects: small overall size, high portability, simple operation, and high operation reliability. Tedious operation in the prior-art similar device is changed. Previously, only single phase of the current transformer can be tested, and now three phases of the current transformer can be simultaneously tested. The workload in wire reversing and wire connection is reduced for about 70%. The operation time is shortened for 50%, and the operation efficiency is greatly improved. A pointer type universal meter is replaced by a DC meter head, thereby reducing cost and simultaneously reducing maintenance cost.

Description

Current transformer loop polarity tester
Technical field
The utility model relates to a kind of power industry pick-up unit; The tester that particularly relates to a kind of Current Transformer Secondary side loop polarity.
Background technology
Existing measurement Current Transformer Secondary side loop polarity is to be used by pointer multimeter and direct current first kind battery, there is not special-purpose detecting instrument, detection means is single, particularly can only carry out single-phase test during operation, the battery contact will be touched insecure artificially, and when workload was big, the workload of multimeter line falling, wiring was very big, and easy misconnection, work efficiency is lower.
Summary of the invention
Technical problem to be solved in the utility model is, provide a kind of can be to tester single-phase or threephase current transformer secondary circuit polarity measurement.
The technical scheme that the utility model adopts is: a kind of current transformer loop polarity tester comprises analog current generation unit and mutual inductor polarity identifying unit; Described analog current generation unit is connected with A, B, the C three-phase current input end of threephase current transformer primary side to be measured respectively; Described mutual inductor polarity identifying unit is connected with A, B, the C three-phase current output terminal of Current Transformer Secondary side to be measured respectively, and described mutual inductor polarity identifying unit detects the secondary output current polarity of threephase current transformer to be measured.
Described analog current generation unit comprises, battery, total power switch, conducting button and connection terminal; The positive pole of described battery is connected with an end of total power switch, and the other end of total power switch is connected with the conducting button; One end of conducting button is connected with connection terminal one end, and the connection terminal other end is connected with battery cathode; Described mutual inductor polarity identifying unit comprises, three DC current gauge outfits, three-phase binding post and three toggle switchs; Described three DC current gauge outfits are connected in series respectively with every phase secondary current output terminal, three-phase binding post and three toggle switchs of current transformer to be measured respectively.
The beneficial effects of the utility model are that this testing tool integral body is little, portable, and is simple to operate, reliable operation, it is loaded down with trivial details to have changed original operation, in the past, can only test the single-phase current mutual inductor during detection, now threephase current transformer can be tested simultaneously, and it is nearly 70% to have reduced line falling, wiring workload, shortens working hours 50%, increase substantially work efficiency, replace pointer multimeter by the DC current gauge outfit, reduced cost, maintenance cost also reduces simultaneously.
Description of drawings
Fig. 1 is the wiring diagram of the utility model current transformer loop polarity tester;
Fig. 2 is the fundamental diagram of the utility model current transformer loop polarity test.
Among the figure:
1. connection terminal 2. conducting buttons 3. total power switch 4. batteries
5. toggle switch 6. DC current gauge outfits 7. binding posts.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail:
Extremely shown in Figure 2 as Fig. 1, the utility model current transformer loop polarity tester, the secondary output current polarity of detection threephase current transformer comprises analog current generation unit 10 and mutual inductor polarity identifying unit 20; Described analog current generation unit 10 is connected with A, B, the C three-phase current input end of threephase current transformer primary side to be measured respectively; Described mutual inductor polarity identifying unit 20 is connected with A, B, the C three-phase current output terminal of Current Transformer Secondary side to be measured respectively, and described mutual inductor polarity identifying unit 20 detects the secondary output current polarity of threephase current transformer to be measured.Described analog current generation unit 10 comprises, battery 4, total power switch 3, conducting button 2 and connection terminal 1; The positive pole of described battery 4 is connected with an end of total power switch 3, and the other end of total power switch 3 is connected with conducting button 2; One end of conducting button 2 is connected with connection terminal 1 one ends, and connection terminal 1 other end is connected with battery 4 negative poles; Described mutual inductor polarity identifying unit 20 comprises, three DC current gauge outfits 6, three-phase binding post 7 and three toggle switchs 5; Described three DC current gauge outfits 6 are connected in series respectively with every phase secondary current output terminal, three-phase binding post 7 and three toggle switchs 5 of current transformer to be measured respectively.
The principle of work of this tester is: with the separate respectively wiring of Current Transformer Secondary terminal in mutual inductor polarity identifying unit and the switch cubicle cell according to corresponding alternating current, the analog current generation unit is connected according to separate with the current transformer primary side, need during detection to cooperate simultaneously, when pressing analog current generation unit conducting button, just simulate the process that primary current flows into current transformer to be measured, simultaneously, the DC current meter pointer of mutual inductor polarity identifying unit is swung, the process of Current Transformer Secondary side output current just, the positive-negative polarity of the direction determining Current Transformer Secondary side to be measured by the swing of DC current meter pointer.
This testing tool integral body is little, portable, simple to operate, reliable operation, it is loaded down with trivial details to have changed original operation, in the past, and during detection, can only test the single-phase current mutual inductor, now, every phase of threephase current transformer can be tested simultaneously, has reduced line falling, wiring workload nearly 70%, shorten working hours 50%, increase substantially work efficiency, in the past, every price of pointer multimeter was about 300 yuan, every DC current gauge outfit price is at 30 yuan now, replace pointer multimeter by the DC current gauge outfit, reduced cost, maintenance cost also reduces by 90% simultaneously.
It is worthy of note that protection scope of the present invention is not limited to above-mentioned instantiation mode, according to basic fundamental design of the present invention, also can detect the secondary output current polarity of single-phase current mutual inductor; As long as those of ordinary skills need not through creative work, the embodiment that can associate all belongs to protection scope of the present invention.

