CT10.241, CT10.241-C1
3-PHASE, 24V, 10A, 240W

CT-Series

POWER SUPPLY
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3AC 380-480V Wide-range Input
2 or 3-Phase Operation Possible
Width only 62mm
Efficiency up to 92.9% Due to Synchronous Rectifier
Excellent Partial Load Efficiency
20% Output Power Reserves (PowerBoost)
Easy Fuse Tripping Due to High Overload Current
Input -Transient Blanking Circuit Included
Minimal Inrush Current Surge
Three Input Fuses Included
Current Sharing Feature for Parallel Use
Full Power Between -25°C and +60°C
3 Year Warranty

PRODUCT DESCRIPTIONSHORT-FORM DATAThe Dimension CT-Series are cost optimized power
supplies without compromising quality, reliability andperformance. The CT-Series is part of the DIMENSION
power supply family. The most outstanding features of
CT10.241 are the high efficiency, electronic inrush
current limitation, active input transient filter and wide
operational temperature range. The small size isachieved by a synchronous rectification and further
technological design details.

Output voltage
Adjustment range
Output current

The CT10.241-C1 is equipped with conformal coating
preferred for applications in harsh areas.
The CT-Series includes all the essential basic functions.
The devices also offer PowerBoost: Power reserves of
20%, which may even be used continuously attemperatures up to +45°C. Additionally, the CT10.241
can deliver 3 times the nominal output current for 10ms
which helps to trip fuses on faulty output branches.

ORDER NUMBERS

ZM1.WALL
ZM13.SIDE

Input voltage AC
Mains frequency
Input current AC
Power factor
AC Inrush current
Efficiency
LossesHold-up time
Temperature range
Size (WxHxD)
WeightMAIN APPROVALSPower Supply CT10.241
CT10.241-C1 Conformal coating
Accessory

PowerBoost

DC 24V
Nominal24 - 28V
Factory setting 24.1V
10.0 - 8.6A
Up to +60°C ambient
7.5 – 6.5A
At +70°C ambient
Derate linearly between +45°C and +70°C
12.0A
Up to +45°C ambient
Linear decrease to nominal power
between +45°C and +60°C
3AC 380-480V-15%/+20%
50-60Hz±6%
0.7 / 0.6A
At 3x400 / 480Vac
0.53 / 0.52
At 3x400 / 480Vac
4 / 4Apk
At 3x400 / 480Vac
92.8 / 92.9%
At 3x400 / 480Vac
18.6 / 18.3W
At 3x400 / 480Vac
34 / 54ms
At 3x400 / 480Vac-25°C to +70°C
62x124x117mm Without DIN rail
750g

Wall/panel mount bracket
Side mount bracket

For details and the complete approval list, see chapter18.

UL 508

UL 60950-1

Class I Div 2

MarineMarineAug. 2022 / Rev. 2.3 DS-CT10.241-EN All values are typical figures specified at 3x 400Vac, 50Hz input voltage, symmetricalphase voltages, 24V, 10A output load, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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1/2CT10.241, CT10.241-C1
3-PHASE, 24V, 10A, 240W

CT-Series

INDEX
Page
1. Intended Use .......................................................3
2. Installation Instructions ......................................3
3. AC-Input...............................................................5
4. DC-Input...............................................................6
5. Input Inrush Current ...........................................6
6. DC Output............................................................7
7. Hold-up Time .......................................................8
8. Efficiency and Power Losses................................9
9. Functional Diagram ...........................................10
10. Front Side and User Elements ...........................10
11. Connection Terminals .......................................11
12. Lifetime Expectancy ..........................................12
13. MTBF ..................................................................12
14. EMC ....................................................................13
15. Environment ......................................................14
16. Safety and Protection Features ........................15
17. Dielectric Strength ............................................16
18. Approved, Fulfilled or Tested Standards..........17Page
19. Regulatory Product Compliance ...................... 18
20. Physical Dimensions and Weight ..................... 19
21. Accessories ........................................................ 20
21.1. ZM1.WALL - Wall/Panel Mount Bracket .. 20
21.2. ZM13.SIDE - Side Mount Bracket ............. 2121.3. YRM2.DIODE - Redundancy Modules ...... 22
22. Application Notes ............................................. 23
22.1. Peak Current Capability ........................... 23
22.2. Output Circuit Breakers ............................ 24
22.3. Charging of Batteries ............................... 24
22.4. Series Operation ....................................... 25
22.5. Parallel Use to Increase Output Power .... 25
22.6. Parallel Use for Redundancy .................... 26
22.7. Operation on Two Phases ........................ 27
22.8. Use in a Tightly Sealed Enclosure ............ 28
22.9. Mounting Orientations ............................ 29

The information given in this document is correct to the best of our knowledge and experience at the time of
publication. If not expressly agreed otherwise, this information does not represent a warranty in the legal sense of theword. As the state of our knowledge and experience is constantly changing, the information in this data sheet issubject to revision. We therefore kindly ask you to always use the latest issue of this document (available underwww.pulspower.com).
No part of this document may be reproduced or utilized in any form without our prior permission in writing.

TERMINOLOGY AND ABBREVIATIONSPE andsymbolPE is the abbreviation for Protective Earth and has the same meaning as the symbol.

Earth, Ground

This document uses the term “earth” which is the same as the U.S. term “ground”.

t.b.d.

To be defined, value or description will follow later.

AC 400V

A figure displayed with the AC or DC before the value represents a nominal voltage withstandard tolerances (usually ±15%) included.
E.g.: DC 12V describes a 12V battery disregarding whether it is full (13.7V) or flat (10V)

400VacA figure with the unit (Vac) at the end is a momentary figure without any additional
tolerances included.

50Hz vs. 60Hz

As long as not otherwise stated, AC 380V and AC 400V parameters are valid at 50Hz and AC
480V parameters are valid at 60Hz mains frequency.

may

A key word indicating flexibility of choice with no implied preference.

shall

A key word indicating a mandatory requirement.

shouldA key word indicating flexibility of choice with a strongly preferred implementation.

Aug. 2022 / Rev. 2.3 DS-CT10.241-EN All values are typical figures specified at 3x 400Vac, 50Hz input voltage, symmetricalphase voltages, 24V, 10A output load, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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CT10.241, CT10.241-C1
3-PHASE, 24V, 10A, 240W

CT-Series

1. INTENDED USEThis 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 malfunctioning may cause severe personal injury or threaten human life
without additional appropriate safety devices, that are suited for the end-application.
If this device is used in a manner outside of its specification, the protection provided by the device may be impaired.

2. INSTALLATION INSTRUCTIONSWARNING

Risk of electrical shock, fire, personal injury or death.

