Derating depending on ambient temperature
The following graph shows the maximum rms current in continuous S1 (Pn)
and intermittent S6-40% (Pmax) duty cycles for a switching frequency of the
power transistors of 8 kHz in a temperature range between 5°C/41°F and
60°C/140°F. See the load cycles in the next section.
RPS-80. Power derating graph
T. H2/25 Power derating on RPS-80 power supply (8 kHz).
Pn
Tª ambient
(power in S1)
in RPS mode
°C
°F
kW
35
95
80.0
40
104
80.0
45
113
80.0
50
122
76.6
55
131
72.0
60
140
67.3
F. H2/27
Power derating on RPS-80 power supply for fc = 8 kHz.
RPS-75. Power derating graph
T. H2/26 Power derating on RPS-75 power supply (8 kHz).
Pn
Tª ambient
(power in S1)
in RPS mode
°C
°F
kW
35
95
75.0
40
104
75.0
45
113
75.0
50
122
71.1
55
131
67.1
60
140
63.0
F. H2/28
Power derating on RPS-75 power supply for fc = 8 kHz.
PS6
(power in S6-40%)
in RPS mode
in RB6 mode
kW
kW
104.0
97.0
104.0
97.0
104.0
97.0
99.5
97.0
93.6
97.0
87.5
97.0
PS6
(power in S6-40%)
in RPS mode
in RB6 mode
kW
kW
97.5
97.0
97.5
97.0
97.5
97.0
92.5
97.0
87.2
97.0
81.9
97.0
Power supplies
2.
DDS
HARDWARE
Ref.1912
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