Patent ID: 6788509
Filing Date: 2004-09-07
Classification: H02H

Abstract:
An apparatus for protection of electronic circuits comprising :a first and a second power supply; a first and a second load associated with the first and the second power supply; a monitoring circuit for monitoring at least one of the first load, the second load, the first power supply and the second power supply; a first switch, associated with at least one of the power supplies for switching on and off the at least one power supply, a second switch for primary side fault disconnection of the at least one power supply; and a second switch for primary-side fault disconnection of the at least one power supply, an optocoupler with at least an optical transmitter; and a first resistor coupled with a controllable diode, the first resistor having a resistance such that a holding current holds the controllable diode active if the optical transmitter is switched off.