CN212965243U - Direct current resistance detection system for long-distance conductor - Google Patents

Direct current resistance detection system for long-distance conductor Download PDF

Info

Publication number
CN212965243U
CN212965243U CN202022015951.XU CN202022015951U CN212965243U CN 212965243 U CN212965243 U CN 212965243U CN 202022015951 U CN202022015951 U CN 202022015951U CN 212965243 U CN212965243 U CN 212965243U
Authority
CN
China
Prior art keywords
positive
negative input
component
input
direct current
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
CN202022015951.XU
Other languages
Chinese (zh)
Inventor
邢万军
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.)
Shanghai Jinfeng Cable Co ltd
Original Assignee
Shanghai Jinfeng Cable Co ltd
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 Shanghai Jinfeng Cable Co ltd filed Critical Shanghai Jinfeng Cable Co ltd
Priority to CN202022015951.XU priority Critical patent/CN212965243U/en
Application granted granted Critical
Publication of CN212965243U publication Critical patent/CN212965243U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Abstract

The utility model provides a long distance conductor direct current resistance detecting system, include: an input unit, an output unit, a processing unit, a control unit, and a remote test terminal unit; the processing component is connected with the control component; the input component and the output component are connected with the control component; the direct current resistance detection device is arranged in the long-distance conductor direct current resistance detection device; the input section includes: the positive and negative input clamp component, the positive and negative input lead component and the positive and negative input access terminal component; the positive and negative input clamp parts are connected with the positive and negative input lead parts; the positive and negative input lead parts are arranged on the positive and negative input access terminal parts; the remote test terminal member includes: one or more remote test end terminals; the plurality of remote test end terminals are connected in parallel. The utility model discloses can effectively advance accurate measurement and install in the conductor direct current resistance of the cable of job site operation.

