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Show off your backup power thread

Started by ducatiz, February 08, 2010, 10:08:43 AM

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mitt

#30
February 08, 2010, 04:43:09 PM
Quote from: ducatiz on February 08, 2010, 04:38:30 PM
electric or gas?

my gas furnace fan only pulls about 3A

Gas

How are you measuring it?

ducpainter

#31
February 08, 2010, 04:43:36 PM
Quote from: ducatiz on February 08, 2010, 04:38:30 PM
electric or gas?

my gas furnace fan only pulls about 3A
The blower?

I think not.

mine is oil BTW.
"Once you accept that a child on the autistic spectrum experiences the world in
 a completely different way than you, you will be open to understand how that
 perspective
    is even more amazing than yours."
    To realize the value of nine  months:
    Ask a mother who gave birth to a stillborn.
"Don't piss off old people The older we get, the less 'Life in Prison' is a deterrent."


ducatiz

#32
February 08, 2010, 04:45:46 PM
Quote from: mitt on February 08, 2010, 04:43:09 PM
Gas

How are you measuring it?



I open the filter door and voila, there is a sticker on it.


Quote from: ducpainter on February 08, 2010, 04:43:36 PM
The blower?

I think not.

that's nothing new... ;D
Check out my oil filter forensics thread!                     Offended? Click here
"Yelling out of cars, turning your speakers out the window to blast your music onto the street, setting off M-80 firecrackers, firing automatic weapons into the airâ€"these are all well and good. But none of them create a merry atmosphere of insouciance and bonhomie quite like a revving motorcycle.

ducpainter

#33
February 08, 2010, 04:46:59 PM
Quote from: ducatiz on February 08, 2010, 04:45:46 PM
I open the filter door and voila, there is a sticker on it.



not much of a blower. :-\
"Once you accept that a child on the autistic spectrum experiences the world in
 a completely different way than you, you will be open to understand how that
 perspective
    is even more amazing than yours."
    To realize the value of nine  months:
    Ask a mother who gave birth to a stillborn.
"Don't piss off old people The older we get, the less 'Life in Prison' is a deterrent."


mitt

#34
February 08, 2010, 04:48:51 PM
Quote from: ducatiz on February 08, 2010, 04:40:09 PM
what the hell kind of fridge is that?

I have a brand new LG fridge (the french door model).  it pulls 6 A on running and only 7.5 on startup. 

i know the old old school fridges pull hard on startup, but sheehs, 2 to 20? wtf?

You would be surprised at how high real peak current is on electrical motors.  It doesn't last long it is only 1 or 2 AC cycles, each cycle is 16.67 milliseconds.  Circuit breakers for example set their mag trip levels from 3 to 10X their handle rating.

I brought a high end true rms peak capture fluke meter with hall current sensor and a tektronix scope home to capture my data.

Here is a chart of my household loads and other misc info I found for anyone who is interested:

http://sites.google.com/site/mittelstadtc/Home/engineering/generators


mitt

ducatiz

#35
February 08, 2010, 04:49:38 PM
Quote from: ducpainter on February 08, 2010, 04:46:59 PM
not much of a blower. :-\

it's a trane high efficiency system, <6 yo.  works fine for our house which is just under 3000 sq ft. 
Check out my oil filter forensics thread!                     Offended? Click here
"Yelling out of cars, turning your speakers out the window to blast your music onto the street, setting off M-80 firecrackers, firing automatic weapons into the airâ€"these are all well and good. But none of them create a merry atmosphere of insouciance and bonhomie quite like a revving motorcycle.

ducatiz

#36
February 08, 2010, 04:51:00 PM
Quote from: mitt on February 08, 2010, 04:48:51 PM
You would be surprised at how high real peak current is on electrical motors.  It doesn't last long it is only 1 or 2 AC cycles, each cycle is 16.67 milliseconds.  Circuit breakers for example set their mag trip levels from 3 to 10X their handle rating.

i don't understand why my 1000w generator isn't grenading then...

