Answer / sarmadahmed

UPS mainly consists of 3 things, a battery, a charge controller and a DC to AC converter (inverter). The battery gets charged by utility. When utility is out, it supplies the load with the energy stored in the battery. Battery stores DC only so it has to be converted to AC before connecting to load which is done by inverter. Since the inverter works on electronics and doesn't provide pure sinusoidal waveform, UPS output has a lot of harmonics.

Answer / k.prakashchandra

It has a battery which gets charged from the mains and
caters to the load with help of inverter during supply failure.

234 MVA Generator 3 phase Short circuit current Values required? Gen set Rating-234 MVA, Gen Voltage-18kv, PF;0.8, Xdv:23.5 %, Transformer Rating-18/380KV, 680MVA,Yndd1 two winding, Step up TR, ZT:35.50 %,X/R 4.33 Gen CB Position, CB open ,Disconnected open, Generator Running Voltage 18 Kv, Bi mistakes generator side earth switch Closed during that time short circuit current level in 3 Phase required, and how to test on site 234MVA Generator Short circuit current,

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