Hi all
When trying to run the pump with the inverter, make the following measurements.
DC amps, and DC volts to the inverter, multiply by about 0.9, this is the true
power. Then measure at the same time the AC volts and the AC amps. this it the
apparent power. Power factor is the ratio of a
Well, as it's the first grid-tie system in this region they are
paying close attention. The guy I am dealing with is very stern and
precise. I put down 100%, as they wanted a percentage. So we'll see.
Thx all for the feedback, helpful as always!
Ron
On 30-Jul-09, at 5:58 PM, Allan Sindelar
Ron,
Why try to break it to them at all? Just answer the question. Put down 1.0
or unity. That's what they're looking for. Then go on to the next question.
They'll never catch it.
Allan Sindelar
al...@positiveenergysolar.com
NABCEP Certified Photovoltaic Installer
EE98J Journeyman Electrician
Posi
Geeze,
Are the PF meters available separately without having to replace a perfectly
fine 337?
Matt
boB Gudgel wrote:
> Allan Sindelar wrote:
> > Matt and boB,
> > This is only somewhat relevant, but may help:
> > A few days ago, on initial bootup of a new system with a Magnum MS4024AE, we
Allan,
Yeah. If I could talk him into a better pump (it's the money!) the whole issue
would go away. Sort of. Like a lot of folks, they save their dough and pay for
improvements piecemeal, and the pump is the last big hit (if they only knew!)
being saved for.
Matt
Allan Sindelar wrote:
Allan Sindelar wrote:
Matt and boB,
This is only somewhat relevant, but may help:
A few days ago, on initial bootup of a new system with a Magnum MS4024AE, we
easily ran a 1HP submersible at nearly 500' head plus pressurizing (single
pump system). However, this was a Grundfos SQ, so the soft-star
Hi Jay,
I think I'll check his wire connections at all the connection points first, and
then the next time I'm in the area, bring my Fluke (which DOESN'T measure PF)
for a closer look. Believe it or not, his meter is one of those mini GB
thingies, analog of course, that would be better as a pap
Matt and boB,
This is only somewhat relevant, but may help:
A few days ago, on initial bootup of a new system with a Magnum MS4024AE, we
easily ran a 1HP submersible at nearly 500' head plus pressurizing (single
pump system). However, this was a Grundfos SQ, so the soft-start made it
much easier. S
jay peltz wrote:
Hi Matt,
I would try a few things, but its very curious to me that the inverter
won't even get a try out of the motor.
I've seen plenty of motors not work, but they tried to start.
And given the 7k genny starts it, the 4k inverter should start it too.
I would check the curren
Hi Matt,
I would try a few things, but its very curious to me that the inverter
won't even get a try out of the motor.
I've seen plenty of motors not work, but they tried to start.
And given the 7k genny starts it, the 4k inverter should start it too.
I would check the current under load and
Matt wrote:
Unh - hunh, but it will run on the generator. If it didn't, I would go for the bad
starter or motor, but it "seems" like the PF could be an issue??
Matt T
Well, an inverter is just (supposed to be) a low impedance Voltage
Source and the current does whatever it is going to do.
Unh - hunh, but it will run on the generator. If it didn't, I would go for the
bad starter or motor, but it "seems" like the PF could be an issue??
Matt T
boB Gudgel wrote:
> Matt wrote:
> > Possibly a PF question, or maybe one for Magnum - boB,
> >
> > One of the guys at work is (almost)
Unh - hunh, but it will run on the generator. If it didn't, I would go for the
bad starter or motor, but it "seems" like the PF could be an issue??
Matt T
boB Gudgel wrote:
> Matt wrote:
> > Possibly a PF question, or maybe one for Magnum - boB,
> >
> > One of the guys at work is (almost)
Matt wrote:
Possibly a PF question, or maybe one for Magnum - boB,
One of the guys at work is (almost) running a 3/4 hp sub pump with a Magna AE
48. Or rather, he isn't. According to him when he first fired it up, it
operated the pump just fine. The next time he tried, though. he couldn't even
Possibly a PF question, or maybe one for Magnum - boB,
One of the guys at work is (almost) running a 3/4 hp sub pump with a Magna AE
48. Or rather, he isn't. According to him when he first fired it up, it
operated the pump just fine. The next time he tried, though. he couldn't even
get a buzz o
boB Gudgel wrote:
>>So, because of the different ways of specifying PF, it is always best
to think of Power Factor as being the ratio of real (in phase) power, or
VA to reactive power >>(VARS or "Volt Ampere Reactive"). That will
work in all cases.
OOOps ! See, this can get confusing.
R. Walters wrote:
Power factor expresses the time difference between voltage peak and
current peak on each of their sine waves. If both current and voltage
waves are "in time", (their wave peaks match up) power factor is 1. If
one is ahead or behind the other, it's not. Think about an electric
Power factor expresses the time difference between voltage peak and
current peak on each of their sine waves. If both current and voltage
waves are "in time", (their wave peaks match up) power factor is 1.
If one is ahead or behind the other, it's not. Think about an
electric motor: we hit
Ron,
Here is a definition for Power Factor that we used in our String Inverter
guide in SP1.1:
POWER FACTOR AT RATED OUTPUT
Definition: The ratio of true power to apparent power in the inverter ac
output circuit at its rated power.
Importance: True power is measured in units of watts and describe
Ron Young wrote:
Ok, so all seem to be in agreement more or less. How do I break it to
British Columbia Hydro? :-|
I think they must be misunderstanding what they are asking for but the
question is in the section for PV and on the same line as the total
output in Kwh of the PV. Power Factor %
Ok, so all seem to be in agreement more or less. How do I break it to
British Columbia Hydro? :-|
I think they must be misunderstanding what they are asking for but the
question is in the section for PV and on the same line as the total
output in Kwh of the PV. Power Factor %
I'll contact
Quick-release started with the Los Angeles Fire Department. The PV industry
rejected quick-release as impractical, costly, an invitation for theft,
etc., but it won't go away. For lots of background info on fire safety
requirements, see http://osfm.fire.ca.gov/training/photovoltaics.php
-
William and Wrenches,
To go into the top of a Carlon outdoor enclosure, box connectors are
available. The Carlon part numbers are E996D for a 1/2"
connector. The numbers for other sizes are E996E for 3/4", E996F for 1", etc.
These are glue in connectors with a NEMA TC - 3
approval.
http:/
There is no such thing as a power factor for DC or for panels.
..
Northern Arizona Wind & Sun - Electricity From The Sun Since 1979
Solar Discussion Forum: http://www.wind-sun.com/ForumVB/
.
Hi Ryan,
Is the cat 5 cable in the same conduit or really close to the AC lines?
I have seen other remotes (Trace) in the same conduit that would scramble,
one would do it in a day or so after power was applied.
I did not do that install but figured out what i thought was happening and
have avoided
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