PT secondary voltage detection connection device for relay protection test

Abstract

The invention discloses a PT secondary voltage detection connection device for a relay protection test and belongs to the field of relay protection tools in electrical engineering. The device comprises a suction fixing device and a lead connection device, the suction fixing device is used for making the device connected with a high-voltage cabinet, and the lead connection device is electrically connected with a line pressing screw of an air switch in the high-voltage cabinet. By applying the device, the problems are solved that in the relay protection voltage test process, when the air switchis connected with a test line, supporting of a specially-assigned person is needed, or due to the complex work of the test completed through line detachment and line connection, the working efficiencyis low. The PT secondary voltage detection connection device has the advantages that connection is conveniently conducted, the labor is saved, and original arrangement of the high-voltage cabinet isnot damaged.

Description

technical field [0001] The invention relates to equipment for relay protection tests in electrical engineering, in particular to a PT secondary voltage detection connection device for relay protection tests. Background technique [0002] After the construction of the substation or power distribution station is completed, the electrical test is a very necessary part of the work before the electrical equipment is put into operation. Electrical tests generally include high-voltage withstand voltage tests, relay protection tests, etc. In the relay protection test, it is often necessary to apply voltage or current to the electrical equipment to check whether the relay protection device is operating normally. Since the secondary wiring has been completely wired after the construction is completed, the voltage will be applied to the small busbar on the top of the large high-voltage cabinet during the voltage protection test. In the actual test, the small busbar and the voltage tra...

AI Technical Summary

Problems solved by technology

In the test, there will be the following problems: 1. The banana plug of the test line is too thick and the space of the secondary chamber of the high-voltage cabinet is small, so it is not convenient to directly insert into the pressure hole of the air switch for fixed connection; In order to make the banana terminal contact the crimping screw of the air switch, and in this case, there will be poor contact, because the hand will loosen due to fatigue for a long time, which will affect the test

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