Danfoss VLT AutomationDrive FC 360 Programming Manual page 236

Programming Guide | VLT® AutomationDrive FC 360
Option
[5]
[6]
[7]
[10]
A B
U [V]
DC
U DC
SP-11*1.35
n [RPM]
Ref
Figure 43: Kinetic Back-up
234
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Name
Kinetic back-up, trip
Alarm
Kin. back-up, trip w recovery
Quick ramp-down
D E
C A
t [S]
t [S]
Description
The difference between kinetic back-up
with and without trip is that the latter
always ramps down to 0 RPM and trips,
regardless of whether mains return or not.
The function is made so that it does not
even detect if mains return. This is the
reason for the relatively high level on the
DC link during ramp down.
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, which is configurable
in parameter 14-15 Kin. Back-up Trip
Recovery Level to enable detection of
mains returning. If the mains does not
return, the drive ramps down to 0 RPM
and trips. If mains return while kinetic
back-up is at a speed above the value
set 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. If mains return while kinetic
back-up is at a speed below parameter
14-15 Kin. Back-up Trip Recovery Level,
the drive ramps down to 0 RPM using the
ramp and then trips.
AU275649936274en-001401 / 130R0507