CN203479847U - Wire clamp for testing DC resistance of transformer or loop resistance of circuit breaker - Google Patents
Wire clamp for testing DC resistance of transformer or loop resistance of circuit breaker Download PDFInfo
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- CN203479847U CN203479847U CN201320613501.8U CN201320613501U CN203479847U CN 203479847 U CN203479847 U CN 203479847U CN 201320613501 U CN201320613501 U CN 201320613501U CN 203479847 U CN203479847 U CN 203479847U
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- wire clamp
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- resistance
- chuck
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Abstract
The utility model discloses a wire clamp for testing DC resistance of a transformer or loop resistance of a circuit breaker, which comprises an insulating wire clamp body and a clamp head. The insulating wire clamp body is pliers-shaped integrally and is composed of a plier mouth, a plier cheek and a handle. The clamp head is fixedly arranged at the plier mouth. The clamp head comprises two parts which are symmetrical in a left-and-right direction. Each part is composed of a first board and a second board which are connected together according to an included angle of 90-140 DEG. The inside part of the first board is zigzag. The wall surface below the plier nozzle is provided with a through hole. The first board is fixedly arranged on the inner wall of a corresponding side of the plier mouth. The second board penetrates through the through hole from inside part of the plier mouth. The wire clamp provided by the utility model has the following functions: improving test data accuracy, shortening test time and reducing error determination rate.
Description
Technical field
The utility model belongs to electric testing instrument auxiliary device, particularly a kind of for testing the wire clamp of DC Resistance of Transformer or isolating switch loop resistance.
Background technology
In power equipment operational process, the contact of isolating switch galvanic circle is well the essential condition that guarantees isolating switch performance, and galvanic circle resistance increases will make contact seriously generate heat, thereby causes spring annealing, contact insulating part scaling loss around.Due to Contact Resistance of Circuit Breaker numerical value less (μ Ω rank), if measure wire clamp and contact of breaker loose contact, can make measuring result error larger, affect testing crew judgment device situation.
DC Resistance of Transformer test is a pilot project not only easy but also important in transformer test.Well whether test Transformer Winding can check out winding inner lead joint welding quality, lead-in wire together with the direct current resistance of sleeve pipe and welding quality, each tap position of voltage tap switch and the lead-in wire of winding joint and the contact of sleeve pipe, correctly whether parallel branch to be connected, transformer current carrying part has or not and opens circuit, loose contact and winding have or not breaking phenomena.
Find that at work existing isolating switch circuit resistance tester wire clamp and direct-current resistance tester for transformer wire clamp exist following shortcoming:
Existing isolating switch loop-around test instrument is measured wire clamp and is subject to shape and big or small restriction, when VS1 (ZN63) type isolating switch is carried out to loop resistance test, its wire clamp can only be clipped on moving contact of breaker, cannot guarantee that contact is good, need repeatedly adjust wire clamp position, sometimes also need to open insulating sheath upper cover, wire clamp is clipped on wire and is measured; The VD4 type vacuum circuit breaker of producing for Xiamen ABB, insulating sheath is hermetically sealed form, wire clamp cannot be clipped on wire, can only repeatedly adjust moving contact and wire clamp position is measured.Above-mentioned situation extends test period, affects test figure Stability and veracity.
And measure wire clamp due to aperture and thickness limits for direct-current resistance tester for transformer, and cannot directly be clipped on transformer extension line cable end, can only be clipped in terminal block to measure, because various external factor cause test figure inaccurate.
Summary of the invention
In order to solve the problems of the technologies described above, the utility model provides a kind of DC Resistance of Transformer, isolating switch loop resistance test clamp, can improve accuracy, the shortening test period of test figure, reduces False Rate.
For this reason, the technical solution of the utility model is as follows:
A kind of for testing the wire clamp of DC Resistance of Transformer, isolating switch loop resistance, comprise insulating clamp body and chuck, described insulating clamp body is pliers shape on the whole, by jaw, the pincers cheek and handle, formed, described chuck is packed in described jaw place, described chuck comprises symmetrical two parts, and every part forms by being 90 °～140 ° the 1st plates that link together and the 2nd plate, and described the 1st plate inner side is zigzag; On the wall of described jaw bottom, be formed with through hole, described the 1st plate is packed on the inwall of jaw respective side, and described the 2nd plate passes described through hole from jaw inner side.
Described chuck is superimposed and is formed by the identical thin slice of a plurality of shapes, and described the 2nd plate is all formed with for fixing aperture away from one end of the 1st plate.
The 1st plate of described chuck is divided into three sections, and first paragraph is straight plate, and second segment is circular arc plate, and the 3rd section is straight plate.
The second segment of described the 1st plate and the 3rd section are placed in the groove of insulating clamp body portion inner side, and first paragraph has at least 2/3 length to stretch out groove.
The 1st plate of described chuck is divided into five sections, by first paragraph after forward direction, is straight plate, and second segment is circular arc plate, and the 3rd section is straight plate, and the 4th section is circular arc plate, and the 5th section is straight plate.
