Rather than that, I leave a convenient pair of connectors disconnected, overlap
them by a few inches, and wrap them together with red tape. It is a pseudo
lockout. Everyone on my crew knows to ask and get explicit confirmation before
joining connectors wrapped like that.
I have to confess that
Short-circuiting should be OK for crystalline cells, but some thin film
manufacturers ask you not to do this. On the jumper-cutting, I agree
with the others that you probably shouldn't create arcs just for fun!
On 2012/9/17 23:50, Mark Frye wrote:
Wrenches,
True or False: In a nominal sort of
Mark,
Shorting the string should not be an issue.
Unless you work at night, obviously there will be an arc when you cut the
jumper, so remember to cover the whole string with an opaque covering
beforehand I think I remember reading that somewhere?!?!
Or just be careful, try to do it when the irrad
Mark, Think about this: the Isc current is only slightly higher than Imp.
Picture a series DC circuit. Both short circuit and operating current are loads
on the PV module(s). An indefinite short will not be a problem any more than
operating the module at higher than 1000W/M/2. Neither will there
Wrenches,
True or False: In a nominal sort of grid tied situation with string Voc
at about 300 VDC and Isc at about 6 or 7 amps..It is OK to install
modules on a roof in the sun and short the pos and neg together
indefinitely.
In other words modules can handle operating at Isc continuous
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