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The MSFi is designed to provide point-of-entry protection against
power surges caused by external sources such as lightning
strikes and substation switching as well as providing a measure
of protection from surge events generated on the secondary side
of the filter.
The MSFi is a 3-stage protection unit utilising primary and
secondary MOV protection in conjunction with a Low-Q LC filter.
In addition, the unit also provide filtering of the line
harmonics, noise and RF transmitters with a cut-off frequency of
<10kHz and a minimum attenuation of 40dB above 1MHz. Special
care has been taken in the design of the filter to minimise
ringing caused by light loads, surge diverter operation and
inductive load back-EMF.
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