ELECTRIC SHOCK PROTECTION TECHNIQUE Russian patent published in 1999 - IPC

FIELD: electrical engineering. SUBSTANCE: technique used for protecting human beings and animals against electric shock from insulated- neutral lines of up to 1000 V and from other power supply circuits involves disconnection of supply mains from load as soon as signal shaped due to electromotive force induced in human body by electromagnetic field built up in dangerous zone arrives at final unit. Presence of human being in dangerous zone is indicated by signal applied when electromotive force in final unit is closed through current-carrying circuits of load and load power supply circuits at the moment person comes in contact with live current-carrying circuits of load. EFFECT: improved reliability of protection of personnel working in dangerous zone against electric shock. 2 dwg