Datasheet
YR80.241
Y-Series
24-28V, 80A, DUAL REDUNDANCY MODULE
4. POWER LOSSES
DC 24V
Power losses typ.
2.7W input: 2x20A
typ.
8.3W
input: 2x40A
typ.
3.6W input: 1x40A,
(only one input is connected to input voltage)
Standby power losses typ. 0.35W at no output current,
(only one input is connected to input voltage)
typ. 0.7W at no output current,
(both inputs are connected to input voltages)
Fig. 4-1 Power losses when both inputs draw equal current
(typical n+1 or 1+1 redundant case, when the power supplies are set into “parallel use” mode)
Power Losses, typ.
0
5/17
01020 60
2
4
6
8
10W
80A5030 40 70
Output Current
A
.
.
.
2
5
°
C
B
.
.
.
6
0
°
C
A
B
Output
V
A
QT40
24V,40A
+
-
"Parallel
Use"
V
A
I
1
I
2
U
1
U
2
A
V
I
OUT
U
OUT
I
1
I
2
=
U
2
U
1
=Losses
U
1
=
U
OUT
-
*
I
1
+)(
*
U
2
*
I
2
I
OUT
QT40
24V,40A
+
-
"Parallel
Use"
Variable
Load,
0-80A
YR80
Input 1
Input 2
Output
Fig. 4-2 Power losses when only one input is used
Power Losses, typ.
Losses
U
1
=
U
OUT
-
*
I
1
*
I
OUT
Output
V
A
QT40
24V,40A
+
-
I
1
U
1
A
V
I
OUT
U
OUT
YR80
Input 1
Input 2
Output
Variable
Load,
0-40A
0
0510 30
1
2
3
4
5W
2515 20 35 40
A
Output Current
A
.
.
.
2
5
°
C
B
.
.
.
6
0
°
C
A
B
Note: As soon as voltage is applied on input 2, an additional 0.35W will be consumed. It is not relevant, whether this channel contributes
to the output current or not.
Oct. 2010 / Rev. 1.0 DS-YR80.241-EN
All parameters are specified at 24V, 80A output current, 25°C ambient and after a 5 minutes run-in time unless otherwise noted
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