Op-
tion
Name
Description
SP-11*1.35
Ref
790 V
0
A B
C
D
e3
0b
c9
20
.1
0
U
DC
[V]
n [RPM]
t [S]
U
DC
t [S]
Illustration 75: Kinetic Back-up Trip
A
Normal operation
B
Mains failure
C
Kinetic back-up
D
Trip
[6]
Alarm
[7]
Kin.
back-
up, trip
w re-
covery
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 drive 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] Kin. back-up, trip w recovery
is
parameter 14-11 Mains Fault Voltage
Level
x 1.35.
Ref
U
DC
SP-15
A B C D
E
A
e3
0b
c9
22
.1
0
U
DC
[V]
n [RPM]
t [S]
t [S]
SP-11*1.35
Illustration 76: Kinetic Back-up Trip w/Recovery, Mains Returns Above Parameter 14-15 Kin. Back-up Trip Recovery Level
A
Normal operation
B
Mains Failure
C
Kinetic back-up
D
Mains return
E
Normal operation: Ramping
If mains returns while in kinetic back-up 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. 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).
SP-11*1.35
Ref
U
DC
A B C D
E
F
e3
0b
c9
23
.1
0
0
U
DC
[V]
n [RPM]
t [S]
t [S]
Illustration 77: Kinetic Back-up Trip w/Recovery, Slow Ramp, Mains Returns Below Parameter 14-15 Kin. Back-up Trip Re-
covery Level
A
Normal operation
B
Mains failure
C
Kinetic back-up
D
Mains return
E
Kinetic back-up, ramping to trip
F
Trip
AU373327181955en-000101 / 130R1208
268 | Danfoss A/S © 2021.08
Parameter Descriptions
VLT® AutomationDrive EZ FC 321
Programming Guide
Содержание VLT AutomationDrive EZ FC 321
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