Xylem HYDROVAR (HV2.1 - 3.45) - Manual (Page 35)

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6.6 RFI - switch
For the HYDROVAR types HV2.1 – HV3.22 there are installed new additional filter capacitors,
which provides an improved filter characteristic in order to avoid RFI (Radio Frequency
Interferences) when mounting the HYDROVAR on the wall and using longer cables between
the HYDROVAR and the motor.
This filter element is switch able and is deactivated in the default setting (switch contact
opened), because for standard mounting version (motor mounted and using standard motor
cable length) the filter is not required.
The filter should be only activated in case of separate mounting (Wall mounted versions) of
the HYDROVAR.
NOTE: Due to the additional filter capacity the earth leakage current will increase, if the filter
is activated. Therefore in case of using ELCB-relays (earth-leakage circuit breakers, RCD), they
must be suitable for VFDs (suitable for protecting equipment with a DC-content in the faulty
current) as well as suitable for a high leakage current => 300mA.
HV 2.1f / 2.2f HV 3.2f – 3.11f
HV 3.15f – 3.22f
Switch contact
Opened: RFI filter function deactivated (default setting)
Closed: RFI filter function activated (for wall mounted version)
WARNING: The switch may not be operated in case the HYDROVAR is still connected to the
mains supply. Before changing the position of the switch (ON/OFF) you have to be sure that
the HYDROVAR is disconnected from the mains supply.