CT10.241, CT10.241-C1
CT-Series
3-PHASE, 24V, 10A, 240W
May 2018 / Rev. 2.0a DS-CT10.241-EN All values are typical figures specified at 3x 400Vac, 50Hz input voltage, symmetrical
phase voltages, 24V, 10A output load, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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P
OWER SUPPLY
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
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
P
RODUCT DESCRIPTION
The Dimension C-Series are cost optimized power
supplies without compromising quality, reliability and
performance. The C-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 is
achieved by a synchronous rectification and further
technological design details.
The CT10.241-C1 is equipped with conformal coated pcboards preferred for applications in harsh areas.
The C-Series includes all the essential basic functions.
The devices have a power reserve of 20% included,
which may even be used continuously at temperatures
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.
S
HORT-FORM DATA
Output voltage
DC 24V Nominal
Adjustment range
24 - 28V Factory setting 24.1V
Output current
12.0 - 10.3A Below +45°C ambient
10.0 - 8.6A
At +60°C ambient
7.5 – 6.5A At +70°C ambient
Derate linearly between +45°C and +70°C
Input voltage AC
3AC 380-480V -15%/+20%
Mains frequency
50-60Hz
±6%
Input current AC
0.7 / 0.6A At 3x400 / 480Vac
Power factor
0.53 / 0.52
At 3x400 / 480Vac
AC Inrush current
4 / 4Apk
At 3x400 / 480Vac
Efficiency
92.8 / 92.9% At 3x400 / 480Vac
Losses
18.6 / 18.3W
At 3x400 / 480Vac
Hold-up time
34 / 54ms
At 3x400 / 480Vac
Temperature range
-25°C to +70°C
Size (WxHxD)
62x124x117mm Without DIN-rail
Weight
750g / 1.65lb
O
RDER NUMBERS
Power Supply CT10.241
CT10.241-C1 With conformal coated
pc-boards
Mechanical Accessory
ZM1.WALL Wall/panel mount bracket
ZM13.SIDE Side mount bracket
M
AIN APPROVALS
For details or a complete approval list see section 18.
IND. CONT. EQ.
UL 60950-1
CT10.241, CT10.241-C1
CT-Series
3-PHASE, 24V, 10A, 240W
May 2018 / Rev. 2.0a DS-CT10.241-EN All values are typical figures specified at 3x 400Vac, 50Hz input voltage, symmetrical
phase voltages, 24V, 10A output load, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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I
NDEX
Page 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. Approvals ........................................................... 17
19. Other Fulfilled Standards ................................. 17
20. Physical Dimensions and Weight ..................... 18
21. Accessories ........................................................ 19
21.1. ZM1.WALL – Wall/Panel Mount Bracket . 19
21.2. ZM13.SIDE - Side Mount Bracket ............. 20
21.3. YRM2.DIODE - Redundancy Modules ...... 21
22. Application Notes ............................................. 22
22.1. Peak Current Capability ........................... 22
22.2. Output Circuit Breakers ............................ 23
22.3. Charging of Batteries ............................... 23
22.4. Series Operation ....................................... 24
22.5. Parallel Use to Increase Output Power .... 24
22.6. Parallel Use for Redundancy .................... 25
22.7. Operation on Two Phases ........................ 26
22.8. Use in a Tightly Sealed Enclosure ............ 27
22.9. Mounting Orientations ............................ 28
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 the
word. As the state of our knowledge and experience is constantly changing, the information in this data sheet is
subject to revision. We therefore kindly ask you to always use the latest issue of this document (available under
www.pulspower.com).
No part of this document may be reproduced or utilized in any form without our prior permission in writing.
T
ERMINOLOGY AND ABBREVIATIONS
PE and symbol PE 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 with
standard tolerances (usually ±15%) included.
E.g.: DC 12V describes a 12V battery disregarding whether it is full (13.7V) or flat (10V)
400Vac A 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.
should A key word indicating flexibility of choice with a strongly preferred implementation.
CT10.241, CT10.241-C1
CT-Series
3-PHASE, 24V, 10A, 240W
May 2018 / Rev. 2.0a DS-CT10.241-EN All values are typical figures specified at 3x 400Vac, 50Hz input voltage, symmetrical
phase voltages, 24V, 10A output load, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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1. I
NTENDED USE
This device is designed for installation in an enclosure and is intended for the general professional use such as in
industrial control, office, communication, and instrumentation equipment.
Do not use this power supply in equipment, where malfunction may cause severe personal injury or threaten human
life.
2. I
NSTALLATION INSTRUCTIONS
WARNING
Risk of electrical shock, fire, personal injury or death.
- Do not use the power supply without proper grounding (Protective Earth). Use the terminal on the input block for
earth connection and not one of the screws on the housing.
- Turn power off before working on the device. Protect against inadvertent re-powering.
- Do not modify or repair the unit.
- Do not open the unit as high voltages are present inside.
- Use caution to prevent any foreign objects from entering into 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 surface 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 an
internal 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 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 this document for use above
2000m (6560ft).
CT10.241, CT10.241-C1
CT-Series
3-PHASE, 24V, 10A, 240W
May 2018 / Rev. 2.0a DS-CT10.241-EN All values are typical figures specified at 3x 400Vac, 50Hz input voltage, symmetrical
phase voltages, 24V, 10A output load, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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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.
