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3.10 Main Menu - Special Functions - Group
14
3.10.1 14-0* Inverter Switching
14-01 Switching Frequency
Option:
Function:
Select the inverter switching frequency. Changing
the switching frequency can help to reduce
acoustic noise from the motor.
NOTE
The output frequency value of the frequency
converter must never exceed 1/10 of the
switching frequency. When the motor is
running, adjust the switching frequency in
until the motor is as
noiseless as possible.
NOTE
Not all choices are available in all power sizes.
[0]
Ran3
3kHz true random PWM (White noise modulation)
[1]
Ran5
5kHz true random PWM (white noise modulation)
[2]
2.0 kHz
[3]
3.0 kHz
[4]
4.0 kHz
[5]
5.0 kHz
[6]
6.0 kHz
[7]
8.0 kHz
[8]
10.0 kHz
[9]
12.0kHz
[10] 16.0kHz
14-03 Overmodulation
Option: Function:
[0]
Off Selects no overmodulation of the output voltage in
order to avoid torque ripple on the motor shaft.
[1]
*
On The over-modulation function generates an extra
voltage of up-to 8% of U
max
output voltage without
over-modulation, which results in an extra torque of
10-12% in the middle of the over-syncronous range
(from 0% at nominal speed rising to approximately 12%
at double nominal speed).
14-08 Damping Gain Factor
Range:
Function:
96.0 %
*
[0.0 - 100.0 %]
3.10.2 14-1* Mains On/Off
Parameters for configuring mains failure monitoring and
handling.
14-12 Function at Mains Imbalance
Option:
Function:
Operation under severe main imbalance conditions
reduces the lifetime of the motor. Conditions are
considered severe if the motor is operated contin-
uously near nominal load (e.g. a pump or fan
running near full speed).
When a severe mains imbalance is detected:
[0]
*
Trip
Select
Trip
[0] to trip the frequency converter.
[1]
Warning Select
Warning
[1] to issue a warning.
[2]
Disabled Select
Disabled
[2] for no action.
CAUTION
May cause reduced life time.
3.10.3 14-2* Trip Reset
14-20 Reset Mode
Option:
Function:
Select the reset function after tripping.
Once reset, the frequency converter
can be restarted.
[0]
*
Manual reset
Select
Manual reset
[0], to perform a
reset via [RESET] or via the digital
inputs.
[1]
Automatic reset x 1
Select
Automatic reset x 1…x20
[1]-[12]
to perform between one and twenty
automatic resets after tripping.
[2]
Automatic reset x 2
[3]
Automatic reset x 3
[4]
Automatic reset x 4
[5]
Automatic reset x 5
[6]
Automatic reset x 6
[7]
Automatic reset x 7
[8]
Automatic reset x 8
[9]
Automatic reset x 9
[10] Automatic reset x 10
[11] Automatic reset x 15
[12] Automatic reset x 20
[13] Infinite auto reset
Select
Infinite Automatic Reset
[13] for
continuous resetting after tripping.
Parameters
VLT HVAC Basic Drive Programming Guide
58
MG.18.B1.02 - VLT
®
is a registered Danfoss trademark
3
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