Xylem HYDROVAR HV 4.150 / 4.185 / 4.220 - Manual (Page 36)

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9.4.4 RFI – switch
For HYDROVAR HV4.055 – HV4.220 additional filter capacitors are included, which provide
an improved filer characteristic in order to avoid RFI (Radio Frequency Interfaces) when the
HYDROVAR is used as wall mounted device with longer motor cables between the
HYDROVAR and the motor.
In general the default settings should not be changed and remain in default position.
NOTE: Due to the additional filter capacity the earth leakage current will increase, if the
filter is active. Therefore in case of using ELCB-relays (earth-leakage circuit breakers, RCD),
they must be suitable for VFD’s (see also chapter 9.1).
HV4.150 – HV4.220 switch S1 and S2
S1 – used only for internal high voltage testing
Closed (default setting): should not be changed
be the end user
Open: only for tests done by the manufacturer
S2 – activation HF filter capacitor
Closed (default setting): RFI filter active for
symmetric power supply net (standard in mainly
all countries)
Open: RFI filter deactivated for asymmetric
power supply net (e.g. USA).
HV4.055
– HV4.110
(Placed at the front side of the
HYDROVAR under the control card)
S1 – activation HV filter capacitor
Open (default setting): change of position
by the end user only after consultation of your local
service partner.
Closed: only for specific requirements referred to
RFI
WARNING: The switch may not be opened in case the HYDROVAR is still connected to the
main supply. Before changing the position of the switch (ON/OFF) you have to be sure that
the HYDROVAR is disconnected from the mains supply.
S1
S2
S1