Danfoss FC 300 Design Manual page 218

FC 300 Design Guide
14-10 Mains Failure
Value:
No function
Controlled ramp-down
Controlled ramp-down, trip
Coasting
Kinetic back-up
Kinetic back-up, trip
Alarm
Function:
Function: Select the function to which the fre-
quency converter must act when the threshold in
par 14-11 has been reached.
Par 14-10 cannot be changed while motor is run-
ning.
Controlled ramp down:
The frequency converter will perform a controlled
ramp down. If Par 2-10 is [0] or AC brake [2] Off
the ramp will follow the Over Voltage Ramping. If
Par 2-10 is [1] Resistor Brake the ramp will follow
the setting in par 3-81 Quick Stop Ramp Time.
Controlled ramp-down [1]:
After power-up the frequency converter is ready
for start. Controlled ramp-down and trip [2]: After
power-up the frequency converter need a reset
for starting.
factory setting
218
How to Programme
[0]
[1]
[2]
[3]
[4]
[5]
[6]
() display text [] value for use in communication via serial communication port
MG.33.B7.02 - VLT is a registered Danfoss trademark
1. The power is back before the energy from
DC /moment of inertia from load is too
low. The frequency converter will perform
a controlled ramp down when par 14-11
level has been reached.
2. The frequency converter will perform a
controlled ramp down as long time energy
in the DC link is present. After this point
the motor will be coasted.
Kinetic back-up:
The frequency converter will perform a Kinetic
back-up. If par. 2-10 is [0] or AC brake [2] Off,
the ramp will follow the Over Voltage Ramping. If
par. 2-10 is [1] Resistor Brake the ramp will follow
the setting in par. 3-81 Quick stop ramp time.
Kinetic Back-up [4]: The frequency converter will
ride through on speed as long as the energy is
present from moment of inertia from the load.
Kinetic Back-up [5]: The frequency converter will
ride through on speed as long as the energy is
present from moment of inertia from the load. If
the DC voltage goes below par. 14-11 the fre-
quency converter will perform a trip.
14-11 Mains Voltage at Mains Fault
Value:
150 - 600 V
342 V