In addition, an SPD is supposed to keep any input lines to the equipment
from breaking over
the insulation. For the Classic, the hipot voltage is over 2000 volts
to chassis (gnd).
If the SPDs are grounded and connected well they should be able to do
their job unless maybe
it is a direct strike and then it is not so easy to visualize.
Anyway, this is why SPD voltages are normally higher than the usual
maximum system
operating voltages. But a good ground is essential. Even a seemingly
far off lightning
strike can cause high electric fields near an antenna or PV array or
tower system but.
boB
On 7/4/2014 11:20 AM, b...@midnitesolar.com wrote:
The SPD will (or, should), "clamp" the input voltages, both positive
and negative to ground at the
MOV voltage rating during a lightning strike. The SPD 300 starts at
about 500 volts on each leg
of the SPD. The 600 SPD is higher voltage of course. Since, on the
PV input side, the MOVs
appear to be in series, an SPD 300 should clamp the plus and minus
input to twice 500V or,
about 100 volts which should not do anything to a charge controller
operating up to 250
volts or even higher so I am not sire what happened here. We'll have
to try to do an autopsy
on the controller if possible on this one.
We're still looking into the optimizer interaction issue. It doesn't
really make any sense as
to why they should "fight" though. We have talked with Tigo on this
but nothing definitive
yet as to why.
Thanks and happy 4th of July,
boB
On 7/4/2014 7:51 AM, d...@foxfire-energy.com wrote:
Anyone else having problems with Midnight Classics Flaming out
(Literally)? We know they don't play nice with Tigo Optimizers.
Wondering if a Midnight SPD might also look like a short to a classic
when it clamps. only affected two of the four controllers. Two seemed
to be un affected, one tripped off and reset, Not only did the last
one let the smoke out, but went Dali in the process. Painted up the
wall and everything.Suggestions? Thanks db
Dan Brown
Foxfire Energy Corp.
Renewable Energy Systems
(802)-483-2564
www.Foxfire-Energy.com <http://www.Foxfire-Energy.com>
NABCEP #092907-44
-------- Original Message --------
Subject: Re: [RE-wrenches] 2014 NEC
From: Phil Forest <pfor...@southmountain.com
<mailto:pfor...@southmountain.com>>
Date: Tue, May 20, 2014 1:25 pm
To: RE-wrenches <re-wrenches@lists.re-wrenches.org
<mailto:re-wrenches@lists.re-wrenches.org>>
Will,
No problems with inspectors for us in MA, regarding rapid
shutdown, since we recently switched to using SolarEdge central
inverters with optimizer under each module, for roof mounted
installs.
So far so good. They seem well made and engineered. Tip: you have
to enable the arc fault protection when commissioning, ships
disabled.
Phil Forest
South Mountain Company
On May 20, 2014, at 10:59 AM, Will White
<william.wh...@rgsenergy.com
<mailto:william.wh...@rgsenergy.com>> wrote:
Wrenches,
Is anyone else having problems with inspectors and the 2014
NEC? In Mass we're having all kinds of issues with inspectors
requiring/allowing an array of different things for 690.12 rapid
shut down ranging from roof top disconnects, disconnects on the
side of a house 20' up, disconnects in attics, or only
disconnects that can be activated on the ground. It varies
between inspectors.
We're also having problems with one inspector requiring arc
fault breakers on Enphase even though there are no UL listed arc
fault breakers that can be back fed or he wants us to run the
trunk cable in a raceway.
It's getting very difficult to install in Mass.
Thanks,
Will
*Will White*
Operations Manager - New England
RGS Energy
64 Main St. |Montpelier, VT 05602
tel 802.223.7804 |mobile 802.234.3167 |fax 802.223.8980
*RGSEnergy.com <http://www.rgsenergy.com/> **|
william.wh...@rgsenergy.com <mailto:william.wh...@rgsenergy.com> *
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