- Turn power off before working on the device. Protect against inadvertent re-powering.
- Do not open, modify or repair the device.
- Use caution to prevent any foreign objects from entering the housing.
- Do not use in wet locations or in areas where moisture or condensation can be expected.
- Do not touch during power-on and immediately after power-off. Hot surfaces may cause burns.
Obey the following installation requirements:
This device may only be installed and put into operation by qualified personnel.
This device does not contain serviceable parts. If damage or malfunction should occur during installation or operation,
immediately turn power off and send unit to the factory for inspection. The tripping of an internal fuse is caused by aninternal defect.
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 aredesigned 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. Use ferrules for wires on the input terminals. Unused screw terminals should besecurely 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 housing does not provide protection against
spilled liquids.
The device is designed for overvoltage category II zones. Below 2000m altitude the device is tested for impulse
withstand voltages up to 4kV, which corresponds to OVC III according to IEC 60664-1 (except for corner groundeddelta systems).
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 or IT mains networks. The continuous voltage between the input
terminals and the PE potential must not exceed 500Vac. Corner grounded delta systems are allowed.
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 notcover ventilation grid!
The device is designed for altitudes up to 5000m. Above 2000m a reduction in output current is required. Keep thefollowing 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.
Aug. 2022 / Rev. 2.3 DS-CT10.241-EN All values are typical figures specified at 3x 400Vac, 50Hz input voltage, symmetricalphase voltages, 24V, 10A output load, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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CT10.241, CT10.241-C1
3-PHASE, 24V, 10A, 240W

CT-Series

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 toavoid a nuisance tripping of the circuit breaker.
The maximum surrounding air temperature is +70°C. 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.
The device can also operate on only 2 phases of three-phase mains systems. Use L1 and L2 in such cases. The rated
input current will be 1.5A for 380Vac and 1.3A for 480Vac mains voltages.
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 isknown to be non-hazardous.

Aug. 2022 / Rev. 2.3 DS-CT10.241-EN All values are typical figures specified at 3x 400Vac, 50Hz input voltage, symmetricalphase voltages, 24V, 10A output load, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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CT10.241, CT10.241-C1
3-PHASE, 24V, 10A, 240W

CT-Series

3. AC-INPUT
The device is suitable to be supplied from TN-, TT- and IT mains networks with AC voltage. Grounding of one phase isallowed except for UL508 applications.
The device can also operate on only two legs of the three-phase system. See chapter 22.7 for more information.
Nom.

Allowed voltage L or N to earth
Input frequency
Turn-on voltage
Shut-down voltage
External input protection

3AC 380-480V
3x 323-576Va
3x 576-700Vac
For maximal 1s (occasional)
Max.
500VacContinuous operation, according to IEC 62477-1
Nom.
50–60Hz±6%
Typ.
3x 260Vac
Steady-state value, see Fig. 3-1
Typ.
3x 185Vac
Steady-state value, see Fig. 3-1
See recommendations in chapter 2.

Input current
Power factor
Start-up delay
Rise time

Typ.
Typ.
Typ.
Typ.

3AC 400V
0.7A
0.53
90ms
40ms

3AC 480V
0.6A
0.52
90ms
40ms

Typ.

85ms

85ms

Max.

200mV

200mV

Turn-on overshootFig. 3-1 Input voltage range

Rated input
range

Fig. 3-2 Turn-on behavior, definitions

< 1s

Input
VoltageTurn-onShut-down

POUT

VIN
185V 260V 323V

Input Current, typ.

0cVa
00 Vac4
3x 4803x- 5%

OutputVoltageStart-up
delay

576V 3x700Vac

Fig. 3-3 Input current vs. output load at 24V

0.8A
0.7
0.6
0.5
0.4
0.3
0.2
0.1

At 24V, 10A, per phase, see Fig. 3-3
At 24V, 10A, see Fig. 3-4
See Fig. 3-2
At 24V, 10A const. current load, 0mF load
capacitance, see Fig. 3-2
At 24V, 10A const. current load, 10mF load
capacitance, see Fig. 3-2
See Fig. 3-2

0.6

Power Factor, typ.

3x
400Vac

0.55
0.5

3x
480Vac

0.4
0

2

4

6

8

10

12A

Rise
Time

Fig. 3-4 Power factor vs. output load

0.45

Output Current

OvershootAC input
AC input range

Output Current

0.35
0

2

4

6

8

10

12A

Aug. 2022 / Rev. 2.3 DS-CT10.241-EN All values are typical figures specified at 3x 400Vac, 50Hz input voltage, symmetricalphase voltages, 24V, 10A output load, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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CT10.241, CT10.241-C1
3-PHASE, 24V, 10A, 240W

CT-Series

4. DC-INPUT
Do not use the power supply with DC-input voltages.

5. INPUT INRUSH CURRENT
An active inrush limitation circuit limits the input inrush current after turn-on of the input voltage and after short
input voltage interruptions.
The charging current into EMI suppression capacitors is disregarded in the first microseconds after switch-on.

Inrush current

Max.
Typ.
Max.

Inrush energy

3AC 400V
10Apeak
4Apeak
0.5A2s3AC 480V
10Apeak
4Apeak
0.5A2sTemperature independent
Temperature independent
Temperature independentFig. 5-1 Typical input inrush current
behaviour at nominal load and 25°C ambient
Input current 1A/DIV

Input voltage 500V/DIV

Output voltage
20ms/DIV

Aug. 2022 / Rev. 2.3 DS-CT10.241-EN All values are typical figures specified at 3x 400Vac, 50Hz input voltage, symmetricalphase voltages, 24V, 10A output load, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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CT10.241, CT10.241-C1
3-PHASE, 24V, 10A, 240W

CT-Series

6. DC OUTPUT
The output provides a SELV/PELV rated voltage, which is galvanically isolated from the input voltage.
The device is designed to supply any kind of loads, including unlimited capacitive and inductive loads.
The output is electronically protected against overload, no-load and short-circuits. In case of a protection event,
audible noise may occur.
Output voltage
Adjustment range

Factory setting output voltage

Line regulation
Load regulation

Ripple and noise voltage
Output current

PowerBoost1)

Fuse breaking current

Overload behavior
Overload/ short-circuit current
Output capacitanceBack-feeding loads

1)

Nom.
Max.

24V
24-28V
30V

Max.

35V

Guaranteed value
This is the maximum output voltage which can occur
at the clockwise end position of the potentiometer
due to tolerances. It is not a guaranteed value which
can be achieved.
Typ.
24.1V
±0.2% in “single use” mode at full load, cold unit
±0.2% in “parallel use” mode at 10A, cold unit
Typ.
24.1V
(results to 23.9V ±0.7% at 12A and 25.0V ±0.2% at no
load)
Max.
10mV
Between 3x 323 and 3x 576Vac input voltage change
Max.
100mV
Between 0 and 10A in “single use” mode, static value
Between 0 and 10A in “parallel use” mode, staticTyp.
1000mVvalue, see Fig. 6-2
Max.
50mVpp
Bandwidth 20Hz to 20MHz, 50Ohm
Nom.
10A
At 24V and up to +60°C ambient temperature
Nom.
7.5A
At 24V and +70°C ambient temperature
Nom.
8.6A
At 28V and up to +60°C ambient temperature
Nom.
6.5A
At 28V and +70°C ambient temperature
Derate linearly between +60°C and +70°C, see chapter 15
Nom.
12A
At 24V and up to +45°C ambient temperature
Nom.
10.3A
At 28V and up to +45°C ambient temperaturePowerBoost decreases linearly to nominal power between+45°C and+60°C, seechapter 15
Typ.
23A
Up to 20ms once every five seconds, see Fig. 6-1.
The fuse braking current is an enhanced transientcurrent which helps to trip fuses on faulty output
branches. The output voltage stays above 40V.
Continuous current See Fig. 6-1
Max.
23A
Continuous current, see Fig. 6-1
Typ.
6 500µF
Included inside the power supply
The unit is resistant and does not show
malfunctioning when a load feeds back voltage tothe power supply. It does not matter whether the
power supply is on or off. The absorbing energy canbe calculated according to the built-in large sized
output capacitor.