CT10.241, CT10.241-C1
CT-Series
3-PHASE, 24V, 10A, 240W
May 2018 / Rev. 2.0a DS-CT10.241-EN All values are typical figures specified at 3x 400Vac, 50Hz input voltage, symmetrical
phase voltages, 24V, 10A output load, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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3. AC-I
NPUT
The device is suitable to be supplied from TN-, TT- and IT mains networks with AC voltage. Grounding of one phase is
allowed 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.
AC input
Nom. 3AC 380-480V
AC input range
Min.
3x 323-576Va
Continuous operation
Min. 3x 576-700Vac For maximal 1s (occasional)
Allowed voltage L or N to earth
Max. 500Vac Continuous operation, according to IEC 62477-1
Input frequency
Nom. 50–60Hz ±6%
Turn
-on voltage Typ. 3x 260Vac Steady-state value, see Fig. 3-1
Shut
-down voltage Typ. 3x 185Vac Steady-state value, see Fig. 3-1
Ex
ternal input protection See recommendations in chapter 2.
3AC 400V 3AC 480V
Input current
Typ. 0.7A 0.6A At 24V, 10A, per phase, see Fig. 3-3
Power factor
Typ. 0.53 0.52 At 24V, 10A, see Fig. 3-4
Start
-up delay Typ. 90ms 90ms See Fig. 3-2
Rise time
Typ. 40ms 40ms At 24V, 10A const. current load, 0mF load
capacitance, see Fig. 3-2
Typ. 85ms 85ms At 24V, 10A const. current load, 10mF load
capacitance, see Fig. 3-2
Turn
-on overshoot Max. 200mV 200mV See Fig. 3-2
Fig. 3-1 Input voltage range Fig. 3-2 Turn-on behavior, definitions
Turn-on
323V
Rated input
range
V
IN
P
OUT
185V 576V
Shut-down
260V 3x700Vac
< 1s
Start-up
delay
Rise
Time
Overshoot
- 5%
Output
Voltage
Input
Voltage
Fig. 3-3 Input current vs. output load at 24V Fig. 3-4 Power factor vs. output load
12A
0 2 4 6 8 10
0
0.1
0.2
0.3
0.4
0.8A
Input Current, typ.
0.5
Output Current
3x 400Vac
3x 480Vac
0.6
0.7
Power Factor, typ.
0 2 4 6 8 10 12A
0.35
0.4
0.45
0.5
0.55
0.6
3x
400Vac
3x
480Vac
Output Current
CT10.241, CT10.241-C1
CT-Series
3-PHASE, 24V, 10A, 240W
May 2018 / Rev. 2.0a DS-CT10.241-EN All values are typical figures specified at 3x 400Vac, 50Hz input voltage, symmetrical
phase voltages, 24V, 10A output load, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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4. DC-I
NPUT
Do not use the power supply with DC-input voltages.
5. I
NPUT 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.
3AC 400V 3AC 480V
Inrush current
Max. 10A
peak
10A
peak
Temperature independent
Typ.
4A
peak
4A
peak
Temperature independent
Inrush energy
Max. 0.5A2s 0.5A2s Temperature independent
Fig. 5-1 Typical input inrush current
behaviour at nominal load and 25°C ambient
20ms/DIV
Input current 1A/DIV
Input voltage 500V/DIV
Output voltage
CT10.241, CT10.241-C1
CT-Series
3-PHASE, 24V, 10A, 240W
May 2018 / Rev. 2.0a DS-CT10.241-EN All values are typical figures specified at 3x 400Vac, 50Hz input voltage, symmetrical
phase voltages, 24V, 10A output load, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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6. DC O
UTPUT
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
Nom.
24V
Adjustment range
Min. 24-28V Guaranteed value
Max. 30V 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.
Factory setting output voltage
Typ. 24.1V ±0.2% in “single use” mode at full load, cold unit
Typ. 24.1V ±0.2% in “parallel use” mode at 10A, cold unit
(results to 23.9V ±0.7% at 12A and 25.0V ±0.2% at no
load)
Line regulation
Max. 10mV Between 3x 323 and 3x 576Vac input voltage change
Load regulation
Max. 100mV Between 0 and 10A in “single use” mode, static value
Typ. 1000mV Between 0 and 10A in “parallel use” mode, static
value, see Fig. 6-2
Ripple and noise voltage
Max. 50mVpp Bandwidth 20Hz to 20MHz, 50Ohm
Output current
Nom.
12A1)
At 24V and an ambient temperature below 45°C
Nom. 10A At 24V and 60°C ambient temperature
Nom. 7.5A At 24V and 70°C ambient temperature
Nom. 10.3A1) At 28V and an ambient temperature below 45°C
Nom. 8.6A At 28V and 60°C ambient temperature
Nom. 6.5A At 28V and 70°C ambient temperature
Reduce output current linearly between +45°C and +70°C
Fuse breaking current
Typ. 23A Up to 20ms once every five seconds, see Fig. 6-1.
The fuse braking current is an enhanced transient
current which helps to trip fuses on faulty output
branches. The output voltage stays above 20V.
