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: Function:
10.0s.
*
[0.0 - 60.0 s.]
Set the duration of the DC braking current set in par. 2-01, once activated.
2-03 DC Brake Cut In Speed
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 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.
2-11 Brake Resistor (ohm)
Range: Function:
Size related [Ohm] Set the brake resistor value in Ohms. This value is used for monitoring the power to the brake resistor in par.
2-13
Brake Power Monitoring
. 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.
2-12 Brake Power Limit(kW)
Range: Function:
kW
*
[0.001 - Variable Limit kW]
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:
P
resistor
=
390
2
×
dutytime
R
× 120
For 380 - 480 V units:
P
resistor
=
778
2
×
dutytime
R
× 120
For 525 - 600 V units:
P
resistor
=
943
2
×
dutytime
R
× 120
This parameter is only active in frequency converters with an integral dynamic brake.
VLT
®
HVAC Drive Programming Guide 3. Parameter Description
MG.11.C5.02 - VLT
®
is a registered Danfoss trademark
51
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