DSFi Power Filter

The DSFI is designed to provide secondary protection against power surges caused by external sources such as lightning strikes & substation switching as well as providing a measure of protection from surge events generated on the secondary side of the filter.The DSFI is a 3-stage protection unit utilising primary & secondary MOV protection in conjunction with a 2-stage Low-Q LC filter (i.e. 2 inductive coils) using separate differential mode & common mode circuits. The unit provides filtering of the line harmonics, noise & RF transmitters with a cut-off frequency of <1.5kHz & a minimum attenuation of >55dB to 10MHz.