CN116359801B - A cable connection fitting crimping resistance detection device and method - Google Patents
A cable connection fitting crimping resistance detection device and method Download PDFInfo
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- CN116359801B CN116359801B CN202310066974.9A CN202310066974A CN116359801B CN 116359801 B CN116359801 B CN 116359801B CN 202310066974 A CN202310066974 A CN 202310066974A CN 116359801 B CN116359801 B CN 116359801B
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- 238000002788 crimping Methods 0.000 title claims abstract description 38
- 238000001514 detection method Methods 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims description 15
- 238000005070 sampling Methods 0.000 claims abstract description 24
- 238000002347 injection Methods 0.000 claims abstract description 14
- 239000007924 injection Substances 0.000 claims abstract description 14
- 239000004020 conductor Substances 0.000 claims description 4
- 230000002500 effect on skin Effects 0.000 claims description 4
- 230000015556 catabolic process Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/66—Testing of connections, e.g. of plugs or non-disconnectable joints
- G01R31/68—Testing of releasable connections, e.g. of terminals mounted on a printed circuit board
- G01R31/69—Testing of releasable connections, e.g. of terminals mounted on a printed circuit board of terminals at the end of a cable or a wire harness; of plugs; of sockets, e.g. wall sockets or power sockets in appliances
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
- G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
- G01R1/0425—Test clips, e.g. for IC's
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/08—Measuring resistance by measuring both voltage and current
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Abstract
本发明公开了一种电缆连接金具压接电阻检测装置，包括若干个测量夹具、处理器、电源模块、电压采集模块以及电流采集模块；每个测量夹具均包括两个半圆形外套，两个半圆形外套能够合拢或分离；两个半圆形外套的内侧均设置有电流注入卡口，电流注入卡口的内侧形成有半圆形缺口，且两个半圆形外套合拢时，两个半圆形缺口共同形成有能够收容电缆及连接金具的通孔；半圆形外套上还开设有若干个接线口，接线口用于通过接线将与电流注入卡口与电源模块连接；每个半圆形外套均还均固定设置有若干个采样电极，每个采样电极的外端用于与电压采集模块连接，内端指向半圆形外套的圆心方向。
The invention discloses a cable connection fitting crimping resistance detection device, comprising a plurality of measuring fixtures, a processor, a power module, a voltage acquisition module and a current acquisition module; each measuring fixture comprises two semicircular outer sleeves, and the two semicircular outer sleeves can be closed or separated; the inner sides of the two semicircular outer sleeves are provided with current injection bayonet ports, the inner sides of the current injection bayonet ports are formed with semicircular notches, and when the two semicircular outer sleeves are closed, the two semicircular notches jointly form a through hole capable of accommodating cables and connection fittings; the semicircular outer sleeves are also provided with a plurality of wiring ports, and the wiring ports are used to connect the current injection bayonet ports with the power module through wiring; each semicircular outer sleeve is also fixedly provided with a plurality of sampling electrodes, the outer end of each sampling electrode is used to be connected with the voltage acquisition module, and the inner end points to the center direction of the semicircular outer sleeve.
Description
Technical Field
The invention relates to the technical field of cable testing, in particular to a method and a device for detecting crimping resistance of a cable connecting fitting.
Background
At present, the crimping resistance of a cable joint in an on-site construction environment, particularly the crimping resistance of an aluminum alloy cable joint, often lacks a quality control means and method, so that the problems of heating and burning out after the joint crimping resistance is excessively operated for a period of time, voltage withstand breakdown caused by a distorted electric field and the like are caused. Therefore, in order to strictly control the field construction quality, it is necessary to design a set of devices and methods for evaluating the crimping resistance of the cable connection fitting.
