Op-
tion
Name
Description
If the ramp is quicker than the ramp-down speed of the application, the ramping generates current. This results
in a higher U
DC
, which is limited using the brake chopper/resistor brake.
14-11*1.35
UDC
0
UDC,b
Ref
A
B
C
D
E
F
e3
0b
c9
24
.1
0
U
n [RPM]
t [S]
DC [V]
t [S]
Illustration 78: Kinetic Back-up Trip w/Recovery, Quick Ramp, Mains Returns Below Parameter 14-15 Kin. Back-up Trip
Recovery Level
A
Normal operation
B
Mains failure
C
Kinetic back-up
D
Mains return
E
Kinetic back-up ramping to trip
F
Trip
Parameter 14-11 Mains Fault Voltage Level
Table 481: Parameter 14-11 Mains Fault Voltage Level
14-11 Mains Fault Voltage Level
Default value: Size related
Parameter type: Range, 100 - 800 V
Setup: All setups
Conversion index: 0
Data type: Uint16
Change during operation: True
This parameter defines the threshold voltage at which the function in
parameter 14-10 Mains Failure
is activated. Select the detec-
tion level depending on the supply quality. For a supply of 380 V, set
parameter 14-11 Mains Fault Voltage Level
to 342 V. This results
in a DC detection level of 462 V (
parameter 14-11 Mains Fault Voltage Level
x 1.35).
Parameter 14-12 Response to Mains Imbalance
Table 482: Parameter 14-12 Response to Mains Imbalance
14-12 Response to Mains Imbalance
Default Value: [0] Trip
Parameter Type: Option
Setup: All set-ups
Conversion Index: -
Data Type: Uint8
Change during operation: True
Operation under severe main imbalance conditions reduces the lifetime of the motor. Conditions are considered severe if the motor
is operated continuously near nominal load (for example, a pump or a fan running near full speed).
Option
Name
Description
[0]*
Trip
Trips the drive.
[1]
Warning
Issues a warning.
[2]
Disabled
No action.
[3]
Derate
AU373327181955en-000101 / 130R1208 | 269
Danfoss A/S © 2021.08
Parameter Descriptions
VLT® AutomationDrive EZ FC 321
Programming Guide