Danfoss VLT AutomationDrive FC 361 Programming Guide

14-10 Mains Failure
Option: Function:
the relatively high level on the DC-
link during ramp down.
14-11*1.35
Ref
790 V
0
A B C D
130BC920.10
U
n [RPM]
t [S]
DC
U
DC
[V]
t [S]
A Normal operation
B Mains failure
C Kinetic back-up
D Trip
Illustration 4.41 Kinetic Back-up
Trip
[6] Alarm
[7] Kin. back-up,
trip w
recovery
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, congurable
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.
14-10 Mains Failure
Option: Function:
Ref
U
DC
14-15
A B C D EA
130BC922.10
U
DC
[V]
n [RPM]
t [S]
t [S]
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
is at the normal level (U
DC, m
x
1.35).
14-11*1.35
Ref
U
DC
A B C D E F
130BC923.10
0
U
DC
[V]
n [RPM]
t [S]
t [S]
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
Parameter Descriptions VLT® AutomationDrive FC 361
130 Danfoss A/S © 03/2019 All rights reserved. MG06J202
44

Danfoss VLT AutomationDrive FC 361 Specifications

General

Brand	Danfoss
Model	VLT AutomationDrive FC 361
Category	DC Drives
Language	English