ULTRA HIGH FREQUENCY SENSOR FOR SENSING PARTIAL DISCHARGES IN OIL FILLED TRANSFORMER

摘要

An ultra high frequency sensor (1) for sensing partial discharges in oil filled transformer (12). The sensor comprises a tubular housing (2) extending into the transformer through the drain valve (13) thereof and mounted to the drain valve body leak tight. The sensor comprises a sensing end (3) made of an electrically insulating material and having an antenna (5) located therein and further having a first stopper (6) made of electrically insulating material at the tip of the sensing end. The sensor further comprises a probe terminal (7) located at the tail end thereof and connected to the antenna by a cable (8) extending through the tubular housing. The tail end further has a handle (9) and a second stopper (10).