REGIMURI TRANZITORII INDUSE DE MANEVRELE DIN CIRCUITELEPRIMARE ?N SECUNDARELE TRANSFORMATOARELOR DEM?SURARE

摘要

The paper present a study about the transient signal induced in secondary lines of measurementrntransformers by the opening and closing operations of breakers and disconnectors in the high voltage line ofrnpower stations. There are presented the tests made in three power stations with 400kV and 220kV highrnvoltage line using, for data acquisition, two 4-channel digital oscilloscopes (Tektronix TDS 420), connectedrnto PC by GPIB(IEEE 488) interface. The registered data are presented and commented in order to obtainrnconclusion about voltage stress of digital equipment connected in the secondary line of measurementrntransformers in order to choose the appropriate methods for its protection.