Peter,
All well and good per IEC 62109 however the 800lb gorilla NRTL
assessed the PV DC current monitor assembly (a piece of measurment equipment)
to be OV CAT IV when it was assessed for certification.
The manufacturer grumbled somewhat (since it wasn't designed
for that OV category) but agreed that it was probably appropriate, as did I.
:>) br, Pete
Peter E Perkins, PE
Principal Product Safety Engineer
PO Box 23427
Tigard, ORe 97281-3427
503/452-1201 fone/fax
[email protected]
From: Peter Tarver [mailto:[email protected]]
Sent: Friday, August 08, 2014 3:47 PM
To: [email protected]
Subject: Re: [PSES] question with regard of inverter
IEC 62109-1 considers “PV circuits in general” to be OVCII.
Regards,
Peter Tarver
From: McDiarmid, Ralph [mailto:[email protected]]
Sent: Friday, August 08, 2014 13:57
To: [email protected]
Subject: Re: [PSES] question with regard of inverter
My understanding as well, namely, OV categorization in power distribution is
based on indirect (near-by) lightning strikes.
_______________________________________________________________________________
Ralph McDiarmid | Schneider Electric | Solar Business | CANADA |
Regulatory Compliance Engineering
From:
John Woodgate <[email protected]>
To:
[email protected],
Date:
08/06/2014 01:53 PM
Subject:
Re: [PSES] question with regard of inverter
_____
In message <[email protected]>, dated Wed, 6 Aug 2014, Richard
Nute <[email protected]> writes:
>. Your solar cell DC source is not
>subject to load switching, but is subject to a direct lightning
>strike.
>Your DC OVC due to load switching is zero, and your OVC due to
>lightning is beyond OVC IV.
Is resistance to a direct lighting strike required of civilian products?
I though that only 'indirect strike' was to be resisted, and OVC IV was
based on that.
--
OOO - Own Opinions Only. With best wishes. See www.jmwa.demon.co.uk
Quid faciamus nisi sit?
John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK
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