Overload behavior
Continuous current See Fig. 6-1
Overload/ short
-circuit current Max. 23A Continuous current, see Fig. 6-1
Output capacitance
Typ. 6 500µF Included inside the power supply
Back
-feeding loads
Max. 35V The unit is resistant and does not show
malfunctioning when a load feeds back voltage to
the power supply. It does not matter whether the
power supply is on or off. The absorbing energy can
be calculated according to the built-in large sized
output capacitor.
1) This current is also available for temperatures up to +70°C with a duty cycle of 10% and/ or not longer than 1 minute every 10 minutes.
CT10.241, CT10.241-C1
CT-Series
3-PHASE, 24V, 10A, 240W
May 2018 / Rev. 2.0a DS-CT10.241-EN All values are typical figures specified at 3x 400Vac, 50Hz input voltage, symmetrical
phase voltages, 24V, 10A output load, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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Fig. 6-1 Output voltage vs. output current,
typ.
Fig. 6-2 Output voltage in “parallel use”
mode, typ.
Output Voltage (Single Use, typ.)
0
0 9
18
4
8
12
28V
16
20
24
30A21123
6 15
24 27
Adjustment
Range
Output Current
Extra
current
for 20ms
Continuous
current
Factory
setting
Output Voltage (Parallel Use, typ.)
22V
0 4 8
23V
24V
25V
29V
26V
27V
28V
12A
1062
Adjustment
Range
Factory
setting
Output Current
7. H
OLD-UP TIME
3AC 400V 3AC 480V
Hold
-up Time Typ. 34ms 54ms At 24V, 10A, see Fig. 7-1
Typ. 68ms 108ms At 24V, 5A, see Fig. 7-1
Min 28ms 44ms At 24V, 10A, see Fig. 7-1
Min. 56ms 87ms At 24V, 5A, see Fig. 7-1
Fig. 7-1 Hold-up time vs. input voltage Fig. 7-2 Shut-down behavior, definitions
0
20
40
60
100ms
320 360
400 440 3x480Vac
Input Voltage
Hold-up Time at 24Vdc
5A, typ.
10A, typ.
10A, min.
5A, min.
80
- 5%
Hold-up Time
Output
Voltage
Input
Voltage
L1 L2 L3
CT10.241, CT10.241-C1
CT-Series
3-PHASE, 24V, 10A, 240W
May 2018 / Rev. 2.0a DS-CT10.241-EN All values are typical figures specified at 3x 400Vac, 50Hz input voltage, symmetrical
phase voltages, 24V, 10A output load, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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8. E
FFICIENCY AND POWER LOSSES
3AC 400V 3AC 480V
Efficiency
Typ. 92.8% 92.9% At 24V, 10A, 3-phase operation
Typ. 92.4% 92.6% At 24V, 10A, when using only two legs of a 3-
phase system, see also chapter 22.7.
Average efficiency *)
Typ. 92.2% 92.0% 25% at 2.5A, 25% at 5A, 25% at 7.5A. 25% at
10A, 3-phase operation
Power losses
Typ. 2.3W 2.6W At 0A, 3-phase operation
Typ. 11.8W 11.8W At 24V, 5A, 3-phase operation
Typ. 18.6W 18.3W At 24V, 10A, 3-phase operation
Typ. 23.5W 22.8W At 24V, 12A, 3-phase operation
*) 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.
Fig. 8-1 Efficiency vs. output current at 24V,
typ., 3-phase operation
Fig. 8-2 Losses vs. output current at 24V,
typ., 3-phase operation
Efficiency
2
90
91
92
89
93%
12A
4
8 10
Output Current
6
3x480Vac
3x400Vac
Power Losses
0 2 4 8 10
12A
0
3
9
12
18
21
24W
Output Current
6
6
15
3x480Vac
3x400Vac
3x480Vac
3x400Vac
Fig. 8-3 Efficiency vs. input voltage at 24V,
10A, typ., 3-phase operation
Fig. 8-4 Losses vs. input voltage at 24V, 10A,
typ., 3-phase operation
Efficiency
350 400
450
500 3x550Vaf
92.0
92.2
92.4
92.6
Input Voltage
92.8
93.0
93.2%
Power Losses
350 400
450
500 3x550Vaf
17.0
17.5
18.0
18.5
Input Voltage
19.0
19.5
20W
CT10.241, CT10.241-C1
CT-Series
3-PHASE, 24V, 10A, 240W
May 2018 / Rev. 2.0a DS-CT10.241-EN All values are typical figures specified at 3x 400Vac, 50Hz input voltage, symmetrical
phase voltages, 24V, 10A output load, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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9. F
UNCTIONAL DIAGRAM
Fig. 9-1 Functional diagram
+
+
-
-
V
OUT
Output
Over-
Voltage
Protection
PFC
Inductor
Inrush
Limiter
Transient
Filter
Input Fuses
Input Filter
Input
Rectifier
Output
Voltage
Regulator
Power
Converter
Output
Filter
Output
Power
Manager
Temper-
ature
Shut-
down
DC-ok
LED
L2
L3
L1
Single /
Parallel
10. F
RONT 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 no
load 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.
