Danfoss VLT AutomationDrive FC 301 Programming Manual page 136

Parameter Descriptions
14-10 Mains Failure
Note:
Options [1], [2], [5], [7] are not active when the option [2] Torque
is selected in parameter 1-00 Configuration Mode.
Option:
3 3
14-11 Mains Voltage at Mains Fault
Range:
Size [180
related - 600
*
V]
134
VLT
Function:
A Normal Operation
B Mains failure
C Kinetic back-up
D Mains return
E Kinetic back-up, ramping to trip
F Trip
Table 3.26 Legend to Illustration 3.56
If the ramp is quicker than the system's ramp
down on, the ramping is done generatoric. This
results in a higher U which is limited using the
DC
brake chopper/resistor brake.
A B C D
U DC [V]
U DC
U DC
14-11*1.35
n [RPM]
Ref
0
Illustration 3.57 [7] Kinetic Back-Up, trip with
recovery where mains return below 14-15 Kin.
Backup Trip Recovery Level. In this illustration a
quick ramp is used.
A Normal Operation
B Mains failure
C Kinetic back-up
D Mains return
E Kinetic back-up ramping to trip
F Trip
Table 3.27 Legend to Illustration 3.57
Limitation:
See the introduction text in 14-10 Mains Failure
Function:
This parameter defines the threshold voltage
at which the selected function in 14-10 Mains
Failure should be activated. It may be
considered to choose 90% of the nominal
mains as the detection level, depending on
the supply quality. For a supply of 380 V
14-11 Mains Voltage at Mains Fault should thus
be set to 342 V. This results in a DC detection
level of 462 V (14-11 Mains Voltage at Mains
Fault * 1.35)
®
AutomationDrive FC 301/302 Programming Guide
14-11 Mains Voltage at Mains Fault
Range:
14-12 Function at Mains Imbalance
Operation under severe main imbalance conditions reduces the
lifetime of the motor. Conditions are considered severe if the
motor is operated continuously near nominal load (e.g. a pump
E F
or fan running near full speed).
Option:
[0]
*
t [s]
t [s]
[1]
[2]
14-14 Kin. Backup Time Out
Range:
60 s [0 -
*
60 s]
14-15 Kin. Backup Trip Recovery Level
Range:
Size related
3.15.3 14-16 Kin. Backup Gain
14-16 Kin. Backup Gain
Range:
100 %
*
MG33MH02 - Rev. 2013-09-30
Function:
NOTICE
Note for converting between VLT 5000
and 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: 14-11 Mains
Voltage at Mains Fault (VLT 5000 level) =
Value used in VLT 5000 * 1,35/sqrt(2).
Trip
Warning
Disabled
Function:
This parameter defines the Kinetic Backup Time
Out in flux mode when running on low voltage
grids. If the supply voltage does not increase
above the value defined in 14-11 Mains Voltage at
Mains Fault +5% within the specified time, the
drive will then automatically run a controlled
ramp-down profile before stopping.
Function:
[ 0 - 60000.000 This parameter specifies the
*
ReferenceFeed- Kinetic Backup Trip
backUnit] Recovery Level. The unit is
defined in 0-02 Motor Speed
Unit.
Function:
[0 - 500 %] Enter the Kinetic Backup Gain value in
percent.
Function:
Trips the
frequency
converter
Issues a warning
No action