Infrastructure and Mobility, Traffic Solutions
Sopers Lane, Poole, Dorset
BH17 7ER
Version
7
Page 53 of 76
Status
ISSUED
Last Editor
Ore Oluwatudimu
TS008468
Date
31/01/2017
Document
Name
UPS Solution General Handbook
Doc. No.
667/HB/47750/000
Copyright
Siemens plc 2017 All Rights Reserved
Figure 12-4: Battery Charging Cycle
12.5 Temperature De-Rating
WARNING:
For the majority of UK installations, it is reasonable to assume a
worst case cabinet temperature range of
0°C
to
65°C
.The UPS Solution
must
be derated
to at least these values to help ensure correct operation.
12.5.1 Power output
The Alpha FXM1100 and FXM2000 UPS units offer a maximum power output of 1100VA
and 2000VA respectively. See section 4.1. In high ambient temperatures, the maximum
power available decreases as the FXM UPS units reach the limits of their operating
range.
The
FXM1100
UPS unit is de-rated by
1.25% for every degree above 55°C
. The
FXM2000
UPS unit is de-rated by
1.0% for every degree above 50°C
gives specific figures showing how this affects the maximum power output available.
Ambient
Temperature
FXM1100 Max. O/P
FXM2000 Max. O/P
-40°C
1100 W/VA
2000 W/VA
0°C
1100 W/VA
2000 W/VA
25°C
1100 W/VA
2000 W/VA
50°C
1100 W/VA
2000 W/VA
55°C
1100 W/VA
1900 W/VA
60°C
1031.25 W/VA
1800 W/VA
65°C (UK worst case)
962.5 W/VA
1700 W/VA
70°C
893.75 W/VA
1600 W/VA
74°C
838.75 W/VA
1520 W/VA
Table 12-6: Maximum Output Power against Ambient Temperature
