Current Limit 2-57
4. Overload Protection I
2
T - This is a software feature that monitors the
output current over time and integrates per IT. The base protection is
110% for 1 minute or the equivalent I
2
T value (i.e. 150% for 3 seconds,
etc.). If the IT integrates to maximum, an F64 “Drive Overload” fault
will occur. The approximate integrated value can be monitored via the
[Drive OL Count] parameter.
5. Heatsink Temperature Protection - The drive constantly monitors the
heatsink temperature. If the temperature exceeds the drive maximum, a
“Heatsink OvrTemp” fault will occur. The value is fixed by hardware at a
nominal value of 100 degrees C. This fault is generally not used for
overcurrent protection due to the thermal time constant of the heatsink. It
is an overload protection.
6. Thermal manager (see Drive Overload
on page 2-86).
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