CT10.241, CT10.241-C1
CT-Series
3-PHASE, 24V, 10A, 240W
May 2018 / Rev. 2.0a DS-CT10.241-EN All values are typical figures specified at 3x 400Vac, 50Hz input voltage, symmetrical
phase voltages, 24V, 10A output load, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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11. C
ONNECTION TERMINALS
The terminals are IP20 Finger safe constructed and suitable for field- and factory wiring.
Input Output
Type
Screw termination Screw termination
Solid wire
Max. 6mm2 Max. 6mm2
Stranded wire
Max. 4mm2 Max. 4mm2
American Wire Gauge
AWG 20-10 AWG 20-10
Max. wire diameter (including ferrules)
2.8mm 2.8mm
Recommended tightening torque
1Nm, 9lb-in 1Nm, 9lb-in
Wire stripping length
7mm / 0.28inch 7mm / 0.28inch
Screwdriver
3.5mm slotted or Phillips No 1 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 as
shown in Fig. 11-2.
Fig. 11-1 Daisy chaining of outputs Fig. 11-2 Using distribution terminals
Load
+
-
Power
Supply
+
+
- -
Output
Power
Supply
+ +
- -
Output
max 25A!
continuous
Distribution
Terminals
Load
+
-
Power
Supply
+
+
- -
Output
Power
Supply
+ +
- -
Output
CT10.241, CT10.241-C1
CT-Series
3-PHASE, 24V, 10A, 240W
May 2018 / Rev. 2.0a DS-CT10.241-EN All values are typical figures specified at 3x 400Vac, 50Hz input voltage, symmetrical
phase voltages, 24V, 10A output load, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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12. L
IFETIME EXPECTANCY
The 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 and
is 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.
3AC 400V 3AC 480V
Lifetime expectancy
54 000h 62 000h At 24V, 10A and 40°C, 3-phase operation
133 000h
134 000h
At 24V, 5A and 40°C, 3-phase operation
41 000h 47 000h At 24V, 12A and 40°C, 3-phase operation
151 000h 176 000h At 24V, 10A and 25°C, 3-phase operation
376 000h 379 000h At 24V, 5A and 25°C, 3-phase operation
116 000h 133 000h At 24V, 12A and 25°C, 3-phase operation
Lifetime expectancy
48 000h 58 000h At 24V, 10A and 40°C, 2-phase operation
134 000h 145 000h At 24V, 5A and 40°C, 2-phase operation
36 000h 42 000h At 24V, 12A and 40°C, 2-phase operation
135 000h 164 000h At 24V, 10A and 25°C, 2-phase operation
379 000h 410 000h At 24V, 5A and 25°C, 2-phase operation
102 000h 119 000h 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 indicates
reliability 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.
3AC 400V
3AC 480V
MTBF SN 29500, IEC 61709
975 000h 985 000h At 24V, 10A and 40°C, 3-phase operation
1 706 000h 1 723 000h At 24V, 10A and 25°C, 3-phase operation
925 000h 939 000h At 24V, 10A and 40°C, 2-phase operation
1 633 000h 1 656 000h At 24V, 10A and 25°C, 2-phase operation
MTBF MIL HDBK 217F
444 000h 428 000h At 24V, 10A and 40°C, 3-phase Ground Benign GB40
584 000h 563 000h At 24V, 10A and 25°C, 3-phase Ground Benign GB25
100 000h 100 000h At 24V, 10A and 40°C, 3-phase Ground Fixed GF40
132 000h 132 000h At 24V, 10A and 25°C, 3-phase Ground Fixed GF25
436 000h 423 000h At 24V, 10A and 40°C, 2-phase Ground Benign GB40
555 000h 572 000h At 24V, 10A and 25°C, 2-phase Ground Benign GB25
98 000h 98 000h At 24V, 10A and 40°C, 2-phase Ground Fixed GF40
129 000h 129 000h At 24V, 10A and 25°C, 2-phase Ground Fixed GF25
CT10.241, CT10.241-C1
CT-Series
3-PHASE, 24V, 10A, 240W
May 2018 / Rev. 2.0a DS-CT10.241-EN All values are typical figures specified at 3x 400Vac, 50Hz input voltage, symmetrical
phase voltages, 24V, 10A output load, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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13/28
14. EMC
The 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), the
device 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 Contact discharge
Air discharge
8kV
15kV
Criterion A
Criterion A
Electromagnetic RF field
EN 61000-4-3
80MHz-2.7GHz
10V/m
Criterion A
Fast transients (Burst)
EN 61000-4-4 Input lines
Output lines
4kV
2kV
Criterion A
Criterion A
Surge voltage on input
EN 61000-4-5
L1 L2, L2 L3, L1 L3
L1 / L2 / L3 PE
2kV
4kV
Criterion A
Criterion A
Surge voltage on output
EN 61000-4-5 + -
+ / - PE
500V
1kV
Criterion A
Criterion A
Conducted disturbance
EN 61000-4-6
0.15-80MHz
10V
Criterion A
Mains voltage dips
(Dips on three phases)
EN 61000-4-11
0% of 380Vac
0% of 480Vac
0Vac, 20ms
0Vac, 20ms
Criterion A
Criterion A
Mains voltage dips
(Dips on two phases)
EN 61000-4-11 40% of 380Vac
40% of 480Vac
70% of 380Vac
70% of 480Vac
200ms
200ms
500ms
500ms
Criterion A
Criterion A
Criterion A
Criterion A
Voltage interruptions
EN 61000-4-11 5s Criterion C
Powerful transients
VDE 0160 Over entire load range 1550V, 1.3ms 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 emis
sion
input lines
EN 55011, EN 55022, FCC Part 15, CISPR 11, CISPR 22 Class B
Radiated emission
EN 55011, EN 55022 Class B
Harmonic input current
EN 61000-3-2 Fulfilled for Class A equipment
Voltage fluctuations, flicker
EN 61000-3-3 Fulfilled, tested with constant
current 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) this
device must accept any interference received, includin
g interference that may cause undesired operation.
