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Mutual inductor handover test switching device and switching method thereof

A switching device, handover test technology, applied in the direction of measuring device, measuring device casing, instrument, etc., can solve the problem of time-consuming and laborious, and achieve the effect of improving test efficiency, ensuring accuracy, and reasonable layout

Active Publication Date: 2020-07-10
GUIZHOU POWER GRID CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] First aspect: For the above test items, the position of the test line that needs to be connected to the secondary terminal is different, and the state of the short circuit of the outgoing terminal of the secondary winding is also different. It is necessary for the tester to frequently change the test line connected to the secondary terminal. The position and the short-circuit state of the secondary terminals are used to meet the requirements of various tests, which is time-consuming and labor-intensive

Method used

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  • Mutual inductor handover test switching device and switching method thereof
  • Mutual inductor handover test switching device and switching method thereof
  • Mutual inductor handover test switching device and switching method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0043] Embodiment 1: as Figure 1-12 Shown, a transformer handover test switching device, including four sets of switching loops, respectively: the first set of secondary winding switching loops, the second set of secondary winding switching loops, the third set of secondary winding switching loops and the fourth set of The secondary winding switching circuit includes I+ input terminal, I- input terminal, U+ input terminal, U-input terminal, switch one, switch two, output E, output L and output D, I+ input and U+ The input terminal is connected in parallel to one end of the secondary winding of the transformer, the I-input terminal and U-input terminal are connected in parallel to the other end of the secondary winding of the transformer, and the I+ input terminal is respectively connected to the output terminal D and I-input terminal through the switching switch 1. - The input end is connected to the output end E and the output end L respectively through the switching switch ...

Embodiment 2

[0050] Embodiment 2: A switching method of a transformer handover test switching device, the method includes a primary to secondary insulation resistance test switching method, an insulation resistance test switching method for grounding between secondary windings, a transformation ratio test switching method, and excitation characteristics Switching method with polarity proofreading test and DC resistance test;

[0051] Among them, the switching method of the primary to secondary insulation resistance test is as follows: short-circuit the P1 terminal and P2 terminal of the primary winding of the transformer, and connect the first group of secondary winding switching circuits, the second group of secondary winding switching circuits, and the third secondary winding switching circuit of the switching device. The first group of secondary winding switching circuits and the four switching switches in the fourth group of secondary winding switching circuits are all switched to the I...

Embodiment 3

[0057] Embodiment 3: as Figure 1-12 Shown, a transformer handover test switching device, including a test line clamp 1, a switching device 2 and a tester 3, the test line clamp 1 is connected to the input end of the switching device 2 through a test line, and the test port of the switching device 2 is connected to the test Instrument 3, the test clamp 1 can pinch the screw of the secondary side terminal of the transformer, the switching device 2 connects and short-circuits the secondary winding of the transformer, and the tester 3 includes an insulation resistance tester, a transformation ratio tester, and a transformer Characteristic tester and DC resistance tester.

[0058] Preferably, the above-mentioned test wire clamp 1 adopts an alligator clip structure, including two clamps 101 that are mutually rotatably connected and a return spring located at the rotational connection of the two clamps 101, and two symmetrical arc-shaped occlusal jaws are arranged at the front ends ...

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PUM

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Abstract

The invention discloses a mutual inductor handover test switching device and a switching method thereof. The device comprises four sets of switching circuits, respectively a first group of secondary winding switching loop, a second group of secondary winding switching loop, a third group of secondary winding switching loop and a fourth group of secondary winding switching loop, each of the switching circuits comprises an I+ input end, an I-input end, a U+ input end, a U- input end, a first selector switch, a second selector switch, an output end E, an output end L and an output end D. The I+ input end and the U+ input end are connected to one end of a secondary winding of the transformer in parallel, the I- input end and the U- input end are connected to the other end of the secondary winding of the transformer in parallel, the I+ input end is connected to the output end D and the I- input end through a first selector switch, and the I- input end is connected to the output end E and the output end L through a second selector switch. According to the invention, the mutual inductor with no more than four groups of secondary windings can be tested, the switching loop is simple, the switching is convenient, the test during mutual inductor handover is rapidly realized, the test time is shortened, and the test efficiency is improved.

Description

technical field [0001] The invention relates to a switching device for a transformer handover test and a switching method thereof, and belongs to the technical field of transformer handover test equipment. Background technique [0002] At present, when we are testing the transformer, the test items are as follows: [0003] insulation test Characteristic test 1. Primary to secondary insulation resistance 4. Ratio 2. Primary to secondary AC withstand voltage 5. Excitation characteristics, polarity calibration, secondary winding direct resistance 3. Insulation resistance to ground between secondary windings [0004] During the test, there were two problems: [0005] First aspect: For the above test items, the position of the test line that needs to be connected to the secondary terminal is different, and the state of the short circuit of the outgoing terminal of the secondary winding is also different. It is necessary for the tester to frequ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R1/20G01R1/04G01R27/02G01R27/20G01R31/72G01R31/14
CPCG01R1/20G01R1/0416G01R27/025G01R27/205G01R27/02G01R31/14
Inventor 史纯清岑荣佳罗家猛黄俊澄易洵刘超田小林肖玉斌张健华赵鹏程罗芳刘昌宏石廷章犹永开杨大明柏文健赖罗彬吴昊杨凌典文雯禹海林余钢王江会冯明宇张莹
Owner GUIZHOU POWER GRID CO LTD
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