Danfoss VLT AutomationDrive FC 361 Programming Guide

14-10 Mains Failure
Option: Function:
If the ramp is quicker than the
ramp-down speed of the
application, the ramping generates
current. This results in a higher U
DC
,
which is limited using the brake
chopper/resistor brake.
14-11*1.35
U
DC
0
U
DC
Ref
A B C D E F
130BC924.10
U
n [RPM]
t [s]
DC
[V]
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 4.44 Kinetic Back-Up,
Trip with Recovery where Mains
Returns below
Parameter 14-15 Kin. Back-up Trip
Recovery Level, in this Illustration
a Quick Ramp is Used
14-11 Mains Fault Voltage Level
Range: Function:
Size
related*
[100 - 800 V] This parameter denes the
threshold voltage at which the
function in parameter 14-10 Mains
Failure is activated. Select the
detection level depending on the
supply quality. For a supply of 380
V, set parameter 14-11 Mains Fault
Voltage Level to 342 V. This results
in a DC detection level of 462 V
(parameter 14-11 Mains Fault Voltage
Levelx1.35).
14-11 Mains Fault Voltage Level
Range: Function:
NOTICE
Converting from VLT 5000 to
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
dierent. Use the following
formula to obtain the same
detection level as in VLT 5000:
Parameter 14-11 Mains Fault
Voltage Level (VLT 5000 level)
= value used in VLT 5000
x1.35/sqrt(2).
14-12 Response to 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 (for example,
a pump or a fan running near full speed).
Option: Function:
[0] * Trip Trips the frequency converter.
[1] Warning Issues a warning.
[2] Disabled No action.
[3] Derate
14-14 Kin. Back-up Time-out
Range: Function:
60 s* [0 - 60 s] This parameter denes the kinetic
back-up timeout when running on
low voltage grids. If the supply
voltage does not exceed the value
dened in parameter 14-11 Mains
Fault Voltage Level +5% within the
specied time, the frequency
converter then automatically runs a
controlled ramp-down prole
before stop.
14-15 Kin. Back-up Trip Recovery Level
Range: Function:
Size
related*
[ 0 -
60000.000
Reference-
FeedbackUnit]
This parameter species the kinetic
back-up trip recovery level. The unit
is dened in parameter 0-02 Motor
Speed Unit.
14-16 Kin. Back-up Gain
Range: Function:
100 %* [0 - 500 %] Enter the kinetic back-up gain value
in percent.
Parameter Descriptions Programming Guide
MG06J202 Danfoss A/S © 03/2019 All rights reserved. 131
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Danfoss VLT AutomationDrive FC 361 Specifications

General

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