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Wiring detection device for straight-through current transformer

A technology of wiring device and through-core current, applied in the direction of measuring device, measuring device shell, instrument, etc., can solve the problems of bulky test equipment, increased test cost, and inability to erect large equipment at any time, so as to improve work efficiency and reduce test cost effect

Inactive Publication Date: 2014-12-24
CHINA SOUTHERN POWER GRID EHV POWER TRANSMISSION COMPANY WUZHOU BUREAU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this time, if an independent generator and a large-capacity current generator are used to conduct a flow-through test, not only the required test equipment is bulky, but the working environment of the test site cannot be erected at any time, and the test cost will increase significantly
The second way is to increase the number of turns of the iron coil wound on the primary side. However, if a multi-turn coil is used, it is necessary to repeatedly wind the wire on the primary side before each test. , it is necessary to change the number of winding turns on the primary side in the middle of the test, so that the repeated disassembly and assembly of cables reduces the work efficiency

Method used

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  • Wiring detection device for straight-through current transformer
  • Wiring detection device for straight-through current transformer
  • Wiring detection device for straight-through current transformer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] see figure 1 , Embodiment 1 of a detection wiring device for a through-core current transformer of the present invention, the wiring device is a coil loop composed of a cable ratio adjustment box 1 and an external cable 2, and the external cable 2 has multiple wires inside, After the wires are connected to the internal circuit of the cable ratio adjustment box 1, a coil with multiple windings is formed.

[0031] Please combine further figure 2 with image 3 , to facilitate a clearer understanding of the specific structure and electrical principles of this embodiment.

[0032] Both ends of the external cable 2 are respectively provided with a first pluggable connector 21 and a second pluggable connector 22 . The number of copper wires in the external cable 2 can be 20 or 30 or other numbers. In this embodiment, 20 external cables 2 are selected with a maximum carrying capacity of 20A and a cross-sectional area of ​​2.5mm 2 copper wires, the external cable 2 is not ...

Embodiment 2

[0040] see Image 6 , an embodiment 2 of the detection wiring device for a feedthrough current transformer of the present invention, the components of the wiring device of this embodiment are the same as those of the embodiment 1, and are composed of a cable ratio adjustment box 1 and an external cable 2 In the formed coil loop, the external cable 2 has multiple wires inside, and these wires are connected to the internal circuit of the cable ratio adjustment box 1 to form a coil with multiple windings.

[0041] The difference from Embodiment 1 is that the connection relationship between lines and ports is different. For details, refer to Figure 7 with Figure 8 .

[0042] Figure 7 Shown is the external cable 2 of this embodiment 2, the PIN bits B-1 to B-19 of the second pluggable connection plug 22 of the external cable 2 pass through the wires in the cable in turn, and are electrically connected to the first pluggable connection The PIN bits A-2 to A-20 of the head 21, ...

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Abstract

The invention discloses a wiring detection device for a straight-through current transformer. The wiring detection device comprises a cable transformation ratio adjustor, an external cable, a wire inlet end and a wire outlet end, wherein test current passes through the wire inlet end and the wire outlet end. The cable transformation ratio adjustor comprises a universal switch and a coil formation circuit. The coil formation circuit is provided with a first exterior wire access end, a second exterior wire access end and a wire set electrically connected with the two exterior wire access ends. The two ends of the external cable are first and second pluggable connectors matched with the first and second exterior wire access ends in a pluggable mode. A solenoid coil is formed by electrically connecting the two ends of the external cable and the coil formation circuit in a staggered mode. The port on one side of the universal switch and the coil formation circuit are connected to conduct gating on the wire access number of the external cable, and ports on the other side of the universal switch are connected in parallel to be used as the wire inlet end. According to the wiring detection device, a through-flow test is carried out on the straight-through current transformer at a time with no independent electricity generator or a high-capacity current generator, and an external circuit does not need to be repeatedly disconnected to be wound around the current transformer in the testing process.

Description

technical field [0001] The invention relates to the field of devices for calibration, verification and detection of electric equipment, in particular to a detection wiring device for a feedthrough current transformer. Background technique [0002] In the lines of power generation, transformation, transmission, distribution and consumption, the current varies widely, ranging from a few amps to thousands of amps. In order to facilitate measurement, protection and control, it needs to be converted into a relatively uniform current. In addition, on the line If the high voltage is directly measured, it is very dangerous. Through the feed-through current transformer, it can play the role of current transformation and electrical isolation. [0003] The core-through current transformer is based on the principle of electromagnetic induction. It is composed of a closed iron core and a winding. It has a primary side winding and a secondary side winding. The number of turns is relative...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R35/02G01R1/04
Inventor 吴志宇黎珏强韦鑫陈满江吕军蓉温才权全杰雄宋永佳禤海贞
Owner CHINA SOUTHERN POWER GRID EHV POWER TRANSMISSION COMPANY WUZHOU BUREAU