What is an EMI / RFI filter? An EMI RFI filter is designed to be added to your incoming power line (in series). It removes unwanted signals and noise from the outside power grid. The filter is selected by maximum current usually the rating of the incoming line. The higher the current the larger and more costly the filter.
So, why do you need an EMI / RFI filter? If you use sensitive equipment like computers, phone systems or hospital diagnostic equipment, the filter will remove noise that may affect the performance of this equipment. For example, a dial up phone line may connect at a slower rate if there is noise on the data lines. It may not make it fail but you may not know noise is causing your modem to connect at a slower speed. EMI RFI Filters are easy to install for most qualified technicians so there is really not a good excuse not have one.
Will an EMI RFI filter protect your equipment from lightning? The filter will not; however there is an option for a surge protector to stop big surges
How much power does an EMI RFI filter use? The filter itself is passive. However there is a small drain of power. Total is about 10ma. This is very small and will not affect your electric bill. The most common question I get is "I have 3 Phase 408 vac. Can the filter work on this?" The answer is "yes!" The filters are designed for up to 600 vac.
Most EMI RFI filters are over designed and will work fine when overstressed or extreme environments. In short, they are of the highest quality.
Paul Alessandrini is an experienced MRI-RFI filter technician. Additional information regarding Fil-coils MRI, Tempest, and HEMP filters can be found at http://www.custompowersystem.com |
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