CN106990377B - 10kV switch cabinet current transformer test fixture - Google Patents
10kV switch cabinet current transformer test fixture Download PDFInfo
- Publication number
- CN106990377B CN106990377B CN201710337397.7A CN201710337397A CN106990377B CN 106990377 B CN106990377 B CN 106990377B CN 201710337397 A CN201710337397 A CN 201710337397A CN 106990377 B CN106990377 B CN 106990377B
- Authority
- CN
- China
- Prior art keywords
- current transformer
- crank arm
- contact
- arm
- test fixture
- 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.)
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Links
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052802 copper Inorganic materials 0.000 claims abstract description 6
- 239000010949 copper Substances 0.000 claims abstract description 6
- 229920001342 Bakelite® Polymers 0.000 claims abstract description 4
- 239000004637 bakelite Substances 0.000 claims abstract description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/02—Testing or calibrating of apparatus covered by the other groups of this subclass of auxiliary devices, e.g. of instrument transformers according to prescribed transformation ratio, phase angle, or wattage rating
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
Abstract
The invention relates to a 10kV switch cabinet current transformer test fixture which comprises a crank arm, wherein a double-arm wire clamp is fixed at the front end of the crank arm, a contact is arranged at the head of the wire clamp and is connected with a test cable, and a screw handle is arranged at the rear end of the crank arm. The test fixture for the 10kV switch cabinet current transformer adopts an inverted U-shaped structure, and the inverted U-shaped crank arm is integrally formed by bakelite with good insulativity and easy processing, so that the test fixture has certain mechanical strength and insulating property. The front end of the crank arm is provided with a rotatable double-arm wire clamp which can clamp two primary wiring terminals of the current transformer at the same time, so that the test wiring times are reduced. The fastener is copper multirow contact, and one end is fixed on the loose axle, and the other end uses the spring to support, has both increased the area of contact with current transformer once wiring board, makes its contact good to guarantee the heavy current and pass through, can increase the tightness of fastener again, can reliably fix, prevent to drop.
Description
Technical Field
The invention relates to a 10kV switch cabinet current transformer test fixture.
Background
With the wide application of 10kV switch cabinets in national grid power systems and large-scale enterprise substations, the test tasks of 10kV current transformers are increasingly increased, and the traditional test method has the problems of difficult operation, low efficiency and the like. So how to improve the test efficiency and test safety of the 10kV current transformer is an urgent problem to be solved. The traditional test comprises the following steps: 1. the experimenter stretches hands into the cabinet body to detect the position of the primary screw; 2. extending the wire clamp into the cabinet body according to the ascertained position to carry out blind clamping; 3. after the pile head screw is clamped by the wire clamp, the clamp is rocked to determine whether the pile head screw is clamped, and if the wire clamp fails, the operation is repeated. The inside space of cabinet body is narrow, can only allow the arm to stretch into, and the screw is in visual field blind area, leads to press from both sides line operation difficulty, and the fastener easily drops, has the potential safety hazard. And because the pile head screw is exposed shorter and the contact surface is small, the test fails due to the large contact resistance and difficult current rising when the high-current test is performed, and the wire clamping operation is required to be repeated, so that the test efficiency is reduced. It can be seen that the limitation of the structure and operation of the conventional clamp is a main reason for low test efficiency, and a novel clamp needs to be developed to replace the conventional clamp, so that the test efficiency is improved.
Disclosure of Invention
The invention aims to solve the technical problem of providing a 10kV switch cabinet current transformer test fixture, which adopts a U-shaped structure, belongs to a universal fixture, and can be used for tests of transformation ratio, polarity, volt-ampere characteristics and the like of the current transformer and can also be used for current transformer current rise tests.
In order to solve the problems existing in the prior art, the invention adopts the following technical scheme:
the utility model provides a 10kV cubical switchboard current transformer test fixture, includes the turning arm, and a double-arm fastener is fixed to the turning arm front end, and the fastener head is provided with the contact, and the contact is connected test cable, turning arm rear end installation screw rod handle.
The front end of the crank arm is connected with the double-arm wire clamp through a bolt.
The crank arm is of an inverted U shape.
The crank arm is made of bakelite.
The double-arm wire clamp is rotatable.
The contacts are multiple rows of contacts, one end of each contact is fixed on the movable shaft, and the other end of each contact is supported by a spring.
The contact is copper.
The bottom of the screw rod is additionally provided with an insulating pad.
