Feedback from City of Berkeley [RE-wrenches]

[William Miller]

<x-flowed>

Mark:

I agree with the requirement below for the Fronius, but not for 
Xantrex.  99.99% of failures will be in the electronics package, and with 
the Xantrex, you can de-energize the electronics to remove them safely.

If the logic is that you need a disconnect to de-energize the active 
equipment, I agree.  If you need a disconnect to de-energize the 
disconnect, then I disagree.  (The logic for the latter is flawed:  if you 
need a disconnect to protect you if you have to work on the disconnect, 
then you need a disconnect to de-energize that disconnect, etc, etc.  The 
logic is faulty because it is circular.)

William Miller


At 06:15 PM 2/23/2007, you wrote:

>2) You got to have an external safety switch to serve as the PV DC
>Disconnect, mounted next to the inverter, even if you are using a Xantrex or
>Fronius with integrated disconnects.


- - - -
To send a message: RE-wrenches at topica.com

Archive of previous messages: http://lists.topica.com/lists/RE-wrenches/read

List rules & how to change your email address: www.mrsharkey.com/wrenches/etiquette.php

Check out participant bios: www.mrsharkey.com/wrenches/

Hosted by Home Power magazine

Moderator: michael.welch at homepower.com
--^----------------------------------------------------------------
This email was sent to: michael.welch at homepower.com

EASY UNSUBSCRIBE click here: http://topica.com/u/?bz8Qcs.bz9JC9.bWljaGFl
Or send an email to: RE-wrenches-unsubscribe at topica.com

For Topica's complete suite of email marketing solutions visit:
http://www.topica.com/?p=TEXFOOTER
--^----------------------------------------------------------------



</x-flowed>