Contact finger pressure test instrument of high-voltage isolation switch

Abstract

The invention discloses a contact finger pressure test instrument of a high-voltage isolation switch. The contact finger pressure test instrument comprises a mould which is matched with a contact of the high-voltage isolation switch in the aspect of shape during the normal use, a contact type pressure sensor, an acquisition and amplification circuit, a singlechip and a display, wherein the contact type pressure sensor is detachably embedded in the mould and one end is exposed out of the mould; a signal output end of the contact type pressure sensor is connected with a signal input end of the acquisition and amplification circuit through an RS 232 data line; a signal output end of the acquisition and amplification circuit is connected with a signal input end of an A / D (Analog / Digital) conversion circuit in the singlechip; a signal output end of the A / D conversion circuit in the singlechip is connected with a signal input end of a processor in the singlechip; and a signal output end of the processor in the singlechip is connected with the display. According to the contact finger pressure test instrument, the contact finger pressure of the high-voltage isolation switch can be tested, so that the contact heating problem of the high-voltage isolation switch due to insufficient contact finger pressure of the high-voltage isolation switch can be solved in advance; and the contact finger pressure test instrument has the advantages of convenience in test, high accuracy and visualized display.

Description

technical field [0001] The invention relates to a testing instrument for testing the finger pressure of a high-voltage isolating switch. Background technique [0002] At present, the heating problem of high-voltage isolating switch contacts will lead to melting of the hot parts of the contacts, increasing the number of power outages and affecting the operation structure of the power grid. After the analysis and statistics of the heating problems of the existing high-voltage isolating switches, it is found that the heating of the contact fingers of the isolating switch accounts for more than 80% of the total heating problems, and the contact heating caused by insufficient contact pressure of the contact parts of the isolating switch accounts for more than 80% of the total heating problems. To more than 60% of the heating defects of the isolating switch fingers, therefore, the key to reducing the heating of the high-voltage isolating switch is to ensure the pressure of the iso...

AI Technical Summary

Problems solved by technology

At present, only by testing the contact resistance of the knife switch circuit to judge the contact condition of the contact part, roughly judge whether the pressure of the contact finger of the isolating switch is qualified, lack of preventive monitoring means

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