CN201548568U - Primary current testing clamp for calibration of straight plate current transformer on site - Google Patents
Primary current testing clamp for calibration of straight plate current transformer on site Download PDFInfo
- Publication number
- CN201548568U CN201548568U CN2009201881010U CN200920188101U CN201548568U CN 201548568 U CN201548568 U CN 201548568U CN 2009201881010 U CN2009201881010 U CN 2009201881010U CN 200920188101 U CN200920188101 U CN 200920188101U CN 201548568 U CN201548568 U CN 201548568U
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- screw rod
- lower clamping
- slide block
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Abstract
The utility model discloses a primary current testing clamp for calibration of a straight plate current transformer on site. The testing clamp is provided with a conductive testing clamp main body with a U-shaped cross section. The testing clamp main body is provided with flat upper and lower clamping parts in parallel with each other. The lower clamping part main body is vertically in thread connection with a conductive screw rod. The end part of the screw rod is in movable connection with a sliding block in parallel with the two clamping parts. The sliding block is provided with a limit structure to guarantee the sliding block can be driven by the screw rod to linearly slide between the upper and lower clamping parts. The testing clamp can improve a primary current increase value, can also be suitable for calibration on site with different transformation ratio rheology in the switchgear and the metering cabinet, realizes safety and completeness of the calibration on site and increases the economic benefit of the enterprise.
Description
Technical field:
The utility model relates to a kind of board-type current mutual inductor on site verification single test folder.
Background technology:
The present primary current test folder that uses of each electric company, the crocodile clip that provides for instrument plant.
1, this crocodile clip and lead contact area are little, the material guide performance is poor, causes impedance big, makes current lifting device primary current can't be risen to rated primary current.General primary side current can only rise to about 400A, often is difficult to up-flow to current transformer more than 80%, causes the measurement point error such as 100%, 120% can't actual verification.
2, when using traditional crocodile clip verification, reason such as narrow and small and miscellaneous equipment is many owing to space in switch cubicle, the metering cabinet causes in use that limitation is bigger, in addition have just can't carry out field-checking.And impedance causes wire clamp hot big with the standard current transformer power amplifier greatly, makes it when wire clamp is taken off in commutation, causes verification personnel palm to scald and the failure criteria current transformer easily.
Summary of the invention:
For overcoming the defective of prior art, the purpose of this utility model is to provide a kind of current mutual inductor on site verification electric current test wire folder that is applicable to electric pressure 0.38kV～500kV, the different baffles of rated current 5A～3800A.Field-checking rheology since having improved throughout the year with this, primary current can't rise to rated current, has avoided the field-checking difficulty that causes owing to working environment again, with the work efficiency of raising field-checking, finish quality and security level control.
The utility model technical solution problem adopts following technical scheme:
Board-type current mutual inductor on site verification single test folder, described test fixture has the xsect of conduction to be the test folder body of U font, this test folder body has flat and parallel upper and lower clamping part, a conductive lever vertically has been threaded on the following clamping part body, the active slide block parallel that be connected with in the end of described screw rod, described slide block with two clamping parts be provided with position limiting structure with guarantee slide block can under the drive of screw rod between upper and lower clamping part linear slide.
Design feature of the present utility model also is:
Described upper and lower clamping part and both connecting portions and described slide block constitute E font structure jointly, the both sides symmetry of slide block is installed with two boss, the both sides that these two boss are stuck in the connecting portion of upper and lower clamping part constitute the position limiting structure of slide block, in case limited slip block rotates with screw rod.
The end of described screw rod is hinged with an insulated handle.
Offer the screw that is used for fixing test wire on the connecting portion of described upper and lower clamping part.
Compared with the prior art, the beneficial effects of the utility model are embodied in:
The flat structure that the position of this test folder clamping copper bar is designed to conduct electricity can improve the up-flow value greatly one time, and can be suitable for the field-checking that is installed on different no-load voltage ratio rheologies in switch cubicle, the metering cabinet.Realize security, the integrality of field-checking and increased economic benefit of enterprises.Handle can the fine lever principle of utilizing, and just can make with less power and test folder and copper bar or aluminum stranded conductor clamping, and handle can fold and packs up.
