Schaffner FN5420 Operating manual

Schaffner Group |Nordstrasse 11e |4542 Luterbach |Switzerland
T [phone] |in[email protected]om | www.schaffner.com
User and installation manual
Output filter FN5420 and RWK5420
www.schaffner.com
English version (original instructions)

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Copyright ©2021 Schaffner International Ltd. All Rights Reserved. All rights of this User and Installa-
tion Manual (“Manual”) including but not limited to the contents, information, and figures are solely
owned and reserved by Schaffner International Ltd. (“Schaffner”). The Manual can only be applied to
the operation or the use of Schaffner output filters. Any disposition, duplication, dissemination, repro-
duction, modification, translation, extraction, or usage of this Manual in whole or in part is prohibited
without the prior written permission of Schaffner. Given that Schaffner will continuously improve and
develop the product, changes may be made to the information in this Manual at any time without obli-
gation to notify any person of such revision or changes. Schaffner will make all possible efforts to se-
cure the accuracy and the integrity of this Manual. Schaffner disclaims any kinds or forms of warranty,
guarantee, or undertaking, either expressly or implicitly, including but not limited to the completeness,
faultlessness, accuracy, non-infringement, merchantability or fitness for a particular purpose of the
Manual.

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Revision: 01 (October 2021)
The most current edition of this document (PDF format) and official translations can be obtained from
your contact of the Schaffner organization or online at schaffner.com
Other technical documentation of our products is also available in the download area of our website
schaffner.com/downloads
Document name:
User and Installation Manual output filter FN5420 and RWK5420 Rev01.pdf
Valid for:
sine wave filter FN5420 (all versions)
dv/dt filter RWK5420 (all versions)
Version history
Revision
Date
Description
01
October 2021
Initial version

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i. Schaffner output filter
FN5420 and RWK5420 product highlights
Whenever electricity is used to drive an equipment, in particular when a motor drive is controlling the
speed of an electric motor special attention for the noises generated by the motor drives need to be
taken into considerations. Schaffner sine wave filters help to avoid problems that can result in purely
functional difficulties to very severe motor damage.
Sine wave filters FN5420 series offer state of the art motor protection for the most demanding applica-
tions. By installing a sine wave filter between your drive and motor:
|The filter converts the rectangular PWM output voltage of the drive into a smooth sinusoidal
wave form signal with low residual ripple and without any voltage peaks between phases.
|The filter eliminates premature damage of the motor caused by high dv/vt, overvoltages,
cable ringing and motor overheating. It improves bearing lifetime by reducing the currents cir-
culating through it*.
|It allows extended motor cable length to be used between drive and motor.
Dv/dt reactor RWK5420 series offer economical motor protection for various applications. By installing
a dv/dt reactor between your drive and motor:
|The reactor reduces the steep dv/dt generated by the IGBT in the inverter to a level making it
possible to fulfill standard as IEC 60034-17/25.
|The filter reduces premature damage of the motor caused by high dv/vt, overvoltages, ca-
ble ringing, motor overheating and eddy current losses.
This user manual is intended to support designers, installers, and application engineers with filter se-
lection, installation, application, and maintenance. It provides helpful solutions to overcome motor pro-
tection challenges and answers frequently asked questions.
If you require additional support, please feel free to contact Schaffner or our local partner.
*In case of problem with bearing current, sine wave filter plus addons type FN5030 would eliminate the flashover created at
switching, increasing even more the bearing total lifetime.

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Performance Guarantee
The remaining voltage and current ripple at motor terminals is reduced to values <5% according to EN
61000-2-2.
ii. Minimum system Requirements
The highest performance levels of the selected filter will be achieved when the following system condi-
tions are met:
|Motor frequency: up to 60Hz without derating and up to 200Hz with derating (see section
2.4.2)
|Maximum surrounding air temperature: 70°C for filter sizes 26 to 1'100A and 100°C for filter
sizes 2.3 to 18A, always with derating above 45°C.
|Nominal voltage: ±10%
|Voltage unbalance (at filter input): <3%
|Maximum DC link voltage: 750VDC
iii. Important user notice
Schaffner sine wave filters are designed for the operation on the output (motor) side of converters,
such as AC or DC motor drives. Filter suitability for a given application must be determined by the user
on a case by case basis. Schaffner will not assume liability for any consequential downtimes or dam-
ages resulting from use or application of Schaffner sine wave filters beyond their specifications.
Schaffner sine wave filters are not designed for single-phase or split-phase applications.