PowerBoost
This power/current is continuously allowed up to an ambient temperature of +45°C.
Above +45°C, do not use this power/current longer than a duty cycle of 10% and/or not longer than 1 minute every 10 minutes

Aug. 2022 / Rev. 2.3 DS-CT10.241-EN All values are typical figures specified at 3x 400Vac, 50Hz input voltage, symmetricalphase voltages, 24V, 10A output load, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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CT10.241, CT10.241-C1
3-PHASE, 24V, 10A, 240W

CT-Series

Fig. 6-1 Output voltage vs. output current,
typ.
Output Voltage (Single Use, typ.)Adjustment
28V
Range

Output Voltage (Parallel Use, typ.)Extracurrent
for 20ms

Factory
setting

16

28V
27V
26V

Continuous
current

12

25V

8

24V

4
0

23V
22V

Output Current

0

3

6

Adjustment
Range

29V

24
20

Fig. 6-2 Output voltage in “parallel use”
mode, typ.

9 12 15 18 21 24 27 30A

Factory
setting
Output Current

0

2

4

6

8

10

12A

7. HOLD-UP TIME
Hold-up Time

Typ.
Typ.
Min
Min.

3AC 400V
34ms
68ms
28ms
56ms

Fig. 7-1 Hold-up time vs. input voltage
Hold-up Time at 24Vdc

100ms

,
5A

in.
,m

5A

60

.
, typ
10A
n.
, mi
10A

20

At 24V, 10A, see Fig. 7-1
At 24V, 5A, see Fig. 7-1
At 24V, 10A, see Fig. 7-1
At 24V, 5A, see Fig. 7-1

Fig. 7-2 Shut-down behavior, definitions

.
typ

80

40

3AC 480V
54ms
108ms
44ms
87ms

L1 L2 L3

Input
Voltage

Hold-up Time

Input Voltage

0
320

360

400

- 5%

OutputVoltage

440 3x480Vac

Aug. 2022 / Rev. 2.3 DS-CT10.241-EN All values are typical figures specified at 3x 400Vac, 50Hz input voltage, symmetricalphase voltages, 24V, 10A output load, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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CT10.241, CT10.241-C1
3-PHASE, 24V, 10A, 240W

CT-Series

8. EFFICIENCY AND POWER LOSSES
Efficiency

Typ.
Typ.

3AC 400V
92.8%
92.4%

3AC 480V
92.9%
92.6%

Average efficiency *)

Typ.

92.2%

92.0%

Power losses

Typ.
Typ.
Typ.
Typ.

2.3W
11.8W
18.6W
23.5W

2.6W
11.8W
18.3W
22.8W

At 24V, 10A, 3-phase operation
At 24V, 10A, when using only two legs of a 3phase system, see also chapter 22.7.
25% at 2.5A, 25% at 5A, 25% at 7.5A. 25% at
10A, 3-phase operation
At 0A, 3-phase operation
At 24V, 5A, 3-phase operation
At 24V, 10A, 3-phase operation
At 24V, 12A, 3-phase operation (PowerBoost)*) The average efficiency is an assumption for a typical application where the power supply is loaded with 25% of the nominal load for 25%of the time, 50% of the nominal load for another 25% of the time, 75% of the nominal load for another 25% of the time and with 100%of the nominal load for the rest of the time.
Efficiency vs. output current at 24V,
typ., 3-phase operation

Fig. 8-1

Losses vs. output current at 24V,
typ., 3-phase operation

Fig. 8-2

Efficiency

Power Losses

93%

24W
3x400Vac
21
18
15
3x480Vac
12 3x480Vac
963x400Vac
3
Output Current
0
0
2
4
6
8
10 12A

3x480Vac
3x400Vac

92
91
90

Output Current

89
6

4

2

8

10

12A

Efficiency vs. input voltage at 24V,
10A, typ., 3-phase operation

Fig. 8-3

93.2%

Efficiency

20W

93.0

19.5

92.8

19.0

92.6

18.5

92.4

18.0

92.2
350

400

450

Power Losses

17.5

Input Voltage

92.0

Losses vs. input voltage at 24V, 10A,
typ., 3-phase operation

Fig. 8-4

Input Voltage

17.0

500 3x550Vac

350

400

450

500 3x550Vac

Aug. 2022 / Rev. 2.3 DS-CT10.241-EN All values are typical figures specified at 3x 400Vac, 50Hz input voltage, symmetricalphase voltages, 24V, 10A output load, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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CT10.241, CT10.241-C1
3-PHASE, 24V, 10A, 240W

CT-Series

9. FUNCTIONAL DIAGRAM
Fig. 9-1 Functional diagram

L1
L2
L3

DC-ok
LED
Input Fuses

PFC
Inductor

Input Filter

InrushLimiter

Input
RectifierTemperature
Shutdown

Power
Converter

OutputFilterTransient
FilterOutputPower
Manager++-

OutputVoltage
Regulator

OutputOverVoltage
Protection

VOUT
Single /Parallel

10. FRONT SIDE AND USER ELEMENTS
Fig. 10-1 Front side

A Output Terminals+
Positive output (two identical + poles)–
Negative/ return output (two identical - poles)
B

Input Terminals
L1, L2, L3 Line input
PE (Protective Earth) input

C

Output voltage potentiometer
Open the flap to adjust the output voltage. The factory setting is 24.1V

D Jumper for “Parallel Use” “Single Use”
Set the jumper to “Parallel Use” when devices are connected in parallel
to increase the output power. In order to achieve a sharing of the load
current between the individual power supplies, the “Parallel Use”
regulates the output voltage in such a manner that the voltage at noload is approx. 4% higher than at nominal load.
A missing jumper equals “Single Use” mode, which is also the factory
setting.
E

DC-OK LED (green)
On, when the output voltage is above 21V.