Description of drawings:
Fig. 1 is a structural representation of the present utility model; Fig. 2 is the left view of Fig. 1.
Number in the figure: clamping part on 1,2 times clamping parts, 3 screw rods, 4 slide blocks, 41 boss, 5 connecting portions, 6 handles, 7 test wires, 8 screws.
Below pass through embodiment, and the utility model is described in further detail in conjunction with the accompanying drawings.
Embodiment, non-limiting examples is as described below:
Embodiment: the test folder of present embodiment, be used to be clamped in that the primary current to mutual inductor detects on the copper bar at mutual inductor two ends, in conjunction with Fig. 1, described test fixture has the xsect of conduction to be the test folder body of U font, this test folder body have flat and parallel on, following clamping part 1,2, a conductive lever 3 vertically has been threaded on following clamping part 2 bodies, the active slide block 4 parallel with two clamping parts that be connected with in the end of described screw rod, described slide block are provided with position limiting structure to guarantee that it can be last under the drive of screw rod 3, linear slide between following clamping part.
In conjunction with Fig. 2, described upper and lower clamping part and both connecting portions 5 and described slide block constitute E font structure jointly, the position limiting structure of slide block is to be provided with like this: be installed with two boss 31 in the both sides of slide block symmetry, these two boss are stuck in the both sides of the connecting portion 5 of upper and lower clamping part, in case limited slip block rotates with screw rod.
Shown in Fig. 1,2, the end of screw rod 3 is hinged with an insulated handle 6.Offer the screw 8 that is used for fixing test wire 7 on the connecting portion 5 of upper and lower clamping part.
During use, the inboard of last clamping part 1 is fitted in the outside of copper bar, shake handle 6 and drive screw rod 3 rotations, screw drive slide block 4 clamping part 1 place up slides, until copper bar is clamped, electric current can be drawn from test wire 7, because the position of clamping copper bar is the flat structure of conduction, improve the up-flow value greatly one time, and can be suitable for the field-checking that is installed on different no-load voltage ratio rheologies in switch cubicle, the metering cabinet.Realize security, the integrality of field-checking and increased economic benefit of enterprises.In specifically being provided with, each current-carrying part adopts hardness height, in light weight, metal materials making such as internal resistance is little, non-corrosive, and handle is also collapsible when not using packs up.When making wire clamp, consider reasons such as work space is narrow and small in switch cubicle, the metering cabinet, equipment is many, crocodile clip in the past is not easy to operation, promptly designs small and exquisite, flexible, easy dress, readily removable electric current single test folder, and maximum carrying capacity press 3800A and designed.
Claims (4)
1. board-type current mutual inductor on site verification single test is pressed from both sides, it is characterized in that, described test fixture has the xsect of conduction to be the test folder body of U font, this test folder body has flat and parallel upper and lower clamping part (1,2), a conductive lever (3) vertically has been threaded on following clamping part (2) body, the active slide block (4) parallel that be connected with in the end of described screw rod, described slide block with two clamping parts be provided with position limiting structure with guarantee slide block can under the drive of screw rod (3) between upper and lower clamping part linear slide.
2. board-type current mutual inductor on site verification single test folder according to claim 1, it is characterized in that, described upper and lower clamping part (1,2) and both connecting portions (5) and described slide block (4) constitute E font structure jointly, the both sides symmetry of slide block is installed with two boss (41), the both sides that these two boss are stuck in the connecting portion (5) of upper and lower clamping part constitute the position limiting structure of slide block, in case limited slip block rotates with screw rod (3).
3. board-type current mutual inductor on site verification single test folder according to claim 1 is characterized in that the end of described screw rod (3) is hinged with an insulated handle (6).
