A thyristor converter control system comprising a voltage detector for detecting the thyristor voltage and a detector output suppressing circuit provided at the output of the voltage detector. The detector output suppressing circuit operates to detect an erroneous output of the voltage detector that it provides a voltage-presence signal while it must provide a voltage-absence signal, and cuts off the output of the voltage detector upon detecting the erroneous output from the voltage detector.
FALSE RECOVERY DETECTION CIRCUIT FOR PARALLEL OR SERIAL STRINGS OF THYRISTORS