[RFI] RFI from variable speed swimming pool pumps

[James Jordan]

Wow! That’s CA. We’re on residential time of use here in NC and average for June was $.09 kWh or about 20% of VP5 rate! I’ll deal with the RFI if I can just get my bill down some. 

Sent from my iPhone

> On Jul 2, 2018, at 2:10 PM, Steve Kurtzman <stevew7sjk at gmail.com> wrote:
> 
> Funny you should ask... in San Diego it can be as high as $0.55/kWh depending on season, rate schedule, time of day and overall usage.  But I get your point.  New commercial buildings commonly use VFDs for HVAC and pumps, to save energy.
> 
> Steve
> sparkie001 at pobox.com
> stevew7sjk at gmail.com
> www.facebook.com/imetsteve
> 
> 
> 
> 
>> On Mon, Jul 2, 2018 at 10:54 AM James Jordan <k4qpl2 at gmail.com> wrote:
>> Good question. Thanks but the power situation in Turks & Caicos is very different from USA. Electricity is about $.48 PER KILOWATT HOUR! What’s yours? Pool alone presently costs almost $300/month for power. A two speed doesn’t have enough flexibility to optimize energy usage while providing adequate circulation and filtering. The new VS drives are also inherently more efficient so I’ll just have to deal with any RFI that results. Most of our renters are not hams in any event and if push comes to shove we’ll switch off or to the backup fixed speed pump during a contest etc. Hopefully line filters and ferrites will keep things manageable. 
>> 73,
>> Jim K4QPL VP5M 
>> 
>> Sent from my iPhone
>> 
>> > On Jul 2, 2018, at 12:53 PM, Jim Brown <jim at audiosystemsgroup.com> wrote:
>> > 
>> > Why use variable speed controller at all?  Most systems that use motor controllers have 2-speed controllers as "standard equipment" and offer variable speed as an upgrade.  I suggest that you try to avoid variable speed.
>> > 
>> > 73, Jim K9YC
>> > 
>> >> On 7/1/2018 11:25 AM, James Jordan wrote:
>> >> Other comments or suggestions?
>> > 
>> > 
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