back-up power...yet again ?

back-up power...yet again ?

PostBy: Mossy Beard On: Wed Dec 09, 2009 1:12 pm

I've got a Tripp Lite APS 750 on my Harman Mag.
It may have been doing it for awhile but I was in the basement when the inverter transferred the other day.
I'm experiencing a "buzzing" noise from the blower motors, on stand by power.
I did check the outlet voltage and it is around 97 v . That check was with my old amprobe. ( non-RMS meter) Someone said to check first with an RMS meter ?
Does anyone else notice this on stand-by power ?

I know low voltage is no good but I'm not sure what is causing it. ( if the reading is right) My battery is charged, 13.5 volts.
Any help/comments are appreciated.
Thanks, Mossy Beard
Mossy Beard
 
Stove/Furnace Make: Harman
Stove/Furnace Model: Magnum Stoker

Re: back-up power...yet again ?

PostBy: 009to090 On: Wed Dec 09, 2009 1:18 pm

Heres a thread with my experiences with backup power.

Building a TRUE Sinewave UPS for my DVC-500
009to090
 
Stoker Coal Boiler: EFM 520 HighBoy
Hot Air Coal Stoker Stove: DVC-500 x 2
Coal Size/Type: Anthracite Rice

Re: back-up power...yet again ?

PostBy: Mossy Beard On: Wed Dec 09, 2009 2:27 pm

Thanks, that's a good read.
I hate to throw the Tripp Lite over bank and start over...
It was supposed to do the job. I wish I could find out where the voltage drop is ?
I assuming that the low voltage will destroy the motors ?

Thx, Mossy Beard
Mossy Beard
 
Stove/Furnace Make: Harman
Stove/Furnace Model: Magnum Stoker

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Re: back-up power...yet again ?

PostBy: WNY On: Wed Dec 09, 2009 2:36 pm

it's Not voltage, it's Not a true sine wave output, mine does the same thing. But it's a cheap UPS, but works until I can get the generator online....runs about 10 mins or so. (Small batteries).
WNY
 
Hot Air Coal Stoker Stove: Keystoker 90K, Leisure Line Hyfire I
Coal Size/Type: Rice
Stove/Furnace Make: Keystoker, LL & CoalTrol
Stove/Furnace Model: 90K, Hyfire I, VF3000 Soon

Re: back-up power...yet again ?

PostBy: Mossy Beard On: Wed Dec 09, 2009 2:42 pm

WNY,
Do you have a Tripp Lite and have the same symptoms ?
Then the buzzing/low valtage would cause no harm ?

Thanks, Mossy
Mossy Beard
 
Stove/Furnace Make: Harman
Stove/Furnace Model: Magnum Stoker

Re: back-up power...yet again ?

PostBy: Freddy On: Wed Dec 09, 2009 4:01 pm

The buzzing is from the inverter sending modified sine wave power. Electric motor like pure sine wave. If left long enough on modified sine wave it could damage the motors.
Freddy
 
Stoker Coal Boiler: Axeman Anderson 130 (pea)
Hot Air Coal Stoker Stove: Reading piece o' junk in the barn (rice)
Coal Size/Type: Pea size, Superior, deep mined

Re: back-up power...yet again ?

PostBy: WNY On: Wed Dec 09, 2009 4:09 pm

No, mine is an APC or something like that.
But, yes, if left run long enough, it could damage motors as per other posts. I have never gone over 15 mins or so
WNY
 
Hot Air Coal Stoker Stove: Keystoker 90K, Leisure Line Hyfire I
Coal Size/Type: Rice
Stove/Furnace Make: Keystoker, LL & CoalTrol
Stove/Furnace Model: 90K, Hyfire I, VF3000 Soon

Visit Lehigh Anthracite