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i. General Safety Notes and Installation Guidelines (Cautions
and Warnings)

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Content
1Sine wave filter FN5420 designation..................................................................8
1.1 Sine wave filter designation ...................................................................................................... 8
1.1.1 Example of sine wave filter designations .............................................................................. 8
1.2 Dv/dt reactor designation .......................................................................................................... 9
1.2.1Example of sine wave filter designations .............................................................................. 9
1.3 Additional Resources................................................................................................................. 9
1.4 Naming convention .................................................................................................................... 9
2Filter selection ...................................................................................................10
2.1 Filter selection table FN5420 IP00........................................................................................... 13
2.2 Filter selection table FN5420 IP20........................................................................................... 14
2.3 Filter selection table RWK5420 ............................................................................................... 15
2.4 Derating ..................................................................................................................................... 16
2.4.1 Temperature derating.......................................................................................................... 16
2.4.2 Motor frequency derating..................................................................................................... 17
2.4.3 Calculation example of derating.......................................................................................... 17
3Filter description................................................................................................18
3.1 General electrical specifications FN5420............................................................................... 18
3.2 General electrical specifications RWK5420........................................................................... 19
3.3 Power losses............................................................................................................................. 20
3.3.1 Power loss calculation example .......................................................................................... 20
3.4 Additional electrical specifications ........................................................................................ 21
3.5 Screw size, torque and cable cross-section requirement.................................................... 22
3.5.1 Power terminals................................................................................................................... 22
3.5.2 Auxiliary signal and earth terminals..................................................................................... 24
3.6 Thermal protection switch specifications.............................................................................. 25
3.7 Cooling requirement................................................................................................................. 25
3.8 Mechanical data........................................................................................................................ 26

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3.8.1 Dimensions FN5420 IP00.................................................................................................... 26
3.8.2 Dimensions FN5420 IP20.................................................................................................... 31
3.8.3 Dimensions RWK5420 ........................................................................................................ 32
3.9 Functional diagram................................................................................................................... 37
4Filter appearance and elements.......................................................................38
5Filter installation................................................................................................43
5.1 Step 1: Visual inspection......................................................................................................... 43
5.2 Step 2: Mounting....................................................................................................................... 43
5.2.1 Prepare the fixation ............................................................................................................. 46
5.2.2 Screw selection ................................................................................................................... 46
5.2.3 Filter placement................................................................................................................... 46
5.3 Step 3: Wiring............................................................................................................................ 48
5.3.1 Verify safe disconnection of all line side power................................................................... 48
5.3.2 Carefully connect protective earth (PE) wire to adequate earth potential close to the device
48
5.3.3 Connect PE wire on the device ........................................................................................... 48
5.3.4 Connect shielding for shielded cables................................................................................. 48
5.3.5 Connect shielding for shielded cables................................................................................. 49
5.3.6 Connect the device on drive side ........................................................................................ 49
5.3.7 Connect output filter motor side .......................................................................................... 49
5.3.8 Connect monitor switch TS- TS’.......................................................................................... 49
6Filter maintenance.............................................................................................50
6.1 Maintenance schedule ............................................................................................................. 50
6.2 Fan.............................................................................................................................................. 50
6.3 Power capacitors...................................................................................................................... 51
6.4 Electrical connections.............................................................................................................. 51
7Troubleshooting ................................................................................................52

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1 Sine wave filter FN5420 designation
1.1 Sine wave filter designation
The filter designation is structured from the output filters characteristics.
Figure 1 Schaffner sine wave filter designation
|The first part of the designation ‘FN5420-xxx-yy-E_ _ _ _’ refer to the sine wave filter from
Schaffner output filter products.
|The second part of the designation ‘FN5420-xxx-yy-E_ _ _ _’ indicates the current rating at
rated voltage and 50Hz (note that it can be rounded to 2 significant digits, please check the
exact value in datasheet and section 3.1 below)
|The third part of the designation ‘FN5420-xxx-yy-E_ _ _ _’ indicates the filter terminal type.
For more details, please consult the datasheet and section 3.1 below.
|The fourth part of the designation ‘FN5420-xxx-yy-E__ _ _’ contains 4 slots, the first is the IP
degree of protection, second, the presence of active ventilation (fan), third the presence of a
power supply for the fan (if present) and the last one indicates the presence or not of a tem-
perature switch.
Note that only specific combinations exist, please refer to the selection tables for complete list.
1.1.1 Example of sine wave filter designations
FN5420-90-99-E0XXT: Output filter type sine wave filter for 50/60Hz, rated 90A at nominal voltage and
50Hz, with terminal type 99 (bus bar), rated IP00, without fan nor power supply and with temperature
switch.
FN5420-13-44-E2FXT: Output filter type sine wave filter for 50/60Hz, rated 13.2A at nominal voltage
and 50Hz (note that the last digit precision on rated current is not visible directly in the designation),
with terminal type 44, rated IP20 (enclosure), with fan and no power supply and with temperature
switch.

