Danfoss VLT Automation VT Drive FC 322 Programming Manual page 55

VLT Automation VT Drive FC322
Programming Guide
2.4.2 2-1* Brake Energy Funct.
Parameter group for selecting dynamic braking parameters.
2-10 Brake Function
Option:
[0] * Off
[1] Resistor brake
[2] AC brake
2-11 Brake Resistor (ohm)
Range:
Application [Application dependant]
dependent*
2-12 Brake Power Limit (kW)
Range:
Application [Application dependant]
dependent*
This parameter is only active in frequency converters with an integral dynamic brake.
2-13 Brake Power Monitoring
Option:
[0] * Off
[1] Warning
[2] Trip
[3] Warning and trip
If power monitoring is set to
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
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Function:
No brake resistor installed.
Brake resistor incorporated in the system, for dissipation of surplus brake energy as heat. Connect-
ing 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:
Function:
Function:
This parameter is only active in frequency converters with an integral dynamic brake.
This parameter enables monitoring of the power to the brake resistor. The power is calculated on
the basis of the resistance (par. 2-11
duty time.
No brake power monitoring is required.
Activates a warning on the display when the power transmitted over 120 s exceeds 100% of the
monitoring limit (par. 2-12
The warning disappears when the transmitted power falls below 80% of the monitoring limit.
Trips the frequency converter and displays an alarm when the calculated power exceeds 100% of
the monitoring limit.
Activates both of the above, including warning, trip and alarm.
Off [0] or Warning [1], the brake function remains active even if the monitoring limit is exceeded. This may lead to thermal
20%).
MG.20.W1.22 - VLT is a registered Danfoss trademark
Brake Resistor (ohm) , the DC link voltage, and the resistor
Brake Power Limit (kW)
).
2 Parameter Description
2
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