Aug. 2022 / Rev. 2.3 DS-CT10.241-EN All values are typical figures specified at 3x 400Vac, 50Hz input voltage, symmetricalphase voltages, 24V, 10A output load, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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CT10.241, CT10.241-C1
3-PHASE, 24V, 10A, 240W

CT-Series

11. CONNECTION TERMINALSThe terminals are IP20 Finger safe constructed and suitable for field- and factory wiring.
Input
Screw Terminal
Max. 6mm2Max. 4mm2
AWG 20-10
2.8mm
1Nm
7mm
3.5mm slotted or Phillips No 1

Type
Solid wire
Stranded wire
American Wire Gauge
Max. wire diameter (including ferrules)
Recommended tightening torque
Wire stripping length
Screwdriver

OutputScrew Terminal
Max. 6mm2Max. 4mm2
AWG 20-10
2.8mm
1Nm
7mm
3.5mm slotted or Phillips No 1

Daisy chaining:
Daisy chaining (jumping from one power supply output to the next) is allowed as long as the average output current
through one terminal pin does not exceed 25A. If the current is higher, use a separate distribution terminal block asshown in Fig. 11-2.
Fig. 11-1 Daisy chaining of outputs

Power
Supply+ + Output-

Fig. 11-2 Using distribution terminals

Power
Supply+ + --Output

Load
+

-

Power
SupplyPower
Supply

+ + -

+ + -

-

Output-OutputDistribution
Terminals
Load
+

-

max 25A!
continuous

Aug. 2022 / Rev. 2.3 DS-CT10.241-EN All values are typical figures specified at 3x 400Vac, 50Hz input voltage, symmetricalphase voltages, 24V, 10A output load, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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CT10.241, CT10.241-C1
3-PHASE, 24V, 10A, 240W

CT-Series

12. LIFETIME EXPECTANCYThe Lifetime expectancy shown in the table indicates the minimum operating hours (service life) and is determined by
the lifetime expectancy of the built-in electrolytic capacitors. Lifetime expectancy is specified in operational hours andis calculated according to the capacitor’s manufacturer specification. The manufacturer of the electrolytic capacitors
only guarantees a maximum life of up to 15 years (131 400h). Any number exceeding this value is a calculated
theoretical lifetime which can be used to compare devices.

Lifetime expectancy

Lifetime expectancy

3AC 400V
54 000h
133 000h
41 000h
151 000h
376 000h
116 000h
48 000h
134 000h
36 000h
135 000h
379 000h
102 000h

3AC 480V
62 000h
134 000h
47 000h
176 000h
379 000h
133 000h
58 000h
145 000h
42 000h
164 000h
410 000h
119 000h

At 24V, 10A and 40°C, 3-phase operation
At 24V, 5A and 40°C, 3-phase operation
At 24V, 12A and 40°C, 3-phase operation
At 24V, 10A and 25°C, 3-phase operation
At 24V, 5A and 25°C, 3-phase operation
At 24V, 12A and 25°C, 3-phase operation
At 24V, 10A and 40°C, 2-phase operation
At 24V, 5A and 40°C, 2-phase operation
At 24V, 12A and 40°C, 2-phase operation
At 24V, 10A and 25°C, 2-phase operation
At 24V, 5A and 25°C, 2-phase operation
At 24V, 12A and 25°C, 2-phase operation

13. MTBF
MTBF stands for Mean Time Between Failure, which is calculated according to statistical device failures, and indicatesreliability of a device. It is the statistical representation of the likelihood of a unit to fail and does not necessarily
represent the life of a product.
The MTBF figure is a statistical representation of the likelihood of a device to fail. A MTBF figure of e.g. 1 000 000h
means that statistically one unit will fail every 100 hours if 10 000 units are installed in the field. However, it can not
be determined if the failed unit has been running for 50 000h or only for 100h.
For these types of units the MTTF (Mean Time To Failure) value is the same value as the MTBF value.

MTBF SN 29500, IEC 61709

MTBF MIL HDBK 217F

3AC 400V
975 000h
1 706 000h
925 000h
1 633 000h
444 000h
584 000h
100 000h
132 000h
436 000h
555 000h
98 000h
129 000h

3AC 480V
985 000h
1 723 000h
939 000h
1 656 000h
428 000h
563 000h
100 000h
132 000h
423 000h
572 000h
98 000h
129 000h

At 24V, 10A and 40°C, 3-phase operation
At 24V, 10A and 25°C, 3-phase operation
At 24V, 10A and 40°C, 2-phase operation
At 24V, 10A and 25°C, 2-phase operation
At 24V, 10A and 40°C, 3-phase Ground Benign GB40
At 24V, 10A and 25°C, 3-phase Ground Benign GB25
At 24V, 10A and 40°C, 3-phase Ground Fixed GF40
At 24V, 10A and 25°C, 3-phase Ground Fixed GF25
At 24V, 10A and 40°C, 2-phase Ground Benign GB40
At 24V, 10A and 25°C, 2-phase Ground Benign GB25
At 24V, 10A and 40°C, 2-phase Ground Fixed GF40
At 24V, 10A and 25°C, 2-phase Ground Fixed GF25

Aug. 2022 / Rev. 2.3 DS-CT10.241-EN All values are typical figures specified at 3x 400Vac, 50Hz input voltage, symmetricalphase voltages, 24V, 10A output load, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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3-PHASE, 24V, 10A, 240W

CT-Series

14. EMCThe EMC behavior of the device is designed for applications in industrial environment as well as in residential,commercial and light industry environments. The output is allowed to be grounded or floating.
The device is investigated according to the generic standards EN 61000-6-1, EN 61000-6-2, EN 61000-6-3 and EN 610006-4.
Without additional measures to reduce the conducted emissions on the output (e.g. by using a filter), thedevice is not suited to supply a local DC power network in residential, commercial and light-industrial
environments. No restrictions apply for local DC power networks in industrial environments.
EMC Immunity
Electrostatic discharge

EN 61000-4-2

Electromagnetic RF field
Fast transients (Burst)

EN 61000-4-3
EN 61000-4-4

Surge voltage on input

EN 61000-4-5

L1  L2, L2  L3, L1  L3
L1 / L2 / L3  PE

Surge voltage on output

EN 61000-4-5

Conducted disturbance
Mains voltage dips
(Dips on three phases)
Mains voltage dips
(Dips on two phases)

EN 61000-4-6
EN 61000-4-11++ / -  PE
0.15-80MHz
0% of 380Vac
0% of 480Vac
40% of 380Vac
40% of 480Vac
70% of 380Vac
70% of 480Vac

Voltage interruptions
Powerful transients

EN 61000-4-11
VDE 0160

EN 61000-4-11

Contact discharge
Air discharge
80MHz-2.7GHz
Input lines
Output lines

Over entire load range

8kV
15kV
10V/m
4kV
2kV
2kV
4kV

Criterion A
Criterion A
Criterion A
Criterion A
Criterion A
Criterion A
Criterion A

500V
1kV
10V
0Vac, 20ms
0Vac, 20ms
200ms
200ms
500ms
500ms
5s
1550V, 1.3ms

Criterion A
Criterion A
Criterion A
Criterion A
Criterion A
Criterion A
Criterion A
Criterion A
Criterion A
Criterion C
Criterion A

Criterions:
A: The device shows normal operation behavior within the defined limits.
C: Temporary loss of function is possible. The device may shut down and restarts by itself. No damage or hazards for the device will occur.