6.1A fridge and 3A furnace fan.  generator has 1200w peak for i don't know how long.
Check out my oil filter forensics thread!                     Offended? Click here
"Yelling out of cars, turning your speakers out the window to blast your music onto the street, setting off M-80 firecrackers, firing automatic weapons into the airâ€"these are all well and good. But none of them create a merry atmosphere of insouciance and bonhomie quite like a revving motorcycle.

mitt

#37
February 08, 2010, 04:52:03 PM
Quote from: ducpainter on February 08, 2010, 04:46:59 PM
not much of a blower. :-\

3A might be what it says, but not what your furnace is using when pulling air.  My furnace says 1/3HP, so about 250W, so about 2A, similar to yours, but it pulls more like 600W, about 5 A when running.  There are a few other loads in the furnace that are in that figure too.

mitt

mitt

#38
February 08, 2010, 04:53:41 PM
Quote from: ducatiz on February 08, 2010, 04:51:00 PM
i don't understand why my 1000w generator isn't grenading then...

6.1A fridge and 3A furnace fan.  generator has 1200w peak for i don't know how long.

Where did you get 6.1A for the fridge? 

mitt

ducpainter

#39
February 08, 2010, 04:56:07 PM
Quote from: mitt on February 08, 2010, 04:53:41 PM
Where did you get 6.1A for the fridge? 

mitt

I'm wondering what voltage they're using?
"Once you accept that a child on the autistic spectrum experiences the world in
 a completely different way than you, you will be open to understand how that
 perspective
    is even more amazing than yours."
    To realize the value of nine  months:
    Ask a mother who gave birth to a stillborn.
"Don't piss off old people The older we get, the less 'Life in Prison' is a deterrent."


ducatiz

#40
February 08, 2010, 04:57:27 PM
Quote from: mitt on February 08, 2010, 04:53:41 PM
Where did you get 6.1A for the fridge? 

mitt


here

Check out my oil filter forensics thread!                     Offended? Click here
"Yelling out of cars, turning your speakers out the window to blast your music onto the street, setting off M-80 firecrackers, firing automatic weapons into the airâ€"these are all well and good. But none of them create a merry atmosphere of insouciance and bonhomie quite like a revving motorcycle.

ducpainter

#41
February 08, 2010, 04:58:20 PM
Quote from: ducatiz on February 08, 2010, 04:57:27 PM
here


I believe I know why your generator is handling it.
"Once you accept that a child on the autistic spectrum experiences the world in
 a completely different way than you, you will be open to understand how that
 perspective
    is even more amazing than yours."
    To realize the value of nine  months:
    Ask a mother who gave birth to a stillborn.
"Don't piss off old people The older we get, the less 'Life in Prison' is a deterrent."


ducatiz

#42
February 08, 2010, 04:59:57 PM
Quote from: ducpainter on February 08, 2010, 04:58:20 PM
I believe I know why your generator is handling it.

i ~know~ why.. the fridge and the fan are <1000W operating and <1200W startup..  AFAIK

you guys are convinced my fan is pulling 5-6 amps and i can't believe it.
Check out my oil filter forensics thread!                     Offended? Click here
"Yelling out of cars, turning your speakers out the window to blast your music onto the street, setting off M-80 firecrackers, firing automatic weapons into the airâ€"these are all well and good. But none of them create a merry atmosphere of insouciance and bonhomie quite like a revving motorcycle.

ducpainter

#43
February 08, 2010, 05:01:43 PM
Quote from: ducatiz on February 08, 2010, 04:59:57 PM
i ~know~ why.. the fridge and the fan are <1000W operating and <1200W startup..  AFAIK

you guys are convinced my fan is pulling 5-6 amps and i can't believe it.
nope...

your generator and your utility is delivering more than 115 volts.

P=IE...

measure your supply voltage...and

do the math counselor
"Once you accept that a child on the autistic spectrum experiences the world in
 a completely different way than you, you will be open to understand how that
 perspective
    is even more amazing than yours."
    To realize the value of nine  months:
    Ask a mother who gave birth to a stillborn.
"Don't piss off old people The older we get, the less 'Life in Prison' is a deterrent."


ducatiz

#44
February 08, 2010, 05:04:18 PM
Quote from: ducpainter on February 08, 2010, 05:01:43 PM
nope...

your generator and your utility is delivering more than 115 volts.

P=IE...

measure your supply voltage...and

do the math counselor

i haven't checked the generator, it might be putting out 120, but i doubt more than that.  can't be drastically more amperage though.  it's got a voltage regulator on it (yeah yeah i know, they go bad)
Check out my oil filter forensics thread!                     Offended? Click here
"Yelling out of cars, turning your speakers out the window to blast your music onto the street, setting off M-80 firecrackers, firing automatic weapons into the airâ€"these are all well and good. But none of them create a merry atmosphere of insouciance and bonhomie quite like a revving motorcycle.
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