For supplying high inductances such as the fields of large DC or synchronous motors or solenoids, the gating unit is switched to long pulses via a parameter setting. Long pulses ensure reliable triggering of thyristors for high-inductance equipment. In such cases, the converter armature circuit (terminals 1C1/1D1) is not used to supply DC motors, but large-scale field windings

Note

An external snubber circuit (e.g. resistor or block varistor) must be provided at the DC voltage output of the converter.