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
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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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