PV Inverters module strings (Last Call) [RE-wrenches]

Wed May 9 20:39:29 PDT 2001

Wrenches:

I am working with J. Wiles to do some guidelines for safe installations.
I am also starting to do regional training seminars and would be glad to
present the info.

This is by no means comprehensive but here are a few suggestions:

600 Vdc can certainly be lethal so you need to be very careful when you play
with it.
The shock hazard is roughly equal to working in a hot 240 Vac system.
Electricians use hot gloves when working on live parts and so should you.

Use conduit on ALL exposed wire runs - code requirement.
When you are hooking up the inverter the GFDI fuse should be removed so the
array is floating.
You should also have the disconnect installed and locked in the open
position.
Make the final series connection in the middle of the array so you are not
working with big voltage differentials in close proximity to each other.
Lastly, keep one hand in your pocket so you cant touch two wires at the smae
time ;-)

If you have any questions or I can be of any further assistance please do
not hesitate to contact me.

Best regards,

John Berdner

SMA-America, Inc.
20830 Red Dog Road
Grass Valley, CA  95945
Tel: 530.273.4895
Fax: 530.274.7271

-----Original Message-----
From: blair Tump may [mailto:tump at midcoast.com]
Sent: Tuesday, May 08, 2001 6:52 PM
To: RE-wrenches at topica.com
Subject: RE: PV Inverters module strings (Last Call) [RE-wrenches]

Hey, Thats MY question???
>Bill,
>
>Who is going to train us to work on high voltage
>systems?  Does the CEC have time to conduct workshops
>on this topic?
>
>What kind of things do we need to know about working
>specifically with high voltage dc?
>
>Jerry Caldwell
>
>--- Bill Brooks <billbrooks7 at earthlink.net> wrote:
>
> > High voltage
> > systems are a new
> > ballgame. If you are not trained to work on these
> > systems, you have no
> > business doing the work. Don't forget that
> > electricity is lethal, and we
> > certainly don't want people getting hurt or worse
> > because they assumed they
> > could work on a system because they know "solar".
> >
> > Bill.
> >
> > > -----Original Message-----
> > > From: Joel Davidson
> > [mailto:joeldavidson at earthlink.net]
> > > Sent: Saturday, May 05, 2001 3:22 PM
> > > To: RE-wrenches at topica.com
> > > Subject: PV Inverters module strings (Last Call)
> > [RE-wrenches]
> > >
> > >
> > > Last call for your input on Trace Technologies
> > inverter rough (first
> > > pass) design series string count. Any changes,
> > additions or corrections?
> > >
> > > 24 modules
> > > Siemens SR100
> > > Siemens SP75
> > > BP Solar BP-585UL
> > > Kyocera KC120-1
> > > Astropower APX-75
> > > Astropower AP-120
> > >
> > > 12 modules
> > > BP Solar BP2150
> > > Photowatt PW1000-95
> > >
> > > ? modules
> > > ASE Americas ASE-300
> > >
> > > Do not use
> > > Energy Photovoltaics EPV-40
> > > Solarex MST-43
> > > Solarex MSX-120
> > > United Solar SSR-128
> > > United Solar US-64
> > >
> > > - - - -
> > > To send a message: RE-wrenches at topica.com
> > >
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