®
VLT
Automation Drive FC 300
Operating Instructions High Power
•
Temperature monitoring of the heatsink ensures that the frequency converter trips if the temperature reaches a predefined level. An overload
temperature cannot be reset until the temperature of the heatsink is below the values stated in the tables on the following pages (Guideline -
these temperatures may vary for different power sizes, enclosures etc.).
•
The frequency converter is protected against short-circuits on motor terminals U, V, W.
•
If a mains phase is missing, the frequency converter trips or issues a warning (depending on the load).
•
Monitoring of the intermediate circuit voltage ensures that the frequency converter trips if the intermediate circuit voltage is too low or too high.
•
The frequency converter constantly checks for critical levels of internal temperature, load current, high voltage on the intermediate circuit and
low motor speeds. As a response to a critical level, the frequency converter can adjust the switching frequency and/ or change the switching
pattern in order to ensure the performance of the drive.
MG.33.U2.02 - VLT
®
is a registered Danfoss trademark
5. General Specifications
113
5