Danfoss VLT HVAC Drive Instruction Manual page 144

8. Specifications
Protection and Features:
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Line power supply (L1, L2, L3):
Supply voltage
8
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 no more than 100,000 RMS sym-
metrical Amperes, 240/500/600 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 the nominal torque for the VLT HVAC Drive.
144
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.).
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 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.11.A4.22 - VLT
VLT ®
3.0% of rated supply voltage
≥ 0.9 nominal at rated load
overvoltage category III/pollution degree 2
0 - 100% of supply voltage
maximum 110% for 1 min.
maximum 120% up to 0.5 sec.
maximum 110% for 1 min.
® is a registered Danfoss trademark
HVAC Drive Instruction Manual
200-240 V ±10%
380-480 V ±10%
525-600 V ±10%
50/60 Hz
(> 0.98)
maximum twice/min.
maximum once/min.
0 - 1000 Hz
Unlimited
1 - 3600 sec.
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