[RE-wrenches] SWWP Whisper 200 - Looking for a Short to Ground

Tom Duffy Tom at thesolar.biz
Tue Oct 15 07:03:18 PDT 2013


Matt

Checking a stator is not easy without the proper equipment. My stator tester uses 120VAC to check phases and phase to ground. Generally an Ohm meter will not check the resistance right for the phases. 

The best way for you would be to take the stator to an auto electric rebuilder and have them check it.

Kind regards

Tom Duffy
Senior Solar Design Engineer

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-----Original Message-----
From: re-wrenches-bounces at lists.re-wrenches.org [mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Matt Sherald
Sent: Monday, October 14, 2013 7:39 PM
To: re-wrenches at lists.re-wrenches.org
Subject: [RE-wrenches] SWWP Whisper 200 - Looking for a Short to Ground

I've got a Whisper that's not performing and I'm putting this out to the group in hopes that someone has had a similiar dilemma.

My line to line voltage measurements are the same between the three phases.  However, my line to ground measurements are consistent across only two of the phase-ground combinations.  The third phase appears to be shorting to ground.

I had the tower down and took the machine off to check the split bolt connections at the top of the tower for wear/rubbing.  The down tower wiring checks out.  I opened the wire access on the machine to double check wire insulation and the wire nut connections.  I unbolted the slip rings and checked for any sign of a smoking gun there.  Nothing jumped out at me during the inspection and I'm curious if it might be in the spinner assembly.

With no tech support to turn to I am hoping that someone in the Wrench community might have had a similiar conundrum at one time.  I'd appreciate hearing from you if you have.

Many thanks in advance. 



Matt Sherald 
PIMBY: Power In My BackYard 
NABCEP Certified Solar PV Installer® 
matt at getpimby.com 
(304) 704-5943 

www.getpimby.blogspot.com 
www.getpimby.com 

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