DEVICE FOR OVERLOAD PROTECTION Russian patent published in 1995 - IPC

FIELD: radio engineering. SUBSTANCE: device has gate with two outputs, first output is terminal 10 for connection of controlled object 5; second output is connected to circuit 4 that is equivalent to controlled object. In addition device has second comparison circuit 4, which first input is connected to terminal 11 for connection to controlled object; second output of circuit 4 is connected to unit which serves for generation of signal for permission of output of OR gate 8. First input of OR gate 8 is connected to first fault detection unit 3; second input of OR gate 8 is connected to second fault detection unit 7; output of OR gate 8 is connected to control input of gate 1 through flip-flop 9, which second input serves as input for cancel prohibition signal. EFFECT: increased reliability of protection in case of fault in signal source or in load. 1 dwg