Page 241 - Uninterruptible Power Supplies

Notes on Systems Installation
Notes on Systems Installation 239

Figure 9.3

~ UPS LOAD

Figure 9.4

acid cell is preferable. For reasons of initial cost the tubular cells
should be considered. Such cells are available with a large volume of
electrolyte, enabling the cells to withstand long periods without elec-
trolyte replenishment.
The dc-ac inverter illustrated in Fig. 9.5 may act as either an inverter
feeding power to the load from either wind or solar or battery source. In
the event that these sources are unavailable, the generator supplies the
load and the inverter reverses its operational mode, acting as a charger
for the battery system. Note that reverting to the generator is unusual,
but there is no loss of power during the changeover period.

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