Page 1
Data sheet
Power supply CP-T 48/20.0
Primary switch mode power supply
The CP-T range of three-phase power supply
units is the youngest member of ABB’s power
supply family. In terms of design and functionality,
the new range perfectly supplements the existing
products and extends the range appropriately.
The devices can be supplied with a three-phase
voltage as well as with two-phase mains. Here,
ABB offers a power supply unit with 48 V DC
output with 20 A and efficiency of up to 93 %. As
in the case of all products, they are designed for
an ambient temperature of up to 70 °C.
2CDC 271 049 S0009
Characteristics
– Rated output voltage 48 V DC
– Output voltage adjustable via front-face rotary
potentiometer “OUTPUT Adjust“
– Active current balancing for parallel mode
– Rated output current 20 A
– Rated output power 960 W
– Wide supply voltage range 3 x 400-500 V AC
(340-575 V AC, 480-820 V DC)
– Two-phase supply with a derating of the output to 75 %
possible / permitted
– High efficiency of up to 93 %
– Low power dissipation and low heating
– Free convection cooling (no forced cooling with
ventilators)
– Ambient temperature range during operation -40...+70 °C
– Open-circuit, overload and short-circuit stable
– Integrated input fuse
Order data
Type Rated input voltage
range
CP-T 48/20.0 340-575 V AC
480-820 V DC
Rated output voltage Rated output current Order code
48 V DC 20 A 1SVR 427 056 R2000
Approvals
UL 508, CAN/CSA C22.2 No.14
A
ANSI/ISA-12.12 (Class I, Div. 2, Hazardous Locations),
H
CAN/CSA C22.2 No. 213
UL 60950, CAN/CSA C22.2 No. 60950
H
GB4943, GB9254, GB17625.1
R
GOST
D
1)
Approvals refer to rated input voltage U
Marks
CE
a
C-Tick pending
b
1)
in
1)
1)
Page 2
1 Wide input range
INPUT L1, L2, L3, PE: terminals - input
Optimised for worldwide applications: The CP-T
power supply units can be supplied for a wide range
of AC and DC voltages. Both kinds of power supply
(three-phase and two-phase) are possible.
2 Circuit diagram
2CDC 271 049 S0009
3 Adjustable output voltage
OUTPUT Adjust: potentiometer
The CP-T range types feature a continuously
adjustable output voltage. Thus, they can be optimally
adapted to the application, e.g. compensating the
1
2 3 4 5 6
voltage drop caused by a long cable length.
4 Indication of operational states
OUTPUT LOW: red LED - output voltage too low
OUTPUT OK: green LED - output voltage OK
5 Current balancing
Current balance CB+, CB-
For active current balancing in parallel operation
6 Output
OUTPUT L+, L+, L-, L-: terminals - output
Application
The primary switch mode power supply offers a three-phase supply voltage range of 3 x 400-500 V AC. A two-phase power
supply is also possible and it can also be supplied by 480-820 V DC. Furthermore, this power supply unit is equipped with
two generous capacitors, which ensure mains buffering of at least 15 ms. That is why the devices can be used worldwide
also in high fluctuating networks and battery-powered plants.
Operating mode
By means of the potentiometer “OUTPUT Adjust“ the output voltage can be adjusted within a range of 47-56 V DC. Thus,
the power supply can be optimally adapted to the application, e.g. compensating the voltage drop caused by a long line
length.
The green LED “OUTPUT OK“ is lightening during proper operation, i. e. when the output voltage exceeds 75 %.
The red LED “OUTPUT LOW“ is lightening when the output voltage is less than 70 % of the rated output voltage.
Two-phase supply is permissible with a derating of the output to 75 %.
2 - Power supply CP-T 48/20.0 | Data sheet
Page 3
Installation
The device must be installed by qualified persons only and in accordance with the specific national regulations (e.g. VDE, etc.).
The devices are maintenance-free chassis-mounted units.