Switching Frequency
Main converter
60kHz to 140kHz Output load and input voltage dependent
CT10.241, CT10.241-C1
CT-Series
3-PHASE, 24V, 10A, 240W
May 2018 / Rev. 2.0a DS-CT10.241-EN All values are typical figures specified at 3x 400Vac, 50Hz input voltage, symmetrical
phase voltages, 24V, 10A output load, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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14/28
15. E
NVIRONMENT
Operational temperature
-25°C to +70°C (-13°F to 158°F) The operational temperature is the ambient or
surrounding temperature and is defined as the
air temperature 2cm below the device.
Storage temperature
-40°C to +85°C (-40°F to 185°F) For storage and transportation
Output de
-rating 3.2W/°C
6W/°C
15W/1000m or 5°C/1000m
9W/-5kPa or 3°C/-5kPa
Between +45°C and +60°C (113°F to 140°F)
Between +60°C and +70°C (140°F to 158°F)
For altitudes >2000m (6560ft), see Fig. 15-2
For atmospheric pressures <80kPa, see Fig. 15-2
The de-rating is not hardware controlled. The customer has to take care by himself to
stay below the de-rated current limits in order not to overload the unit.
Humidity
5 to 95% r.h. According to IEC 60068-2-30
Atmospheric pressure
110-47kPa See Fig. 15-2 for details
Altitude
Up to 6000m (20 000ft)
See Fig. 15-2 for details
Over
-voltage category III According to IEC 60664-1 for altitudes up to
2000m
II According to IEC 60664-1 for altitudes from
2000 to 6000m and atmospheric pressures
from 80 to 47kPa
Degree of pollution
2 According to IEC 62477-1, not conductive
Vibration sinusoidal
2-17.8Hz: ±1.6mm; 17.8-500Hz: 2g
2 hours / axis
According to IEC 60068-2-6
Sh
ock 30g 6ms, 20g 11ms
3 bumps / direction, 18 bumps in total
According to IEC 60068-2-27
Shock and vibration is tested in combination with DIN-Rails according to EN 60715 with a
height of 15mm and a thickness of 1.3mm and standard orientation.
LABS comp
atibility As a rule, only non-silicon precipitating materials are used. The unit conforms to the
LABS criteria and is suitable for use in paint shops.
Corrosive gases
Tested according to ISA-71.04-1985, Severity Level G3 for a service life of minimum
10years in these environments.
Audible noise
Some audible noise may be emitted from the power supply during no load, overload or
short circuit.
Fig. 15-1 Output current vs. ambient temp. Fig. 15-2 Output current vs. altitude at 24V
0
-25 0
20 40
70°C
2A
4A
6A
8A
10A
12A
60
Ambient Temperature
A... Continuous
B... Short term
A
B
Allowed Output Current at 24V
2000m 4000m 6000m
2A
4A
6A
8A
10A
12A
Altitude
Allowed Output Current at 24V
AP
*)
80kPa 62kPa 47kPa110kPa
0m
*) Atmospheric pressure
A... Ambient < 60°C
B... Ambient < 45°C
C... Short term
A
B
C
CT10.241, CT10.241-C1
CT-Series
3-PHASE, 24V, 10A, 240W
May 2018 / Rev. 2.0a DS-CT10.241-EN All values are typical figures specified at 3x 400Vac, 50Hz input voltage, symmetrical
phase voltages, 24V, 10A output load, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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15/28
16. S
AFETY AND PROTECTION FEATURES
Isolation resistance
Min. 500MOhm At delivered condition between input and output,
measured with 500Vdc
Min. 500MOhm At delivered condition between input and PE,
measured with 500Vdc
Min. 500MOhm At delivered condition between output and PE,
measured with 500Vdc
Min. 500MOhm At delivered condition between output and DC-OK
contacts, measured with 500Vdc
PE resistance
Max. 0.1Ohm Resistance between PE terminal and the housing in
the area of the DIN-rail mounting bracket.
Output over-voltage protection
Typ.
30.5Vdc
Max. 32Vdc
In case of an internal defect, a redundant circuit limits the maximum
output voltage. The output shuts down and automatically attempts to
restart.
Class of protection
I According to IEC 61140
A PE (Protective Earth) connection is required
Degree of protection
IP 20 According to EN/IEC 60529
Over
-temperature protection Included Output shuts down with automatic restart.
