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 203°F ± 41°F [95°C ±
5°C]. An overload temperature cannot be reset until the temperature of the heatsink is below 158°F ± 9°F [70°C ± 5°C] (Guideline - these
temperatures may vary for different power sizes, enclosures etc.). VLT AQUA Drive has an auto derating function to avoid it's heatsink 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 (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 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 voltage 525–690 V ±10%
AC line voltage low / line drop-out:
During low AC line voltage or a line drop-out, the adjustable frequency drive continues until the intermediate circuit voltage drops below the minimum
stop level, which corresponds typically to 15% below the adjustable frequency drive's lowest rated supply voltage. Power-up and full torque cannot be
expected at AC line voltage lower than 10% below the adjustable frequency drive's lowest rated supply voltage.
Supply frequency 50/60 Hz +4/-6%
The adjustable frequency drive power supply is tested in accordance with IEC61000-4-28, 50 Hz +4/-6%.
Max. imbalance temporary between line phases 3.0% of rated supply voltage
True Power Factor (λ) ≥ 0.9 nominal at rated load
Displacement Power Factor (cosφ) near unity (> 0.98)
Switching on input supply L1, L2, L3 (power-ups) ≤ enclosure type A maximum 2 times/min.
Switching on input supply L1, L2, L3 (power-ups) ≥ enclosure type B, C maximum 1 time/min.
Switching on input supply L1, L2, L3 (power-ups) ≥ enclosure type D, E, F maximum 1 time/2 min.
Environment according to EN60664-1 overvoltage category III/pollution degree 2
The unit is suitable for use on a circuit capable of delivering not more than 100.000 RMS symmetrical Amperes, 240/480 V maximum.
Motor output (U, V, W):
Output voltage 0–100% of supply voltage
Output frequency 0–1000 Hz
*
Switching on output Unlimited
Ramp times 1–3600 sec.
*
Dependent on power size.
Torque characteristics:
Starting torque (Constant torque) maximum 110% for 1 min.
*
Starting torque maximum 135% up to 0.5 sec.
*
Overload torque (Constant torque) maximum 110% for 1 min.
*
*Percentage relates to VLT AQUA Drive's nominal torque.
3 VLT AQUA Selection VLT
®
AQUA Drive Design Guide
3-14
MG.20.N5.22 - VLT
®
is a registered Danfoss trademark
3
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