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1.2 Dv/dt reactor designation
The filter designation is structured from the output filters characteristics.
Figure 2 Schaffner output filter reactor designation
|The first part of the designation ‘RWK5420-xxx-yy-E_ _ _ _’ refer to the dv/dt reactors 6% from
Schaffner output filter products.
|The second part of the designation ‘RWK5420-xxx-yy-E_ _ _ _’ indicates the current rating at
rated voltage and 50Hz (note that it can be rounded to 2 significant digits, please check the
exact value in datasheet and section 3.2 below).
|The third part of the designation ‘RWK5420-xxx-yy-E_ _ _ _’ indicates the filter terminal type.
For more details, please consult the datasheet and section 3.2 below.
|The fourth part of the designation ‘RWK5420-xxx-yy-E__ _ _’ contains 4 slots, the first is the
IP degree of protection, second, the presence of active ventilation (fan), third the presence of
a power supply for the fan (if present) and the last one indicates the presence or not of a tem-
perature switch.
Note that only specific combinations exist, please refer to the selection tables for complete list.
1.2.1 Example of sine wave filter designations
RWK5420-90-99-E0XXT: Output filter type dv/dt reactor for 50/60Hz, rated 90A at nominal voltage and
50Hz, with terminal type 99 (bus bar), rated IP00, without fan nor power supply and with temperature
switch.
1.3 Additional Resources
The Schaffner group does provide a number of additional resources available at schaffner.com to un-
derstand power quality in general and product in particular.
1.4 Naming convention
PWM Pulse width modulation
fPWM Frequency of the PWM (drive frequency)

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2 Filter selection
Schaffner output filters need to be selected according to the applications specifications and needs.
Step 1: motor frequency
Sine wave filter FN5420 series and dv/dt reactor RKW5420 series work at rated current up to a motor
frequency of 60Hz and with a derating up to 200Hz, see derating in section 2.4.2.
Table 1 motor frequency
Filter series
Network frequency
Maximum motor fre-
quency at rated cur-
rent
Maximum motor fre-
quency with a derating
FN5420
50/60Hz
60Hz
200Hz
RWK5420
50/60Hz
60Hz
200Hz
Step 2: motor cable characteristics
The motor cable length between sine wave filter and the motor, is an important metric for the proper
working of the drive, sine wave filter and motor. The maximum cable length is either limited by the
drive or the filter. Schaffner sine wave filter FN5420 series bring very few limitations in this regard with
a maximum cable length of at least 1000m for all filter size and up to 2000m for larger filters at the
minimum fPWM. It is often the case that the drive is more restrictive on the cable length, furthermore
the total voltage-drop of the filter plus cable is to be considered, please consult the drive user manual
for more information.
The type of cable, whenever it is shielded or unshielded has also an influence on the performance. Us-
ing an unshielded cable without addition differential mode filter cause common mode inteferances on
the line. Results and behavior might vary for each specific application. Schaffner recommend using
shielded cable between the sine wave filter and the motor or unshielded cable with an additional com-
mon mode filter, i.e. Schaffner sine wave filter plus FN5030 series (not part of this user manual). For
more information, please consult the Schaffner output filter product page at schaffner.com or contact
your Schaffner representative.
Table 2 motor cable at minimum fPWM
Filter series
Maximum unshielded cable
length*
Maximum shielded cable
length
FN5420 up to 250A
1000m
1000m
FN5420 from 300A to 630A
1500m
1500m
FN5420 from 710A to 1000A
2000m
2000m
RWK5420
100m**
100m**
* Usage of shielded cable is still recommended. Drive and system compatibility to be checked.
** See limitation according to drive switching frequency in step 3
For sine wave filter FN5420, the above limits are given at the minimum allowed fPWM. For other fre-
quencies see example in the Figure 3 below. For fPWM limitation see step 3 below.

