Danfoss VLT AQUA Drive Design Manual page 51

VLT ® AQUA Drive Design Guide
Protection and Features:
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Line power supply (L1, L2, L3):
Supply voltage
Supply voltage
Supply voltage
Supply frequency
Max. imbalance temporary between line phases
True Power Factor (λ)
Displacement Power Factor (cosφ) near unity
Switching on input supply L1, L2, L3 (power-ups) ≤ enclosure type A
Switching on input supply L1, L2, L3 (power-ups) ≥ enclosure type B, C
Environment according to EN60664-1
The unit is suitable for use on a circuit capable of delivering not more than 100,000 RMS sym-
metrical Amperes, 240/480 V maximum.
Motor output (U, V, W):
Output voltage
Output frequency
Switching on output
Ramp times
Torque characteristics:
Starting torque (Constant torque)
Starting torque
Overload torque (Constant torque)
*Percentage relates to VLT AQUA Drive's nominal torque.
Electronic thermal motor protection against overload.
Temperature monitoring of the heatsink ensures that the adjustable frequency drive trips
if the temperature reaches 203°F ± 9°F [95 °C ± 5°C]. An overload temperature cannot
be 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.).
The VLT AQUA Drive has an auto-derating function to prevent its 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 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.
MG.20.N2.22 - VLT ® is a registered Danfoss trademark.
3. VLT AQUA Selection
200-240 V ±10%
380-480 V ±10%
525-600 V ±10%
3.0% of rated supply voltage
≥ 0.9 nominal at rated load
maximum twice/min.
maximum once/min.
overvoltage category III/pollution degree 2
0 - 100% of supply voltage
maximum 110% for 1 min.
maximum 135% up to 0.5 sec.
maximum 110% for 1 min.
3
50/60 Hz
(> 0.98)
0 - 1000 Hz
Unlimited
1 - 3600 sec.
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