[RE-wrenches] Whisper 500 service

Ross Taylor wind.trainer at gmail.com
Fri Sep 20 11:32:07 PDT 2013


Hi Nathan,

I worked for SWWP for years and would be happy to speak with you and answer
any questions I can.

Definitely check the furling return spring and make sure it's not broken.
 It should be about 4.5-inches long.  It's a plastic coated steel spring
and when the coating cracks (especially in coastal environments) the spring
corrodes and breaks.  With a broken spring, the turbine can remain balanced
in furl.

Also check the shock absorber and make sure the shaft isn't corroded and
that it moves freely in both directions.  It's a dual-speed racing shock,
moving faster in one direction (extension) than the other (compression).

Verify that the phase-to-phase output voltages are similar.  You'll have
three measurements and they should be close.

Of course, also check the bearings and fasteners as well.  That's a given,
sorry to state the obvious.  While you're there, also make sure the
original installer put the blades on right.  The four-bolt pattern is
symmetrical, so it's possible to install the blades backwards.  Most folks
not familiar with wind turbines would put the blades on with the curved
side facing the wind...

And, finally, see if the customer can provide you with any output data.  If
it's performing well, that's a good sign the blades were put on right and
the voltages were configured correctly.  But, if they called you due to low
output concerns, then it might be wise to check the voltage settings.  The
500 can be set up for 24, 36, or 48 volt systems.  There are three things
to change and if the original installer skipped one of them it can either
lead to damage or low output, depending upon what was done.

If you have more questions or need to bounce anything off me, feel free to
email me directly.  wind.trainer at gmail.com

Best wishes,

Ross
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