Disclosure of Invention
In order to solve the problems in the prior art, the invention aims to provide a method for detecting crimping resistance of a cable connecting fitting.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
The cable connection fitting crimping resistance detection device comprises a plurality of measuring clamps, a processor, a power module, a voltage acquisition module and a current acquisition module;
each measuring clamp comprises two semicircular jackets, and the two semicircular jackets can be folded or separated;
The inner sides of the two semicircular jackets are respectively provided with a current injection bayonet, semicircular notches are formed in the inner sides of the current injection bayonets, and when the two semicircular jackets are folded, through holes capable of accommodating cables and connecting hardware fittings are formed in the two semicircular notches together;
The semicircular outer sleeve is also provided with a plurality of wiring ports, and the wiring ports are used for connecting the current injection bayonet with the power supply module through wiring;
Each semicircular outer sleeve is also fixedly provided with a plurality of sampling electrodes, the outer end of each sampling electrode is used for being connected with the voltage acquisition module, and the inner end of each sampling electrode points to the circle center direction of the semicircular outer sleeve;
the voltage acquisition module and the current acquisition module are respectively used for acquiring required current and voltage information during detection, and the processor is at least used for calculating the crimping resistance of the cable connection fitting according to the acquired current and voltage information.
In some embodiments, the number of the measuring jigs is four, and the measuring jigs are respectively a first jig, a second jig, a third jig and a fourth jig, and the structures of the four measuring jigs are the same;
when the crimping resistance of the cable connecting fitting is detected, the first clamp and the second clamp are respectively arranged on the cables at the two ends of the connecting fitting;
The third clamp and the fourth clamp are arranged on the other section of cable, and the distance between the third clamp and the fourth clamp is the same as the distance between the first clamp and the second clamp;
one end of the power module is electrically connected with the first clamp, the third clamp is electrically connected with the fourth clamp, and the fourth clamp is electrically connected with the other end of the power module to form a loop;
the current acquisition module comprises a current sensor which is arranged in a loop in series;
The voltage acquisition module is provided with a plurality of acquisition channels, wherein two poles of one acquisition channel are respectively connected with sampling electrodes of the first clamp and the second clamp, and two poles of the other acquisition channel are respectively connected with sampling electrodes of the third clamp and the fourth clamp.
In some embodiments, one ends of the two semicircular jackets are rotatably connected by a hinge, and the other ends of the two semicircular jackets are folded or separated by a stud and a corresponding nut.
In some embodiments, each sampling electrode is mounted on the semicircular outer sheath by an outer insulating sheath, the insulating sheath being secured to the semicircular outer sheath, the sampling electrode being capable of sliding within the corresponding insulating sheath.
In some embodiments, the power module comprises a battery, a voltage-regulating frequency-converting module and a current amplifier, wherein the battery is connected with the voltage-regulating frequency-converting module, and the voltage-regulating frequency-converting module is connected with the current amplifier.
In some embodiments, the system further comprises a temperature acquisition module and a display screen, wherein the temperature acquisition module is used for acquiring the temperature of the cable, and the display screen is used for displaying relevant data during detection.
The invention also provides a method for detecting the crimping resistance of the cable connecting fitting, which adopts the device for detecting the crimping resistance of the cable connecting fitting and comprises the following steps:
s1, installing four measuring clamps, a connecting fitting and a cable according to detection requirements, and completing circuit connection;
s2, starting a power supply module, collecting current signals through a current collecting module, and collecting voltage signals between a first clamp and a second clamp and between a third clamp and a fourth clamp through two channels of a voltage collecting module respectively;
s3, respectively calculating the resistance R1 of the cable comprising the connecting fitting between the first clamp and the second clamp and the resistance R2 of the cable between the third clamp and the fourth clamp;
and S4, K=R1/R2, and judging whether the quality of the crimping resistor of the connecting fitting is good or not through the K value.
In some embodiments, after step S4, the method further comprises the steps of:
s5, changing the output frequency of the power supply module, and calculating alternating current resistance values of skin effect depths of different frequencies to obtain distribution conditions of different layers of conductor resistances.