Before installation
DANGER!
Components with high stored energy and circuits with high voltage
Danger to be electrocuted!
► Disconnect the system from the supply network and protect against switching on before any installation,
maintenance or modification work.
► Do not introduce any objects into the unit and do not open the unit.
► Ensure that the service personnel is protected against inadvertent contact with parts carrying energy.
Mounting
The switch mode power supply can be snapped on a DIN rail (TH 35-15 or TH 35-7.5 according to IEC/EN 60715) as
shown in the accompanying picture. For that the device is set with its mounting rail slide on the upper edge of the mounting
rail and locked by lifting it downwards.
2CDC 272 016 F0010
Demounting
Remove the switch mode power supply as shown in the accompanying picture. For that the latching lever is pulled
downwards by means of the screwdriver. Alternatively you can press the unlock button to release the device. Then in both
cases the device can be unhinged from the mounting rail edge and removed.
2CDC 272 017 F0010
Mounting position
The devices have to be mounted horizontally with the input terminals on the bottom. In order to ensure a sufficient
convection, the minimum distance to other modules should not be less than 25 mm (0.98 in) in vertical and horizontal
direction.
[B]
[A]
L1 L2 L3
L2
L3
L+L1
PWM
L+
LL-
[B]
CP-T 48/20.0
13 14
L+ L+ L- L-
[A]
2CDC 272 014 F0010
Data sheet | Power supply CP-T 48/20.0 - 3
Page 4
Electrical connection
o
L+ L-L+ L-
L2
L3
PWM
o
L1 L2 L3
L+L1
L+
LL-
CB+ CB-
L+, L- Output voltage
L1, L2, L3 Input voltage
o Protective earth
CB+, CB- Current balance
2CDC 272 008 F0010
Connection diagram
Preparations:
– Connect to main according to the specific national regulations.
– Power supply cables and unit must be sufficiently fused. A disconnecting device has to be provided for the power
supply to disengage unit and supply cables from supply mains if required.
– We recommend to choose the cable section as large as possible in order to minimize voltage drops.
– In order to ensure sufficient air-cooling the distance to other devices has to be considered.
Instructions:
1. Connect the input terminals L1, L2 and L3.
2. Connect the protective earth conductor to the terminal o (protection class I).
3. Provide a suitable disconnecting device (e.g. line protection switch) in the supply line acc. to IEC/EN 60950.
4. Rate the lines for the maximum output current (considering the short-circuit current) or provide a separate fuse
protection. The input side is protected by an internal input fuse.
5. Observe the polarity.
The device is overload, short-circuit and open-circuit proof. The secondary side of the power supply unit is electrically
isolated from the input and internally not earthed (SELV) and can therefore be earthed by the user according to the needs
with L+ or L- (PELV).
Operation
DANGER!
High current
Risk of electric arcs and electric shocks!
► Do not modify the installation (primary and secondary side).
► Intended use.
CAUTION!
Depending on the operation conditions the enclosure can become very hot
Risk of burns!
► In order to ensure sufficient air-cooling the distance to other devices has to be considered.
The device is intended for use as a primary switch mode power supply. Any other usage is not supported by the
manufacturer. Other usage may impair safety and cause operational difficulties or destruction of the unit.
Service
The internal fuse is not user-replaceable. If the internal fuse blows, most probably the device is defective. In this case, an
examination of the switch mode power supply by the manufacturer is necessary.
