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 tem-
perature 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 AQUA 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 voltage
525-690 V ±10%
Mains voltage low / mains drop-out:
During low mains voltage or a mains drop-out, the FC continues until the intermediate circuit voltage drops below the minimum stop level, which
corresponds typically to 15% below the FC's lowest rated supply voltage. Power-up and full torque cannot be expected at mains voltage lower than
10% below the FC's lowest rated supply voltage.
Supply frequency
50/60 Hz +4/-6%
The frequency converter power supply is tested in accordance with IEC61000-4-28, 50 Hz +4/-6%.
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.
Switching on input supply L1, L2, L3 (power-ups)
≥
enclosure type D, E, F
maximum 1 time/2 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 symmetrical Amperes, 240/480 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.
*
Dependent on power size.
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 AQUA 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!
Control card, RS-485 serial communication:
Terminal number
68 (P,TX+, RX+), 69 (N,TX-, RX-)
Terminal number 61
Common for terminals 68 and 69
The RS-485 serial communication circuit is functionally separated from other central circuits and galvanically isolated from the supply voltage (PELV).
3 VLT AQUA Selection
VLT
®
AQUA Drive Design Guide
50
MG.20.N5.02 - VLT
®
is a registered Danfoss trademark
3