The 3rd section, the 4th section and the 5th section of described the 1st plate is placed in the groove of insulating clamp body portion inner side, and first paragraph and second segment stretch out groove.
The chuck inner side of this wire clamp is zigzag, can guarantee keying strength, prevents that in process of the test, chuck gets loose, and enlarge active surface, improves test figure accuracy simultaneously.Split-type structural can be assembled according to the structure of equipment under test this wire clamp, and this wire clamp is easy for installation, not fragile, safe and reliable; And the stack of chuck employing multi-disc metal, can guarantee, when running into difform gripping object, to produce the deformation of zone of reasonableness under the condition that meets test data accuracy the surface of contact of try one's best increase and gripping object, thereby the accuracy of raising test data.
Accompanying drawing explanation
Fig. 1 is the structural representation of embodiment 1,2;
Fig. 2 is the profile cut-open view of embodiment 1,2;
Fig. 3 is the structural representation of embodiment 3;
Fig. 4 is the profile cut-open view of embodiment 3.
Embodiment
Below in conjunction with the drawings and specific embodiments, structure of the present utility model is described.
A kind of for testing the wire clamp of DC Resistance of Transformer, isolating switch loop resistance, comprise insulating clamp body 2 and chuck 1, described insulating clamp body 2 is pliers shape on the whole, by jaw, the pincers cheek and handle, formed, described chuck 1 is packed in described jaw place, described chuck 1 comprises symmetrical two parts, and every part forms by being 90 °～140 ° the 1st plates that link together and the 2nd plate, and described the 1st plate inner side is zigzag; On the wall of described jaw bottom, be formed with through hole, described the 1st plate is packed on the inwall of jaw respective side, and described the 2nd plate passes described through hole from jaw inner side.
The 1st plate of described chuck is divided into three sections, and first paragraph is straight plate 11, and second segment is that 12, the three sections of circular arc plates are straight plate 16.
The second segment 12 of described the 1st plate and the 3rd section 16 are placed in the groove of insulating clamp body 2 anterior inner sides, and first paragraph 11 has at least 2/3 length to stretch out groove.
Chuck inner side is zigzag, can guarantee keying strength, prevents that in process of the test, chuck gets loose, and enlarge active surface, improves test figure accuracy simultaneously.
Split-type structural can be assembled according to the structure of equipment under test this wire clamp, and this wire clamp is easy for installation, not fragile, safe and reliable.
Be with the difference of embodiment 1: described chuck 1 is superimposed and is formed by the identical thin slice of a plurality of shapes, described the 2nd plate 13 is all formed with for fixing aperture 15 away from one end of the 1st plate.
Chuck adopts the stack of multi-disc metal, can guarantee, when running into difform gripping object, to produce the deformation of zone of reasonableness under the condition that meets test data accuracy, the surface of contact of try one's best increase and gripping object, thus improve test data accuracy.
Being with the difference of embodiment 2: the 1st plate of described chuck 1 is divided into five sections, is straight plate 11 by first paragraph after forward direction, and second segment is that 12, the three sections of circular arc plates are that 16, the four sections of straight plates are that 17, the five sections of circular arc plates are straight plate 18.
The 3rd section 16, the 4th sections 17 and the 5th sections 18 of described the 1st plate are placed in the groove of insulating clamp body 2 anterior inner sides, and first paragraph 11 and second segment 12 stretch out groove.
Chuck is elongated, dehisce to make greatly this wire clamp be applicable to the situation that the test space is narrow or contact diameter is larger.
Claims (6)
1. one kind for testing the wire clamp of DC Resistance of Transformer, isolating switch loop resistance, comprise insulating clamp body (2) and chuck (1), described insulating clamp body (2) is pliers shape on the whole, by jaw, the pincers cheek and handle, formed, described chuck (1) is packed in described jaw place, it is characterized in that: described chuck (1) comprises symmetrical two parts, every part forms by being 90 °～140 ° the 1st plates that link together and the 2nd plate, and described the 1st plate inner side is zigzag; On the wall of described jaw bottom, be formed with through hole, described the 1st plate is packed on the inwall of jaw respective side, and described the 2nd plate passes described through hole from jaw inner side.
2. wire clamp as claimed in claim 1, is characterized in that: described chuck (1) is superimposed and is formed by the identical thin slice of a plurality of shapes, and described the 2nd plate (13) is all formed with for fixing aperture (15) away from one end of the 1st plate.
3. wire clamp as claimed in claim 1, is characterized in that: the 1st plate of described chuck is divided into three sections, and first paragraph is straight plate (11), and second segment is circular arc plate (12), and the 3rd section is straight plate (16).
4. wire clamp as claimed in claim 3, is characterized in that: the second segment of described the 1st plate (12) and the 3rd section (16) are placed in the groove of the anterior inner side of insulating clamp body (2), and first paragraph (11) has at least 2/3 length to stretch out groove.
