Danfoss VLT AutomationDrive FC 360 Programming Manual page 77

Programming Guide | VLT® AutomationDrive FC 360
Data type:
Uint16
This parameter is used to set AC brake power capability (set ramp-down time when inertia is constant). In cases where the DC-link
voltage is not higher than the DC-link voltage trip value, the generator torque can be adjusted with this parameter. The higher the AC
brake gain is, the stronger the brake capability is. Selecting 1.0 means that there is no AC brake capability.
If there is continuous generator torque, higher generator torque causes higher motor current, and the motor becomes hot. In this
condition, parameter 2-16 AC Brake, Max current can be used to protect the motor from overheating.
1-9* Motor Temperature
4.2.10
Parameters for adjusting temperature protection settings for the motor.
1-90 Motor Thermal Protection
Default value:
[0] No protection
Setup:
All setups
Data type:
Uint8
Motor thermal protection can be implemented via a PTC sensor in the motor windings connected to 1 of the analog or digital inputs
(parameter 1-93 Thermistor Source), or via calculation (ETR = Electronic Thermal Relay) of the thermal load, based on the actual load
and time. The calculated thermal load is compared with the rated motor current I
activate an overheat warning or alarm.
Option
[0]
[1]
[2]
[3]
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Change during operation:
NOTICE
Parameter type:
Conversion index:
Change during operation:
Name
No protection
Thermistor warning
Thermistor trip
ETR warning 1
True
Option
–
True
and the rated motor frequency f
M,N
Description
Continuously overloaded motor, when no
warning or trip of the drive is required.
Activate a warning when the connected
thermistor in the motor reacts to a motor
overtemperature.
Stop (trip) the drive when the connected
thermistor in the motor reacts to a motor
overtemperature. The thermistor cut
out value must be > 3 kΩ. Integrate a
thermistor (PTC sensor) in the motor for
winding protection.
Calculates the load and activates a
warning in the display when the motor is
overloaded. Program a warning signal via
1 of the digital outputs.
AU275649936274en-001401 / 130R0507 |
. It is possible to
M, N
75