3.2. General Specifications
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 (
λ
)
≥
0.9 nominal at rated load
Displacement Power Factor (cos
φ
) 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 HVAC Drive: 150 m
Max. motor cable length, unscreened/unarmoured
VLT HVAC 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
3. VLT HVAC Selection
VLT
®
HVAC Drive Design Guide
54
MG.11.B2.02 - VLT
®
is a registered Danfoss trademark
3
Содержание VLT series
Страница 78: ...4 How to Order VLT HVAC Drive Design Guide 78 MG 11 B2 02 VLT is a registered Danfoss trademark 4...
Страница 120: ...7 RS 485 Installation and Set up VLT HVAC Drive Design Guide 120 MG 11 B2 02 VLT is a registered Danfoss trademark 7...
Страница 152: ...8 Troubleshooting VLT HVAC Drive Design Guide 152 MG 11 B2 02 VLT is a registered Danfoss trademark 8...