Danfoss VLT FC 100 Series Programming Manual page 51

®
VLT HVAC Drive Programming Guide
NB!
The maximum value depends on the rated motor current.
NB!
Avoid 100 % current for too long. It may damage the motor.
2-02 DC Braking Time
Range:
*
10.0s. [0.0 - 60.0 s.]
2-03 DC Brake Cut In Speed
Range:
*
0 RPM [0 - par. 4-13 RPM]
3.4.2. 2-1* Brake Energy Funct.
Parameter group for selecting dynamic braking parameters.
2-10 Brake Function
Option:
*
Off
[0]
[1] Resistor brake
2-11 Brake Resistor (ohm)
Range:
Size related [Ohm]
2-12 Brake Power Limit(kW)
Range:
*
kW [0.001 - Variable Limit kW]
This parameter is only active in frequency converters with an integral dynamic brake.
Function:
Set the duration of the DC braking current set in par. 2-01, once activated.
Function:
Set the DC brake cut-in speed for activation of the DC braking current set in par. 2-01, upon a stop command.
Function:
No brake resistor installed.
Brake resistor incorporated in the system, for dissipation of surplus 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.
Function:
Set the brake resistor value in Ohms. This value is used for monitoring the power to the brake resistor in par.
Brake Power Monitoring
2-13 . This parameter is only active in frequency converters with an integral dynamic
brake.
If the selection is xxxx use this parameter. If the selection is xxx.xx, use par. 3-81.
Function:
Set the monitoring limit of the brake power 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:
2
390 × dutytime
P resistor
=
R
× 120
For 380 - 480 V units:
2
dutytime
778 ×
P resistor
=
R
× 120
For 525 - 600 V units:
943 2 ×
dutytime
P resistor
=
R
× 120
MG.11.C5.02 - VLT ® is a registered Danfoss trademark
3. Parameter Description
51
3