Danfoss FC 100 Instruction Manual page 124

5. General Specifications
Protection and Features:
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Electronic thermal motor protection against overload.
Temperature monitoring of the heatsink ensures that the adjustable frequency drive trips
if the temperature reaches 203° F ± 9° F [95° C ± 5° C]. An overload temperature cannot
be reset until the temperature of the heatsink is below 158° C ± 9° C [70° C ± 5° C]
(Guideline - these temperatures may vary for different power sizes, enclosures, etc.).
VLT HVAC drive has an auto-derating function to prevent it's heatsink from reaching 203°
F [95° C].
The adjustable frequency drive is protected against short-circuits on motor terminals U,
V, W.
If a line phase is missing, the adjustable frequency drive trips or issues a warning (de-
pending on the load).
Monitoring of the intermediate circuit voltage ensures that the adjustable frequency drive
trips if the intermediate circuit voltage is too low or too high.
The adjustable frequency drive is protected against ground faults on motor terminals U,
V, W.
MG.11.F1.22 - VLT ® is a registered Danfoss trademark.
VLT ® HVAC DRIVE High Power
Instruction Manual