There is also a list of fatal accidents, due to electricity at up to 250 V to earth, for the years 1953 to 1957-the total ... 12 references. S.Woodhouse REGULATION 621.316.71/72 1561 STUDY OF AN ENGINE-GENERATOR CONTROL SYSTEM. ... conduction period by a quenching circuit which uses an auxiliary s.c.r. A C35D s.c.r. on 250 volts, nominal current 12 A, ... CASCADED INDUCTION MOTOR AND D.C. MACHINE - AN ECONOMICAL SOLUTION FOR THE SPEED CONTROL OFanbsp;...