Datasheet

CT5.121
CT-Series
3-PHASE, 12V, 8A, 96W
22.3. SERIES OPERATION
Unit A
Input
Output
Unit B
-
+
-
+
Load
+
-
Input
Output
Devices of the same type can be connected in series for higher output voltages.
It is possible to connect as many units in series as needed, providing the sum of
the output voltage does not exceed 150Vdc. Voltages with a potential above
60Vdc must be installed with a protection against touching.
Avoid return voltage (e.g. from a decelerating motor or battery) which is
applied to the output terminals.
Keep an installation clearance of 15mm (left / right) between two power
supplies and avoid installing the power supplies on top of each other. Do not
use power supplies in series in mounting orientations other than the standard
mounting orientation.
Pay attention that leakage current, EMI, inrush current, harmonics will increase when using multiple devices.
22.4. PARALLEL USE TO INCREASE OUTPUT POWER
23/24
Devises can be paralleled to increase the output power. The output voltage
shall be adjusted to the same value (±100mV) with the same load conditions on
all devices, or the devices can be left with the factory settings.
The ambient temperature is not allowed to exceed +45°C.
If more than three devices are connected in parallel, a fuse or circuit breaker
with a rating of 10A is required on each output. Alternatively, a diode or
redundancy module can also be utilized.
Keep an installation clearance of 15mm (left / right) between two devices and
avoid installing the devices on top of each other. Do not use devices in parallel in mounting orientations other than
the standard mounting orientation or in any other condition where a reduction of the output current is required (e.g.
altitude).
Unit A
Unit B
-
+
-
+
Load
+
-
Input
Output
Input
Output
Pay attention that leakage current, EMI, inrush current will increase when using multiple devices.
22.5. USE IN A TIGHTLY SEALED ENCLOSURE
When the device is installed in a tightly sealed enclosure, the temperature inside the enclosure will be higher than
outside. In such situations, the inside temperature defines the ambient temperature for the device.
In the following test setup, the device is placed in the middle of the box, no other heat producing items are inside the
box. The load is placed outside the box.
The temperature sensor inside the box is placed in the middle of the right side of the power supply with a distance of
1cm.
The following measurement results can be used as a reference to estimate the temperature rise inside the enclosure.
Case A Case B
Enclosure size 110x180x165mm
Rittal Typ IP66 Box
PK 9516 100, plastic
110x180x165mm
Rittal Typ IP66 Box
PK 9516 100, plastic
Input voltage 400Vac 400Vac
Load
12V, 6.4A; (=80%) 12V, 8A; (=100%)
Temperature inside the box 51.1°C 56.9°C
Temperature outside the box 25.2°C 25.9°C
Temperature rise 25.9K 31.0K
May 2018 / Rev. 2.0 DS-CT5.121-EN All values are typical figures specified at 400Vac, 50Hz input voltage, 12V, 8A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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