CT10.241, CT10.241-C1
CT-Series
3-P
HASE
,
24V,
10A,
240W
May 2018 / Rev. 2.0a DS-CT10.241-EN All values are typical figures specified at 3x 400Vac, 50Hz input voltage, symmetrical
phase voltages, 24V, 10A output load, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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26/28
22.7.
O
PERATION ON
T
WO
P
HASES
No external protection device is required to protect against a phase-loss
failure.
The power supply is allowed to run permanently on only two legs of a 3-
phase system, when the output power is reduced according to the curves
below. A long-term exceeding of these limits will result in a thermal shut-
down of the device.
Pay attention that EMC performance, hold-up time and losses differ from a three phase operation. Therefore, check
suitability of your individual application.
Using only two legs of a 3-phase system is not included in the agency approval. Therefore, additional investigations
might be necessary during the approval process of the final system.
Fig. 22-6
Allowed output current for use on
only two legs of a 3-phase system
Fig. 22-7
Hold-up time for use on only two
legs of a 3-phase system
Allowed Output Current at 24V
0
-25
0
20
70°C
2
4
6
8
10
12A
40
60
Ambient Temperature
A
B
A... 2x 340-576Vac
B... 2x 320-340Vac
0
20
40
60
100ms
320
360
400
440 2x480Vac
Input Voltage
Hold-up Time at 24Vdc
5A
, ty
p.
10A,
typ.
10A,
min
.
5A, m
in.
80
Fig. 22-8
Efficiency vs. output current at 24V
for use on only two legs of a 3-phase system
Fig. 22-9
Losses vs. output current at 24V for
use on only two legs of a 3-phase system
Efficiency
2
89
91
93
88
94%
12A
4
8
10
Output Current
6
90
92
2x400Vac
2x480Vac
Power Losses
0
2
4
8
10 12A
0
4
12
20
24W
8
6
16
Output Current
2x480Vac
2x400Vac
DC
L1
L2
L3
open
AC
L1
L2
L3
PE
Power Supply