Schaffner RWK305 Operating manual

Schaffner EMV AG
Nordstrasse 11e |4542 Luterbach |Switzerland |Main [phone] |schaffner.com
USER AND INSTALLATION MANUAL
3-Phase Load Reactor RWK305

1/4 User and installation manual 3-Phase Load Reactor RWK305
Revision: 04 (June 2023)
English version (original instructions)
Please also read and follow the “General safety notes and installation guidelines” provided with the
product. More technical information of RWK305 can be found from the datasheets of the products
available at schaffner.com.
Version history
Revision
Date
Description
01 (A)
August 2015
Initial version
02 (B)
April 2017
Addition of RWK212 series in the same document
03 (C)
May 2017
Addition of page 2, required drives settings and fPWM vs motor cable
length chart
04 (D)
June 2023
New Schaffner branding template
Removal of EOL RWK212 series
Clarification of the mounting positions
Filter placement and mounting
Lift the heavy reactors which do have lifting eyes with appropriate lifting aids –smaller types may be
lifted manually by two persons (no lifting eye bolt applicable). RWK305 is a 3-phase load reactors device
and should be wired in series and positioned on the output side of the VSD (VFD). All terminals marked.
U1, V1, and W1 are the input terminals where the 3 phases of incoming power are to be wired. As a
result, U2, V2, and W2 are the output terminals.
The mounting of RWK305 shall be made on a metal plate which has a reliable protective
earth (PE)connection.
Always connect RWK305 to the protective earth (PE) first, and then continue with
the wiring of line terminals. When decommissioning the RWK305 remove the PE
connection at the end.
RWK305 reactors can reach surface temperatures up to 175°C when driven under
maximum allowed load. Avoid burnings by waiting long enough after that the application
is switched off.
Ambient temperature and clearance
RWK305 shall be installed where the ambient temperature does not exceed 100°C. Do not locate the
reactor next to any other component with operating surface temperature above 125°C.
RWK305 reactors can be used to a maximum altitude of 2000m without derating, and with derating
(current and voltage) above 2000m according to IEC 60664-1.

User and installation manual 3-Phase Load Reactor RWK305 2/4
RWK305 reactors are designed to be floor-
mounted or wall-mounted. In principle, the
reactors shall be mounted vertically to respect a
proper heat dissipation flow. To ensure an
optimal ventilation and thermal radiation, it is
recommended to leave enough space towards
surrounding equipment, walls or components in
all directions.
For floor-mounting, clearance above the
filter of >150mm and >50mm aside is
required.
RWK305
Drive
>150mm
>150mm
>50mm
>50mm
The recommended, permitted and prohibited mounting positions are shown in Figure 1 to Figure 4. The
mounting on a vertical plate is limited to products with a maximum weight of 25kg. Larger reactors
must be mounted in a horizontal position.
Figure 1 Recommended mounting positions
(Floor mounting)
Figure 2 Wall mounting
Figure 3 Permitted mounting positions
Figure 4 Prohibited mounting positions
Use all available mounting holes and select the correct screws and washers (more information please
refer to the product datasheet) to ensure reliable mounting and consider the weight of these products.
Apply torques appropriate for the strength class of the screws and washers you are using. Specifications
can be obtained from the supplier of the screws and washers.
< 25 kg

3/4 User and installation manual 3-Phase Load Reactor RWK305
Required drives settings
Ensure the motor drive switching frequency (fPWM) is set to the required switching frequency. Check
the drives manual whether special settings are necessary. For any questions, please contact the drive
manufacturer. Refer to the following “fPWM/motor cable length” diagram:
Figure 5 relation curve between fPWM and motor cable length
If the drives settings are not correct, the dv/dt effect may not be sufficient to protect the
motor winding insulation and the filter may be damaged!

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Schaffner EMV AG
Nordstrasse 11e |4542 Luterbach |Switzerland |Main [phone] |schaffner.com
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