变压器套管安装后C_2电容介损的一种测量方法

The Measuring Method for Capacitance and Dielectric Loss of Bushing C_2 after Installation

电容和介质损耗测量能够有效的发现电气设备的绝缘缺陷,电容式套管的末屏对地的电容C2包含套管的固体绝缘并且包含部分油纸绝缘,因此测量套管的末屏对地电容和介损确认套管的绝缘状态有重要意义。套管安装后,套管的电容C2和套管电容C1以及变压器本体电容无法隔离,本文使用带有屏蔽功能的电容介损测试仪建立新的测量电路,可以准确的测量安装在变压器上套管的末屏电容介损。

Capacitance and dielectric loss measuring can effectively detect the insulation flaw of electric equipment. There is some solid and oil-paper insulation between the test terminal and flange of the bushing, so it is very necessary to measure this capacitance and dielectric loss. After installation the capacitance C2 of bushing test terminal is connected to the capacitance C1 of bushing and the transformer This paper sets up a new measuring circuit with dielectric loss measuring equipment which has a shield terminal, and the capacitance and dielectric loss of bushing C2 can be measured accurately.