Wrenches, Canadian Electric Code rule 84-030 states that a direct power source connected through an inverter shall not be grounded unless the inverter AC power is separated from the supply authority system by an isolating transformer.
Our proposed system would be separated by a step up transformer to medium voltage. The Canadian code doesn't seem to address floating arrays. Anyone know of any precedents or other reasons why a floated array shouldn't be allowable in Canada? Thanks, Jerry Caldwell --- On Mon, 8/31/09, Bill Brooks <billbroo...@yahoo.com> wrote: > From: Bill Brooks <billbroo...@yahoo.com> > Subject: Re: [RE-wrenches] max PV voltage in Canada > To: "'RE-wrenches'" <re-wrenches@lists.re-wrenches.org> > Date: Monday, August 31, 2009, 8:57 PM > > > > > > > Re: [RE-wrenches] max PV voltage in Canada > > > > > > > > > > > Jerry, > > > > The Canadian requirements are > simplistic and based on the 1996 > and prior NEC. Canada is simply not keeping their code up > to date and > recognizing the fact that their western coast has > significantly milder weather > and that thin films do not have the same temperature > coefficients as > crystalline. I’m not sure they are enforcing this for all > the big thin projects > going on in Ontario however. These are engineered systems > that are not required > to follow the simplistic code requirements. > > > > Bill. > > > > > > > > > > From: > re-wrenches-boun...@lists.re-wrenches.org > [mailto:re-wrenches-boun...@lists.re-wrenches.org] On > Behalf Of Jerry > Caldwell > > Sent: Monday, August 31, 2009 2:05 PM > > To: RE-wrenches > > Subject: Re: [RE-wrenches] max PV voltage in > Canada > > > > > > > > > > > > Thank you Rob, > > So instead of using specific weather data & temperature > coefficients, they > use one derate factor for the whole country? Is the > system maximum > voltage 600V? > > > > I found the following from a presentation online, but no > quick easy answer for > my question: > > > > Voltage Rating [50-006] > > • 50-006 Voltage Rating of Photovoltaic > > Source Circuits > > Voc x 125% > > • Rated open circuit voltage > > • Temperature affects Voc of modules. > > • Based on ambient temperature of -40°C. > > > > Best, > > Jerry Caldwell > > > > > > > > > > > > > > > > From: Rob Harlan > <mendo...@mcn.org> > > To: RE-wrenches > <re-wrenches@lists.re-wrenches.org> > > Sent: Monday, August 31, 2009 12:27:15 PM > > Subject: Re: [RE-wrenches] max PV voltage in Canada > > > > > > Jerry, > > This might address what you are asking: > > Rule # 50-006 of the Canadian Electrical Code increases the > voltage rating of > the photovoltaic source circuit by 25% above the STC rated > open circuit > voltage. This would apply to the photovoltaic output > circuits as well. > > Hope that helps, > > Rob > > Rob Harlan > > Executive Director > > Solar Energy Society of Canada > > Northern Alberta Chapter > > (780) 439-5608 > > off...@solatalberta.ca > > > > > > > > > > On 8/31/09 11:41 AM, "Jerry Caldwell" > <solarcow...@yahoo.com> > wrote: > > > > > Dear Wrenches, > > > > > > Anyone know off the top of their head what the maximum > PV array voltage is > per > > > the Canadian Electric Code? Are there any > published voltage > restrictions for > > > behind the fence installations (for Ontario in > particular)? > > > > > > Cheers, > > > Jerry Caldwell > > > > > > > > > > > > > > > _______________________________________________ > > > List sponsored by Home Power magazine > > > > > > List Address: RE-wrenches@lists.re-wrenches.org > > > > > > Options & settings: > > > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > > > > > List-Archive: > > > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > > > > > List rules & etiquette: > > > www.re-wrenches.org/etiquette.htm > > > > > > Check out participant bios: > > > www.members.re-wrenches.org > > > > > > > > > > > > > > > > > > > -----Inline Attachment Follows----- > > _______________________________________________ > List sponsored by Home Power magazine > > List Address: RE-wrenches@lists.re-wrenches.org > > Options & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out participant bios: > www.members.re-wrenches.org > > _______________________________________________ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