4 - Power supply CP-T 48/20.0 | Data sheet
Page 5
Technical data
Data at Ta = 25 °C, Uin = 3 x 400 V AC and rated values, unless otherwise indicated
Input circuit - supply circuit L1, L2, L3
Rated input voltage U
Input voltage range 340-575 V AC
Frequency range AC 47-63 Hz
Typical current consumption 1,72 A
Typical power consumption 1050 W
Inrush current limiting 30 A
Power failure buffering time min. 15 ms
Internal input fuse per phase T5 A / 500 V AC
Recommended backup fuse 3 pole miniature circuit breaker ABB type S 203
Power factor correction (PFC) yes, passive, 0.8
Discharge / leakage current towards PE < 3.5 mA
Indication of operational states
Output voltage OUTPUT OK: green LED output voltage OK
in
characteristic B or C
max. rating 20 A
input / output < 0.25 mA
OUTPUT LOW: red LED output voltage too low
3 x 400-500 V AC
480-820 V DC
Output circuit L+, L+, L-, L-
Rated output power 960 W
Rated output voltage 48 V DC
Tolerance of the output voltage 0...+1 %
Adjustment range of the output voltage 47-56 V DC
Rated output current I
Derating of the output current 60 °C < Ta ≤ 70 °C 3.5 %/°C
Maximum deviation with load change statical ±1 % (single mode)
Control time at rated load < 2 ms
Starting time after applying the supply voltage at Irmax. 1 s
Rise time at rated load max. 150 ms
Fall time max. 150 ms
Residual ripple and switching peaks BW = 20 MHz 80 mV
Parallel connection to increase power, up to 2 devices,
Series connection yes, to increase voltage, max. 2 devices
r
change of output voltage within the
input voltage range
Ta ≤ 60 °C 20 A
±5 % (parallel mode)
±0.5 %
with 7000 µF max. 1.5 s
with 7000 µF max. 500 ms
min. 0.1 Ir - max. 0.9 Ir
use active current balancing
Data sheet | Power supply CP-T 48/20.0 - 5
Page 6
Output circuit - no-load, overload and short-circuit behaviour
Characterstic curve of output hiccup mode / fold back behaviour
Short-circuit protection continuous short-circuit proof
Short-circuit behaviour current limiting
Resistance to reverse feed approx. 35 V
Overload protection hiccup mode
No-load protection continuous no-load stability
Overtemperature protection yes, automatic recovery after temperature went
down
Starting of capacitive loads 7000 µF
General data
Efficiency typ. 93 %
Duty time 100 %
Dimensions (W x H x D) 275.8 x 124 x 118.8 mm (10.86 x 4.88 x 4.68 in)
Weight 3.275 kg (7.220 lb)
Material of housing metal
Mounting DIN rail (IEC/EN 60715), snap-on mounting without
any tool
Mounting position horizontal
Minimum distance to other units horizontal / vertical 25 mm / 25 mm (0.98 in / 0.98 in)
Degree of protection housing / terminals IP20 / IP20
Protection class I
Electrical connection - input circuit L1, L2, L3
Wire size fine-strand with wire end ferrule 0.2-4 mm² (24-11 AWG)
fine-strand without wire end ferrule 0.2-6 mm² (24-10 AWG)
rigid 0.2-6 mm² (24-10 AWG)
Stripping length 8 mm (0.31 in)
Tightening torque 1 Nm (9 lb.in)
Electrical connection - output circuit L+, L+, L-, L-
Wire size fine-strand with wire end ferrule 0.5-10 mm² (20-8 AWG)
fine-strand without wire end ferrule 0.5-16 mm² (20-6 AWG)
rigid 0.5-16 mm² (20-6 AWG)
Stripping length 10 mm (0.39 in)
Tightening torque 1.8 Nm (15.6 lb.in)
Environmental data
Ambient temperature range operation -40...+70 °C
rated load -40...+60 °C
storage -40...+85 °C
Damp heat, cyclic IEC/EN 60068-2-30 95 % without condensation