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Figure 3 FN5420 maximum cable length by fitler size and fPWM
Step 3: drive switching frequency
The usage of sine wave filter imposes some limit on the switching frequency of the drive (fPWM). The
minimum fPWM is dependant on the filter size and the maximum fPWM is the same for the whole se-
ries, see Table 3 below.
Dv/dt reactor RWK5420 series doesn’t have any minimum fPWM but is still limited to the same maxi-
mum fPWM than sine wave filter FN5420 series. The maximum switching frequency must be reduced
according to the cable length or the cable length must be limited for a given switching frequency.
These limits are giving in the Table 3 and Figure 4 below and in the datasheet.
Table 3 minimum and maximum switching frequency
Filter series
Minimum switching frequency
(fPWM)
Maximum switching frequency
(fPWM)
FN5420 up to 110A
4kHz
16kHz
FN5420 from 145A
2kHz
16kHz
RWK5420 up to 110A
None
4kHz with 100m cable
16kHz with 20m cable
Other values see Figure 4
RWK5420 from 145A
None
16kHz
0
200
400
600
800
1000
1200
1400
1600
1800
2000
2.3 3.1 5.9
10.2 13.2
18 26 32 38 45 60 75 90
110 145 180 200 250 302 400 477 630 710 800
1000
Maximum cable length [m]
Filter size by rated current [A]
Motor cable length @min. fPWM Motor cable length @2x min. fPWM

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Figure 4 RWK5420 limitation in switching frequency and cable length
Step 4: motor protection and acoustic noise
Output filters are mean to filter the signal coming out of the drive feeding the motor. Filter type dv/dt
reactor, like RWK5420 series, allow to reduce the voltage rise (dv/dt) visible by the motor. This re-
duces the stress on the motor insulation, reduce the temperature of the motor and thus increase its
total lifetime.
Sine wave filter offers more in terms of motor protection by providing a sinusoidal phase to phase volt-
age to the motor, this will bring the stress on the insulation and the temperature rise to the minimum
physically possible level. In addition, the usage of sine wave filter reduces the current flowing between
the rotor and the stator through the motor bearing (i.e. bearing current)*, increasing further more the
service life time of the motor. Finally, sine wave filter reduces motor acoustic noise, improving the
comfort at the facility where the motor is installed.
*In case of problem with bearing current, sine wave filter plus addons type FN5030 would eliminate the flashover created at
switching, increasing even more the bearing total lifetime.
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
020 40 60 80 100
Switching frequency (fPWM) [kHz]
Cable length [m]
fPWM at 400V
fPWM at 480V

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2.1 Filter selection table FN5420 IP00
Table 4 FN5420 IP00 selection table
Filter
Rated current @ 45°C/up to 60Hz Typical motor drive power rating @ 400 V* Typical motor drive power rating @ 480 V** Nominal inductance Nominal capacitance*** Min. switching fre- quency Typical Power Loss at rated current 400V 50Hz ,45°C, and full load**** Weight Terminal
[A] [kW] [kW] [mH] [µF] [kHz] [W] [kg]
FN5420-2.3-88-E0XXT 2.3 0.75 0.90 19.2 3x0.47 4 41 1.20 88
FN5420-3.1-88-E0XXT 3.1 1.1 1.3 14.2 3x0.68 4 45 1.55 88
FN5420-5.9-88-E0XXT 5.9 2.2 2.6 7.48 3x1.5 4 76 2.2 88
FN5420-10-88-E0XXT 10.2 4.0 4.8 4.32 3x2.2 4 91 5.1 88
FN5420-13-89-E0XXT 13.2 5.5 6.6 3.34 3x3.0 4 123 5.5 89
FN5420-18-89-E0XXT 18 7.5 9.0 2.45 3x3.7 4 150 6.6 89
FN5420-26-92-E0XXT 26 11 13 1.70 3x5 4 127 9.5 92
FN5420-32-92-E0XXT 32 15 18 1.38 3x6 4 196 11.9 92
FN5420-38-92-E0XXT 38 19 22 1.16 3x8 4 229 12.1 92
FN5420-45-92-E0XXT 45 22 26 0.980 3x8 4 272 13.7 92
FN5420-60-92-E0XXT 60 30 36 0.735 3x12 4 283 18.5 92
FN5420-75-99-E0XXT 75 37 44 0.588 3x15 4 154 21.5 99
FN5420-90-99-E0XXT 90 45 54 0.490 3x20 4 239 25.0 99
FN5420-110-99-E0XXT 110 55 66 0.401 3x20 4 283 28.5 99
FN5420-145-99-E0XXT 145 75 90 0.304 3x100 2 472 56 99
FN5420-180-99-E0XXT 180 90 108 0.245 3x150 2 658 58 99
FN5420-200-99-E0XXT 200 110 132 0.221 3x150 2 707 60 99
FN5420-250-99-E0XXT 250 132 158 0.176 3x200 2 882 76 99
FN5420-300-99-E0XXT 302 160 192 0.146 3x250 2 936 98 99
FN5420-400-99-E0XXT 400 200 240 0.110 3x300 2 1023 128 99
FN5420-480-99-E0XXT 477 250 300 0.092 3x350 2 1318 155 99
FN5420-630-99-E0XXT 630 315 378 0.070 3x500 2 1459 185 99
FN5420-710-99-E0XXT 710 355 426 0.062 3x550 2 1922 220 99
FN5420-800-99-E0XXT 800 400 480 0.055 3x600 2 2062 262 99
FN5420-1000-99-E0XXT 1000 500 600 0.044 3x750 2 2315 366 99
**** General purpose four-pole (1500 r/min) AC induction motor rated 400 V/50 Hz.
**** General purpose four-pole (1500 r/min) AC induction motor rated 480 V/50 Hz.
****Total capacitance value between phases. Capacitor connection in delta (Δ) for all versions.
**** See section 3.3 for calculation of the filter power loss at other operation point. Exact value depends on the motor cable
length and type, switching frequency and further stray parameters of the system.

