<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><br class=""><div class=""><br class=""></div><div class="">Does anyone have even an crazy idea of why this engineer would say that VFD drives don’t like generators?</div><div class=""><br class=""></div><div class="">Besides the obvious, IE he doesn’t know what he’s talking about?</div><div class=""><br class=""></div><div class="">thanks everyone </div><div class=""><br class=""></div><div class="">jay</div><div class=""><br class=""></div><div class=""><br class=""><div><br class=""><blockquote type="cite" class=""><div class="">On Jul 11, 2024, at 11:22 AM, James Jarvis <<a href="mailto:jj@aprsworld.com" class="">jj@aprsworld.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div dir="auto" class=""><div class="">There should be no issues. My rule of thumb is very hard starting 15 horsepower three phase motor will start and run with a quality 30 kilowatt three-phase generator. That's across the line starting with massive current. You can program your VFD such that there is no massive surge and so a 10 horsepower on a 30 kilowatt will be absolutely no problem.</div><div class=""><br class=""></div><div data-smartmail="gmail_signature" class="">-James Jefferson Jarvis<br class="">APRS World, LLC<br class="">+1-507-454-2727<br class=""><br class="">(Sent from my phone. My apologies for spelling errors and brevity.)</div></div><br class=""><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, Jul 11, 2024, 12:07 PM jay via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org" class="">re-wrenches@lists.re-wrenches.org</a>> wrote:<br class=""></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">HI All,<br class="">
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I’m being asked to comment about running a 10hp 3 phase well centrifugal pump off of a 30kw single phase generator with a VFD drive.<br class="">
This well pump is located in a tank for fire fighting applications, so its not down a deep well meaning almost no head pressure. And the start time can be quite slow as its not supplying a house/pressure tank.<br class="">
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I”m not an expert on VFD drives, but I figure many of you are.<br class="">
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My question, based on the question from the engineer is:<br class="">
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1. is there any issue with running a VFD off of a good quality 30kw brand new Kohler turbo propane generator?<br class="">
The engineer seems to think there is but he won’t say why. <br class="">
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i can’t think of any reason at all?<br class="">
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This generator is only running this one load, the well pump.<br class="">
<br class="">
jay<br class="">
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