Compared with the prior art, the invention has the beneficial effects that:
The device and the method for detecting the crimping resistance of the cable connecting fitting can conveniently detect the crimping resistance of the cable connecting fitting, avoid the problems of heating burning, pressure breakdown and the like caused by overlarge crimping resistance, and have the advantages of simple structure, low cost, mature process, wide application range and great practical value.
Drawings
FIG. 1 is a schematic circuit diagram of a cable connection fitting crimping resistance detection device provided by the invention when in use;
FIG. 2 is a schematic view of a measurement jig;
Fig. 3 is a schematic module connection diagram of the cable connecting fitting crimping resistance detection device provided by the invention.
Reference numerals illustrate:
1. A processor; 2, a power supply module, 3, a voltage regulating and frequency converting module, 4, a battery, 5, a voltage collecting module, 6, a current collecting module, 7, a temperature collecting module, 8, a display screen, 9, a current amplifier, 10, a first clamp, 11, a second clamp, 12, a third clamp, 13, a fourth clamp, 14, a current sensor, 15, a connecting fitting, 16, a cable, 17, a hinge, 18, a current injection bayonet, 19, a sampling electrode, 20, a stud, 21, a wiring port, 22 and a semicircular outer sleeve.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the present invention easy to understand, the following further describes how the present invention is implemented with reference to the accompanying drawings and the detailed description.
Referring to fig. 1 and 2, in one aspect, the invention provides a cable connection fitting crimping resistance detection device, which comprises a plurality of measurement clamps, a processor 1, a power module 2, a voltage acquisition module 5 and a current acquisition module 6, wherein each measurement clamp comprises two semicircular jackets 22, the two semicircular jackets 22 can be folded or separated, current injection bayonets 18 are arranged on the inner sides of the two semicircular jackets 22, semicircular notches are formed on the inner sides of the current injection bayonets 18, through holes capable of accommodating cables 16 and connection fittings 15 are formed on the two semicircular jackets 22 when the two semicircular jackets 22 are folded, a plurality of wiring ports 21 are formed on the semicircular jackets 22 and used for connecting the current injection bayonets 18 with the power module 2 through wiring, a plurality of sampling electrodes 19 are fixedly arranged on each semicircular jacket 22, the outer ends of the sampling electrodes 19 are connected with the voltage acquisition module 5, the inner ends of the sampling electrodes point to the circle center direction of the semicircular jackets 22, the voltage acquisition module 5 and the current acquisition module 6 are respectively used for acquiring required current and voltage information during detection, and the processor 1 is at least used for calculating the cable crimping resistance information according to acquired current and voltage information.
Preferably, the number of the measuring clamps is four, namely, a first clamp 10, a second clamp 11, a third clamp 12 and a fourth clamp 13, the structures of the four measuring clamps are the same, when the crimping resistance detection of the cable connecting fitting is carried out, the first clamp 10 and the second clamp 11 are respectively arranged on cables 16 at two ends of the connecting fitting 15, the third clamp 12 and the fourth clamp 13 are arranged on the other section of the cables 16, the distance between the third clamp 12 and the fourth clamp 13 is the same as the distance between the first clamp 10 and the second clamp 11, one end of the power module 2 is electrically connected with the first clamp 10, the third clamp 12 and the fourth clamp 13 are electrically connected, the fourth clamp 13 is electrically connected with the other end of the power module 2 to form a loop, the current collecting module 6 comprises a current sensor 14, the current sensor 14 is arranged in series in the loop, the voltage collecting module 5 is provided with a plurality of collecting channels, two poles of one collecting channel are respectively connected with sampling electrodes 19 of the first clamp 10 and the second clamp 11, and two poles of the other collecting channel are respectively connected with sampling electrodes 19 of the third clamp 12 and the fourth clamp 13.
It will be appreciated that the two lengths of cable 16 shown in fig. 1 may be two different portions of the same cable 16 or may be two different cables of uniform gauge.
