Danfoss VLT Automation Drive FC 300 Instruction Manual page 115

VLT ® Automation Drive FC 300
Instruction Manual High Power
EMC standards, Immunity
See section on special conditions in the Design Guide
Protection and Features:
• Electronic thermal motor protection against overload.
• Temperature monitoring of the heatsink ensures that the adjustable frequency drive 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 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 (depending 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 constantly checks for critical internal temperature levels, load current, high voltage on the intermediate circuit
and low motor speeds. As a response to a critical level, the adjustable frequency drive can adjust the switching frequency and/ or change the
switching pattern in order to ensure the performance of the drive.
EN 61000-4-2, EN 61000-4-3, EN 61000-4-4, EN 61000-4-5, EN 61000-4-6
MG.33.U2.22 - VLT ® is a registered Danfoss trademark
5 General Specifications
EN 61800-3, EN 61000-6-1/2,
5
5-5