Temperature sensors are installed on critical
components inside the unit and turn the unit off in
safety critical situations, which can happen e.g.
when ambient temperature is too high, ventilation
is obstructed or the de-rating requirements are not
followed. There is no correlation between the
operating temperature and turn-off temperature
since this is dependent on input voltage, load and
installation methods.
Input transient protection
MOV (Metal
Oxide Varistor)
For protection values see chapter 14 (EMC).
Internal input fuse
Included Not user replaceable slow-blow high-braking
capacity fuse
Touch current
(leakage current) Typ. 0.17mA At 3x 400Vac, 50Hz, TN-,TT-mains
Typ. 0.24mA At 3x 480Vac, 60Hz, TN-,TT-mains
Max. 0.22mA At 3x 440Vac, 60Hz, TN-,TT-mains
Max. 0.31mA At 3x 528Vac, 50Hz, TN-,TT-mains
CT10.241, CT10.241-C1
CT-Series
3-PHASE, 24V, 10A, 240W
May 2018 / Rev. 2.0a DS-CT10.241-EN All values are typical figures specified at 3x 400Vac, 50Hz input voltage, symmetrical
phase voltages, 24V, 10A output load, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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17. D
IELECTRIC 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 the
appropriate 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
A B C
A
C
B
L1
Input
Earth
Output
-
+
L3
L2
Type test 60s 2500Vac 3000Vac 500Vac
Routine test 5s 2500Vac 2500Vac 500Vac
Field test 5s 2000Vac 2000Vac 500Vac
Cut-off current setting
for field test
> 10mA > 10mA > 30mA
It is recommend that either the + pole, the – pole or any other part
of the output circuit shall be connected to the earth/ground
system. This helps to avoid situations in which a load starts
unexpectedly or can not be switched off when unnoticed earth
faults occur.
CT10.241, CT10.241-C1
CT-Series
3-PHASE, 24V, 10A, 240W
May 2018 / Rev. 2.0a DS-CT10.241-EN All values are typical figures specified at 3x 400Vac, 50Hz input voltage, symmetrical
phase voltages, 24V, 10A output load, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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18. A
PPROVALS
EC Declaration of Conformity
The CE mark indicates conformance with the
- RoHS directive
- EMC directive and the
- Low-voltage directive (LVD)
IEC 60950
-1
2
nd
Edition
CB Scheme,
Information Technology Equipment
UL 508
IND. CONT. EQ.
Listed for use as Industrial Control Equipment;
U.S.A. (UL 508) and Canada (C22.2 No. 107-1-01);
E-File: E198865
UL 60950
-1
2
nd
Edition
Recognized for use as Information Technology Equipment,
Level 5; U.S.A. (UL 60950-1) and Canada (C22.2 No. 60950-1);
E-File: E137006
Applicable for altitudes up to 2000m.
Marine
GL (Germanischer Lloyd) classified and
ABS (American Bureau for Shipping) PDA
Environmental category: C, EMC2
Marine and offshore applications
SEMI F47
SEMI F47-0706
Ride-through compliance for the semiconductor industry.
Full SEMI range compliance (Dips on two phases: 304Vac for
1000ms, 266Vac for 500ms and 190Vac for 200ms)
EAC TR Registration
Registration for the Eurasian Customs Union market
(Russia, Kazakhstan, Belarus)
19. O
THER FULFILLED STANDARDS
RoHS Directive
Directive 2011/65/EU of the European Parliament and the
Council of June 8th, 2011 on the restriction of the use of
certain hazardous substances in electrical and electronic
equipment.
REACH Directive
Directive 1907/2006/EU of the European Parliament and the
Council of June 1st, 2007 regarding the Registration,
Evaluation, Authorisation and Restriction of Chemicals
(REACH)
IEC/EN 61558
-2-16
(Annex BB)
Safety Isolating
Transformer
Safety Isolating Transformers corresponding to Part 2-6 of the
IEC/EN 61558
CT10.241, CT10.241-C1
CT-Series
3-PHASE, 24V, 10A, 240W
May 2018 / Rev. 2.0a DS-CT10.241-EN All values are typical figures specified at 3x 400Vac, 50Hz input voltage, symmetrical
phase voltages, 24V, 10A output load, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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18/28
20. P
HYSICAL DIMENSIONS AND WEIGHT
Width
62mm 2.44’’
Height
124mm 4.88’’
Depth
117mm 4.61’’
The DIN-rail height must be added to the unit depth to calculate the total required
installation depth.
Weight
750g / 1.65lb
DIN-Rail
Use 35mm DIN-rails according to EN 60715 or EN 50022 with a height of 7.5 or 15mm.
