Danfoss VLT HVAC Drive Instruction Manual

Also see for VLT HVAC: Instructions Operating instructions Design guide Instruction Operating instructions

Protection and Features:• Electronic thermal motor protection against overload.• Temperature monitoring of the heatsink ensures that the adjustable frequency drive tripsif the temperature reaches 203°F ± 9°F [95 °C ± 5°C]. An overload temperature cannotbe 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 drivetrips 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.Line power supply (L1, L2, L3):Supply voltage 200-240 V ±10%Supply voltage 380-480 V ±10%Supply voltage 525-600 V ±10%Supply frequency 50/60 HzMax. imbalance temporary between line phases 3.0% of rated supply voltageTrue Power Factor (λ) ≥ 0.9 nominal at rated loadDisplacement Power Factor (cosφ) near unity (> 0.98)Switching on input supply L1, L2, L3 (power-ups) ≤ enclosure type A maximum twice/min.Switching on input supply L1, L2, L3 (power-ups) ≥ enclosure type B, C maximum once/min.Environment according to EN60664-1 overvoltage category III/pollution degree 2The unit is suitable for use on a circuit capable of delivering no more than 100,000 RMS sym-metrical Amperes, 240/500/600 V maximum.Motor output (U, V, W):Output voltage 0 - 100% of supply voltageOutput frequency 0 - 1000 HzSwitching on output UnlimitedRamp times 1 - 3600 sec.Torque characteristics:Starting torque (Constant torque) maximum 110% for 1 min.*Starting torque maximum 120% up to 0.5 sec.*Overload torque (Constant torque) maximum 110% for 1 min. **Percentage relates to the nominal torque for the VLT HVAC Drive.8. Specifications VLT® HVAC Drive Instruction Manual144 MG.11.A4.22 - VLT® is a registered Danfoss trademark8