Claims (2)

1. a current transformer loop polarity tester is characterized in that, comprises analog current generation unit (10) and mutual inductor polarity identifying unit (20); Described analog current generation unit (10) is connected with A, B, the C three-phase current input end of threephase current transformer primary side to be measured respectively; Described mutual inductor polarity identifying unit (20) is connected with A, B, the C three-phase current output terminal of Current Transformer Secondary side to be measured respectively, and described mutual inductor polarity identifying unit (20) detects the secondary output current polarity of threephase current transformer to be measured.
2. current transformer loop polarity tester according to claim 1 is characterized in that, described analog current generation unit comprises, battery (4), total power switch (3), conducting button (2) and connection terminal (1); The positive pole of described battery (4) is connected with an end of total power switch (3), and the other end of total power switch (3) is connected with conducting button (2); One end of conducting button (2) is connected with connection terminal (1) one end, and connection terminal (1) other end is connected with battery (4) negative pole; Described mutual inductor polarity identifying unit comprises, three DC current gauge outfits (6), three-phase binding post (7) and three toggle switchs (5); Described three DC current gauge outfits (6) are connected in series respectively with every phase secondary current output terminal, three-phase binding post (7) and three toggle switchs (5) of current transformer to be measured respectively.
CN 201320163236 2013-04-03 2013-04-03 Polarity testing instrument for current transformer Active CN203133226U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201320163236 CN203133226U (en) 2013-04-03 2013-04-03 Polarity testing instrument for current transformer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201320163236 CN203133226U (en) 2013-04-03 2013-04-03 Polarity testing instrument for current transformer

Publications (1)

Publication Number Publication Date
CN203133226U true CN203133226U (en) 2013-08-14

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN 201320163236 Active CN203133226U (en) 2013-04-03 2013-04-03 Polarity testing instrument for current transformer

Country Status (1)

Country Link
CN (1) CN203133226U (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103454554A (en) * 2013-08-30 2013-12-18 广东威恒输变电工程有限公司 Current transformer polarity tester
CN105527538A (en) * 2014-09-30 2016-04-27 国家电网公司 Polarity test device of current transformer
CN106124922A (en) * 2016-06-07 2016-11-16 国网山东省电力公司经济技术研究院 A kind of three-phase adjustable polarity test table
CN107817419A (en) * 2017-06-23 2018-03-20 国网新疆电力公司经济技术研究院 Portable three-phase polarity tester

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103454554A (en) * 2013-08-30 2013-12-18 广东威恒输变电工程有限公司 Current transformer polarity tester
CN103454554B (en) * 2013-08-30 2017-04-12 广东威恒输变电工程有限公司 Current transformer polarity tester
CN105527538A (en) * 2014-09-30 2016-04-27 国家电网公司 Polarity test device of current transformer
CN106124922A (en) * 2016-06-07 2016-11-16 国网山东省电力公司经济技术研究院 A kind of three-phase adjustable polarity test table
CN107817419A (en) * 2017-06-23 2018-03-20 国网新疆电力公司经济技术研究院 Portable three-phase polarity tester

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