Intermediate transformer for multiple voltages output test

Abstract

The invention relates to an intermediate transformer for a multiple voltages output test. The intermediate transformer comprises a high tension coil and a low tension coil. The high tension coil is divided into four sections in axial distribution so as to be led out. The four sections led out are connected through a serial-parallel change-over switch. The head and tail ends of the high tension coil are connected into a Y-delta change-over switch through the serial-parallel change-over switch. Nine terminals are led out from the head end of the high tension coil and the head and tail ends of the low tension coil. Through adoption of the intermediate transformer, high voltage adjustment is realized, twelve different transformation ratio combinations are realized, and the quantity of output terminals is sharply reduced; the switch is used for adjusting so as to output the voltage, so that the operation is convenient, wiring quantity and wiring error rate are reduced; occupied space of the whole transformer is reduced, the use ratio of the test site is increased, the quantity of electrified terminals is greatly reduced, and potential safety hazard is lowered.

Description

technical field [0001] The invention relates to an intermediate transformer for supplying power to a test circuit, and belongs to the technical field of intermediate transformers. Background technique [0002] The function of the test intermediate transformer is to supply power to the test circuit. With the diversification of transformer product types and performance parameters, and in response to the national policy of energy saving, consumption reduction, cost reduction and efficiency increase. It has become the intention of most transformer manufacturers to use one test transformer to meet various test purposes. The structural schematic diagram and internal winding arrangement of the traditional test intermediate transformer are as follows: figure 1 , figure 2 and image 3 As shown, all the windings are led out, and then through serial-to-parallel conversion, Y-△ (star-delta) conversion to achieve different output voltages, which makes the use of the entire intermedi...

AI Technical Summary

Problems solved by technology

The structural schematic diagram and internal winding arrangement of the traditional test intermediate transformer are as follows: figure 1 , figure 2 and image 3 As shown, all the windings are led out, and then through serial-to-parallel conversion, Y-△ (star-delta) conversion to achieve different output voltages, which makes the use of the entire intermediate transformer very complicated, not beautiful, and takes up big space

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