Danfoss VLT Refrigeration Drive FC 103 Programming Manual page 56

Parameter Description
3.4.2 2-1* Brake Energy Funct.
Parameter group for selecting dynamic brake parameters.
Only valid for frequency converters with brake chopper.
2-10 Brake Function
3 3
Option:
[0] Off
[1] Resistor
brake
[2] AC brake
2-16 AC brake Max. Current
Range:
100 % [ 0 -
*
1000.0 %]
2-17 Over-voltage Control
Overvoltage control (OVC) reduces the risk of the frequency
converter tripping due to an overvoltage on the DC link caused
by generative power from the load.
Option:
[0] Disabled No OVC required.
[2] Enabled Activates OVC.
*
54
VLT
Function:
Available options depend on parameter 1-10 Motor
Construction:
[0] Asynchron:
•
[0] Off
•
[1] Resistor brake
•
[2] AC brake
[1] PM non-salient:
•
[0] Off
•
[1] Resistor brake
No brake resistor installed.
Brake resistor incorporated in the system for
dissipation of excess brake energy as heat.
Connecting a brake resistor allows a higher DC-
link voltage during braking (generating operation).
The resistor brake function is only active in
frequency converters with an integral dynamic
brake.
AC brake only works in compressor torque mode
in parameter 1-03 Torque Characteristics.
Function:
NOTICE
Parameter 2-16 AC brake Max.
Current has no effect when
parameter 1-10 Motor Construction =
[1] PM, non-salient SPM.
Enter the maximum permissible current
when using AC brake to avoid
overheating of motor windings.
Function:
NOTICE
The ramp time is automatically adjusted to
avoid tripping of the frequency converter.
Danfoss A/S © 05/2016 All rights reserved.
®
Refrigeration Drive FC 103
MG16H202