Section II
General Product Information
006-0006205
UPS-1500 Series
Rev ZC
16 of 60
05/28/2019
UPS Efficiency
Figure 1 shows the typical efficiency with which the UPS-1500 series uninterruptible power
supplies delivers power to its AC OUTPUT from a 230 Vrms AC INPUT, an 115 Vrms AC INPUT or a
28 V DC INPUT. Units with the “Electronic Breaker” option installed can be up to 1% less efficient
at full load.
70.0%
75.0%
80.0%
85.0%
90.0%
95.0%
0
200
400
600
800
1000
1200
1400
Efficiency
Ouput Power (Watts)
Efficiency vs. Output Power
for Each Input Source
28 Vdc
230 Vac
115 Vac
Figure 1
Total Output Power that can be derived from the AC INPUT
The total UPS output power (the AC OUTPUT power plus the optional DC OUTPUT power) for
the UPS-1500 series is rated at 1250 W for an ambient temperature as high as 55
o
C (131
o
F). It
draws this power first from the AC INPUT (if its voltage is within range) and then the DC INPUT (if
its voltage is within range) and then from the internal BATTERY PACK (if it has sufficient charge).
However, when the AC INPUT voltage is at the low end of its range (<90 Vrms) or the ambient
temperature is at the high end of its range (>45oC/113oF) the UPS will not be able to deliver its
full rated output power in the steady-state without switching over to either the DC INPUT (if it
is available and >22 Vdc) or its internal battery. Figure 2 indicates the total steady-state output
power that the UPS can derive from the AC INPUT under these extreme conditions. See Figure