5. wire clamp as claimed in claim 1, is characterized in that: the 1st plate of described chuck (1) is divided into five sections, by first paragraph after forward direction, is straight plate (11), second segment is circular arc plate (12), the 3rd section is straight plate (16), and the 4th section is circular arc plate (17), and the 5th section is straight plate (18).
6. wire clamp as claimed in claim 5, it is characterized in that: the 3rd section (16) of described the 1st plate, the 4th section (17) and the 5th section (18) are placed in the groove of the anterior inner side of insulating clamp body (2), and first paragraph (11) and second segment (12) stretch out groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320613501.8U CN203479847U (en) | 2013-09-30 | 2013-09-30 | Wire clamp for testing DC resistance of transformer or loop resistance of circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320613501.8U CN203479847U (en) | 2013-09-30 | 2013-09-30 | Wire clamp for testing DC resistance of transformer or loop resistance of circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203479847U true CN203479847U (en) | 2014-03-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320613501.8U Expired - Lifetime CN203479847U (en) | 2013-09-30 | 2013-09-30 | Wire clamp for testing DC resistance of transformer or loop resistance of circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203479847U (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103840386A (en) * | 2014-03-28 | 2014-06-04 | 国网上海市电力公司 | Wire connector wire device used for breaker switch contact |
| CN104076208A (en) * | 2014-07-18 | 2014-10-01 | 国家电网公司 | Transformer direct current resistance testing method and testing clamp with adjustable opening |
| CN105866479A (en) * | 2016-05-25 | 2016-08-17 | 黑龙江省电力有限公司牡丹江水力发电总厂 | Special clamp for test on low pressure side of main transformer |
| CN105954545A (en) * | 2016-05-30 | 2016-09-21 | 国网河北省电力公司电力科学研究院 | Transformer dielectric loss test wiring device |
| CN106324398A (en) * | 2016-08-23 | 2017-01-11 | 国家电网公司 | Transformer short-circuit grounding testing device |
| CN107271736A (en) * | 2017-08-01 | 2017-10-20 | 国家电网公司 | A kind of special short seal apparatus of transformer test |
| CN107622886A (en) * | 2017-10-19 | 2018-01-23 | 国网辽宁省电力有限公司铁岭供电公司 | The convenient conversion equipment of dry-type transformer shunting switch |
| CN109167231A (en) * | 2018-10-26 | 2019-01-08 | 广州供电局有限公司 | Multifunctional comprehensive jointing clamp |
| CN110398683A (en) * | 2019-06-06 | 2019-11-01 | 国网山东省电力公司高青县供电公司 | A kind of improvement type handcart type breaker loop resistance test clip |
| CN111239443A (en) * | 2020-02-24 | 2020-06-05 | 国网天津市电力公司电力科学研究院 | Clamp for detecting direct current resistance of distribution network cable |
-
2013
- 2013-09-30 CN CN201320613501.8U patent/CN203479847U/en not_active Expired - Lifetime
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103840386B (en) * | 2014-03-28 | 2016-08-17 | 国网上海市电力公司 | A kind of lug wire installation for killer switch contact |
| CN103840386A (en) * | 2014-03-28 | 2014-06-04 | 国网上海市电力公司 | Wire connector wire device used for breaker switch contact |
| CN104076208A (en) * | 2014-07-18 | 2014-10-01 | 国家电网公司 | Transformer direct current resistance testing method and testing clamp with adjustable opening |
| CN105866479A (en) * | 2016-05-25 | 2016-08-17 | 黑龙江省电力有限公司牡丹江水力发电总厂 | Special clamp for test on low pressure side of main transformer |
| CN105954545B (en) * | 2016-05-30 | 2018-03-02 | 国网河北省电力公司电力科学研究院 | A kind of Dielectric Test of Transformer termination |
| CN105954545A (en) * | 2016-05-30 | 2016-09-21 | 国网河北省电力公司电力科学研究院 | Transformer dielectric loss test wiring device |
| CN106324398A (en) * | 2016-08-23 | 2017-01-11 | 国家电网公司 | Transformer short-circuit grounding testing device |
| CN107271736A (en) * | 2017-08-01 | 2017-10-20 | 国家电网公司 | A kind of special short seal apparatus of transformer test |
| CN107271736B (en) * | 2017-08-01 | 2019-11-19 | 国家电网公司 | A kind of dedicated short seal apparatus of transformer test |
| CN107622886A (en) * | 2017-10-19 | 2018-01-23 | 国网辽宁省电力有限公司铁岭供电公司 | The convenient conversion equipment of dry-type transformer shunting switch |
| CN109167231A (en) * | 2018-10-26 | 2019-01-08 | 广州供电局有限公司 | Multifunctional comprehensive jointing clamp |
| CN110398683A (en) * | 2019-06-06 | 2019-11-01 | 国网山东省电力公司高青县供电公司 | A kind of improvement type handcart type breaker loop resistance test clip |
| CN111239443A (en) * | 2020-02-24 | 2020-06-05 | 国网天津市电力公司电力科学研究院 | Clamp for detecting direct current resistance of distribution network cable |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140312 |