4. board-type current mutual inductor on site verification single test folder according to claim 1 is characterized in that, offers the screw (8) that is used for fixing test wire (7) on the connecting portion (5) of described upper and lower clamping part (1,2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201881010U CN201548568U (en) | 2009-10-10 | 2009-10-10 | Primary current testing clamp for calibration of straight plate current transformer on site |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201881010U CN201548568U (en) | 2009-10-10 | 2009-10-10 | Primary current testing clamp for calibration of straight plate current transformer on site |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201548568U true CN201548568U (en) | 2010-08-11 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201881010U Expired - Fee Related CN201548568U (en) | 2009-10-10 | 2009-10-10 | Primary current testing clamp for calibration of straight plate current transformer on site |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201548568U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102385045A (en) * | 2011-10-25 | 2012-03-21 | 保定天威集团有限公司 | Error test method for heavy current transformer and special device used in same |
| CN102590780A (en) * | 2012-02-20 | 2012-07-18 | 四川省电力公司自贡电业局 | Elastic crimping device for calibrating current transformer |
| CN103995246A (en) * | 2014-05-24 | 2014-08-20 | 国网河南省电力公司南阳供电公司 | Field calibration test line self-suction type wire tidying clamp |
| CN105004890A (en) * | 2015-06-29 | 2015-10-28 | 国网山东省电力公司淄博供电公司 | Fault detection device operating low-voltage current transformer |
| CN106556814A (en) * | 2015-09-30 | 2017-04-05 | 广西电网有限责任公司桂林供电局 | A kind of current transformer rising test folder |
| CN108037333A (en) * | 2015-11-27 | 2018-05-15 | 浙江八达电子仪表有限公司 | The adjustable three-phase intelligent electric-energy meter of residual current threshold value |
| CN108037334A (en) * | 2015-11-27 | 2018-05-15 | 浙江八达电子仪表有限公司 | Gather the single-phase intelligent electric energy meter structure of residual current |
| CN112557707A (en) * | 2020-12-02 | 2021-03-26 | 广东电网有限责任公司 | Upflow test clamp |
-
2009
- 2009-10-10 CN CN2009201881010U patent/CN201548568U/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102385045B (en) * | 2011-10-25 | 2013-06-12 | 保定天威集团有限公司 | Error test method for heavy current transformer and special device used in same |
| CN102385045A (en) * | 2011-10-25 | 2012-03-21 | 保定天威集团有限公司 | Error test method for heavy current transformer and special device used in same |
| CN102590780B (en) * | 2012-02-20 | 2014-09-10 | 四川省电力公司自贡电业局 | Elastic crimping device for calibrating current transformer |
| CN102590780A (en) * | 2012-02-20 | 2012-07-18 | 四川省电力公司自贡电业局 | Elastic crimping device for calibrating current transformer |
| CN103995246B (en) * | 2014-05-24 | 2016-09-14 | 国网河南省电力公司南阳供电公司 | Field-checking p-wire self-priming reason wire clamp |
| CN103995246A (en) * | 2014-05-24 | 2014-08-20 | 国网河南省电力公司南阳供电公司 | Field calibration test line self-suction type wire tidying clamp |
| CN106153990A (en) * | 2014-05-24 | 2016-11-23 | 国网河南省电力公司南阳供电公司 | P-wire self-priming reason wire clamp |
| CN105004890A (en) * | 2015-06-29 | 2015-10-28 | 国网山东省电力公司淄博供电公司 | Fault detection device operating low-voltage current transformer |
| CN106556814A (en) * | 2015-09-30 | 2017-04-05 | 广西电网有限责任公司桂林供电局 | A kind of current transformer rising test folder |
| CN108037333A (en) * | 2015-11-27 | 2018-05-15 | 浙江八达电子仪表有限公司 | The adjustable three-phase intelligent electric-energy meter of residual current threshold value |
| CN108037334A (en) * | 2015-11-27 | 2018-05-15 | 浙江八达电子仪表有限公司 | Gather the single-phase intelligent electric energy meter structure of residual current |
| CN108254599A (en) * | 2015-11-27 | 2018-07-06 | 浙江八达电子仪表有限公司 | Acquire the three-phase intelligent electric-energy meter structure of residual current |
| CN112557707A (en) * | 2020-12-02 | 2021-03-26 | 广东电网有限责任公司 | Upflow test clamp |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100811 Termination date: 20171010 |