I have observed difference in input and out put current of inverter of our UPS system. What i observed is 86 amps battery current, 156 amps inverter out put current and 72 amps the final out put current. Let say the current reduces from 152 to 72 due to filtration and other inductors in its way. But the difference is way too much. Secondly how come 86 amp DC is converted to 152 amps AC.

The only reason come to my mind is the difference in inverter input and output power factor.

 

I'd look at the voltages, P in = P out - losses.

That's one of the cool things about switchers, you can put 12V at 5 A in and get 6 V at 10 A out.

And remember you have to use effective voltages to make the numbers work.

Regards
cww

 

Thank you for the reply.

Interesting thing is that we have input battery voltage of 220 VDC. Output is 220 VAC. This is the point over which i am confused.

 

Unless you have invented a free energy machine. I'd say some of your instrumentation is lying, most likely due to the inverter waveform not being sinusoidal.

Regards
cww