Danfoss VLT AutomationDrive FC 301 Programming Manual page 162

Parameter Descriptions
14-10 Mains Failure
Options [1] Ctrl. ramp-down, [2] Ctrl. ramp-down, trip, [5] Kinetic
back-up, trip, [7] Kin. back-up, trip w recovery are not active when
the option [2] Torque is selected in parameter 1-00 Configuration
Mode.
3 3
Option:
160
VLT
Function:
A B C D A
U [V]
DC
U
DC
14-11*1.35
n [RPM]
Ref
14-15
A Normal operation.
B Mains failure.
C Kinetic back-up.
D Mains return.
E Normal operation: ramping.
Illustration 3.58 Kinetic Back-Up, Trip with
Recovery where Mains Returns above
Parameter 14-15 Kin. Backup Trip Recovery
Level
If mains return while in kinetic back-up at a
speed below parameter 14-15 Kin. Backup Trip
Recovery Level, the frequency converter ramps
down to 0 RPM using the ramp and then trips. If
the ramp is slower than the system ramping
down on its own, the ramping is done mechan-
ically and U is at the normal level (U
DC
A B C D E
U [V]
DC
U
DC
14-11*1.35
n [RPM]
Ref
0
A Normal operation.
B Mains failure.
C Kinetic back-up.
D Mains return.
E Kinetic back-up, ramping to trip.
F Trip.
Illustration 3.59 Kinetic Back-Up, Trip with
Recovery, Trip Slow Ramp where Mains
Returns below Parameter 14-15 Kin. Backup
Trip Recovery Level, in this Illustration a Slow
Ramp is Used
If the ramp is quicker than the ramp down
speed of the application, the ramping generates
Danfoss A/S © 02/2016 All rights reserved.
®
AutomationDrive FC 301/302
14-10 Mains Failure
Options [1] Ctrl. ramp-down, [2] Ctrl. ramp-down, trip, [5] Kinetic
back-up, trip, [7] Kin. back-up, trip w recovery are not active when
the option [2] Torque is selected in parameter 1-00 Configuration
Mode.
Option:
E
t [S]
t [S]
14-11 Mains Voltage at Mains Fault
x1.35).
Range:
DC, m
Size
F
related
*
t [S]
t [S]
Function:
current. This results in a higher U
limited using the brake chopper/resistor brake.
A B C
U DC [V]
U DC
U DC
14-11*1.35
n [RPM]
Ref
0
A Normal operation.
B Mains failure.
C Kinetic back-up.
D Mains return.
E Kinetic back-up ramping to trip.
F Trip.
Illustration 3.60 Kinetic Back-Up, Trip with
Recovery where Mains Returns below
Parameter 14-15 Kin. Backup Trip Recovery
Level, in this Illustration a Quick Ramp is Used
Function:
[180 - This parameter defines the threshold voltage
600 V] at which the function in
parameter 14-10 Mains Failure is activated.
Select the detection level depending on the
supply quality. For a supply of 380 V, set
parameter 14-11 Mains Voltage at Mains Fault
to 342 V. This results in a DC detection level
of 462 V (parameter 14-11 Mains Voltage at
Mains Faultx1.35).
NOTICE
Converting from VLT 5000 to FC 300:
Even though the setting of the mains
voltage at mains fault is the same for
VLT 5000 and FC 300, the detection
level is different. Use the following
formula to obtain the same detection
level as in VLT 5000:
Parameter 14-11 Mains Voltage at Mains
Fault (VLT 5000 level) = value used in
VLT 5000 * 1.35/sqrt(2).
which is
DC
D E F
t [s]
t [s]
MG33ML02