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2.2 Filter selection table FN5420 IP20
Table 5 FN5420 IP20 selection table
Filter
Rated current @ 45°C up to 60Hz Typical motor drive power rating @ 400 V* Typical motor drive power rating @ 480 V** Nominal inductance Nominal capacitance*** Min. switching fre- quency Typical Power Loss at rated current 400V 50Hz ,45°C, and full load**** Weight Terminal Frame size
[A] [kW] [kW] [mH] [µF] [kHz] [W] [kg]
FN5420-2.3-44-E2XXT 2.3 0.75 0.90 19.2 3x0.47 4 41 2.4 44 A
FN5420-3.1-44-E2XXT 3.1 1.1 1.3 14.2 3x0.68 4 45 2.8 44 A
FN5420-5.9-44-E2XXT 5.9 2.2 2.6 7.48 3x1.5 4 76 4.0 44 B
FN5420-10-44-E2XXT 10.2 4.0 4.8 4.32 3x2.2 4 91 6.8 44 B
FN5420-13-44-E2FXT 13.2 5.5 6.6 3.34 3x3.0 4 123 7.2 33 C
FN5420-18-33-E2FXT 18 7.5 9.0 2.45 3x3.7 4 150 7.9 33 C
FN5420-26-33-E2FXT 26 11 13 1.70 3x5 4 127 11.8 33 C
FN5420-32-33-E2FXT 32 15 18 1.38 3x6 4 196 14.2 33 C
FN5420-38-33-E2FXT 38 19 22 1.16 3x8 4 229 14.4 33 C
FN5420-45-34-E2FXT 45 22 26 0.980 3x8 4 272 21 34 D
FN5420-60-34-E2FXT 60 30 36 0.735 3x12 4 283 25 34 D
FN5420-75-35-E2FXT 75 37 44 0.588 3x15 4 154 30 35 E
FN5420-90-35-E2FXT 90 45 54 0.490 3x20 4 239 34 35 E
FN5420-110-35-E2FXT 110 55 66 0.401 3x20 4 283 37.5 35 E
**** General purpose four-pole (1500 r/min) AC induction motor rated 400 V/50 Hz.
**** General purpose four-pole (1500 r/min) AC induction motor rated 480 V/50 Hz.
****Total capacitance value between phases. Capacitor connection in delta (Δ) for all versions.
**** See section 3.3 for calculation of the filter power loss at other operation point Exact value of the complete system depends
on the motor cable length and type, switching frequency and further stray parameters of the system.