Description

Direct current resistance detection system for long-distance conductor
Technical Field
The utility model relates to a resistance detection technical field specifically, relates to a long distance conductor direct current resistance detecting system.
Background
At present, the direct current resistance measurement of a cable conductor is carried out by adopting a bridge resistance method. The specific method of the test is to take 1.2 meters of the conductor to be tested, place the conductor in a laboratory for 12 hours, wait for the temperature of the conductor to be balanced with the test temperature, and then carry out the electrical group measurement of the conductor. Such a test method, which is a sampling test method, is not very capable of truly reflecting the condition of direct current resistance of the cable conductor of the whole disc. Even if there is a whole disk of equipment for testing the resistance, the distance between two ends of the tested cable is small. There is no way to test when the cable ends are far apart.
Patent document CN209215434U discloses a cable test fixture, which includes: the insulating seat is internally provided with a vertical through hole and a horizontal through hole which are communicated; the wire clamping sleeve is fixedly arranged in the transverse through hole, and a through hole communicated with the vertical through hole is formed in the sleeve wall of the wire clamping sleeve; the test rod is slidably arranged in the vertical through hole and the through hole in a penetrating way, and one end of the test rod is connected with a test lead; have the horizontal hole on the test bar, the cover is equipped with reset spring on the test bar in vertical through-hole, reset spring is set up to: when the other end of the test rod is pressed, the reset spring is compressed, so that the transverse hole is communicated with the wire clamping sleeve; when the reset spring resets, the transverse hole and the wire clamping sleeve are staggered, and the clamping of the cable core is realized. The structure and performance of the patent still leaves room for improvement.
SUMMERY OF THE UTILITY MODEL
To the defect among the prior art, the utility model aims at providing a long distance conductor direct current resistance detecting system.
According to the utility model provides a pair of long distance conductor direct current resistance detecting system, include: an input unit, an output unit, a processing unit, a control unit, and a remote test terminal unit;
the processing component is connected with the control component;
the input component and the output component are connected with the control component;
the detection system is arranged in the long-distance conductor direct current resistance detection system;
the input section includes: the positive and negative input clamp component, the positive and negative input lead component and the positive and negative input access terminal component;
the positive and negative input clamp parts are connected with the positive and negative input lead parts;
the positive and negative input lead parts are arranged on the positive and negative input access terminal parts;
the remote test terminal member includes: one or more remote test end terminals;
the plurality of remote test end terminals are connected in parallel.
Preferably, the positive and negative input terminal members include: a positive input access terminal 3 and a negative input access terminal 2;
preferably, the positive and negative electrode input lead members include: a positive input lead 5 and a negative input lead 4;
the positive input lead 5 is connected with the positive input access terminal 3;
the negative input lead 4 is connected with the negative input access terminal 2;
preferably, the positive and negative electrode input jig part includes: a positive input clamp 7 and a negative input clamp 6;
the positive input clamp 7 is connected with the positive input lead 5;
the negative input clamp 6 is connected with the negative input lead 4.
Preferably, the input means comprises: a power input part, a power line 11;
the power input part is connected with a power line 11;
preferably, the output part includes: displaying a touch screen 10;
the display touch screen 10 is arranged on one surface of the long-distance conductor direct current resistance detection system;
the control part includes: a case box 8, an equipment base 9 and a power switch 1;
the equipment base 9 is arranged below the case box 8.
A method for detecting direct current resistance of a long-distance conductor comprises the following steps:
step S1: connecting the far testing terminals of the first core wire and the second core wire in parallel, and measuring the sum of the direct current resistances of the conductors of the third core wire and the second core wire to be R at the near testing endAB；
Step S2: connecting the far testing terminals of the first wire core and the third wire core in parallel, and measuring the sum of the direct current resistances of the conductors of the third wire core and the third wire core to be R at the near testing endAC；
Step S3: connecting the far testing terminals of the second core wire and the third core wire in parallel, and measuring the sum of the direct current resistances of the conductors of the second core wire and the third core wire to be R at the near testing endBC；
Step S4: directly obtaining the induced resistance value R of each wire core of the tested cableA、RB、RC。
Preferably, the step S1 includes:
step S1.1: inserting a power line into a corresponding power supply, turning on a device switch, zeroing the device, inputting the ambient temperature of the tested cable into temperature value information through a touch screen, and inputting the length of the cable into length value information;
