Patent ID: 8503150
Filing Date: 2013-08-06
Classification: H04B

Abstract:
1. An electrical interface protecting means for protecting electrical equipment from a power surge and a lightning event, comprising: a first current limiting component connected in series to a first input means and coupled to a first output means; a second current limiting component connected in series to a second input means and coupled to a second output means; a first filter circuit connected to said first and second current limiting components, that reduces electrical noise interference without attenuating a symmetrical signal impressed on said first and second input means; and a second filter circuit connected to said first and second output means, that filters an electrical noise interference impressed on said first and second outputs from propagating through said second filter, wherein said first filter circuit is a low pass filter and said low pass filter comprises a set of choke coils arranged in-phase on a magnetic core to prevent attenuation of symmetrical high frequencies and allow attenuation of asymmetrical radio frequency interference noise.