EMC Emission
Conducted emission
input lines
Radiated emission
Harmonic input current
Voltage fluctuations, flicker

EN 55011, EN 55032, FCC Part 15, CISPR 11, CISPR 32

Class BEN 55011, EN 55032
EN 61000-3-2
EN 61000-3-3Class B
Fulfilled for Class A equipment
Fulfilled, tested with constantcurrent loads, non pulsing

This device complies with FCC Part 15 rules.
Operation is subjected to following two conditions: (1) this device may not cause harmful interference, and (2) thisdevice must accept any interference received, including interference that may cause undesired operation.
Switching Frequency
Main converter

60kHz to 140kHz

Output load and input voltage dependentAug. 2022 / Rev. 2.3 DS-CT10.241-EN All values are typical figures specified at 3x 400Vac, 50Hz input voltage, symmetricalphase voltages, 24V, 10A output load, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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3-PHASE, 24V, 10A, 240W

CT-Series

15. ENVIRONMENTThe operational temperature is the ambient or
surrounding temperature and is defined as the
air temperature 2cm below the device.
-40°C to +85°C
For storage and transportation
6W/K
Between +60°C and +70°C
15W/1000m or 5K/1000m
For altitudes >2000m, see Fig. 15-2
9W/-5kPa or 3°C/-5kPa
For atmospheric pressures <80kPa, see Fig. 15-2
The derating is not hardware controlled. The customer has to take care by himself tostay below the derated current limits in order not to overload the unit.
5 to 95% r.h.
According to IEC 60068-2-30
110-47kPa
See Fig. 15-2 for details
Up to 6000m
See Fig. 15-2 for details
According to IEC 60664-1 for altitudes up to
III
2000m
According to IEC 60664-1 for altitudes fromII
2000 to 6000m and atmospheric pressuresfrom 80 to 47kPa
2
According to IEC 62477-1, not conductive
2-17.8Hz: ±1.6mm;
According to IEC 60068-2-6
17.8-500Hz: 2g
2 hours / axis
30g 6ms, 20g 11ms
According to IEC 60068-2-27
3 bumps / direction, 18 bumps in total
Shock and vibration is tested in combination with DIN rails according to EN 60715 with aheight of 15mm and a thickness of 1.3mm and standard orientation.
Some audible noise may be emitted from the power supply during no load, overload or
short circuit.

Operational temperature-25°C to +70°C

Storage temperature
Output derating

Humidity
Atmospheric pressure
AltitudeOver-voltage category

Degree of pollution
Vibration sinusoidal

Shock

Audible noise

Fig. 15-1 Output current vs. ambient temp.
(Inom = 10A; Iout with PowerBoost = 12A)

Allowed Output Current at 24V

Allowed Output Current at 24V

12A

12A
B

A

10A

A... Continuous
B... Short term

6A
4A
0
-25

C
B

10A

A

8A

8A

2A

Fig. 15-2 Output current vs. altitude at 24V

6A
4A
2A

Ambient Temperature

0

20

40

60 70°C

A... Ambient < 60°C
B... Ambient < 45°C
C... Short term

Altitude 0mAP*) 110kPa

2000m
80kPa

*) Atmospheric pressure

4000m
62kPa

6000m
47kPa

Aug. 2022 / Rev. 2.3 DS-CT10.241-EN All values are typical figures specified at 3x 400Vac, 50Hz input voltage, symmetricalphase voltages, 24V, 10A output load, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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3-PHASE, 24V, 10A, 240W

CT-Series

16. SAFETY AND PROTECTION FEATURES
Isolation resistanceAt delivered condition between input and output,
measured with 500Vdc
At delivered condition between input and PE,
measured with 500Vdc
At delivered condition between output and PE,
measured with 500Vdc
At delivered condition between output and DC-OK
contacts, measured with 500Vdc
Resistance between PE terminal and the housing in
the area of the DIN rail mounting bracket.

Min.

500MOhm

Min.

500MOhm

Min.

500MOhm

Min.

500MOhm

PE resistanceMax.

0.1OhmOutput over-voltage protection

Typ.
Max.

30.5Vdc
32Vdc
In case of an internal defect, a redundant circuit limits the maximum
output voltage. The output shuts down and automatically attempts torestart.
I
According to IEC 61140
A PE (Protective Earth) connection is required
IP 20
According to EN/IEC 60529
Output shuts down with automatic restart.
Included
Temperature sensors are installed on criticalcomponents inside the unit and turn the unit off insafety critical situations, which can happen e.g.
when ambient temperature is too high, ventilation
is obstructed or the derating requirements are notfollowed. There is no correlation between theoperating temperature and turn-off temperaturesince this is dependent on input voltage, load andinstallation methods.
MOV (Metal
For protection values see chapter 14 (EMC).
Oxide Varistor)
Not user replaceable slow-blow high-braking
Includedcapacity fuse
0.17mAAt 3x 400Vac, 50Hz, TN-,TT-mains
0.24mAAt 3x 480Vac, 60Hz, TN-,TT-mains
0.22mAAt 3x 440Vac, 60Hz, TN-,TT-mains
0.31mAAt 3x 528Vac, 50Hz, TN-,TT-mains

Class of protection
Degree of protection
Over-temperature protection

Input transient protection
Internal input fuse
Touch current (leakage current)

Typ.
Typ.
Max.
Max.

Aug. 2022 / Rev. 2.3 DS-CT10.241-EN All values are typical figures specified at 3x 400Vac, 50Hz input voltage, symmetricalphase voltages, 24V, 10A output load, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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CT10.241, CT10.241-C1
3-PHASE, 24V, 10A, 240W

CT-Series

17. DIELECTRIC STRENGTH
The output voltage is floating and has no ohmic connection to the ground.
The output is insulated to the input by a double or reinforced insulation.
Type and routine tests are conducted by the manufacturer. Field tests may be conducted in the field using theappropriate test equipment which applies the voltage with a slow ramp (2s up and 2s down). Connect all inputterminals together as well as all output poles before conducting the test. When testing, set the cut-off current settings
to the value in the table below.
Fig. 17-1 Dielectric strength

Input
L1
L2
L3

B

A
Earth

Output+C-

Type test

60s

Routine test

5s

Field test
5s
Cut-off current setting
for field test

A
2500Vac

B
3000Vac

C
500Vac2500Vac

2500Vac

500Vac2000Vac

2000Vac

500Vac> 10mA> 10mA> 30mA

It is recommend that either the + pole, the – pole or any other partof the output circuit shall be connected to the earth/groundsystem. This helps to avoid situations in which a load starts
unexpectedly or can not be switched off when unnoticed earth
faults occur.