the wiring terminal at the far testing end of the far three-core cable is in short circuit through a clamp, then a clamp is added on the terminal at the near testing end of the cable, the clamp is added on the terminal at the near testing end of the cable, and at the moment, the real-time numerical value of the resistance of the touch display screen is obtained;
according to the first data recording control information, the display value automatically jumps onto the measured value, and the corresponding position R in the chip is recordedAB.；
The step S2 includes:
step S2.1, loosening a clamp of a wiring terminal A and a clamp of a wiring terminal B at the far testing end of the three-core cable, separating the wiring terminal A and the wiring terminal B to enable the wiring terminal A and the wiring terminal B to be isolated and suspended, and carrying out short circuit on the wiring terminal A and the wiring terminal C at the far testing end of the three-core cable through the clamps;
then a clamp is applied to the near-test end of the cableOn the sub-A, a clamp is added on a wiring terminal C near the testing end of the cable, control information is recorded according to second data, and a corresponding position R in the chip is recordedAC.；
Step S2.2: the clamp of the wiring terminal A and the clamp of the wiring terminal C at the far testing end of the three-core cable are loosened, the wiring terminal A and the wiring terminal C are separated to be suspended, the wiring terminal B and the wiring terminal C at the far testing end of the three-core cable are in short circuit through the clamp, and then the clamp is added on the wiring terminal B at the near testing end of the cable;
adding the clamp on a wiring terminal C of the cable close to the testing end, and touching the real-time numerical value of the resistance of the display screen at the moment;
recording the corresponding position R in the chip according to the third data recording control informationBC.；
Preferably, the step S3 includes:
step S3.1: the fixture is added on a wiring terminal A close to the testing end of the cable, the fixture is added on a wiring terminal B close to the testing end of the cable, and at the moment, the real-time numerical value of the resistance of the touch display screen is obtained;
recording the corresponding position R in the chip according to the fourth data recording control informationAB。
Preferably, the step S4 includes:
step S4.1: respectively obtaining resistance value test values of the third core wire, the second core wire and the third core wire, and then obtaining any one of the following numerical values through temperature conversion:
-the first core causes a resistance value RA；
-the second core causes a resistance value RB；
-a third core causing a resistance value RC；
The resistance value test values of the third core wire, the second core wire and the third core wire can be obtained by the following formulas
RA＝(RAB-RAC+RBC)/2
RB＝(RAB+RAC-RBC)/2
RC＝(RAC-RAB+RBC)/2
L’＝RA/E/1000*F’
M’＝RB/E/1000*F’
N’＝RC/E/1000*F’
The L 'is a first output value, the M' is a second output value, and the N 'is a third output value N';
the E is a length value, and the F' temperature coefficient.
Compared with the prior art, the utility model discloses following beneficial effect has:
1. the utility model discloses can effectively advance accurate measurement and install in the conductor direct current resistance of the cable of job site operation. Therefore, the damage degree of the cable in the using process is judged, and the later service life of the cable is judged;
2. the utility model provides scientific basis for judging whether the cables are replaced or not, and measures regularly, thereby avoiding the heavy equipment using the cables from breaking down suddenly in the operation process and causing great economic loss;
3. the utility model discloses rational in infrastructure, convenient to use can overcome prior art ground defect.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a schematic view of a test site layout according to an embodiment of the present invention.
Fig. 3 is a schematic cross-sectional view of a tested cable according to an embodiment of the present invention.
In the figure:
positive pole input clamp 7 of power switch 1
Positive input access terminal 3 case box 8
Negative input access terminal 2 equipment base 9
Positive input lead 5 display touch screen 10
Negative input lead 4 power line 11
Negative input clamp 6
Detailed Description
The present invention will be described in detail with reference to the following embodiments. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that various changes and modifications can be made by one skilled in the art without departing from the spirit of the invention. These all belong to the protection scope of the present invention.
A long distance conductor dc resistance detection system comprising the following components:
input means (including power input means, power supply lines, positive and negative input clamps, positive and negative input leads, positive and negative input access terminals; which may be, for example, a clamp, and a display touch screen);
the display touch screen includes: temperature value F (DEG C) length value E (meter) of cable to be measured, or other members
An output unit (the output unit comprises a display touch screen, the display touch screen comprises year, month, day, time, temperature coefficient F ', actual measurement resistance (omega), value calculation value (omega/km), measurement value A, measurement value B, measurement value C, measurement value D, intermediate value L (omega), M (omega), N (omega), O (omega), and final output value L ' (omega), M ' (omega), N ' (omega), O ' (omega);
processing means (program integrated circuit board-chip, inside the device);
-a control component;
the control part includes: a power switch, a case box and an equipment base;
