Forward rotation is produced when the forward reactor is saturated and the reverse reactor unsaturated, so that a positive-sequence voltage is applied to the motor. ... 2 a (Top) Simplified schematic of a single-phase primary saturable reactor control. Center a Performance curves of a single- phase saturable reactor control with a NEMA-B squirrel-cage motor. ... FORWARD REVERSE D C CONTROL WINDING This nonreversing circuit is limited to infrequent cushion starting of smallanbsp;...