VLT
®
5000 Series
VLT 5000 Series protection:
• Electronic motor thermal protection against overload.
• Temperature monitoring of heat-sink ensures that the VLT frequency converter cuts out if the temperature
reaches 90
C for IP 00 and IP 20. For IP 54, the cut-out temperature is 80
C. An overtemperature can only
be reset when the temperature of the heat-sink has fallen below 60
C.
• The VLT frequency converter is protected against short-circuiting on motor terminals U, V, W.
• The VLT frequency converter is protected against earth fault on motor terminals U, V, W.
• Monitoring of the intermediate circuit voltage ensures that the VLT frequency converter cuts out if the inter-
mediate circuit voltage gets too high or too low.
• If a motor phase is missing, the VLT frequency converter cuts out, see parameter 234 Motor phase monitor.
• If there is a mains fault, the VLT frequency converter is able to carry out a controlled deramping.
• If a mains phase is missing, the VLT frequency converter will cut out when a load is placed on the motor.
MG.51.A1.02 - VLT is a registered Danfoss trade mark
13
Technical data
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