Protection and Features:
• 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.
Mains 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 Hz
Max. imbalance temporary between mains phases 3.0 % of rated supply voltage
True Power Factor () 0.9 nominal at rated load
Displacement Power Factor (cos) 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.
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 sym-
metrical Amperes, 240/480/600 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.
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 HVAC Drive's nominal torque.
Cable lengths and cross sections:
Max. motor cable length, screened/armoured VLT AQUA Drive: 150 m
Max. motor cable length, unscreened/unarmoured VLT AQUA Drive: 300 m
Max. cross section to motor, mains, load sharing and brake *
Maximum cross section to control terminals, rigid wire 1.5 mm
2
/16 AWG (2 x 0.75 mm
2
)
Maximum cross section to control terminals, flexible cable 1 mm
2
/18 AWG
Maximum cross section to control terminals, cable with enclosed core 0.5 mm
2
/20 AWG
Minimum cross section to control terminals 0.25 mm
2
* See Mains Supply tables for more information!
Digital inputs:
8. Specifications VLT
®
HVAC Drive Operating Instructions
134
MG.11.A4.02 - 09.10.06. VLT
®
is a registered Danfoss trademark
8
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