Short circuit equipment of distribution transformer

Abstract

The invention relates to the technical field of electrical tests of 10kV voltage class distribution transformers, and discloses a short circuit device of a distribution transformer. The short-circuit equipment of the distribution transformer comprises a short-circuit mechanism, and the short-circuit mechanism comprises a short-circuit copper bar, a first lifting assembly and three wiring copper bars, wherein the three wiring copper bars can be respectively connected with an A-phase wiring terminal, a B-phase wiring terminal and a C-phase wiring terminal of the distribution transformer; the short-circuit copper bar can be connected to a 0-phase binding post of the distribution transformer, and the wiring copper bar is located above the short-circuit copper bar; the short-circuit copper bar is installed on the first lifting assembly, and the first lifting assembly drives the short-circuit copper bar to ascend and descend so as to control connection and disconnection of the short-circuit copper bar and the wiring copper bar. According to the invention, automatic open circuit and short circuit of the distribution transformer are realized, manual repeated wire connection and disconnection are not needed, a large amount of wire connection and disconnection time of testers is saved, the test efficiency is improved, and all electrical tests of the distribution transformer are automatically completed through one-time wire connection.

Description

technical field [0001] The invention relates to the technical field of electrical testing of 10kV voltage level distribution transformers, in particular to a short-circuiting device for distribution transformers. Background technique [0002] Current 10kV voltage level distribution transformer winding-to-ground and inter-winding DC insulation resistance measurement, absorption ratio measurement, insulation system capacitance dielectric loss factor (tanδ) measurement (for oil-immersed transformers), winding-to-ground and inter-winding capacitance measurement , winding resistance measurement, voltage ratio measurement and connection group label verification, no-load loss and no-load current measurement, short-circuit impedance and load loss measurement, externally applied withstand voltage test, induced withstand voltage test, temperature rise test, at 90% and 110 High-voltage electrical tests such as no-load loss and no-load current measurement at rated voltage, short-term ov...

AI Technical Summary

Problems solved by technology

[0002] At present, the winding-to-ground and inter-winding DC insulation resistance measurement, absorption ratio measurement, dielectric loss factor (tanδ) measurement of insulation system capacitance (for oil-immersed transformers), winding-to-ground and inter-winding capacitance measurement of current 10kV voltage level distribution transformers , winding resistance measurement, voltage ratio measurement and connection group label verification, no-load loss and no-load current measurement, short-circuit impedance and load loss measurement, externally applied withstand voltage test, induced withstand voltage test, temperature rise test, at 90% and 110 High-voltage electrical tests such as no-load loss and no-load current measurement under rated voltage, short-term overload capacity test (for oil-immersed transformers), three-phase transformer zero-sequence impedance measurement (for oil-immersed transformers), etc., require manual wiring And more than 15 times of suture removal, the test process requires a lot of manual cooperation, and the test sequence is cumbersome and complicated

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