Housing material
Body: Aluminium alloy
Cover: zinc-plated steel
Installation
clearances See chapter 2
Penetration protection
Small parts like screws, nuts, etc. with a diameter larger than 3.5mm
Fig. 20-1 Front view Fig. 20-2 Side view
All dimensions in mm
All dimensions in mm
CT10.241, CT10.241-C1
CT-Series
3-PHASE, 24V, 10A, 240W
May 2018 / Rev. 2.0a DS-CT10.241-EN All values are typical figures specified at 3x 400Vac, 50Hz input voltage, symmetrical
phase voltages, 24V, 10A output load, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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19/28
21. A
CCESSORIES
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 can
be 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 pattern Fig. 21-3 Side view
All dimensions in mm
All dimensions in mm
Fig. 21-4 Isometric view Fig. 21-5 Isometric view Fig. 21-6 Isometric view
CT10.241, CT10.241-C1
CT-Series
3-PHASE, 24V, 10A, 240W
May 2018 / Rev. 2.0a DS-CT10.241-EN All values are typical figures specified at 3x 400Vac, 50Hz input voltage, symmetrical
phase voltages, 24V, 10A output load, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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21.2. ZM13.SIDE - SIDE MOUNT BRACKET
This 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. 21-8
Mounting instructions
Fig. 21-9
Side mounting
without DIN-rail brackets
Fig. 21-10
Side mounting
with DIN-rail brackets
Fig. 21-11
Hole pattern
All dimensions in mm
CT10.241, CT10.241-C1
CT-Series
3-PHASE, 24V, 10A, 240W
May 2018 / Rev. 2.0a DS-CT10.241-EN All values are typical figures specified at 3x 400Vac, 50Hz input voltage, symmetrical
phase voltages, 24V, 10A output load, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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21.3. YRM2.DIODE - REDUNDANCY MODULES
The 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 case
of 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.
CT10.241, CT10.241-C1
CT-Series
3-PHASE, 24V, 10A, 240W
May 2018 / Rev. 2.0a DS-CT10.241-EN All values are typical figures specified at 3x 400Vac, 50Hz input voltage, symmetrical
phase voltages, 24V, 10A output load, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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22. A
PPLICATION 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 when
starting a capacitive load.
The peak current capability also ensures the safe operation of subsequent circuit breakers of load circuits. The load
branches 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)
Fig. 22-2 50A peak current for 5ms, typ.
(5x the nominal current)
Peak current voltage dips
Typ. from 24V to 6V At 20A for 50ms, resistive load
Typ. from 24V to 12V At 50A for 2ms, resistive load
Typ. from 24V to 3V At 50A for 5ms, resistive load
CT10.241, CT10.241-C1
CT-Series
3-PHASE, 24V, 10A, 240W
May 2018 / Rev. 2.0a DS-CT10.241-EN All values are typical figures specified at 3x 400Vac, 50Hz input voltage, symmetrical
phase voltages, 24V, 10A output load, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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22.2. OUTPUT CIRCUIT BREAKERS
Standard miniature circuit breakers (MCB’s or UL 1077 circuit breakers) are commonly used for AC-supply systems and
may 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, a
fast (magnetic) tripping of the MCB is desired. A quick shutdown within 10ms is necessary corresponding roughly to
the 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 cross
section 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
Test results for maximum wire length:
MCB
Power
Supply
AC
DC
+
-
+
-
Load
Wire length
S1...... Fault Simulation Switch
S1
0.75mm² 1.0mm² 1.5mm² 2.5mm²
C
-2A 23m 28m 43m 69m
C
-3A 18m 23m 34m 54m
C
-4A 6m 12m 18m 28m
C
-6A 3m 4m 6m 7m
C
-8A 2m 3m 4m 5m
C
-10A
1m 2m 3m 4m
B-6A
9m
14m
19m
33m
B
-10A
4m 5m 6m 9m
B
-13A 3m 4m 5m 8m
22.3. CHARGING OF BATTERIES
The power supply can be used to charge lead-acid or maintenance free batteries. Two 12V SLA or VRLA batteries are
needed 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-of-
charge 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.
CT10.241, CT10.241-C1
CT-Series
3-PHASE, 24V, 10A, 240W
May 2018 / Rev. 2.0a DS-CT10.241-EN All values are typical figures specified at 3x 400Vac, 50Hz input voltage, symmetrical
phase voltages, 24V, 10A output load, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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22.4. SERIES OPERATION
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.
22.5. PARALLEL USE TO INCREASE OUTPUT POWER
Devices can be paralleled to increase the output power. 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.
The ambient temperature is not allowed to exceed +60°C.
If more than three units are connected in parallel, a fuse or circuit breaker
with 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 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).
Pay attention that leakage current, EMI, inrush current, harmonics will increase when using multiple devices.
Unit B
-
+
Load
+
-
AC
DC
AC
DC
-
+
Unit A
Unit B
-
+
Load
+
-
AC
DC
AC
DC
-
+
Unit A
CT10.241, CT10.241-C1
CT-Series
3-PHASE, 24V, 10A, 240W
May 2018 / Rev. 2.0a DS-CT10.241-EN All values are typical figures specified at 3x 400Vac, 50Hz input voltage, symmetrical
phase voltages, 24V, 10A output load, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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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 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.
For 1+1 redundancy the ambient temperature is not allowed to exceed +60°C.
