Safety adapter for ungrounded electrical socket

摘要: A protection device (20) for use in conjunction with an electrical appliance (26) having electrically conductive outer casing (27) and which protects against the becoming 'live' regardless of state a ground connection (GND) associated socket (17) to is connected. virtual (25) floating respect socket, coupled instead socket. differential comparator circuit (60) compares fraction voltage between live neutral connections at appliance, producing fault signal if difference two voltages exceeds predetermined threshold. main feeder interruption (38) operatively circuit, being responsive opening switching (36, 37) connected least one connections.