Preferably, one ends of the two semicircular jackets 22 are rotatably connected by a hinge 17, and the other ends of the two semicircular jackets 22 are folded or separated by a stud 20 and a corresponding nut.
Preferably, each sampling electrode 19 is mounted on a semicircular outer jacket 22 by an outer insulating jacket, which is fixed to the semicircular outer jacket 22, the sampling electrode 19 being able to slide within the corresponding insulating jacket.
In one embodiment, the current injection bayonet 18 may be 2mm thick and machined from a single piece of copper with the semi-circular outer sleeve 22.
Preferably, the power module 2 comprises a battery 4, a voltage-regulating frequency-converting module 3 and a current amplifier 9, wherein the battery 4 is connected with the voltage-regulating frequency-converting module 3, and the voltage-regulating frequency-converting module 3 is connected with the current amplifier 9. The battery 4 can adopt a high-density explosion-proof battery, and is powered by the battery 4 without depending on mains supply, so that the battery can adapt to the use environment of an outdoor site.
Preferably, the device for detecting the crimping resistance of the cable connecting fitting further comprises a temperature acquisition module 7 and a display screen 8, wherein the temperature acquisition module 7 is used for acquiring the temperature of the cable 16, and the display screen 8 is used for displaying related data during detection.
Referring to fig. 3, a voltage acquisition module 5, a current acquisition module 6, a temperature acquisition module 7, a display screen 8, a battery 4 of a power module 2, a voltage and frequency regulation module 3 and a current amplifier 9 can be respectively connected with the processor 1, and the processor 1 controls the operation of each module.
In a specific embodiment, the processor 1 can adopt a floating point processor operator FPU built in a high-speed ARM processor, the voltage and frequency regulation module 3 can output sine wave signals of 0-1 kHz and the power is 500W, and the voltage acquisition module 5 and the current acquisition module 6 have synchronous acquisition functions and acquire the signals through control commands of the processor 1.
The invention also provides a method for detecting the crimping resistance of the cable connecting fitting, which adopts the device for detecting the crimping resistance of the cable connecting fitting and comprises the following steps:
s1, installing four measuring clamps, the connecting fitting 15 and the cable 16 according to detection requirements, and completing circuit connection. In addition, when the measuring jigs are installed, the screw bolts 20 are locked with the corresponding nuts, and simultaneously, the torque wrench can be used for measuring the torque of the nuts, so that the torque of the nuts of the four measuring jigs is the same value, and the error is reduced.
S2, the power module 2 is started, current signals are collected through the current collection module 6, and voltage signals between the first clamp 10 and the second clamp 11 and voltage signals between the third clamp 12 and the fourth clamp 13 are collected through two channels of the voltage collection module 5 respectively.
S3, calculating the resistance R1 of the cable 16 including the connection fitting 15 between the first clamp 10 and the second clamp 11, and the resistance R2 of the cable 16 between the third clamp 12 and the fourth clamp 13, respectively.
And S4, K=R1/R2, and judging whether the quality of the crimping resistor of the connecting fitting 15 is good or not through the K value. Generally, the K value should be less than 1.2.
Preferably, after step S4, the method further comprises the steps of:
S5, changing the output frequency of the power supply module 2, and calculating alternating current resistance values of skin effect depths of different frequencies to obtain distribution conditions of different layers of conductor resistances.
It can be understood that when the power supply module 2 works, the current can be processed by the voltage-regulating frequency-converting module 3 and the current amplifier 9 and then applied to the measuring loop, the output frequency and the power of the power supply module 2 can be regulated, the skin depth can be changed by changing the power supply frequency, and the layering resistance can be calculated by converting equivalent resistance values with different diameters through different depths. Therefore, the detection method provided by the invention can directly calculate whether the joint crimping resistance is in a qualified range or not, and indirectly calculate the equivalent layered resistance value by changing the test frequency.
