MaxPower Corp Gamatronic Power+ SA - Manual (Page 90)

Gamatronic Electronic Industries Ltd.
20.1 Input and output wiring for two-phase operation
As shown in Table 20-1, there are two options for two-phase operation:
• Where the two input phases to the UPS have a phase shift of 120°. In this
case, the effective input and output voltage between the phases is 208VAC.
• Where the two input phases to the UPS have a phase shift of 180°. In this
case, the effective input and output voltage between the phases is 240VAC.
Input and output wiring for two-phase operation
For both two-phase options, the wiring is the same (refer to Figure 20-2):
For input: One input phase is connected to UPS input L1, the second phase is
connected to UPS input L2. UPS input L3 is not used. Neutral input is connected to
the neutral connector of the AC input terminal, and ground is connected to the ground
connector of the AC input terminal.
For output: UPS output L3 is linked to UPS output L1. The load takes one output
phase from L1, the second output phase from L2. Neutral output comes from the
neutral connector of the AC output terminal. Ground for the load comes from the
ground connector of the AC output terminal.
Figure 20-2: Wiring overview for symmetrical 2-phase operation
POWER+ SA User Guide (UL), Release 1.0 84