Datasheet
QT20.241, QT20.241-C1
Q-Series
24V, 20A, THREE PHASE INPUT
Oct. 2006 / Rev. 1.0 DS-QT20.241-EN
All parameters are specified at 24V, 20A, 3x400Vac, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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20/23
27.6. EXTERNAL INPUT PROTECTION
The unit is tested and approved for branch circuits up to 15A (U.S.A.) and 16A (IEC). External protection is only
required, if the supplying branch has an ampacity greater than this. In some countries local regulations might apply.
Check also local codes and local requirements.
If an external fuse is necessary or utilized, a minimum value is required to avoid undesired tripping of the fuse.
B-Characteristic C-Characteristic
Ampacity max.
16A (U.S.A.: 15A) 16A (U.S.A.: 15A)
min.
6A 3A
27.7. 2-PHASE OPERATION
The QT20 series is specified to operate on two phases.
Fig. 27-7 Wiring diagram 2-phase operation
Instructions for 2-ph operation:
Reduce output power according to curve. Exceeding the
limits results in a thermal shut-down.
The specification for EMC performance, hold-up time,
losses and output ripple will no longer be valid. Check
suitability individually in the application.
DC
L1
L2
PE
L2
L1
L3
Fuse
L3
open
Fig. 27-8 2-phase operation, allowed output
current
Fig. 27-9 2-phase operation, Hold-up time
Allowed Output Current at 24V
0
-25 0 20
70°
C
5
10
15
20
25
30A
c
o
n
t
i
n
u
o
u
s
Input Voltage
f
o
r
t
y
p
.
4
s
40 60
A
.
.
.
2
x
4
6
0
t
o
5
5
2
V
a
c
B
.
.
.
2
x
3
4
0
t
o
4
6
0
V
a
c
B
A
0
10
20
30
40
50ms
320 360 400 440 2x480Vac
Input Voltage
Hold-up Time (2-Ph)
2
4
V,
1
0
A
,
t
y
p
.
2
4
V
,
2
0
A
,
t
y
p
.
2
4
V,
1
0
A
,
m
i
n
.
2
4
V
,
2
0
A
,
m
i
n
.