Patent ID: 8164876
Filing Date: 2012-04-24
Classification: H02H

Abstract:
1. A transient voltage protection circuit, wherein the transient voltage protect circuit protects a load from transient voltages, the transient voltage protection circuit comprising: first and second input terminals, wherein the first and second input terminals receive an alternating current (AC) input voltage; first and second output terminals, wherein the first and second output terminals couple an AC output voltage from the circuit to the load; a series combination of a thyristor surge protection device (TSPD), a resistor and a parallel combination of a transorb with a capacitor, the series combination coupled in parallel with the first and second output terminals; and a fuse coupled between the first input terminal and the series combination; the TSPD and the transorb being configured to enter a transient mode upon application of a transient voltage to the circuit, to shunt current from the load and provide an AC output voltage less than the transient voltage without opening the fuse.