The invention has the advantages and effects that:
the test fixture for the 10kV switch cabinet current transformer adopts an inverted U-shaped structure, and the inverted U-shaped crank arm is integrally formed by bakelite with good insulativity and easy processing, so that the test fixture has certain mechanical strength and insulating property. The front end of the crank arm is provided with a rotatable double-arm wire clamp which can clamp two primary wiring terminals of the current transformer at the same time, so that the test wiring times are reduced. The fastener is copper multirow contact, and one end is fixed on the loose axle, and the other end uses the spring to support, has both increased the area of contact with current transformer once wiring board, makes its contact good to guarantee the heavy current and pass through, can increase the tightness of fastener again, can reliably fix, prevent to drop. The screw handle is additionally arranged at the rear end of the crank arm, the insulating pad is additionally arranged at the bottom of the crank arm, and friction force is increased. The invention belongs to a universal clamp, which can be used for tests of transformation ratio, polarity, volt-ampere characteristics and the like of a current transformer and can also be used for current transformer current rise tests. The clamp does not need an operator to enter the switch cabinet, is convenient to use, can greatly improve the test efficiency of the current transformer, saves test time, reduces the workload of the tester, and ensures personal safety. The fixture has the characteristics of high safety coefficient, low working strength, high working efficiency and labor intensity reduction in the wire clamping process, can be disassembled and assembled simply and conveniently, greatly reduces the disassembly and assembly time of the fixture, can effectively improve the test efficiency of the 10kV switch cabinet current transformer, improves the quality of overhaul and maintenance work, and ensures the power supply reliability.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a 10kV switch cabinet current transformer test fixture;
fig. 2 is an enlarged view of a partial structure.
The main parts in the figure are as follows: the cable clamp comprises a crank arm 1, a bolt 2, a double-arm cable clamp 3, a contact 4, a cable 5, a screw handle 6, an insulating pad 7, a movable shaft 8 and a spring 9.
Detailed Description
The invention is further described in detail below with reference to the attached drawing figures:
as shown in fig. 1, the 10kV switch cabinet current transformer test fixture comprises an inverted U-shaped crank arm 1, wherein the inverted U-shaped crank arm 1 is made of an electric wood which is good in material selection insulation and easy to process. The front end of the crank arm is fixed with a rotatable double-arm wire clamp 3 by a bolt 2, and the head of the wire clamp is provided with a plurality of copper spring contacts 4. As shown in fig. 2, the contacts are multiple rows of contacts, one end of each contact is fixed on a movable shaft 8, and the other end of each contact is supported by a spring 9. The contacts may be connected to test cables 5. The rear end of the crank arm is provided with a screw handle 6, and the bottom of the screw is provided with an insulating pad 7.
When the invention is used, the copper contact at the front end is pressed on the wiring aluminum row of the current transformer, and the rear end is arranged on the switch cabinet framework. Through the handle on the twist grip, make the terminal bar of fastener reliable contact current transformer, anchor clamps pass through the cable coupling to test instrument, convenient and fast.
Claims (4)
1. A10 kV switch cabinet current transformer test fixture is characterized in that: the novel cable clamp comprises a crank arm, wherein the crank arm is of an inverted U shape, a double-arm cable clamp is fixed at the front end of the crank arm, a contact is arranged at the head of the cable clamp and is connected with a test cable, a screw handle is arranged at the rear end of the crank arm, and the double-arm cable clamp is rotatable; the contacts are multiple rows of contacts, one end of each contact is fixed on the movable shaft, and the other end of each contact is supported by a spring; when the contact is used, the contact is pressed on the wiring aluminum row of the current transformer, and the wire clamp is reliably contacted with the wiring aluminum row of the current transformer by rotating the handle.
2. A 10kV switchgear current transformer test fixture according to claim 1, characterized in that: the front end of the crank arm is connected with the double-arm wire clamp through a bolt.
3. A 10kV switchgear current transformer test fixture according to claim 1, characterized in that: the crank arm is made of bakelite.