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2.3 Filter selection table RWK5420
Table 6 RWK5420 selection table
Filter
Rated current @ 45°C/up to 60Hz Typical motor drive power rating @ 400 V* Typical motor drive power rating @ 480 V** Nominal inductance Typical Power Loss at rated current 400V 50Hz ,45°C, and full load*** Weight Terminal
[A] [kW] [kW] [mH] [W] [kg]
RWK5420-2.3-88-E0XXT 2.3 0.75 0.90 19.2 41 1.05 88
RWK5420-3.1-88-E0XXT 3.1 1.1 1.3 14.2 45 1.40 88
RWK5420-5.9-88-E0XXT 5.9 2.2 2.6 7.48 76 2.0 88
RWK5420-10-88-E0XXT 10.2 4.0 4.8 4.32 91 4.8 88
RWK5420-13-89-E0XXT 13.2 5.5 6.6 3.34 123 5.1 89
RWK5420-18-89-E0XXT 18 7.5 9.0 2.45 150 6.2 89
RWK5420-26-92-E0XXT 26 11 13 1.70 127 8.9 92
RWK5420-32-92-E0XXT 32 15 18 1.38 196 11.2 92
RWK5420-38-92-E0XXT 38 19 22 1.16 229 11.4 92
RWK5420-45-92-E0XXT 45 22 26 0.980 272 12.8 92
RWK5420-60-92-E0XXT 60 30 36 0.735 283 17.5 92
RWK5420-75-99-E0XXT 75 37 44 0.588 154 20.3 99
RWK5420-90-99-E0XXT 90 45 54 0.490 239 23.6 99
RWK5420-110-99-E0XXT 110 55 66 0.401 283 27.1 99
RWK5420-145-99-E0XXT 145 75 90 0.304 472 51 99
RWK5420-180-99-E0XXT 180 90 108 0.245 658 52 99
RWK5420-200-99-E0XXT 200 110 132 0.221 707 54 99
RWK5420-250-99-E0XXT 250 132 158 0.176 882 69 99
RWK5420-300-99-E0XXT 302 160 192 0.146 936 90 99
RWK5420-400-99-E0XXT 400 200 240 0.110 1023 118 99
RWK5420-480-99-E0XXT 477 250 300 0.092 1318 136 99
RWK5420-630-99-E0XXT 630 315 378 0.070 1459 164 99
RWK5420-710-99-E0XXT 710 355 426 0.062 1922 200 99
RWK5420-800-99-E0XXT 800 400 480 0.055 2062 239 99
RWK5420-1000-99-E0XXT 1000 500 600 0.044 2315 339 99
**** General purpose four-pole (1500 r/min) AC induction motor rated 400 V/50 Hz.
**** General purpose four-pole (1500 r/min) AC induction motor rated 480 V/50 Hz.
****See section 3.3 for calculation of the filter power loss at other operation point Exact value of the complete system depends
on the motor cable length and type, switching frequency and further stray parameters of the system.

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2.4 Derating
Sine wave filter FN5420 and dv/dt reactor RWK5420 might be applied with derated current when it is
applied beyond specification. Below is the calculation of temperature derating and motor frequency de-
rating.
2.4.1 Temperature derating
All sine wave filter FN5420 series and dv/dt reactor RWK5420 series are able to operate at rated cur-
rent up to an ambiante temperature of 45°C (measured next to the device, i.e. inside a cabinet). It is
possible to use the filter and reactor above this limit, but a derating must be applied on the maximum
current going through the filter.
The derating calculation is as follow:
 =� −
 −
 =ℎ
 =
 =45°
 =(ℎ),must be ≥
 =ℎ()
Please note that the maximum allowed temperature is a fixed value from the product specification, but
it is not the same depending on the filter size (smaller filter have a higher tolerance).
Filter type
Maximum allowed ambient temperature (T
max
)
FN5420 sizes 2.3A to 18A
100°C
FN5420 sizes 26A to 1000A
70°C
RWK5420 sizes 2.3A to 18A
100°C
RWK5420 sizes 26A to 1000A
100°C
Note that you can use a spreadsheet to easily calculate the result as follow:
I
nom
[A]
75
T
amb
[°C]
50
T
nom
[°C]
45
T
max
[°C]
70
I
derated
[A]
Formula
Formula: =Inom*SQRT((Tmax-Tamb)/(Tmax-Tnom))