Aug. 2022 / Rev. 2.3 DS-CT10.241-EN All values are typical figures specified at 3x 400Vac, 50Hz input voltage, symmetricalphase voltages, 24V, 10A output load, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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CT10.241, CT10.241-C1
3-PHASE, 24V, 10A, 240W

CT-Series

18. APPROVED, FULFILLED OR TESTED STANDARDSUL 508

IEC 61010-2-201

IEC 60950-1

UL 60950-1

Class I Div 2 (CT10.241)

Marine (DNV)

Marine (ABS)

SEMI F47

VDMA 24364

UL Certificate
Listed equipment for category NMTR - Industrial Control
Equipment
Applicable for US and Canada
E-File: E198865
Manufacturer's Declaration
Electrical Equipment for Measurement, Control andLaboratory Use - Particular requirements for control
equipment
CB Scheme Certificate
General safety requirements for Information Technology
Equipment (ITE)UL Certificate
Recognized component for category QQGQ Information Technology Equipment (ITE)
Applicable for US and Canada
E-File: E137006
CSA Certificate
Power Supplies for Hazardous Location
Applicable for Canada and US
CSA Class: 5318-01 (Canada), 5318-81 (USA)
Temperature Code: T3
Groups: A, B, C and D
DNV Certificate
DNV Type approved product
Certificate: TAA00002YX
Temperature: Class D
Humidity: Class B
Vibration: Class C
EMC: Class B
Enclosure: Class A
ABS Design Assessment Certificate
ABS (American Bureau of Shipment) assessed product
Certificate: 17-HG1599236-PD
Test Report
Voltage Sag Immunity for Semiconductor Processing
Equipment
Tested for AC 208V L-L or L-N mains voltages, nominal
output voltage and nominal output load
Paint Wetting Impairment Substances Test (or LABS-Test)
Tested for Zone 2 and test class C1 according to VDMA
24364-C1-L/W for solvents and water-based paints

Aug. 2022 / Rev. 2.3 DS-CT10.241-EN All values are typical figures specified at 3x 400Vac, 50Hz input voltage, symmetricalphase voltages, 24V, 10A output load, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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3-PHASE, 24V, 10A, 240W

CT-Series

19. REGULATORY PRODUCT COMPLIANCE
EU Declaration ofConformity

REACH Regulation (EU)

WEEE Directive (2012/19/EU)

KC Koran Certificate(CT10.241)

The CE mark indicates conformance with the- EMC directive- Low-voltage directive- RoHS directive
Manufacturer's Declaration
EU regulation regarding the Registration, Evaluation,
Authorisation and Restriction of Chemicals (REACH)
fulfilled.
EU Regulation (EC) 1907/2006.
Manufacturer's Statement
EU-Directive on Waste Electrical and Electronic
Equipment (WEEE)
Registered in Germany as business to business (B2B)
products.
WEEE-Reg.-Nr. DE 55837529
KC Korean Certification
Korean - Registration of Broadcasting andCommunication Equipment
Registered under Clause3, Article 58-2 of Radio Waves
Act.
Registration No. R-R-PUG-CT10_241

Aug. 2022 / Rev. 2.3 DS-CT10.241-EN All values are typical figures specified at 3x 400Vac, 50Hz input voltage, symmetricalphase voltages, 24V, 10A output load, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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CT10.241, CT10.241-C1
CT-Series

3-PHASE, 24V, 10A, 240W

20. PHYSICAL DIMENSIONS AND WEIGHT
Width
HeightDepth

WeightDIN rail
Housing material
Installation clearances
Penetration protection

62mm 2.44’’124mm 4.88’’
117mm 4.61’’
The DIN rail depth must be added to the unit depth to calculate the total required
installation depth.
750g / 1.65lb
Use 35mm DIN rails according to EN 60715 or EN 50022 with a height of 7.5 or 15mm.
Body: Aluminium alloy
Cover: Zinc-plated steel
See chapter 2
Small parts like screws, nuts, etc. with a diameter larger than 3.5mm

Fig. 20-1 Front viewFig. 20-2 Side viewAll dimensions in mm

All dimensions in mm

Aug. 2022 / Rev. 2.3 DS-CT10.241-EN All values are typical figures specified at 3x 400Vac, 50Hz input voltage, symmetricalphase voltages, 24V, 10A output load, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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3-PHASE, 24V, 10A, 240W

CT-Series

21. ACCESSORIES
21.1. ZM1.WALL - WALL/PANEL MOUNT BRACKET
These brackets are used to mount the device on a flat surface or panel without utilizing a DIN rail.
The two aluminum brackets and the black plastic slider of the unit have to be detached, so that the steel brackets canbe mounted in the holes of the aluminum brackets.
The order number ZM1.WALL contains two brackets needed for one device.
Fig. 21-1 ZM1.Wall

Fig. 21-2 Hole patternFig. 21-3 Side viewAll dimensions in mm

All dimensions in mm

Fig. 21-4 Isometric viewFig. 21-5 Isometric viewFig. 21-6 Isometric view

Aug. 2022 / Rev. 2.3 DS-CT10.241-EN All values are typical figures specified at 3x 400Vac, 50Hz input voltage, symmetricalphase voltages, 24V, 10A output load, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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3-PHASE, 24V, 10A, 240W

CT-Series

21.2. ZM13.SIDE - SIDE MOUNT BRACKETThis ZM13.SIDE bracket is used to mount the device sideways with or without utilizing a DIN rail to save installation
depth.
The two aluminum brackets and the black plastic slider of the unit have to be detached, so that the ZM13.SIDE steel
bracket can be mounted.
For sideway DIN rail mounting, the removed aluminum brackets and the black plastic slider need to be mounted on
the ZM13.SIDE steel bracket.
Fig. 21-7 ZM13.SIDE

Fig. 21-9
Side mounting
without DIN rail brackets

Fig. 21-8
Mounting instructions

Fig. 21-10
Side mounting
with DIN rail brackets

Fig. 21-11
Hole pattern

All dimensions in mm

Aug. 2022 / Rev. 2.3 DS-CT10.241-EN All values are typical figures specified at 3x 400Vac, 50Hz input voltage, symmetricalphase voltages, 24V, 10A output load, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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CT-Series

3-PHASE, 24V, 10A, 240W

21.3. YRM2.DIODE - REDUNDANCY MODULESThe YRM2.DIODE is a dual redundancy module, which can be used to build 1+1 or N+1
redundant systems.
The device is equipped with two input channels each 10A nominal, which are individually
decoupled by utilizing diode technology. The output can be loaded with nominal 20A.
The device does not require an additional auxiliary voltage and is self-powered even in caseof a short circuit across the output.
The device has a monitoring circuit included and is the perfect choice when the power supply
has no DC-OK function. Two LEDs and two relay contacts signal when one of the two input
voltages is not in range due to a non-functioning or disconnected power supply.
The unit is very slender and only requires 32mm width on the DIN rail.
See chapter 22.6 for wiring information.

