Normal Mode (Parallel) - Delta NH-20k User Manual

2-5 Normal Mode (Parallel)

D elta NH-series provide 1+1 parallel combination to get redundancy or expand the total capacity.
CB3
CB2
RESERVE
MAIN
CB3
CB2
RESERVE
MAIN
Under this inst allation，the loading is shared by two UPS units. If there is something wrong in one
of them, the loading will be totally handle by another. In case the loading is greater than one
UPS can t ake, UPS will shutdown and then switch to the reserve mode. (Refer to Fig. 2-5)
CB1
CB1
Fig. 2-5 Normal Mode in parallel redundancy
STS
CB5
STS
CB5
2-4
CB4
UPS1
LOAD
CB4
UPS2