Before changing the switching frequency, disconnect the power supply,
otherwise the HYDROVAR power module could be destroyed.
A switching-frequency of 8kHz only should be selected if the HYDROVAR is mounted directly
on the motor in order to reduce the noise level.
In case of longer motor cables the switching-frequency should be decreased to reduce losses
in the cable as well as the temperature in the motor.
For applications with submersible pumps select 2,5kHz switching-frequency.
SW switching-
1 2
OFF OFF 8kHz (standard)
ON OFF 5kHz
OFF ON 4kHz
ON ON 2.5kHz
6.5 Reduction of the maximum output current
When a motor with lower nominal power is used, the max. output current should be adjusted
accordingly. Only possible for HV 2.1 f - 3.11 f
Output current [A] HV
Type
100% 85% 65% 50%
2.1 7.00 5.95 4.55 3.50
2.2 10.00 8.50 6.50 5.00
3.2 5.70 4.85 3.71 2.85
3.3 7.00 5.95 4.55 3.50
3.4 9.00 7.65 5.85 4.50
3.5 13.50 11.48 8.78 6.75
3.7 17.00 14.45 11.05 8.50
3.11 23.00 19.55 14.95 11.50
Possible
setting
SW30
A
SW30
B
SW31
A
SW31
B
100% ON OFF OFF OFF
85% OFF ON OFF OFF
65% OFF OFF ON OFF
50% OFF OFF OFF ON
The reduction of the maximum output
current also affects the Overload-detection!
SW 30/SW 31
DIP-Switches to
decrease the max.
output current
DIP-Switch to
select the
switching
frequency
HV 3.15e - 3.45e
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