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2.4.2 Motor frequency derating
All sine wave filter FN5420 series and dv/dt reactor RWK5420 series can operate at rated current for a
motor frequency up to 60Hz. They can also operate in case of increased motor speed with motor
frequency up to 200Hz by applying a derating on the maximum current allowed in the filter or reactor.
For motor frequency of 100Hz the maximum allowed current in the filter or reactor must be derated to
90% of its rated value (0.9 times the value from the datasheet or value calculated according to the
ambient temperature derating).
For motor frequency of 200Hz the maximum allowed current in the filter or reactor must be derated to
50% of its rated value (0.5 times the value from the datasheet or value calculated according to the
ambient temperature derating).
All intermediary values can be optain from the curve in Figure 5
Figure 5 Curve of the current derating according to the motor frequency
2.4.3 Calculation example of derating
Example 1: to select a 10A sine wave filter for a 400V 50Hz application that will be running in a cabinet
where the ambient temperature can reach up to 60°C. The 10.2A will obsiouly not fit as we need to ap-
ply a derating due to the ambient temperature higher than 45°C. We would select the size above,
13.2A to make the calculation.
 =� −
 − =13.2�100 −60
100 −25 =11
20
30
40
50
60
70
80
90
100
110
20 40 60 80 100 120 140 160 180 200 220
Max. current [%]
Motor frequency [Hz]

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3 Filter description
3.1 General electrical specifications FN5420
Nominal operating voltage:
3x 480 V AC
Rated operating voltage:
3x 530 V AC
Operating frequency:
Up to 60 Hz (up to 200Hz with derating)
Network:
TN, TT, IT
Minimum switching frequency
2.3 to 110A = 4kHz
145 to 1000A = 2kHz
Maximum switching frequency
16 kHz
Residual ripple voltage
<5% at nominal operation
High potential test voltage:
1)
P E 2480 VAC (1s)
Overvoltage Category (IEC60664-1):
III
Protection category:
IP 00, IP 20
Pollution degree:
PD3 (according to standard IEC 60664-1)
Cooling:
IP00: AN
IP20: AF 2m/s
Overload capability:
1.5x rated current for 1 minute, once per hour
Capacitive current @ no load:
<20% of rated input current, at 400 V AC
Ambient temperature range:
-40°C to +45°C fully operational
-40°C to +70°C with derating
3)
for sizes ≥ 26A
-40°C to +100°C with derating
3)
for sizes ≤ 18A
-40°C to +85°C transportation and storage
Climatic Class (IEC60068-1):
40/070/21
Flammability class:
UL 94V-0
Insulation class of magnetic components:
N (200°C)
Design corresponding to:
UL 61800-5-1, EN 61800-5-1
MTBF @ 45°C/400 V (Mil-HB-217F):
>500,000 hours
MTTR:
IP00: 20 min (capacitor replacement)
IP20: 30 min (capacitor and fan replacement)
Lifetime (calculated):
≥10 years with maintenance
Safety monitor output signal:
Thermal switch NC 180° C (UL-approved) to detect
overload of chokes
1) Repetitive tests to be performed at max. 80% of above levels, for 2 seconds.
2) Magnetic current gives the limit of saturation, above this value the performance cannot be guarantee.
3) See applicable derating in section 2.4.1

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3.2 General electrical specifications RWK5420
Nominal operating voltage:
3x 480 V AC
Rated operating voltage:
3x 530 V AC
Operating frequency:
Up to 60 Hz (up to 200Hz with derating)
Network:
TN, TT, IT
Minimum switching frequency
None
Maximum switching frequency
16 kHz
Residual ripple voltage
<5% at nominal operation
High potential test voltage:
1)
P

E 2480 VAC (1s)
Overvoltage Category (IEC60664-1):
III
Protection category:
IP 00
Pollution degree:
PD3 (according to standard IEC 60664-1)
Cooling:
Natural cooling (AN)
Overload capability:
1.5x rated current for 1 minute, once per hour
Ambient temperature range:
-40°C to +45°C fully operational
-40°C to +100°C with derating
3)
-40°C to +100°C transportation and storage
Climatic Class (IEC60068-1):
40/100/21
Flammability class:
UL 94V-0
Insulation class of magnetic components:
N (200°C)
Design corresponding to:
EN 61558-2-20 or EN 60076-6
MTBF @ 45°C/400 V (Mil-HB-217F):
>500,000 hours
Lifetime (calculated):
≥10 years with maintenance
Safety monitor output signal:
Thermal switch NC 180° C (UL-approved) to detect
overload of chokes
1) Repetitive tests to be performed at max. 80% of above levels, for 2 seconds.
2) Magnetic current gives the limit of saturation, above this value the performance cannot be guarantee.
3) See applicable derating in section 2.4.1