ABB PVS800-57-0100kW-A, Руководство по оборудованию, Страница: 128 / 180

126 Technical data
Temperature rating of types-0500kW-A, -0875kW-B and -1000kW-C
This curve shows the load capacity of inverter types -0500kW-A, -0875kW-B and -
1000kW-C as a function of ambient temperature. The curve is applicable at altitudes below
1000 m (3300 ft).

With temperature compensated altitude derating
Each degree of maximum ambient temperature below the nominal ambient temperature
gives a compensation to the altitude derating, but the temperature derating curve and
maximum allowed altitude must not be exceeded. When calculating the compensated
altitude derating factor, you must observe the corner points of the temperature rating
curves.
Example1: For inverter types PVS800-57-0100kW-A and PVS800-57-0250kW-A installed
at 1800 m (5900 ft), if the maximum ambient temperature is limited to +35 °C (95 °F), the
compensated altitude derating factor is 100% - 8 · 1% + (40 - 35) · 1% = 97% or 0.97.
Example 2: For inverter types PVS800-57-0315kW-B, PVS800-57-0630kW-B installed at
2100 m (6890 ft), if the maximum ambient temperature is limited to +35 °C (95 °F), the
compensated altitude derating factor is 100% - 11 · 1% + (45 - 35) · 0.5% = 94% or 0.94.
Example 3: For inverter types PVS800-57-0500kW-A, PVS800-57-0875kW-B and
PVS800-57-1000kW-C installed at 2800 m (9200 ft), if the maximum ambient temperature
is limited to +32 °C (89 °F), the compensated altitude derating factor is 100% -
18 · 1% + (50 - 45) · 1.6% + (45 - 32) · 0.6% = 97.8% or 0.978.
T
100
90
+35 °C
+95 °F
+55 °C
+131 °F
80
+45 °C
+113 °F
+25 °C
+77 °F
+ 15 °C
+ 59 °F
110
%
120
...
...
0
+60 °C
+140 °F
-15 °C
+5 °F
Nominal ambient temperature
108