Section II
General Product Information
006-0007068 UPS-1500-S-2S Guide
Rev E
15 of 60
09/10/20
0
200
400
600
800
1000
1200
1400
25
30
35
40
45
50
Output
Power
(Watts)
Air Temperature (°C)
Output Power vs. Air Temperature
V
AC(IN)
>105 V
RMS
or V
DC(IN)
>22 V
V
AC(IN)
= 90 V
RMS
and V
DC(IN)
<22 V
V
AC(IN)
= 80 V
RMS
and V
DC(IN)
<22 V
Figure 2
• If the AC INPUT voltage is above 105 Vrms, then the UPS can deliver its full rated output power
of 1250 W from the AC INPUT for an ambient temperature as high as 50
o
C (122
o
F) without
needing to switch over to the optional DC INPUT or the internal BATTERY PACK.
• If the AC INPUT is between 90 Vrms and 80 Vrms then the total output power that can be
derived from the AC INPUT linearly decreases from 1250 W at 90 Vrms to 1000 W at 80 Vrms
(except for at the high end of the ambient temperature range – see below). For example, the
total output power that could be derived from the AC INPUT would be 1125 W at 85 Vrms as
long as the ambient temperature is not above 45
o
C (113
o
F). If the total output power is greater
than this derated value, the UPS will switch to the DC INPUT (if it is available and >22 V) or the
internal BATTERY PACK.
• If the AC INPUT voltage is 90 Vrms AND the ambient air temperature is above 40
o
C (104
o
F),
the total output power that can be derived from the AC INPUT linearly decreases from 1250 W
at 40
o
C (104
o
F) to 1000 W at 50
o
C (122
o
F). For example, the total output power that could
be derived from the AC INPUT would be 1125 W at an AC INPUT voltage of 90 Vrms and an
ambient temperature of 45
o
C (113
o
F). A higher output power than this would cause the UPS
to switch over to its DC INPUT or the internal BATTERY PACK.
• When the AC INPUT voltage is between 105 Vrms and 90 Vrms AND the ambient temperature is
between 40
o
C and 50
o
C, the total output power that can be derived from the AC INPUT can be
calculated by linearly interpolating between the curves shown. For example, the total output
power that can be derived from the AC INPUT when the voltage is 97.5 Vrms would be 1250 W
up to an ambient temperature of 45
o
C (113
o
F) and then derate to 1125 W at 50
o
C (122
o
F).