Wiring examples for 1+1 and n+1 redundancy:
Fig. 22-4 1+1 Redundant configuration for
10A load current and redundancy modules
Fig. 22-5 N+1 Redundant configuration for 30A load current with multiple power
supplies and redundancy modules
Failure
Monitor
Power
Supply
+ +
- -
L1L2 PE
Output
Input
L3
I I
L1
L2
I I
PE
optional
Power
Supply
+ +
- -
L1L2 PE
Output
Input
L3
I
L3
I
YRM2.DIODE
Redundancy
Module
Output
Input
1
Input
2
+-+
-
+
-
o o o
o
2
1
Input ok
YRM2.DIODE
Redundancy
Module
Output
Input
1
Input
2
+-+
-
+
-
o o o o
2
1
Input ok
Load
Failure
Monitor
Power
Supply
+ +
- -
L1L2 PE
Output
Input
L3
I
L1
L2
I
I
PE
optional
Power
Supply
+ +
- -
L1L2 PE
Output
Input
L3
I
L3
I
YRM2.DIODE
Redundancy
Module
Output
Input
1
Input
2
+
-
+
-
+
-
o
o o
o
2
1
Input ok
YRM2.DIODE
Redundancy
Module
Output
Input
1
Input
2
+
-
+
-
+
-
o
o o o
2
1
Input ok
Load
I
I
optional
Power
Supply
+ +
- -
L1L2 PE
Output
Input
L3
I
YRM2.DIODE
Redundancy
Module
Output
Input
1
Input
2
+
-
+
-
+
-
o o o o
2
1
Input ok
I
I
optional
Power
Supply
+ +
- -
L1L2 PE
Output
Input
L3
I
YRM2.DIODE
Redundancy
Module
Output
Input
1
Input
2
+
-
+
-
+
-
o
o
o o
2
1
Input ok
I
CT10.241, CT10.241-C1
CT-Series
3-PHASE, 24V, 10A, 240W
May 2018 / Rev. 2.0a DS-CT10.241-EN All values are typical figures specified at 3x 400Vac, 50Hz input voltage, symmetrical
phase voltages, 24V, 10A output load, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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26/28
22.7. OPERATION ON TWO PHASES
No external protection device is required to protect against a phase-loss
failure.
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.
Pay attention that EMC performance, hold-up time and losses differ from a three phase operation. Therefore, check
suitability of your individual application.
Using only two legs of a 3-phase system is not included in the agency approval. Therefore, additional investigations
might be necessary during the approval process of the final system.
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 two
legs of a 3-phase system
Allowed Output Current at 24V
0
-25 0
20
70°C
2
4
6
8
10
12A
40 60
Ambient Temperature
A
B
A... 2x 340-576Vac
B... 2x 320-340Vac
0
20
40
60
100ms
320 360 400 440 2x480Vac
Input Voltage
Hold-up Time at 24Vdc
5A, typ.
10A, typ.
10A, min.
5A, min.
80
Fig. 22-8 Efficiency vs. output current at 24V
for 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
2
89
91
93
88
94%
12A
4 8 10
Output Current
6
90
92
2x400Vac
2x480Vac
Power Losses
0 2 4
8 10 12A
0
4
12
20
24W
8
6
16
Output Current
2x480Vac
2x400Vac
DC
L1
L2
L3
open
AC
L1
L2
L3
PE
Power Supply
CT10.241, CT10.241-C1
CT-Series
3-PHASE, 24V, 10A, 240W
May 2018 / Rev. 2.0a DS-CT10.241-EN All values are typical figures specified at 3x 400Vac, 50Hz input voltage, symmetrical
phase 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
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 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
180x180x165mm
Rittal Typ IP66 Box
PK 9519 100,
plastic
180x180x165mm
Rittal Typ IP66 Box
PK 9519 100,
plastic
Input voltage
3x 400Vac 3x 400Vac
Load
24V, 8A; (=80%) 24V, 10A; (=100%)
Temperature inside the box
48.4°C 54.7°C
Temperature outside the box
24.5°C 24.9°C
Temperature rise
23.9K 29.8K
CT10.241, CT10.241-C1
CT-Series
3-PHASE, 24V, 10A, 240W
May 2018 / Rev. 2.0a DS-CT10.241-EN All values are typical figures specified at 3x 400Vac, 50Hz input voltage, symmetrical
phase voltages, 24V, 10A output load, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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28/28
22.9. MOUNTING ORIENTATIONS
Mounting orientations other than input terminals on the bottom and output on the top require a reduction in
continuous 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 (6560ft).
Fig. 22-10
Mounting
Orientation A
(Standard
orientation)
Power
Supply
OUTPUT
INPUT
Allowed Output Current at 24V
0
+45 +70°C
7.5A
10A
12A
Ambient Temperature
+60
Fig. 22-11
Mounting
Orientation B
(Upside down)
Power
Supply
OUTPUT
INPUT
Allowed Output Current at 24V
0
+30 +70°C
7.5A
12A
Ambient Temperature
+60
Fig. 22-12
Mounting
Orientation C
(Table-top
mounting)
Allowed Output Current at 24V
0
+25 +70°C
6.5A
12A
Ambient Temperature
+60
Fig. 22-13
Mounting
Orientation D
(Horizontal cw)
Power
Supply
OUTPUT
INPUT
Allowed Output Current at 24V
0
+25 +70°C
6.5A
12A
Ambient Temperature
+60
Fig. 22-14
Mounting
Orientation E
(Horizontal ccw)
Power
Supply
OUTPUT
INPUT
Allowed Output Current at 24V
0
+25 +70°C
6.5A
12A
Ambient Temperature
+60
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