External input protection, Inductive and capacitive loads, Operation on two phases – Rockwell Automation 1606-XLP50E Power Supply Reference Manual User Manual
Page 20: Use in a tigthly sealed enclosure
All parameters are specified at 24V, 2.1A, 230Vac input, 25ªC ambient and after a 5 minutes run-in time unless noted otherwise.
20
Rockwell Automation Publication 1606-RM034A-EN-P — March 2014
Bulletin 1606 Switched Mode Power Supplies
26.8. External Input Protection
The unit is tested and approved for branch circuits up to 15A (UL) or 16A (IEC). External protection is required only if
the supplying branch has an ampacity greater than this. In some countries, local regulations may apply, so check local
codes and requirements.
If using an external protective device, a minimum value is required to avoid undesired tripping of the fuse.
c
i
t
s
i
r
e
t
c
a
r
a
h
C
-
C
c
i
t
s
i
r
e
t
c
a
r
a
h
C
-
B
Ampacity max.
min. 10A 6A
15A (UL), 16A (IEC)
15A (UL), 16A (IEC)
26.9. Inductive and Capacitive Loads
The unit is designed to supply any type of load, including unlimited capacitive and inductive loads.
26.10. Operation on Two Phases
Fig. 26-7 Schematic for two phase operation
240V
+1
0
%
ma
x.
Fuse
L2
L1
L3
L
N
PE
Power Supp ly
AC
DC
internal
fuse
Instructions for two phase operation:
a)
A phase to phase connection is allowed as long as the
supplying voltage is below 240V+10%
.
b)
Use a fuse or a circuit breaker to protect the N input. The
N input is not protected internally; in this case it is
connected to a hot wire.
Appropriate fuses or circuit breakers are specified in section 27-6,
“External Input Protection”.
26.11. Use in a Tigthly Sealed Enclosure
When the power supply is installed in a tightly sealed enclosure, the temperature inside the enclosure will be higher
than the outside. The inside temperature defines the ambient temperature for the power supply.
Results from such an installation:
Power supply is placed in the middle of the box; no other heat producing equipment is inside the box.
Enclosure:
Rittal Type IP66 Box PK 9510 100, plastic, 130x130x75mm
Input:
230Vac
Load:
24V, 2.1A; load is placed outside the box.
Temperature inside the box: 40.8°C (in the middle of the right side of the power supply with a distannce of 1cm)
Temperature outside the box: 21.9°C
Temperature rise: 18.9K
Load:
24V, 1.7A; load is placed outside the box.
Temperature inside the box: 38.7°C (in the middle of the right side of the power supply with a distance of 1cm)
Temperature outside the box: 21.7°C
Temperature rise: 17.0K