the input component is respectively arranged at one end of the input component, and the other end of the input component is respectively correspondingly arranged on the input component terminal; the input component is internally welded on the program integrated circuit board, and the external part is arranged on the case box of the control component; the power line of the input component is internally welded on the program integrated circuit board, and the power line of the input component is externally arranged on the case box of the control component; the power switch of the control component is internally welded on the program integration circuit board, and is externally arranged on the case box of the control component; the inside of a display touch screen of the output component is welded on the program integrated circuit board, and the outside of the display touch screen is arranged on a case box of the control component;
the control part includes: a power switch, a case box and an equipment base;
the power switch is internally welded on the program integration circuit board, and the external part is arranged on the case box of the control component;
a control unit equipment base arranged at the bottom of the control unit case box
Specifically, in one embodiment, a method for detecting the direct current resistance of a long-distance conductor comprises the following steps:
step S1: the far testing end terminals of the core wires A and B are connected in parallel, and the near testing end is used for measuring the sum of the direct current resistances of the conductors of the core wires A and the core wires B as RAB；
Step S2: the far testing end terminals of the core wires A and C are connected in parallel, and the near testing end is used for measuring the sum of the direct current resistances of the conductors of the core wires A and the core wires C as RAC；
Step S3: the far testing end terminals of the core wires B and C are connected in parallel, and the near testing end is used for testing the sum of the direct current resistances of the conductors of the core wires B and the core wires C as RBC；
Step S4: directly obtaining the induced resistance value R of each wire core of the tested cableA、RB、RC。
Step S1 includes:
step S1.1: insert corresponding power to the power cord, open equipment switch, zero set equipment, then type into the ambient temperature that is surveyed the cable and is located through the touch-sensitive screen: within the "temperature value F", the length of the cable is entered within the "length value E" and the measurement is started: the wiring terminal A and the wiring terminal B at the far testing end of the far three-core cable are in short circuit through a clamp, then a clamp is added on the terminal A at the near testing end of the cable, and the clamp is added on the near testing end of the cableTouching the real-time resistance value of the display screen on the terminal B, and manually clicking the data recording button of the display screen to automatically jump the display value onto the measured value A to record the corresponding position R in the chipAB。
Step S2 includes:
s2.1, loosening clamps of a wiring terminal A and a wiring terminal B at the far testing end of the three-core cable, separating the terminals A and B to be isolated and suspended, carrying out short circuit on the wiring terminal A and the wiring terminal C at the far testing end of the three-core cable through the clamps, then adding a clamp on the near testing end terminal A of the cable, adding the clamp on the near testing end terminal C of the cable, touching the real-time resistance value of the display screen at the moment, manually clicking a data recording button of the display screen, automatically jumping the display value onto the measured value B, and recording a corresponding position R in the chipAC；
S2.2, loosening the clamp of the wiring terminal A and the wiring terminal C at the far testing end of the three-core cable, separating the terminal A and the terminal C to be isolated and suspended, carrying out short circuit on the wiring terminal B and the wiring terminal C at the far testing end of the three-core cable through the clamp, then adding the clamp on the terminal B at the near testing end of the cable, adding the clamp on the terminal C at the near testing end of the cable, touching the real-time resistance value of the display screen at the moment, manually clicking a data recording button of the display screen, automatically jumping the display value onto the measured value C, and recording the corresponding position R in the chipBC；
The step S3 includes:
the clamp is added on the terminal A close to the testing end of the cable, the clamp is added on the terminal B close to the testing end of the cable, the real-time numerical value of the resistance of the display screen is touched at the moment, the data recording button of the display screen is clicked by hand, the display value can automatically jump into the upper part of the measured value A, and the corresponding position R in the recording chip is recordedAB；
The step S4 includes:
step S4.1: the calculation of this step, the device chip has already been entered, is finished by the chip automatic calculation, the main procedure is as follows 1: the core wires A, B and C can be obtained by the following formulasThen the resistance value R of each wire core of the tested cable is directly obtained through temperature conversionA、RB、RC。
RA＝(RAB-RAC+RBC)/2；
RB＝(RAB+RAC-RBC)/2；
RC＝(RAC-RAB+RBC)/2；
Output value L ═ RALength value E/1000 temperature coefficient F';
output value M ═ RBLength value E/1000 temperature coefficient F';
output value N ═ RCLength value E/1000 temperature coefficient F';
in the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.
The foregoing description of the specific embodiments of the invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by those skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.

