dc rated switches [RE-wrenches]

Brian Sullivan brian at paloaltohardware.com
Wed May 11 12:56:15 PDT 2005


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we installed several of these old Siemens switches before the Square D 
switches at the 600VDC rating... and they were shipped to me from 
Siemens with a jumper wire installed, so that the positive conductor 
would pass through twice.


Eric Smiley wrote:

>I recently visited a grid-tie PV system where a siemens Heavy Duty Switch 
>(Type VBII) was used for the array disconnect. In a negative grounded 
>system do these switches need to have the positive conductor pass through 
>two (or more) poles of the switch in DC applications? I can't find 
>anything on the Seimens site to indicate yea or nay.
>
>
>Eric Smiley,  MASc 
>Project Leader - Technology Centre
>British Columbia Institute of Technology 
>
>NE25 - 3700 Willingdon Avenue
>Burnaby, British Columbia
>Canada V5G 3H2
>
>phone: 604.432.8657    fax: 604.436.0286
>esmiley at bcit.ca
>
>     _0
>  _/_/&
>(_)/ (_)
>
>  
>

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