Danfoss VLT AutomationDrive FC 300 Programming Manual page 140

Parameter Descriptions
14-10 Mains Failure
Option:
3 3
14-11 Mains Voltage at Mains Fault
Range:
Size [180 -
related 600 V]
*
138
VLT
Function:
A B C D
U DC [V]
U DC
U DC
14-11*1.35
n [RPM]
Ref
0
Illustration 3.58 [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 3.58
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)
NOTE
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).
MG33MG02 - VLT
®
AutomationDrive Programming Guide
14-12 Function at Mains Imbalance
Operation under severe main imbalance conditions reduces the
lifetime of the motor. Conditions are considered severe if the
E F
motor is operated continuously near nominal load (e.g. a pump
or fan running near full speed).
Option:
t [s]
[0]
t [s] [1]
[2]
14-13 Mains Failure Step Factor
Range:
1 [0 - 5 ] This parameter defines a factor multiplied with the
*
14-14 Kin. Backup Time Out
Range:
60 s [0 - 60
*
s]
14-15 Kin. Backup Trip Recovery Level
Range:
Size related
Parameters for configuring auto reset handling, special trip
handling and control card self test or initialisation.
14-20 Reset Mode
Option:
[0] Manual reset
[1] Automatic reset x 1
[2] Automatic reset x 2
[3] Automatic reset x 3
[4] Automatic reset x 4
[5] Automatic reset x 5
®
is a registered Danfoss trademark
Function:
Trip Trips the frequency
converter
Warning Issues a warning
Disabled No action
Function:
step in frequency and voltage calculated based on
load.
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
*
ReferenceFeedbackUnit] the Kinetic Backup Trip
Recovery Level. The unit
is defined in 0-02 Motor
Speed Unit.
Function:
Select the reset function after
tripping. Once reset, the frequency
converter can be restarted.
Select [0] Manual reset, to perform a
reset via [Reset] or via the digital
inputs.
Select [1]-[12] Automatic reset x 1...x20
to perform between one and twenty
automatic resets after tripping.