4. A 10kV switchgear current transformer test fixture according to claim 1, characterized in that: the contact is copper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710337397.7A CN106990377B (en) | 2017-05-15 | 2017-05-15 | 10kV switch cabinet current transformer test fixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710337397.7A CN106990377B (en) | 2017-05-15 | 2017-05-15 | 10kV switch cabinet current transformer test fixture |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106990377A CN106990377A (en) | 2017-07-28 |
| CN106990377B true CN106990377B (en) | 2024-02-23 |
Family
ID=59420463
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710337397.7A Active CN106990377B (en) | 2017-05-15 | 2017-05-15 | 10kV switch cabinet current transformer test fixture |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106990377B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108594154A (en) * | 2018-04-12 | 2018-09-28 | 广东电网有限责任公司 | A kind of binding clip of verification transformer station direct current system leakage current mutual inductor |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11299022A (en) * | 1998-04-14 | 1999-10-29 | Fuji Electric Co Ltd | Tester of current transformer in gas-insulated switchgear |
| CN201548567U (en) * | 2009-10-10 | 2010-08-11 | 安徽省电力公司滁州供电公司 | Field calibration disposable test clamp of current transformer |
| CN202159893U (en) * | 2011-07-19 | 2012-03-07 | 广东电网公司东莞供电局 | Switch cabinet provided with zero sequence current transformer |
| CN202216980U (en) * | 2011-09-07 | 2012-05-09 | 湖北省电力公司十堰供电公司 | TA testing dedicated cable cleat |
| CN203148982U (en) * | 2013-04-03 | 2013-08-21 | 国家电网公司 | Test fixture for loop resistance of circuit breaker |
| CN103474797A (en) * | 2013-09-03 | 2013-12-25 | 国家电网公司 | Ground clip in switch cabinet |
| CN104142486A (en) * | 2013-11-29 | 2014-11-12 | 国家电网公司 | Voltage transformer testing tool |
| CN204439671U (en) * | 2015-03-09 | 2015-07-01 | 国家电网公司 | Novel high-pressure switch circuit resistance measured material |
| CN204666659U (en) * | 2015-03-20 | 2015-09-23 | 云南电网有限责任公司西双版纳供电局 | A kind of high-tension switch cabinet equipment test wiring new tool |
| CN204882617U (en) * | 2015-06-30 | 2015-12-16 | 国网山东省电力公司淄博供电公司 | Portable mutual -inductor reference test bar |
| CN205067534U (en) * | 2015-10-27 | 2016-03-02 | 国家电网公司 | High voltage circuit breaker return circuit resistance test anchor clamps |
| CN105425190A (en) * | 2015-12-10 | 2016-03-23 | 国网四川省电力公司电力科学研究院 | Strut-type current transformer field test primary wiring apparatus |
| CN205720326U (en) * | 2016-06-23 | 2016-11-23 | 兴安供电公司 | A kind of electrical equipment rising test auxiliary device |
| CN205787085U (en) * | 2016-06-30 | 2016-12-07 | 温州大学 | The transformer loading fixture of current transformer detection equipment |
| CN206710584U (en) * | 2017-05-15 | 2017-12-05 | 国网辽宁省电力有限公司营口供电公司 | A kind of 10kV switch cabinet current transformers test fixture |
-
2017
- 2017-05-15 CN CN201710337397.7A patent/CN106990377B/en active Active
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11299022A (en) * | 1998-04-14 | 1999-10-29 | Fuji Electric Co Ltd | Tester of current transformer in gas-insulated switchgear |
| CN201548567U (en) * | 2009-10-10 | 2010-08-11 | 安徽省电力公司滁州供电公司 | Field calibration disposable test clamp of current transformer |
| CN202159893U (en) * | 2011-07-19 | 2012-03-07 | 广东电网公司东莞供电局 | Switch cabinet provided with zero sequence current transformer |
| CN202216980U (en) * | 2011-09-07 | 2012-05-09 | 湖北省电力公司十堰供电公司 | TA testing dedicated cable cleat |
| CN203148982U (en) * | 2013-04-03 | 2013-08-21 | 国家电网公司 | Test fixture for loop resistance of circuit breaker |
| CN103474797A (en) * | 2013-09-03 | 2013-12-25 | 国家电网公司 | Ground clip in switch cabinet |
| CN104142486A (en) * | 2013-11-29 | 2014-11-12 | 国家电网公司 | Voltage transformer testing tool |
| CN204439671U (en) * | 2015-03-09 | 2015-07-01 | 国家电网公司 | Novel high-pressure switch circuit resistance measured material |
| CN204666659U (en) * | 2015-03-20 | 2015-09-23 | 云南电网有限责任公司西双版纳供电局 | A kind of high-tension switch cabinet equipment test wiring new tool |
| CN204882617U (en) * | 2015-06-30 | 2015-12-16 | 国网山东省电力公司淄博供电公司 | Portable mutual -inductor reference test bar |
| CN205067534U (en) * | 2015-10-27 | 2016-03-02 | 国家电网公司 | High voltage circuit breaker return circuit resistance test anchor clamps |
| CN105425190A (en) * | 2015-12-10 | 2016-03-23 | 国网四川省电力公司电力科学研究院 | Strut-type current transformer field test primary wiring apparatus |
| CN205720326U (en) * | 2016-06-23 | 2016-11-23 | 兴安供电公司 | A kind of electrical equipment rising test auxiliary device |
| CN205787085U (en) * | 2016-06-30 | 2016-12-07 | 温州大学 | The transformer loading fixture of current transformer detection equipment |
| CN206710584U (en) * | 2017-05-15 | 2017-12-05 | 国网辽宁省电力有限公司营口供电公司 | A kind of 10kV switch cabinet current transformers test fixture |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106990377A (en) | 2017-07-28 |
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