In conclusion, the device and the method for detecting the crimping resistance of the cable connecting fitting can conveniently detect the crimping resistance of the cable connecting fitting, avoid the problems of heating burning, pressure breakdown and the like caused by overlarge crimping resistance, and are simple in structure, low in cost, mature in process, wide in application range and high in practical value.
Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present invention, which is intended to be covered by the scope of the claims of the present invention.
Claims (5)
1. The cable connection fitting crimping resistance detection device is characterized by comprising a plurality of measuring clamps, a processor (1), a power module (2), a voltage acquisition module (5) and a current acquisition module (6);
Each measuring clamp comprises two semicircular jackets (22), and the two semicircular jackets (22) can be folded or separated;
The inner sides of the two semicircular jackets (22) are provided with current injection bayonets (18), semicircular notches are formed in the inner sides of the current injection bayonets (18), and when the two semicircular jackets (22) are folded, through holes capable of accommodating the cables (16) and the connecting hardware fittings (15) are formed in the two semicircular notches together;
A plurality of wiring ports (21) are also formed in the semicircular outer sleeve (22), and the wiring ports (21) are used for connecting a current injection bayonet (18) with the power module (2) through wiring;
Each semicircular outer sleeve (22) is also fixedly provided with a plurality of sampling electrodes (19), the outer end of each sampling electrode (19) is used for being connected with the voltage acquisition module (5), and the inner end of each sampling electrode points to the center direction of the semicircular outer sleeve (22);
The voltage acquisition module (5) and the current acquisition module (6) are respectively used for acquiring required current and voltage information during detection, and the processor (1) is at least used for calculating the crimping resistance of the cable connection fitting according to the acquired current and voltage information;
Each sampling electrode (19) is arranged on the semicircular outer sleeve (22) through an outer insulating sleeve, the insulating sleeve is fixed on the semicircular outer sleeve (22), and the sampling electrodes (19) can slide in the corresponding insulating sleeves;
The power supply module (2) comprises a battery (4), a voltage-regulating frequency-converting module (3) and a current amplifier (9), wherein the battery (4) is connected with the voltage-regulating frequency-converting module (3), and the voltage-regulating frequency-converting module (3) is connected with the current amplifier (9);
By changing the output frequency of the power supply module (2), the alternating current resistance values of skin effect depths of different frequencies are calculated, and the distribution conditions of different layers of conductor resistances can be obtained.
2. The device for detecting crimping resistance of a cable connection fitting according to claim 1, wherein the number of the measuring jigs is four, and the four measuring jigs are respectively a first jig (10), a second jig (11), a third jig (12) and a fourth jig (13), and have the same structure;
when the crimping resistance of the cable connecting fitting is detected, the first clamp (10) and the second clamp (11) are respectively arranged on the cables (16) at the two ends of the connecting fitting (15);
the third clamp (12) and the fourth clamp (13) are arranged on the other section of cable (16), and the distance between the third clamp (12) and the fourth clamp (13) is the same as the distance between the first clamp (10) and the second clamp (11);
One end of the power module (2) is electrically connected with the first clamp (10), the third clamp (12) is electrically connected with the fourth clamp (13), and the fourth clamp (13) is electrically connected with the other end of the power module (2) to form a loop;
The current acquisition module (6) comprises a current sensor (14), and the current sensor (14) is arranged in a loop in series;
the voltage acquisition module (5) is provided with a plurality of acquisition channels, wherein two poles of one acquisition channel are respectively connected with sampling electrodes (19) of the first clamp (10) and the second clamp (11), and two poles of the other acquisition channel are respectively connected with sampling electrodes (19) of the third clamp (12) and the fourth clamp (13).
3. The device for detecting crimping resistance of a cable connection fitting according to claim 1, wherein one ends of two semicircular jackets (22) are rotatably connected through a hinge (17), and the other ends of the two semicircular jackets (22) are folded or separated through a stud (20) and a corresponding nut.
