Danfoss VLT AQUA Drive FC 200 Programming Manual page 107

Parameter Description
3 3
Illustration 3.38 Controlled Ramp Down, Longer Mains Failure.
Ramping down as long as the energy in the system allows for it,
then the motor is coasted.
Illustration 3.39 Kinetic Back-up, Short Mains Failure.
Ride through as long as the energy in the system allows for it.
Illustration 3.40 Kinetic Back-up, Longer Mains Failure.
The motor is coasted as soon as the energy in the system is too
low.
14-11 Mains Voltage at Mains Fault
Range:
Size related
*
V]
14-12 Function at Mains Imbalance
Option:
[0] Trip
*
[1] Warning Select [1] Warning to issue a warning.
[2] Disabled Select [2] Disabled for no action.
[3] Derate
Parameters for configuring auto reset handling, special trip
handling and control card self test or initialisation.
106
DC Voltage
Output Speed rpm
Over Voltage Control Level
Par 14-11
Time
Mains
DC Voltage
Output Speed rpm
Over Voltage Control Level
Par 14-11
Time
Mains
DC Voltage
Output Speed rpm
Over Voltage Control Level
Par 14-11
Time
Mains
Function:
[180 - 600 This parameter defines the threshold
voltage at which the selected function
in 14-10 Mains Failure should be
activated. The detection level is at a
factor 2 of the value in 14-11 Mains
Voltage at Mains Fault.
Function:
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).
When a severe mains imbalance is detected:
Select [0] Trip to trip the frequency converter.
Select [3] Derate for derating the frequency
converter.
MG20O602 - VLT
®
VLT AQUA Drive Programming Guide
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
[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
14-21 Automatic Restart Time
Range:
10 s
*
®
is a registered Danfoss trademark
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.
Select [13] Infinite Automatic Reset
for continuous resetting after
tripping.
NOTE
The motor may start without
warning. If the specified number
of AUTOMATIC RESETs is
reached within 10 minutes, the
frequency converter enters [0]
Manual reset 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.
Function:
[0 - 600 s] Enter the time interval from trip to start of
the automatic reset function. This parameter
is active when 14-20 Reset Mode is set to [1] -
[13] Automatic reset.