Claims (6)

1. A long distance conductor dc resistance detection system, comprising: an input unit, an output unit, a processing unit, a control unit, and a remote test terminal unit;
the processing component is connected with the control component;
the input component and the output component are connected with the control component;
the input section includes: the positive and negative input clamp component, the positive and negative input lead component and the positive and negative input access terminal component;
the positive and negative input clamp parts are connected with the positive and negative input lead parts;
the positive and negative input lead parts are arranged on the positive and negative input access terminal parts;
the remote test terminal member includes: one or more remote test end terminals;
the plurality of remote test end terminals are connected in parallel.
2. The long-distance conductor direct current resistance detection system of claim 1, wherein the positive and negative input access terminal components comprise: a positive input access terminal (3) and a negative input access terminal (2).
3. The long-distance conductor direct current resistance detection system of claim 1, wherein the positive and negative input lead members comprise: a positive input lead (5) and a negative input lead (4);
the positive input lead (5) is connected with the positive input access terminal (3);
and the negative input lead (4) is connected with the negative input access terminal (2).
4. The system of claim 1, wherein the positive and negative input clamp components comprise: a positive input clamp (7) and a negative input clamp (6);
the positive input clamp (7) is connected with the positive input lead (5);
and the negative input clamp (6) is connected with the negative input lead (4).
5. The long-distance conductor direct current resistance detection system of claim 1, wherein the input component comprises: a power input part, a power line (11);
the power input part is connected with a power line (11).
6. The long-distance conductor direct current resistance detection system of claim 1, wherein the output component comprises: a display touch screen (10);
the display touch screen (10) is arranged on one surface of the long-distance conductor direct current resistance detection system;
the control part includes: a case box (8), an equipment base (9) and a power switch (1);
the equipment base (9) is arranged below the case box (8).
CN202022015951.XU 2020-09-15 2020-09-15 Direct current resistance detection system for long-distance conductor Active CN212965243U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202022015951.XU CN212965243U (en) 2020-09-15 2020-09-15 Direct current resistance detection system for long-distance conductor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202022015951.XU CN212965243U (en) 2020-09-15 2020-09-15 Direct current resistance detection system for long-distance conductor

Publications (1)

Publication Number Publication Date
CN212965243U true CN212965243U (en) 2021-04-13

Family

ID=75370298

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202022015951.XU Active CN212965243U (en) 2020-09-15 2020-09-15 Direct current resistance detection system for long-distance conductor

Country Status (1)

Country Link
CN (1) CN212965243U (en)

Similar Documents

Publication Publication Date Title
US6544078B2 (en) Battery clamp with integrated current sensor
CN205333740U (en) Direct -current resistance tester
CN202041602U (en) Electric appliance circuit fault detection tool
CN109814005A (en) A kind of cable insulation defect recognition and localization method and system
CN103513111A (en) System and method for testing electric conductivity of metal wire
CN207148230U (en) Wireless high-low pressure ratio tester for current transformer
CN111948495A (en) System and method for detecting direct current resistance of long-distance conductor
CN106841986A (en) PCBA board test device and system
CN212965243U (en) Direct current resistance detection system for long-distance conductor
CN210037946U (en) Current measuring device based on TMR tunnel magnetic resistance
CN210346590U (en) Wireless static strain tester and wireless static strain test system
CN205789242U (en) A kind of power cable semi-conductive layer resistivity test device
CN109188118A (en) A kind of electronic component test device
CN111537797B (en) System and method for measuring insulation resistance of transformer substation without disassembling lead
CN2074913U (en) Digital soil conductivity testing instrument
US8912787B2 (en) System and method to provide talking feature and interactive voice menu in phasing meters
CN208125876U (en) A kind of triode Kelvin test suite
CN111983315A (en) Conductor direct current resistance detection device and method based on infrared temperature measurement
CN112904087A (en) Device and method for measuring resistance of double-end grounding loop and resistance of grounding grid
CN105890808A (en) Temperature calibrator for main transformer
CN209859430U (en) Single-phase ammeter wire-stealing loss simulation analysis teaching aid
CN204188130U (en) A kind of carbon resistance rod button is apart from connecting measuring instrument
CN103293508A (en) Current transformer calibration device
US9804204B2 (en) Method of implementation of peak hold in a phasing voltmeter
CN106771613A (en) A kind of cable crimps resistance nondestructive measurement system

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant