Insulated obturator for measuring electromagnetic potential transformer

Abstract

The invention discloses an insulated obturator for measuring an electromagnetic potential transformer, comprising a sealed test container, a vacuum pump, an N2 gas storage tank and an SF6 gas storage tank, wherein the vacuum pump, the N2 gas storage tank and the SF6 gas storage tank are respectively connected and communicated with the test container via a gas transmission branch pipe and a gas transmission header pipe; the gas transmission header pipe is provided with a gas-pressure meter; a fixed bracket is arranged in the test container; and the test container is in a butt-joint halves structure pressed and sealed by a hand vice. The device can be used for testing a GIS (gas insulated substation) electromagnetic potential transformer of voltage of 110KV, 220KV and the like before assembling, benefits the timely defect finding, and is generally matched with the GIS electromagnetic potential transformer devices of different voltage levels and models for test, therefore, the invention overcomes the defect that the obturator is required to be respectively processed with respect to the factory, the model and the voltage level, and the obturator has the advantages of convenience and rapidness for operation, accuracy for test, reliable performance and the like.

Description

technical field [0001] The invention belongs to the technical field of power system detection, in particular to an insulating and sealing device for testing electromagnetic voltage transformers. Background technique [0002] With the continuous advancement of power grid technology, GIS, or gas-insulated combined electrical appliances, are more and more widely used in substations. However, when the electromagnetic voltage transformer is used for the on-site handover test, because the insulation cannot meet the high voltage requirements, it cannot complete the test of the excitation characteristics required by the "Electrical Equipment Installation Engineering Electrical Equipment Handover Test Standard", which affects the operation quality of the power grid. In the prior art, there is a technology of using a closed container to fill SF6 gas, and then install the electromagnetic voltage transformer after passing the test in the insulated state. Although this technology can be...

AI Technical Summary

Problems solved by technology

Although this technology can better solve the problem of testing the excitation characteristics of electromagnetic voltage transformers, since the joint surface of the airtight container is connected by flanges and tightly packed with multiple bolts, this structure can achieve accurate detection. purpose, but in the process of testing, it is not only cumbersome to disassemble and compress, but also labor-intensive, and the test efficiency is low, and the versatility of the device is poor. It is impossible to perform electromagnetic voltage mutual induction of various specifications, models and voltage levels in one set of devices. For testing with different devices, airtight containers of different sizes need to be processed separately, resulting in a lot of test material consumption and high test costs

Images