[RFI] Ham App for 3-Phase Power Line Filter?

CR ka5s at earthlink.net
Sat Feb 7 19:21:53 EST 2015


On 2/7/2015 12:18 PM, qrv at kd4e.com wrote:
> Would this just-posted on BGMicro 440/250vac power line filter
> resolve any problems in a Ham shack?
>
> Power Line Filter 3Phase 36Amp Neutral Lines
I recall seeing a formula for derating a 3-phase filter for single-phase 
use; divide the current rating by the square root of three.  I have a 
200 A 3-phase Y that's UL rated for 480, and I'm tempted to filter the 
whole house -- after the main fuses. Heh.

I'll probably just use a smaller one on the branch circuit that runs the 
shack; the Big Guys are labelled at 2A of leakage current -- and the new 
Smart Meter might bill for reactive VA.

Cortland


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