ups systems load is always connected to inverter. in online
ups system the power supply goes to the end user through
the battery,if there is A.c power cut ,then no harm or
interruptibility occurs .
APPLICABLE IN CRITICAL INSTRUMENTS LIKE C.T SCAN,X-
by SAMEER HUSSAIN
SNA POWER ENG. PVT LTD LUDHIANA
while in case of offline ups sytems the raw A.c supply is
connected by a realy type of mechanism,then the battery and
inverter is bound tothe msin supply. so when there is A.c
Power cut ,the really needs a time gap of 3-5 ms to shift
it to battery mode.