THYRISTORS FOR EFFECTING TAP CHANGING ON TRANSFORMERS AND INCLUDING CURRENT LIMITING RESISTORS AND STANDBY TRIGGER SYSTEM

摘要

Tap-changing means for tapped transformers include thyristors for effecting tap-changes. Additional tap-changing means include electric fuses, current-limiting resistors and a relay-controlled standby thyristor trigger system prevent the occurrence of dangerous short-circuit currents in case of malfunction of the principal thyristor trigger means.