4. The device for detecting crimping resistance of the cable connection fitting according to claim 1, further comprising a temperature acquisition module (7) and a display screen (8), wherein the temperature acquisition module (7) is used for acquiring the temperature of the cable (16), and the display screen (8) is used for displaying relevant data during detection.
5. A method for detecting crimp resistance of a cable connection fitting, characterized by adopting the cable connection fitting crimp resistance detection device as claimed in any one of claims 2 to 4, and comprising the steps of:
s1, installing four measuring clamps, a connecting fitting (15) and a cable (16) according to detection requirements, and completing circuit connection;
s2, starting a power supply module (2), collecting current signals through a current collecting module (6), and collecting voltage signals between a first clamp (10) and a second clamp (11) and voltage signals between a third clamp (12) and a fourth clamp (13) through two channels of a voltage collecting module (5) respectively;
S3, respectively calculating the resistance R1 of the cable (16) comprising the connecting fitting (15) between the first clamp (10) and the second clamp (11) and the resistance R2 of the cable (16) between the third clamp (12) and the fourth clamp (13);
S4, K=R1/R2, and judging whether the quality of the crimping resistor of the connecting fitting (15) is good or not through the K value;
S5, changing the output frequency of the power supply module (2), and calculating alternating current resistance values of skin effect depths of different frequencies to obtain distribution conditions of different layers of conductor resistances.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310066974.9A CN116359801B (en) | 2023-02-06 | 2023-02-06 | A cable connection fitting crimping resistance detection device and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310066974.9A CN116359801B (en) | 2023-02-06 | 2023-02-06 | A cable connection fitting crimping resistance detection device and method |
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| Publication Number | Publication Date |
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| CN116359801A CN116359801A (en) | 2023-06-30 |
| CN116359801B true CN116359801B (en) | 2025-03-14 |
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| CN202310066974.9A Active CN116359801B (en) | 2023-02-06 | 2023-02-06 | A cable connection fitting crimping resistance detection device and method |
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| CN (1) | CN116359801B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102156215A (en) * | 2011-03-24 | 2011-08-17 | 深圳市瑞雷特电子技术有限公司 | Closed-loop electric test clamp |
| CN207717903U (en) * | 2017-12-05 | 2018-08-10 | 中国电力科学研究院有限公司 | A kind of device of detection cable conductor switching performance |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1764844A (en) * | 2003-03-26 | 2006-04-26 | Jsr株式会社 | Connector for measurement of electric resistance, connector device for measurement of electric resistance and production process thereof, and measuring apparatus and measuring method of electric resis |
| CN201163573Y (en) * | 2008-01-24 | 2008-12-10 | 北京恒源利通电力技术有限公司 | Openable current mutual inductor |
| JP2013024743A (en) * | 2011-07-21 | 2013-02-04 | Chugoku Electric Power Co Inc:The | Clamp type voltage/current measuring device |
| CN202939222U (en) * | 2012-10-19 | 2013-05-15 | 远东电缆有限公司 | Cable conductor direct-current resistance test device |
| EP3382406A1 (en) * | 2017-03-30 | 2018-10-03 | NorthQ ApS | A system and a method for estimation of current transported in a cable |
| CN112782482A (en) * | 2021-01-21 | 2021-05-11 | 中国电力科学研究院有限公司 | Device and method for measuring alternating current resistance of cable conductor |
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- 2023-02-06 CN CN202310066974.9A patent/CN116359801B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102156215A (en) * | 2011-03-24 | 2011-08-17 | 深圳市瑞雷特电子技术有限公司 | Closed-loop electric test clamp |
| CN207717903U (en) * | 2017-12-05 | 2018-08-10 | 中国电力科学研究院有限公司 | A kind of device of detection cable conductor switching performance |
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| CN116359801A (en) | 2023-06-30 |
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