Patent ID: 8335067
Filing Date: 2012-12-18
Classification: H02H

Abstract:
1. A voltage surge and overvoltage protection system, comprising: at least one first voltage clamping device configured to clamp a voltage of an input power voltage applied to an electrical load to a predetermined first voltage clamping level; at least one second voltage clamping device configured to clamp the voltage applied to the electrical load to a predetermined second voltage claiming level; a series inductance coupled between the first and second voltage clamping devices; a first selectable actuatable switch connected between the series inductance and the electrical load; a second selectively actuatable switch in parallel with the first switch for connecting an impedance component between the series inductance and the electrical load; and a switch control circuit that controls actuation of the first switch and the second switch in a plurality of predetermined sequences, each of the plurality of predetermined sequences corresponding to one of a plurality of predetermined operating conditions on the input power voltage.