General Specifications - Danfoss VLT Series Design Manual

3. VLT HVAC Selection

3.2. General Specifications

Protection and Features:
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Mains supply (L1, L2, L3):
Supply voltage
Supply voltage
Supply voltage
Supply frequency
Max. imbalance temporary between mains 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, 240/480/600 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 VLT HVAC Drive's nominal torque.
Cable lengths and cross sections:
Max. motor cable length, screened/armoured
Max. motor cable length, unscreened/unarmoured
Max. cross section to motor, mains, load sharing and brake *
Maximum cross section to control terminals, rigid wire
Maximum cross section to control terminals, flexible cable
Maximum cross section to control terminals, cable with enclosed core
Minimum cross section to control terminals
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Electronic thermal motor protection against overload.
Temperature monitoring of the heatsink ensures that the frequency converter trips if the
temperature reaches 95 °C ± 5°C. An overload temperature cannot be reset until the
temperature of the heatsink is below 70 °C ± 5°C (Guideline - these temperatures may
vary for different power sizes, enclosures etc.). VLT HVAC Drive has an auto derating
function to avoid it's heatsink reaching 95 deg C.
The frequency converter is protected against short-circuits on motor terminals U, V, W.
If a mains phase is missing, the frequency converter trips or issues a warning (depending
on the load).
Monitoring of the intermediate circuit voltage ensures that the frequency converter trips
if the intermediate circuit voltage is too low or too high.
The frequency converter is protected against earth faults on motor terminals U, V, W.
MG.11.B2.02 - 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 135% up to 0.5 sec.
maximum 110% for 1 min.
VLT HVAC Drive: 150 m
VLT HVAC Drive: 300 m
1.5 mm 2 /16 AWG (2 x 0.75 mm
®
is a registered Danfoss trademark
®
VLT HVAC Drive Design Guide
200-240 V ±10%
380-480 V ±10%
525-600 V ±10%
50/60 Hz
(> 0.98)
maximum 2 times/min.
maximum 1 time/min.
0 - 1000 Hz
Unlimited
1 - 3600 sec.
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2 )
2
1 mm /18 AWG
2
0.5 mm /20 AWG
0.25 mm 2