EN
QT40.361 Installation Manual
Product Description
The QT40.361 is a DIN-rail mountable power supply for three-phase mains systems, which provides a
floating, stabilized and galvanically separated SELV/PELV output voltage.
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 is allowed.
The enclosure of the device provides a degree of protection of IP20. The enclosure does not provide
protection against spilled liquids.
The isolation of the device is designed to withstand impulse voltages of overvoltage category III
according to IEC 60664-1.
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 576Vac continuously. The device is not designed to be
used on corner grounded delta systems.
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.
Functional Description
The output is electronically protected against no-load, overload and short circuit and can supply any
kind of loads, including unlimited inductive loads and capacitive loads.
Do not apply return voltages from the load to the output terminals higher than 50V.
The output voltage can be adjusted with a small flat-blade screwdriver behind the flap on the front.
The green DC-OK LED reports an output voltage above 90% of the adjusted voltage of a running
device.
The DC-OK relay monitors the output voltage and the contact is closed when the DC-OK LED is on.
Contact ratings: 60Vdc 0.3A, 30Vdc 1A, 30Vac 0.5A for resistive loads.
The red overload LED is on when the output voltage falls below 90% of the adjusted value
or in case
of a short circuit in the output. The LED is flashing, when the device has switched off due to over-
temperature or when the “Remote OFF” signal is activated. Input voltage is required.
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.
The device is designed to deliver 40A output current for up to 4s with nominal output voltage.
Devices can be paralleled to increase the output power. The ambient temperature is not allowed to
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 32 or 40A 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 48V. The output
shuts down and automatically attempts to restart.
The device is equipped with a remote ON/OFF function to turn the output off. For this connect pin 15
with pin 16.
The output voltage can be remotely adjusted between 21 and 42Vdc by applying a control voltage
between pin 15 and the (-) terminal. See product datasheet for details.
Technical Data
All values are typical figures specified at 3x 400Vac 50Hz input voltage,
symmetrical phase voltages, 36V, 26.7A output load, 25°C ambient
temperature and after a 5 minutes run-in time unless otherwise noted.
Output voltage
DC 36V
Nominal
Adjustment range
36 – 42Vdc
Factory setting 36V
Output current
Continuous:
26.7 – 22.9A
Below +60°C ambient
20.0 – 17.2A
At +70°C ambient
Short-term, up to 4s:
40.0 – 34.4A
Below +70°C ambient
Derate linearly b60°C and +70°C
Input voltage AC
3AC 380 - 480V
-15% / +20%
Mains frequency
50 – 60Hz
±6%
Input current AC
1.65 / 1.35A
At 3x400 / 480Vac
Power factor
0.88 / 0.90
At 3x400 / 480Vac
Input inrush current
4.5 / 4.5A peak
At 3x400 / 480Vac,
temp. independent
Efficiency
95.3 / 95.2%
At 3x400 / 480Vac
Losses
47.3 / 48.4W
At 3x400 / 480Vac
Hold-up time
25 / 25ms
At 3x400 / 480Vac
Temperature range
-25 to +70°C
Max. wire size (litz wire)
4mm²
For input terminals
Wire size AWG
AWG 20-10
For input terminals
Max. wire diameter
2.8mm
For input terminals
Wire stripping length
7mm / 0.28inch
For input terminals
Tightening torque
1Nm / 9lb.inch
For input terminals
Max. wire size (litz wire)
10mm² For
output
terminals
Wire size AWG
AWG 22-8
For output terminals
Max. wire diameter
5.2mm For
output
terminals
Wire stripping length
12mm / 0.5inch
For output terminals
Tightening torque
2.3Nm / 20lb.inch
For output terminals
Max. wire size (litz wire)
1.5mm²
For signal terminals
Wire size AWG
AWG 26-14
For signal terminals
Max. wire diameter
1.5mm
For signal terminals
Wire stripping length
7mm / 0.28inch
For signal terminals
Size (wxhxd)
110x124x127mm Without
DIN-rail
Weight
1500g / 3.3lb
Functional Diagram
L2
L3
L1
+
+
-
-
Output
Over-
Voltage
Protection
PFC
Converter
Power
Converter
Output
Filter
Output
Power
Manager
Temper-
ature
Shut-
down
Input Fuse
Input Filter
Input Rectifier
Inrush Current
Limiter
DC-OK
LED
Remote ON/OFF
Voltage control
ON/
OFF
15
16
Overload
LED
DC-OK
Contact
DC-ok
Relay
13
14
V
OUT
Output
Voltage
Regulator
Single /
Parallel
Event Datalogger
Output Characteristic
Output voltage in single-use mode
36V
Output current
18V
0V
10A
20A
30A
0A
Adjustment range
42V
40A
B
A
A: continuous
B: for 4s
Temperature Range
Allowed output current at 36V
Ambient temperature
0A
-25
A: continuous
B: short term (typ. 4s)
40A
0
+70°C
20A
B
26.7A
+60
A