Italtecnica Nettuno 2.0 Manual De Instrucciones página 43

GROUP 1 : MOTOR PARAMETERS
1.0 Motor rated
Current
The trip time of the current overload safety device is inversely proportional to the entity of the overload in progress;
therefore, a slight overload will lead to a more delayed trip time while a more significant overload will accelerate
.
the trip time
1.1 Motor
Direct
1.2 Minimum
Freq. 25 Hz
1.3 Stop
freq.
and the pressure remains constant despite the reduction in rotation speed, the pump is stopped correctly. If the pump
does not stop, try to increase this value. Otherwise, in case of continuous pump cycling, try to lower the stop
frequency value. To enable correct execution of the shutdown ramp, the stop frequency must be at least 5 Hz above
the set minimum frequency in parameter 1.2.
1.4 Motor rated
freq.
1.5 Switching
freq. 5 KHz
electric motor (especially with long cables). Low switching frequency values are recommended for medium-large
pumps, where there is a long distance between the inverter and motor or high ambient temperatures.
1.6 Frequency
corr. 0
necessary when a slightly higher electric pump performance is required. While no particular precautions exist in
lowering the maximum frequency, its increase must be carefully evaluated after having consulted the manufacturer
of the electric pump and taking into consideration the maximum current supported by the inverter and the electric
motor.
1.0 – Motor current: this parameter enables entry of the maximum
current absorbed by the electric pump in routine conditions, to enable shut-
down of the motor in the event of excessive absorption. Shut-down occurs
also if the current is unbalanced between phases by more than 25% with
0.5A
respect to the set maximum value.
1.1 - Direction of rotation: this screen enables the user to invert the
rotat.
direction of rotation of the electric pump without modification to the
electric motor wiring. To modify the direction of rotation of the motor, use
-->
keys "+" and "-"; the direction indicated by the arrow has a purely
indicative value and does not reflect the actual sense of rotation, which
must be verified by the installer.
1.2 - Minimum frequency: this parameter defines the minimum frequency
at which the pump is started up and defines the end of the ramp for
shutdown. For three-phase pumps a value of 25Hz is advised. Also consult
the information supplied by the manufacturer of the electric pump to
determine at what minimum frequency value the connected electric motor
can operate
1.3 - Stop frequency: this parameter defines the minimum frequency
motor
value, below which the motor is stopped. During regulation, if the set point
pressure value is reached and the motor frequency is below this value, the
31 Hz
inverter attempts to stop the pump (the motor frequency is decreased to the
value set in parameter 1.2 Minimum Frequency). If all utilities are closed
1.4 - Nominal motor frequency
is possible to select the maximum inverter output frequency (50 or 60 Hz).
Caution: an incorrect selection of the maximum frequency may cause
50 Hz
damage to the pump; consult the manufacturer's technical data carefully.
1.5 - Switching frequency: set the frequency of inverter switching. The
selectable values are 3, 5 and 10 kHz. Higher switching frequency values
may reduce the noise of the inverter and allow a more fluid regulation of the
motor but may cause increased temperatures in the electronic board, an
increase in electromagnetic disturbances and potential damage to the
1.6 - Frequency correction: this parameter enables entry of a deviation,
positive or negative, of the maximum frequency compared to the set
nominal value. It may be useful to set a negative deviation (down to –5Hz)
where a limit to the maximum power of the electric pump is wanted and to
Hz
avoid possible overload. A positive increase (up to +5Hz) may instead be
.
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depending on which motor is running, it