Aug. 2022 / Rev. 2.3 DS-CT10.241-EN All values are typical figures specified at 3x 400Vac, 50Hz input voltage, symmetricalphase voltages, 24V, 10A output load, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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3-PHASE, 24V, 10A, 240W

CT-Series

22. APPLICATION NOTES
22.1. PEAK CURRENT CAPABILITY
The unit can deliver peak currents (up to several milliseconds) which are higher than the specified short term currents.
This helps to start current demanding loads. Solenoids, contactors and pneumatic modules often have a steady state
coil and a pick-up coil. The inrush current demand of the pick-up coil is several times higher than the steady-state
current and usually exceeds the nominal output current (including the PowerBoost). The same situation applies whenstarting a capacitive load.
The peak current capability also ensures the safe operation of subsequent circuit breakers of load circuits. The loadbranches are often individually protected with circuit breakers or fuses. In case of a short or an overload in one branch
circuit, the fuse or circuit breaker need a certain amount of over-current to open in a timely manner. This avoids
voltage loss in adjacent circuits.
The extra current (peak current) is supplied by the power converter and the built-in large sized output capacitors of
the power supply. The capacitors get discharged during such an event, which causes a voltage dip on the output. The
following examples show typical voltage dips for resistive loads:
Fig. 22-1 20A peak current for 50ms, typ.
(2x the nominal current)

Peak current voltage dips

Typ.
Typ.
Typ.

Fig. 22-2 50A peak current for 5ms, typ.
(5x the nominal current)

from 24V to 6V
from 24V to 12V
from 24V to 3V

At 20A for 50ms, resistive load
At 50A for 2ms, resistive load
At 50A for 5ms, resistive load

Aug. 2022 / Rev. 2.3 DS-CT10.241-EN All values are typical figures specified at 3x 400Vac, 50Hz input voltage, symmetricalphase voltages, 24V, 10A output load, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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3-PHASE, 24V, 10A, 240W

CT-Series

22.2. OUTPUT CIRCUIT BREAKERS
Standard miniature circuit breakers (MCB’s or UL 1077 circuit breakers) are commonly used for AC-supply systems andmay also be used on 24V branches.
MCB’s are designed to protect wires and circuits. If the ampere value and the characteristics of the MCB are adapted to
the wire size that is used, the wiring is considered as thermally safe regardless of whether the MCB opens or not.
To avoid voltage dips and under-voltage situations in adjacent 24V branches which are supplied by the same source, afast (magnetic) tripping of the MCB is desired. A quick shutdown within 10ms is necessary corresponding roughly tothe ride-through time of PLC's. This requires power supplies with high current reserves and large output capacitors.
Furthermore, the impedance of the faulty branch must be sufficiently small in order for the current to actually flow.
The best current reserve in the power supply does not help if Ohm’s law does not permit current flow. The following
table has typical test results showing which B- and C-Characteristic MCBs magnetically trip depending on the wire crosschapter and wire length.
The following test results indicate the maximal wire length for a magnetic (fast) tripping. The wire length is always
two times the distance to the load (+ and – wire).
Fig. 22-3 Test circuit for maximum wire length

Power
Supply

MCB

Load

+

AC

+
Wire length

DC

S1

-

-

S1...... Fault Simulation Switch

Test results for maximum wire length:0.75mm²
23m
18m
6m
3m
2m
1m
9m
4m
3m

C-2A
C-3A
C-4A
C-6A
C-8A
C-10A
B-6A
B-10A
B-13A

1.0mm²
28m
23m
12m
4m
3m
2m
14m
5m
4m

1.5mm²
43m
34m
18m
6m
4m
3m
19m
6m
5m

2.5mm²
69m
54m
28m
7m
5m
4m
33m
9m
8m

22.3. CHARGING OF BATTERIESThe power supply can be used to charge lead-acid or maintenance free batteries. Two 12V SLA or VRLA batteries areneeded in series connection.
Instructions for charging batteries:a)Ensure that the ambient temperature of the power supply stays below 45°C.

b)

Set the output voltage, measured at no load and at the battery end of the cable, very precisely to the end-ofcharge voltage.
End-of-charge voltage

27.8V

27.5V

27.15V

26.8V

Battery temperature

10°C

20°C

30°C

40°C

c)

Use a 16A circuit breaker or a blocking diode between the power supply and the battery.

d)Ensure that the output current of the power supply is below the allowed charging current of the battery.

e)

Use only matched batteries when putting 12V types in series.

f)

The return current to the power supply is typically 8mA. This return current can discharge the battery when the
power supply is switched off except in case a blocking diode is utilized.

Aug. 2022 / Rev. 2.3 DS-CT10.241-EN All values are typical figures specified at 3x 400Vac, 50Hz input voltage, symmetricalphase voltages, 24V, 10A output load, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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CT-Series

3-PHASE, 24V, 10A, 240W

22.4. SERIES OPERATION

Unit A

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 apotential above 60Vdc must be installed with a protection against touching.

AC
DC

Avoid return voltage (e.g. from a decelerating motor or battery) which isapplied to the output terminals.

++

Unit BAC

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 thestandard mounting orientation.

DC

+
-

Load

-

Pay attention that leakage current, EMI, inrush current, harmonics will increase when using multiple devices.

22.5. PARALLEL USE TO INCREASE OUTPUT POWER

Unit A

Devices can be paralleled to increase the output power. The output voltageof 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 “ParallelUse” 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 isapprox. 4% higher than at nominal load.

AC
DC

+
+

Unit BAC

The ambient temperature is not allowed to exceed +60°C.

DC

+
-

Load

-

If more than three units are connected in parallel, a fuse or circuit breakerwith a rating of 15A or 16A 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 devices on top of eachother. 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).
Pay attention that leakage current, EMI, inrush current, harmonics will increase when using multiple devices.

Aug. 2022 / Rev. 2.3 DS-CT10.241-EN All values are typical figures specified at 3x 400Vac, 50Hz input voltage, symmetricalphase voltages, 24V, 10A output load, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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CT10.241, CT10.241-C1
3-PHASE, 24V, 10A, 240W

CT-Series

22.6. PARALLEL USE FOR REDUNDANCY
1+1 Redundancy:
Devices can be paralleled for redundancy to gain higher system availability. Redundant systems require a certain
amount of extra power to support the load in case one device fails. The simplest way is to put two devices in parallel.
This is called a 1+1 redundancy. In case one device fails, the other one is automatically able to support the load current
without any interruption. It is essential to use a redundancy module to decouple devices from each other. This
prevents that the defective unit becomes a load for the other device and the output voltage cannot be maintained any
more.
For 1+1 redundancy the ambient temperature is not allowed to exceed +70°C.
Recommendations for building redundant power systems:- Use separate input fuses for each device.
- Use separate mains systems for each device whenever it is possible.
- Monitor the outputs of the individual devices. Use the DC-OK contact, which is included in the redundancy module.
- It is desirable to set the output voltages of all devices to the same value (± 100mV) or leave it at the factory setting.
- Set the devices into “Parallel Use” mode.
Pay attention that leakage current, EMI, inrush current, harmonics will increase when using multiple devices.
N+1 Redundancy:
Redundant systems for a higher power demand are usually built in a N+1 method. E.g. four devices, each rated for 10A
are paralleled to build a 30A redundant system.
Pay attention that leakage current, EMI, inrush current, harmonics will increase when using multiple devices.
Keep an installation clearance of 15mm (left / right) between two devices and avoid installing the devices on top ofeach other.
Do not use devices in parallel in mounting orientations other than the standard mounting orientation or in any othercondition, where a reduction of the output current is required.
For 1+1 redundancy the ambient temperature is not allowed to exceed +60°C.
Wiring examples for 1+1 and n+1 redundancy:
Fig. 22-5 N+1 Redundant configuration for 30A load current with multiple power
supplies and redundancy modules

