62
410
Function at Input Phase Loss
(MAINS FAILURE)
Value:
Trip (TRIP)
★
[0]
Autoderate & Warning (AUTODERATE & WARNING) [1]
Warning (WARNING)
[2]
Function:
This determines the action of the drive when one of the incoming power
phases is lost. Some action is required to control the level of ripple
voltage on the DC bus to avoid damage to the DC bus capacitors.
Description of choice:
At Trip, the drive stops the motor within a few seconds (depending on
drive size).
If Autoderate & Warning is selected, the drive will export a warning
and reduce the output current to 30% of maximum current
to maintain
operation.
CAUTION
!
If
Warning is selected, life expectancy of drive
will be reduced when input phase loss persists.
At Warning, only a warning will be exported when an input phase loss
occurs, but in severe cases, other extreme conditions might result in a
trip.
Drive display will show MAINS PHASE LOSS.
For drives with software version 2.0 or later, select Autoderate &
Warning. Set parameter 412, Trip Delay Overcurrent, to OFF.
CAUTION
!
At phase loss, the cooling fan of NEMA 12 drives
cannot be powered. To avoid overheating, ex-
ternal power supply can be connected. Contact
Danfoss Graham for further information.
411
Function at Drive Overtemperature
(FUNCT. OVERTEMP)
Value:
Trip (TRIP)
★
[0]
Autoderate & Warning (AUTODERATE & WARNING)
[1]
Function:
Select the function to be activated when the drive is exposed to an
overtemperature condition.
Description of choice:
At Trip, the drive stops the motor and exports an alarm.
At Autoderate & Warning, the drive first reduces the switching
frequency to minimize internal loss. If the overtemperature condition
persists, the drive reduces the output current until the heat sink
temperature stabalizes. A warning is issued when the function is active.
For drives with software version 2.0 or later, select Autoderate &
Warning. Set parameter 412, Trip Delay Overcurrent, to OFF.
412
Trip Delay Overcurrent
(OVERLOAD DELAY)
Value:
0 to 60 sec. (OFF)
★
60 sec.
Function:
When the output current has reached the current limit set in parameter
215, Current Limit, and remains there for the time selected in this
parameter, the drive will trip.
Description of choice:
Select how long the drive will run in current limit before it trips.
✭
Indicates default parameter. Depending upon the application, the drive may be delivered with other parameters selected.
