You'll never find the DC out pins of a transformer!
UPS Belkin 550VA Transformer can be use as a charger in 12V70AmpHr Battery?
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9th September 2011 01:00 AM #1jayce_sos
UPS Belkin 550VA Transformer can be use as a charger in 12V70AmpHr Battery?
Hi There!
I have here a transformer from an old UPS (Belkin 550VA), I just wondering if I can use it as a battery charger, my problem is I cannot locate the PCB connected to it(to trace the flow of AC/DC). Available information of transformer I have here are in one side there are 3 wires Blue, Brown & Red on the other side Black, Red, Brown, yellow and Blue.
It is also labeled on the top
080-48172-00
GP 0751
Class B Viking B-2
E210832
Can someone help me with this little project?
Thanks in advance!
Jayce
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9th September 2011 01:27 AM #2Sceadwian
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9th September 2011 01:31 AM Thread Starter #3jayce_sos
Thanks for the reply. Okay, so how will I know which wires are plug to AC outlet and which wires are connected to bridge rectifier?
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9th September 2011 02:03 AM #4RODALCO
You should be able to use that transformer as it was used basically as a step up transformer in the inverter.
Often there are multiple primary taps on it 110, 127, 220, 230, 240, 277 Volts.
The 12 Volt side should have thick wires and low resistance.
If those get connected to a bridge rectifier it should work as a charger ok.
Put a 200 Watt lamp in series with the mains voltage during testing. just in case there is a fault or wrong connection.0Ω There are more ways to get to Rome. Ω
Electricity, Electric clocks, Meters, Batteries and Trains are amazing.
Please don't sent me private messages about electrical topics.
The questions asked can be discussed in the open forums, so we all can learn from it or participate in a solution.
http://www.youtube.com/user/RODALCO2007 some interesting electrical stuff to watch.
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9th September 2011 04:01 AM Thread Starter #5jayce_sos
Okay, rodalco I'll try to test it with 200 watt lamp. Thanks!
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9th September 2011 04:14 AM #6crutschow
If the transformer is unloaded you could use a more common 100W bulb or even smaller.
0Zapper
Curmudgeon Elektroniker
--Inside every little problem is a big problem trying to get out.--
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10th September 2011 10:10 AM #7awt
Just as said by Rodalco. Let me just add to it, start testing with the lamp from red to blue with black as common. The tap at which the lamp just stop glowing is ok to be connected to mains with the black.
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10th September 2011 11:41 AM #8Jackdaniel
hi
what does "550VA" mean? What is the "VA" Rating?
Could anyone please help me?0
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10th September 2011 03:42 PM #9Sceadwian
That's the wattage the UPS was rated for during usage.
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10th September 2011 03:55 PM #10awt
VA is the power rating of the transformer in voltage-ampere. This is the apparent power, transformers are always rated this way. The product of VA rating and power factor of the transformer gives you real power (in watt).
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