Fig. 22-4 1+1 Redundant configuration for
10A load current and redundancy modules

FailureMonitorFailureMonitor+ + - Output+- +- o oo oInput Input
1 2
2
1
Input ok

+ + - Output+-+- o oo oInput Input
1 2
2
1
Input ok

+ + - Output+- +- o oo oInput Input
1 2
2
1
Input ok

+ + - Output+- +- o oo oInput Input
1 2
2
1
Input ok

+ + - Output+- +- o oo oInput Input
1 2
2
1
Input ok

+ + - Output+- +- o oo oInput Input
1 2
2
1
Input okPower
SupplyYRM2.DIODE

Power
SupplyYRM2.DIODE

Power
SupplyYRM2.DIODE

Power
SupplyYRM2.DIODE

Power
SupplyYRM2.DIODE

Power
SupplyYRM2.DIODE

I

I

I

L1 L2 L3 PE

I

Load

L1
L2
L3
PE

I

I

Output+-Input

L1 L2 L3 PE

I

I

I

Output+-Input

L1 L2 L3 PE

I

I

I

Redundancy
ModuleOutput+-Input

L1 L2 L3 PE

I

I

I

Output+-LoadAug. 2022 / Rev. 2.3 DS-CT10.241-EN All values are typical figures specified at 3x 400Vac, 50Hz input voltage, symmetricalphase voltages, 24V, 10A output load, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0

Redundancy
Moduleoptional

I

Input

Output+-Redundancy
ModuleoptionalI

Input

L1 L2 L3 PE

Redundancy
Moduleoptional

I

L1
L2
L3
PE

Output+-Redundancy
Moduleoptional

Input

L1 L2 L3 PE

Redundancy
ModuleGermany

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CT10.241, CT10.241-C1
3-PHASE, 24V, 10A, 240W

CT-Series

22.7. OPERATION ON TWO PHASES

L1
L2
L3
PE

No external protection device is required to protect against a phase-loss
failure.

Power Supply

AC
L1

The power supply is allowed to run permanently on only two legs of a 3phase system, when the output power is reduced according to the curves
below. A long-term exceeding of these limits will result in a thermal shutdown of the device.

L2
open

L3

DC

Pay attention that EMC performance, hold-up time and losses differ from a three phase operation. Therefore, checksuitability of your individual application.
Using only two legs of a 3-phase system is only included in the IEC/UL 60950-1 approval.
Fig. 22-6 Allowed output current for use on
only two legs of a 3-phase system

Fig. 22-7 Hold-up time for use on only twolegs of a 3-phase system
Hold-up Time at 24Vdc

Allowed Output Current at 24V

12A

A

10

B

8

100ms

,
5A

80

,
5A

60

6

A... 2x 340-576Vac
B... 2x 320-340Vac

4

40

Ambient Temperature

0
-25

0

20

40

,
10A

typ.
.
min

Input Voltage

060 70°C

n.
mi

,
10A

20

2

.
t yp

320

360

400

440 2x480Vac

Fig. 22-8 Efficiency vs. output current at 24Vfor use on only two legs of a 3-phase system

Fig. 22-9 Losses vs. output current at 24V for
use on only two legs of a 3-phase system

Efficiency

Power Losses

94%

24W

93

20

2x400Vac92
91

2x480Vac

2x400Vac

16122x480Vac

90

8

89

4

Output Current

88
2

4

6

8

Output Current

0
10

12A

0

2

4

6

8

10

12A

Aug. 2022 / Rev. 2.3 DS-CT10.241-EN All values are typical figures specified at 3x 400Vac, 50Hz input voltage, symmetricalphase voltages, 24V, 10A output load, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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27/28

CT10.241, CT10.241-C1
3-PHASE, 24V, 10A, 240W

CT-Series

22.8. USE IN A TIGHTLY SEALED ENCLOSURE
When the device is installed in a tightly sealed enclosure, the temperature inside the enclosure will be higher thanoutside. 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 thebox. 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.
Enclosure size

Input voltage
Load
Temperature inside the box
Temperature outside the box
Temperature rise

Case A
180x180x165mm
Rittal Typ IP66 Box
PK 9519 100,plastic
3x 400Vac
24V, 8A; (=80%)
48.4°C
24.5°C
23.9K

Case B
180x180x165mm
Rittal Typ IP66 Box
PK 9519 100,plastic
3x 400Vac
24V, 10A; (=100%)
54.7°C
24.9°C
29.8K

Aug. 2022 / Rev. 2.3 DS-CT10.241-EN All values are typical figures specified at 3x 400Vac, 50Hz input voltage, symmetricalphase voltages, 24V, 10A output load, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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28/29

CT10.241, CT10.241-C1
3-PHASE, 24V, 10A, 240W

CT-Series

22.9. MOUNTING ORIENTATIONSMounting orientations other than input terminals on the bottom and output on the top require a reduction incontinuous output power or a limitation in the maximum allowed ambient temperature.
The listed lifetime and MTBF values from this datasheet apply only for the standard mounting orientation.
The following curves give an indication for allowed output currents for altitudes up to 2000m.
Fig. 22-10
Mounting
Orientation A(Standardorientation)

Allowed Output Current at 24V
OUTPUT

12A
10A

Power
Supply

7.5A
0

INPUT

+45

+60 +70°C

Ambient Temperature

Fig. 22-11
Mounting
Orientation B(Upside down)

Allowed Output Current at 24V

12A

INPUT

7.5A

Power
Supply0

OUTPUT

Fig. 22-12
Mounting
Orientation C(Table-top
mounting)

12A
6.5A

+25

+60 +70°C

Ambient Temperature

Allowed Output Current at 24V

12A
OUTPUT

Power
Supply

INPUT

6.5A
0

+25

+60 +70°C

Ambient Temperature

Allowed Output Current at 24V

INPUT

Power
Supply12A
OUTPUT

Fig. 22-14
Mounting
Orientation E(Horizontal ccw)

+60 +70°C

Ambient Temperature

Allowed Output Current at 24V

0

Fig. 22-13
Mounting
Orientation D(Horizontal cw)

+30

6.5A
0

+25

+60 +70°C

Ambient Temperature

Aug. 2022 / Rev. 2.3 DS-CT10.241-EN All values are typical figures specified at 3x 400Vac, 50Hz input voltage, symmetricalphase voltages, 24V, 10A output load, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0Germany

29/29