Patent ID: 7184252

Claim:
A surge protector for an alternating current service, said service including at least an incoming hot line and an incoming neutral line, which comprises: (a.) an input transformer with input connection means for connection to said incoming hot line; (b.) a series connected transformer with input connection means for connection to said incoming hot line downstream from the input transformer secondary winding, and connected in series to a non-linear surge suppression circuit, and therefore having a gross output connection to said non linear surge suppression circuit, and further having a low impedance signal input to the secondary of the series connected transformer from said non-linear surge suppression circuit, and having a surge cancelled hot line output connection means; and, (c.) said non-linear surge suppression circuit having an input connection means from said input transformer secondary winding, and being connected with said gross output connection means of said transformer, and having means for returning a suppressed surge signal to said transformer secondary, or tap and having an input transformer secondary winding output connection means; wherein the non-linear surge suppression circuit limits the surge voltage at a voltage above the peak of the power wave voltage, and the series connected transformer senses the surge current and the transformer secondary supplies a signal of opposite phase to the incoming surge at the output after the clamping circuit, which effectively cancels the residual surge voltage, rendering the residual surge benign at the output.