Name: Danfoss VLT AutomationDrive FC 360
Brand: Danfoss
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Programming Guide | VLT® AutomationDrive FC 360

Data type: Uint32 Change during operation: True

Parameter 2-12 Brake Power Limit (kW)is the expected average power dissipated in the brake resistor over a period of 120 s. It is used as

the monitoring limit for parameter 16-33 Brake Energy Average and specifies when a warning/alarm is given. To calculate parameter 2-12

Brake Power Limit (kW), the following formula can be used.

br,avg

is the average power dissipated in the brake resistor. R

is the resistance of the brake resistor. t

is the active breaking time within

the 120 s period T

. U

is the DC voltage where the brake resistor is active. For T4 units, the DC voltage is 770 V, which can be reduced by

parameter 2-14 Brake voltage reduce.

 NOTICE

If R

is not known or if T

is different from 120 s, the practical approach is to run the brake application, read out parameter 16-33

Brake Energy Average, and then enter this value + 20% in parameter 2-12 Brake Power Limit (kW).

2-14 Brake Voltage Reduce

Default value: 0 V Parameter type: Range (0–500 V)

Setup: All setups Conversion index: 0

Data type: Uint16 Change during operation: True

Setting this parameter may change the brake resistor (parameter 2-11 Brake Resistor (ohm)).

This parameter can reduce the DC voltage where the brake resistor is active.

2-16 AC Brake, Max Current

Default value: 100% Parameter type: Range (0–160%)

Setup: All setups Conversion index: 0

Data type: Uint16 Change during operation: True

Enter the maximum allowed current when using AC brake to avoid overheating of motor windings.

 NOTICE

Parameter 2-16 AC Brake, Max Current is only available for asynchronous motors.

2-17 Over-voltage Control

Default value: [0] Disabled Parameter type: Option

Setup: All setups Conversion index: –

Data type: Uint8 Change during operation: True

Overvoltage control (OVC) reduces the risk of the drive tripping due to an overvoltage on the DC link caused by generative power from

the load.

Danfoss VLT AutomationDrive FC 360 Programming Guide

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