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Parameter 40-14 Mains Loss Duration
Table 1352: Parameter 40-14 Mains Loss Duration
40-14 Mains Loss Duration
Default value: 60.00 s
Parameter type: Range, 0.05 - 60.00 s
Setup: All setups
Conversion index: -2
Data type: Uint16
Change during operation: True
Enter the maximum value of mains loss duration. When
parameter 14-10 Mains Failure
=
[4] Kinetic Back-up
, the DC-link voltage
boosts to the value set in
Parameter 40-10 Kin. Back-up UdcRef
. Then the drive returns to normal operation. The drive allows 2 succes-
sive mains faults. A 3
rd
mains fault triggers a trip. Setting this parameter to 60 s disables the function.
Parameter 40-15 Kin.Back-up Start Off
Table 1353: Parameter 40-15 Kin.Back-up Start Off
40-15 Kin.Back-up Start Off
Default value: Size related
Parameter type: Range, -200.0 - 200.0 V
Setup: All setups
Conversion index: -1
Data type: Uint16
Change during operation: True
Set the voltage offset to be added to the kinetic back-up reference to boost the gain when kinetic back-up is activated. This function
is used in low-inertia applications.
5.30.2 40-2* PM Motor Specific
N O T I C E
The following parameters are only available in FC 302:
Parameter 40-28 Back EMF Protection
Parameter 40-29 B-EMF Protection Log Readout
Parameter 40-28 Back EMF Protection
Table 1354: Parameter 40-28 Back EMF Protection
40-28 Back EMF Protection
Default value: [1] Enabled
Parameter type: Option
Setup: All setups
Conversion index: -
Data type: Uint8
Change during operation: False
The drive is protected by default from Back EMF, which can be generated by IPM or SPM motor types due to calculated speed limita-
tion. The actual limitation is based on
parameter 1-40 Back EMF at 1000 RPM
and protects the drive from motor-generated overvolt-
age.
C A U T I O N
By disabling the speed limitation, a risk of destructive effect on the IGBTs can be encountered when the drive loses the motor. If
the function is disabled, ensure to protect the drive by other means to prevent motor-generated overvoltage.
Option
Name
Description
[0]
Disabled
[1]*
Enabled
AU275636650261en-000101 / 130R0334 | 663
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Parameter Descriptions
VLT AutomationDrive FC 301/302
Programming Guide