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14-10 Mains Failure
Option:
Function:
A = Normal Operation D = Mains return
B = Mains failure
E = Kinetic back-up
ramping to trip
C Kinetic back-up
F = Trip
Table 3.27
14-11 Mains Voltage at Mains Fault
Range:
Function:
Size
related
*
[180 -
600 V]
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
should thus be set to 342 V. This
results in a DC detection level of 462 V
(14-11 * 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:
(VLT 5000 level) =
Value used in VLT 5000 * 1,35/sqrt(2).
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
or fan running near full speed).
Option:
Function:
[0]
*
Trip
Trips the frequency
converter
[1]
Warning
Issues a warning
[2]
Disabled
No action
14-14 Kin. Backup Time Out
Range:
Function:
60 s
*
[0 - 60
s]
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 prior to stop.
14-15 Kin. Backup Trip Recovery Level
Range:
Function:
Size related
*
[ 0.000 - 60000.000
ReferenceFeedbackUnit]
This parameter specifies
the Kinetic Backup Trip
Recovery Level. The unit
is defined in
Parameters for configuring auto reset handling, special trip
handling and control card self test or initialisation.
14-20 Reset Mode
Option:
Function:
Select the reset function after
tripping. Once reset, the frequency
converter can be restarted.
[0]
*
Manual reset
Select
[0] Manual reset
, to perform a
reset via [RESET] or via the digital
inputs.
[1]
Automatic reset x 1
Select
[1]-[12] Automatic reset x 1…
x20
to perform between one and
twenty automatic resets after
tripping.
[2]
Automatic reset x 2
[3]
Automatic reset x 3
[4]
Automatic reset x 4
[5]
Automatic reset x 5
[6]
Automatic reset x 6
[7]
Automatic reset x 7
[8]
Automatic reset x 8
[9]
Automatic reset x 9
[10] Automatic reset x 10
[11] Automatic reset x 15
[12] Automatic reset x 20
[13] Infinite auto reset
Select
[13] Infinite Automatic Reset
for
continuous resetting after tripping.
[14] Reset at power-up
NOTE
The motor may start without warning. If the specified
number of AUTOMATIC RESETs is reached within 10
minutes, the frequency converter enters Manual reset [0]
mode. After the Manual reset is performed, the setting of
14-20 Reset Mode
reverts to the original selection. If the
number of automatic resets is not reached within 10
minutes, or when a Manual reset is performed, the internal
AUTOMATIC RESET counter returns to zero.
NOTE
Automatic reset will also be active for resetting safe stop
function in firmware version < 4.3x.
Parameter Descriptions
VLT
®
AutomationDrive Programmming Guide
132
MG33ME02 - VLT
®
is a registered Danfoss trademark
3
3
Содержание VLT AutomationDrive FC 300 Series
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