Danfoss VLT 5000 Series Instruction Manual page 15

VLT 5000 Series protection:
• Electronic motor thermal protection against overload.
• Temperature monitoring of heat-sink ensures that the drive cuts out if the temperature reaches 90°C for
Chassis and Nema 1. For NEMA 12 cut-out temperature is 80°C. An overtemperature can only be reset when
the temperature of the heat-sink has fallen below 60°C.
For the units mentioned below, the limits are as follows:
- VLT 5122, 380-500 V, cuts out at 75°C and can be reset if the temperature has fallen below 60°C.
- VLT 5152, 380-500 V, cuts out at 80°C and can be reset if the temperature has fallen below 60°C.
- VLT 5202, 380-500 V, cuts out at 95°C and can be reset if the temperature has fallen below 65°C.
- VLT 5252, 380-500 V, cuts out at 95°C and can be reset if the temperature has fallen below 65°C.
- VLT 5302, 380-500 V, cuts out at 105°C and can be reset if the temperature has fallen below 75°C.
- VLT 5352-5552, 380-500 V, cut out at 85°C and can be reset if the temperature has fallen below 60°C.
- VLT 5042-5122, 525-690 V, cut out at 75°C and can be reset if the temperature has fallen below 60°C.
- VLT 5152, 525-690 V, cuts out at 80°C and can be reset if the temperature has fallen below 60°C.
- VLT 5202-5352, 525-690 V, cut out at 100°C and can be reset if the temperature has fallen below 70°C.
- VLT 5402-5602, 525-690 V, cut out at 75°C and can be reset if the temperature has fallen below 60°C.
• The drive is protected against short-circuiting on motor terminals U, V, W.
• The drive is protected against earth fault on motor terminals U, V, W.
• Monitoring of the intermediate circuit voltage ensures that the drive cuts out if the intermediate circuit voltage
gets too high or too low.
• If a motor phase is missing, the drive cuts out, see parameter 234 Motor phase monitor.
• If there is a mains fault, the drive is able to carry out a controlled deramping.
• If a mains phase is missing, the drive will cut out when a load is placed on the motor.
12
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VLT 5000 Series
MG.51.C5.22 - VLT is a registered Danfoss trademark.