A procedure and a circuit for identifying and switching off...
A protecting apparatus
A protection device using field effect transistors
A protective relay-based monitoring system of dc power...
A relay-to-relay direct communication system and method in a...
A self-excited oscillator type switch power supply with...
A surge suppression network responsive to the rate of change...
A three stage power conditioning circuit
A transformer arrangement
A-c energizing system with static interrupter
A-c voltage detector
A-c voltage detector
A.c. electricity power supply system and methods of and...
A.c. power controller with short circuit and overload...
A.c. power cut-off device
Abnormal battery cell voltage detection circuitry
Ac generator system including differential protection of...
Ac power backfeed protection based on phase shift
Ac power backfeed protection based on voltage
Ac power controller