Danfoss VLT AutomationDrive FC 361 Programming Manual page 132

Parameter Descriptions
14-10 Mains Failure
Option:
4 4
[6] Alarm
[7] Kin. back-up,
trip w
recovery
130
VLT® AutomationDrive FC 361
Function:
the relatively high level on the DC-
link during ramp down.
A B C D
U [V]
DC
790 V
U DC
14-11*1.35
t [S]
n [RPM]
Ref
0
t [S]
A Normal operation
B Mains failure
C Kinetic back-up
D Trip
Illustration 4.41 Kinetic Back-up
Trip
+
This option is valid in VVC only.
Kinetic back-up with recovery
combines the features of kinetic
back-up and kinetic back-up with
trip. This feature makes it possible
to select between kinetic back-up
and kinetic back-up with trip, based
on a recovery speed, configurable
in parameter 14-15 Kin. Back-up Trip
Recovery Level. If mains does not
return, the frequency converter
ramps down to 0 RPM and trips. If
mains returns while in kinetic back-
up at a speed above the value in
parameter 14-15 Kin. Back-up Trip
Recovery Level, normal operation is
resumed. This is equal to [4] Kinetic
Back-up. The DC level during [7]
Kinetic back-up is
parameter 14-11 Mains Fault Voltage
Level x 1.35.
Danfoss A/S © 03/2019 All rights reserved.
14-10 Mains Failure
Option: Function:
14-11*1.35
A Normal operation
B Mains failure
C Kinetic back-up
D Mains return
E Normal operation: ramping
Illustration 4.42 Kinetic Back-Up,
Trip with Recovery where Mains
Returns above
Parameter 14-15 Kin. Back-up Trip
Recovery Level
If mains return while in kinetic
back-up at a speed below
parameter 14-15 Kin. Back-up 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 mechanically and
U
DC
1.35).
14-11*1.35
A Normal operation
B Mains failure
C Kinetic back-up
D Mains return
E Kinetic back-up, ramping to trip
F Trip
Illustration 4.43 Kinetic Back-Up,
Trip with Recovery, Trip Slow
Ramp where Mains Returns
below Parameter 14-15 Kin. Back-
up Trip Recovery Level, in this
Illustration a Slow Ramp is Used
A B C D A E
U [V]
DC
U
DC
t [S]
n [RPM]
Ref
14-15
t [S]
is at the normal level (U x
DC, m
A B C D E F
U [V]
DC
U
DC
t [S]
n [RPM]
Ref
0
t [S]
MG06J202