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CT10.481, CT10.481-C1 Installation Manual
EN
Product Description
The CT10.481 is a DIN-rail mountable power supply for three-phase mains systems, which provides a
floating, stabilized and galvanically separated SELV/PELV output voltage.
The CT10.481-C1 device is the same as the CT10.481 but with conformal coated pc-boards.
Intended Use
This device is designed for installation in an enclosure and is intended for commercial use, such as in
industrial control, process control, monitoring and measurement equipment or the like. Do not use this
device in equipment where malfunction may cause severe personal injury or threaten human life.
Installation Instructions
Install device in an enclosure providing protection against electrical, mechanical and fire hazards.
Install the device onto a DIN-rail according to EN 60715 with the input terminals on the bottom of the
device. Other mounting orientations require a reduction in output current.
Make sure that the wiring is correct by following all local and national codes. Use appropriate copper
cables that are designed for a minimum operating temperature of 60°C for ambient temperatures up to
+45°C, 75°C for ambient temperatures up to +60°C and 90°C for ambient temperatures up to +70°C.
Ensure that all strands of a stranded wire enter the terminal connection.
Unused screw terminals should be securely tightened.
The device is designed for pollution degree 2 areas in controlled environments. No condensation or
frost allowed.
The enclosure of the device provides a degree of protection of IP20.
The isolation of the device is designed to withstand impulse voltages of overvoltage category III
according to IEC 60664-1. For corner grounded delta systems, the overvoltage category level is
reduced to level II.
The device is designed as "Class of Protection I" equipment according to IEC 61140.
Do not use without a proper PE (Protective Earth) connection.
The device is suitable to be supplied from TN-, TT- and IT mains networks. The voltage between the L
terminals and the PE terminal must not exceed 500Vac continuously.
A disconnecting means shall be provided for the input of the device.
The device is designed for convection cooling and does not require an external fan. Do not obstruct
airflow and do not cover ventilation grid!
The device is designed for altitudes up to 6000m (19685ft). See additional requirements in the product
datasheet for use above 2000m (6560ft).
Keep the following minimum installation clearances: 40mm on top, 20mm on the bottom, 5mm left and
right side. Increase the 5mm to 15mm in case the adjacent device is a heat source. When the device
is permanently loaded with less than 50%, the 5mm can be reduced to zero.
The device is designed, tested and approved for branch circuits up to 32A (IEC) and 30A (UL) without
additional protection device. If an external fuse is utilized, do not use circuit breakers smaller than 6A
B- or C-Characteristic to avoid a nuisance tripping of the circuit breaker.
The maximum surrounding air temperature is +70°C (+158°F). The operational temperature is the
same as the ambient or surrounding air temperature and is defined 2cm below the device.
The device is designed to operate in areas between 5% and 95% relative humidity.
Installation Instructions for Hazardous Location Areas
The device is suitable for use in Class I Division 2 Groups A, B, C, D locations.
WARNING EXPLOSION HAZARDS!
Substitution of components may impair suitability for this environment.
Do not disconnect the device or operate the voltage adjustment unless power has been switched off or
the area is known to be non-hazardous.
Functional Description
The output is electronically protected against no-load, overload and short circuit and can supply any
kind of loads, including unlimited inductive and capacitive loads.
Do not apply return voltages from the load to the output terminals higher than 63Vdc.
The output voltage can be adjusted with a small flat-blade screwdriver on the front of the unit.
The green DC-OK LED reports an output voltage above 36V of a running device.
The device is equipped with an over-temperature protection. In case of a high temperature, the output
shuts down and starts automatically again after cooling off.
Devices can be paralleled to increase the output power. The ambient temperature is not allowed to
exceed +60°C. The output voltage of all devices shall be adjusted to the same value (±100mV) in
"Single Use" mode with the same load conditions on all units, or the units can be left with the factory
settings. After the adjustments, set the unit to "Parallel Use" mode, in order to achieve load sharing.
The "Parallel Use" mode regulates the output voltage in such a manner that the voltage at no load is
approx. 4% higher than at nominal load. If more than three devices are connected in parallel, a diode,
fuse or circuit breaker with a rating of 10A is required on each output.
Same devices can be connected in series for higher output voltages. It is allowed to connect as many
devices in series as needed, providing the sum of the output voltage does not exceed 150Vdc.
In case of an internal defect, a redundant circuit limits the maximum output voltage to 60V. The output
shuts down and automatically attempts to restart.
Technical Data
All values are typical figures specified at 3x 400Vac 50Hz input voltage,
symmetrical phase voltages, 48V 5A output, 25°C ambient temperature
and after a 5 minutes run-in time unless otherwise noted.
Output voltage
DC 48V
Adjustment range
48 – 56Vdc
Output current
6.0 – 5.2A
5.0 – 4.3A
3.8 – 3.2A
Derate linearely between +45°C and +70°C
Input voltage AC
AC 380 - 480V
Mains frequency
50 – 60Hz
Input current AC
0.7 / 0.6A
Power factor
0.53 / 0.52
Input inrush current
4 / 4A peak
Efficiency
92.8 / 92.9%
Losses
18.6 / 18.3W
Hold-up time
34 / 54ms
Temperature range
-25 to +70°C
Max. wire size (litz wire)
4mm²
Wire size AWG
AWG 20-10
Max. wire diameter
2.8mm
Wire stripping length
7mm / 0.28inch
Tightening torque
1Nm / 9lb.inch
Size (wxhxd)
62x124x117mm
Weight
750g / 1.65lb
Functional Diagram
L1
Input Fuse
L2
Input Filter
Input Rectifier
PFC
L3
Inrush Current
Inductor
Limiter
Temper-
Output
Output
ature
Over-
Power
Shut-
Voltage
Manager
down
Protection
Output Characteristic
Output voltage
56V
48V
24V
0V
0A
1A
2A
3A
4A
5A
Temperature Range
Allowed output current at 48V
6.0A
5.0A
3.75A
A: continuous
B: short term (max. 60s)
0A
-25
0
+25
Nominal
Factory setting 48.0V
Below +45°C ambient
At +60°C ambient
At +70°C ambient
-15% / +20%
±6%
At 3x400 / 480Vac
At 3x400 / 480Vac
At 3x400 / 480Vac
At 3x400 / 480Vac
At 3x400 / 480Vac
At 3x400 / 480Vac
Without DIN-rail
+
+
Output
Power
Converter
Filter
-
-
DC-OK
LED
V
OUT
Voltage
Regulator
Single /
Parallel
Adjustment range
9A 10A 11A
6A
7A
8A
Output current
B
A
+45
+60
+70°C
Ambient temperature
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