RE: Remote speed control of pond pump

["Dave McLaughlin" <dave_mclaughlin@xxxxxxxxxxxxx>]

Depending on your budget, you could actually use a VFD like this one
from RS
which is only 88 quid. This is for up to .25KW so well within you specs and
I am sure this will work just fine for what you want.



This has a serial RS485 MODbus interface so is up to connecting to your PC
(with adaptor) in true HA fashion.



http://uk.rs-online.com/web/search/searchBrowseAction.html?method=getProduct
<http://uk.rs-online.com/web/search/searchBrowseAction.html?method=getProduc
t&R=6108302> &R=6108302





Dave.





From: ukha_d@xxxxxxx [mailto:ukha_d@xxxxxxx] On Behalf Of
Tim Hawes
Sent: 27 February 2008 15:56
To: ukha_d@xxxxxxx
Subject: Re: [ukha_d] Remote speed control of pond pump



What's the final aim? i.e. what do you want to achieve by adjusting
the pump speed?

As someone else has said, you'd typically use a VFD (Variable
Frequency Drive) to do this, but (a) you've got a "UKHA" budget
;-)
and (b) the pump size is very small.


HTH,

Tim.

On 2/26/08, Tim <tim_munn@xxxxxxx <mailto:tim_munn%40hotmail.com>
>
wrote:
> Anyone any idea how I can control the speed of a pond pump cheaply via
> a HA system.
>
> Most dimmers available only accept resistive loads. This being
> inductive proves a problem.
>
> Pump is 35W, 230V.
>







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