Commutating circuit for thyristor railway track switches in supply to DC path - contains central clearing device connected to thyristor groups via clearing groups each contg. clearing thyristor and capacitor

摘要

The circuit for clearing a thyristor switch in a rectifier network connected to a three-phase and/or a d.c. bus bar contains a central clearing device connected to the bus bar which is connected to the thyristor (THS) cathodes via a bus line (FL) and diodes (FD). There is an additional braking loop line connected to the bus bar side of the clearing device. The arrangement consists pref. of two clearing groups, each with a clearing thyristor (THL) and capacitor (CL). USE/ADVANTAGE - For use in supplying d.c. current paths from three-phase or d.c. sub-stations. Circuit for forced thyristor clearing contains fewer components than conventional ones and is thus cheaper.