It is a thyristor control card for phase angle regulation.
With a minimum of external components, it allows both AC control and control of a bridge rectifier.
The most outstanding features are:
– Controls up to 6 thyristors, in W3C or B6C connection
– 3x400V power supply without neutral.
– Automatic phase balancing.
– 60mV shunt signal input.
– Voltage and current regulation.
– Auxiliary power supply outputs for instruments.