Vibration, sinusoidal IEC/EN 60068-2-6 2 g, 10-500 Hz, 2G, each along X, Y, Z axes 60
min / cycle
Shock, half-sine IEC/EN 60068-2-27 15 g, 11 ms, 3 axes, 6 faces, 3 times for each face
6 - Power supply CP-T 48/20.0 | Data sheet
Page 7
Isolation data
Rated insulation voltage U
i
input circuit / output circuit 3 kV AC
input / PE 1.5 kV AC
Pollution degree 2
Overvoltage category UL/EN/IEC 60950-1 II
Standards
Product standard EN 61204-3
Low Voltage Directive 2006/95/EC
EMC Directive 2004/108/EC
RoHS Directive 2002/95/EC
Electrical safety EN 60950-1, UL 60950-1, UL 508,
EN 61558-1, EN 61558-2-17, EN 60204-1
Protective low voltage SELV
Electromagnetic compatibility
Interference immunity to IEC/EN 61000-6-2
electrostatic discharge IEC/EN 61000-4-2 level 4 (air discharge 15 kV /
contact discharge 8 kV)
radiated, radio-frequency, electromagnetic field IEC/EN 61000-4-3 level 3 (10 V/m)
electrical fast transient/burst IEC/EN 61000-4-4 level 4 (4 kV / 5 kHz)
surge IEC/EN 61000-4-5 L-L level 3 (2 kV) /
L-PE level 4 (4 kV)
conducted disturbances, induced by radio-
IEC/EN 61000-4-6 level 3 (10 V)
frequency fields
power frequency magnetic fields IEC/EN 61000-4-8 level 4 (30 A/m)
voltage dips, short interruptions and voltage
variations
IEC/EN 61000-4-11 dips: >95 % 0.5 ms / >30 % 25 ms
interruptions: >95 % 250 ms
Interference emission IEC/EN 61000-6-3
high-frequency radiated IEC/CISPR 22, EN 55022 class B
high-frequency conducted IEC/CISPR 22, EN 55022 class B
limits for harmonic current emissions IEC/EN 61000-3-2 class A
Data sheet | Power supply CP-T 48/20.0 - 7
Page 8
Technical diagrams
P
[%]
Output behaviour
in V
U
out
56
48
40
32
24
16
8
4812 16 20 24
Hiccup mode
after 5-10 s overload
@ 3 x 400 V supply
U/I
28
32
36
40
I
in A
out
2CDC 272 028 F0211
Characteristic curve of output at Ta = 25 °C
The switch mode power supply CP-T 48/20.0 is able to supply at 48 V DC output voltage and
– at an ambient temperature of:
≤ 60 °C a continuous output current of approx. 20 A
– at ambient temperatures of:
60 °C < Ta ≤ 70 °C the output power has to be reduced by 3.5 % per °C temperature increase.
If the switch mode power supply is loaded with an output current > 20 A, the operating point is passing through the U/I
characteristic curve shown.
Temperature behaviour
out
100
90
80
70
60
50
40
30
20
10
-40 60 70
Ta [°C]
2CDC 272 026 F0211
Characteristic curve of temperature at rated load
8 - Power supply CP-T 48/20.0 | Data sheet
Page 9
Dimensions
in mm and inches
118.8 4.68‘‘
111.9 4.41‘‘
Wiring notes for parallel connection
275.8 10.86‘‘
131 5.16‘‘
124 4.88‘‘
2CDC 272 024 F0009
CP-T 48/20.0
INPUT 3 x 400-500 V AC
L1 L2 L3
o
No
Function
A
OUTPUT 48 V DC 20.0 A
L+ L+ L- L-
Current balance -
Current balance +
INPUT 3 x 400-500 V AC
L1 L2 L3
o
CP-T 48/20.0
A
No
Function
OUTPUT 48 V DC 20.0 A
L+ L+ L- L-
Current balance -
Current balance +
L+
L-
2CDC 272 018 F0010
Active current balancing in parallel operation
Ⓐ Same length of the wires for current balancing
Further Documentation
Document title Document type Document number
Electronic products and relays Technical catalogue 2CDC 110 004 C020x
Power supply units Application manual 2CDC 114 048 M020x
You can find the documentation on the internet at www.abb.com/lowvoltage -> Control Products -> Power Supplies
Data sheet | Power supply CP-T 48/20.0 - 9
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