Danfoss VLT FC 102 Programming Manual page 121

Programming Guide | VLT® HVAC Drive FC 102
T7 units: 1099 V
l
If R is not known, or if T
br br
Brake Energy Average and then enter this + 20% in parameter 2-12 Brake Power Limit (kW).
2-13 Brake Power Monitoring
Default value: [0] Off
Setup: All setups
Data type: Uint8
This parameter is only active in drives with a brake. This parameter enables monitoring of the power to the brake resistor. The power
is calculated based on the resistance (parameter 2-11 Brake Resistor (ohm)), the DC-link voltage, and the resistor duty time. If power
monitoring is set to [0] Off or [1] Warning, the brake function remains active, even if the monitoring limit is exceeded. This may lead to
thermal overload of the resistor. It is also possible to generate a warning via a relay/digital output. The measuring accuracy of the power
monitoring depends on the accuracy of the resistance of the resistor (better than ±20%).
Option Name
[0]* Off
[1] Warning 120s
[2] Trip 120s
[3] Warning & Trip 120s
[4] Warning 30s
[5] Trip 30s
[6] Warning & trip 30s
[7] Warning 60s
[8] Trip 60s
[9] Warning & trip 60s
© 2024.10
is different from 120 s, the practical approach is to run the brake application, read parameter 16-33
NOTICE
Parameter type:
Conversion index:
Change during operation:
Description
No brake power monitoring required.
Activates a warning on the display when the power transmitted
during the duty time exceeds 100% of the monitoring limit
(parameter 2-12 Brake Power Limit (kW)). The warning
disappears when the transmitted power drops below 80% of the
monitoring limit.
Trips the drive and shows an alarm when the calculated power
exceeds 100% of the monitoring limit.
Activates both of the above, including warning and alarm.
Activates a warning on the display when the power transmitted
during the duty time exceeds 100% of the monitoring limit
(parameter 2-12 Brake Power Limit (kW)). The warning
disappears when the transmitted power drops below 80% of the
monitoring limit.
Trips the drive and shows an alarm when the calculated power
exceeds 100% of the monitoring limit.
Activates both of the above, including warning and alarm.
Activates a warning on the display when the power transmitted
during the duty time exceeds 100% of the monitoring limit
(parameter 2-12 Brake Power Limit (kW)). The warning
disappears when the transmitted power drops below 80% of the
monitoring limit.
Trips the drive and shows an alarm when the calculated power
exceeds 100% of the monitoring limit.
Activates both of the above, including warning and alarm.
Parameter Descriptions
Option
–
True
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