The fuse element of a thermal fuse and heater assembly is connected in series in the energizing circuit of the generator field winding of an electrical generating system between the field winding and the current carrying elements of an associated voltage regulator output switch. System potential is applied...http://www.google.fr/patents/US3938005?utm_source=gb-gplus-shareBrevet US3938005 - Electrical generating system overvoltage protection circuit
Electrical generating system overvoltage protection circuit
