Allan Sindelar wrote:
Dan,
My understanding is that CBI breakers aren't based on a temperature-related
mechanical action, but a "magnetic-hydraulic" function. I recall that this
was marketed (by Outback? Robin?) as superior to thermal-trip mechanisms as
it was not prone to heat-induced nuisance t
Hello Allan,
CBI makes both types of breakers. My explanation covers one side of that
equation. If the breakers in question are in fact the mag-hyd .. you're
correct - they're less prone to heat-variance in the trip current than the
thermal types.
Dan
--- On Tue, 7/28/09, Allan Sindelar
Dan,
My understanding is that CBI breakers aren't based on a temperature-related
mechanical action, but a "magnetic-hydraulic" function. I recall that this
was marketed (by Outback? Robin?) as superior to thermal-trip mechanisms as
it was not prone to heat-induced nuisance tripping. boB can probabl
boB,
The Mitsubishi system is just two parallel strings. The combiner was
planned for future expansion. It was last fall that I had trouble with
those so I don't remember if they were "off" or "tripped". The system
with Evergreen panels is just three strings; it is possible but not
likely
Wrenches,
An assembly of thoughts:
Circuit breakers operate on a bi-metallic temperature-related mechanical
action. They are rated to hold a specific current at a specific ambient
temperature. If the ambient temperature exceeds the breaker specification for
a given current, the breaker will
HI Allan,
they are designed to use a POZI drive bit I believe, which is
slightly different than a phillips but works much better.
I also use my large straight tip on my 8 in 1 screw driver.
jay
peltz power
On Jul 27, 2009, at 9:56 PM, Allan Sindelar wrote:
Kent,
No, this hasn’t happened to m
Kent,
No, this hasnt happened to me yet.
My biggest issue with CBI breakers is finding the correct bit/tip to get
good torque. Im not sure what it is, and would appreciate hearing what
works best its something like a size 2½ Phillips crossed with a Whitworth
square drive, or something (ne
Kent Osterberg wrote:
Allan,
I've had trouble with breakers opening when they shouldn't. On an
array of two strings of Mitsubishi 175s (Isc = 7.9A) I had two 15-A
breakers open. Last week, I had a low-power call from a customer with
three strings of Evergreen 190s (Isc = 7.1A); one 15-A bre
Hi all,
I've had one issue with the 100's of CBI breakers I've installed.
It was a failed 2 pole AC breaker, all the DC ones have worked
perfectly,
jay
peltz power
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Allan,
I've had trouble with breakers opening when they shouldn't. On an
array of two strings of Mitsubishi 175s (Isc = 7.9A) I had two 15-A
breakers open. Last week, I had a low-power call from a customer with
three strings of Evergreen 190s (Isc = 7.1A); one 15-A breaker in the
combiner wa
The analysis on the business side leaves out the 5 year accelerated
depreciation allowed (federal level - in Texas it holds true with state
business tax, so he might want to see if that applies there). It gets slightly
convaluted in how the mechanics work depending on how depreciation is taken a
Hiya David,
If ever there was an argument against the upfront, per-watt incentive
in favor of a feed-in tariff, that's it!
Bob-O
On Jul 27, 2009, at 10:05 AM, David Katz wrote:
Bob-O
I see a use for SolarMagic from National Semiconductor in large
systems with many parallel strings, installe
Bob-O
I see a use for SolarMagic from National Semiconductor in large systems
with many parallel strings, installed by inexperienced contractors who
put some of the strings in the shade, not realizing how little you get
with minimal shading of one string in parallel strings of modules. They
In this analysis doesn't 465 kWh/month x $ .0633 /kWh x 12 months/yr = $353.21
saved per year not $29.43? Or am I missing something?
Peter Talmage
Energy and Design
Northfield, Mass.
> To: RE-wrenches@lists.re-wrenches.org
> Subject:
> [RE-wrenches] Solar electric generation system seems to
>
Solar Pros,
I've had real reservations about using traditional bus-type combiners that fit
2/0 down to #10 awg wires. They are almost always a poor fit and electrical
connection for smaller gauge wires.
A neat solution I found to make 100% contact with all screw-type connectors, I
started us
In helping my residential customers define value, I talk about three things:
1 - economic value
2 - environmental value
3 - prestige value
economic value - I like to show my customers at least a 10 year payback period,
with a 10% pre-tax ROI on a 25 year term. With that I feel I can look them
Six cents a kwh is a very good price from the utility. Customers in California
need to be buying energy in the upper tier rates of .25 to .45 before a good
economic value is achieved. With this first pass comparison I am not going to
dig any further to try and prove that there is a good value f
All this figuring makes my head ache, that being said. Here
goes.
People do these systems for many reasons not always for a payback, i have
always thought that that is a bad reason anyway.
It might not be justifiable with a .06 per KWH rate. The rate in our area
for residential is .185 per KWK an
Tom,
You mentioned 90% as best performance for flat glass. Do you have a
corresponding number for tubes, in terms of losses due to
reflectance? Anyone else have any data to share?
Thanks,
Jim Grundy
NABCEP Certified Solar PV Installer
Vermont Solar Specialist Plumber PS-279
Elemental En
All breakers have torque specs and the recomendation is to torque them then
retorque then in a hour or so. This takes care of any "cold flow", that is
the soft copper mioving around after it is put under pressure.
It is not limited to CBI breakers, I wish i had a nickle for every breaker
that I ev
Hey everyone; I've been asked to assist a customer in investigating the possibilities of utilizing renewable energy in his small manufacturing company. following is his last email. I'm up to me arm pits in summer work at the moment, and not in the position to properly investigate or respond. wa
The only problem I've had with them is that their connectors can allow multi stranded wire to "broom out", (after installation) -- causing a loose / high resistance contact. I've learned to torque / wiggle & twist and retorque all multi strand connections. I have had one side of a 60A QO breaker go
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