2-03 DC Brake Cut-in Speed [RPM]
Range:
Function:
0 RPM*
[0 - par. 4-13 RPM]
Set the DC brake cut-in speed for activation of the DC braking current set in par.2-01
, upon a stop command.
3.4.2 2-1* Brake Energy Funct.
Parameter group for selecting dynamic braking parameters.
2-10 Brake Function
Option:
Function:
[0] *
Off
No brake resistor installed.
[1]
Resistor brake
Brake resistor incorporated in the system, for dissipation of surplus braking energy as heat. Con-
necting a brake resistor allows a higher DC link voltage during braking (generating operation). The
resistor brake function is only active in adjustable frequency drives with an integral dynamic brake.
[2]
AC brake
2-11 Brake Resistor (ohm)
Range:
Function:
50. Ohm* [5. - 32000. Ohm]
Set the brake resistor value in Ohms. This value is used for monitoring the power to the brake
resistor in par.2-13
. This parameter is only active in adjustable frequency
drives with an integral dynamic brake.
If the selection is xxxx use this parameter. If the selection is xxx.xx, use par. 3-81
Quick Stop Ramp
Time
.
2-12 Brake Power Limit (kW)
Range:
Function:
5.000 kW* [0.001 - 500.000 kW]
Set the monitoring limit of the braking energy transmitted to the resistor.
The monitoring limit is a product of the maximum duty cycle (120 sec.) and the maximum power
of the brake resistor at that duty cycle. See the formula below.
For 200–240 V units:
Presistor
= 390
2 ×
dutytime
R
× 120
For 380–480 V units
Presistor
= 778
2 ×
dutytime
R
× 120
For 380–500 V units
Presistor
= 810
2 ×
dutytime
R
× 120
For 575–600 V units
Presistor
= 943
2 ×
dutytime
R
× 120
This parameter is only active in adjustable frequency drives with an integral dynamic brake.
VLT
®
HVAC Drive Programming Guide
3 Parameter Description
MG.11.C6.22 - VLT
®
is a registered Danfoss trademark
3-31
3