34
6.4
Selection of the switching-frequency
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
HV 2.1f - 3.11f
