VLT
®
4000 VT
Max. DC-bus cable length, shielded cable ..................................................................... 25 m from AFD to DC bar.
Max. loadsharing cable length, screened cable .....................................
25 m from frequency converter to DC bar.
Max. cable cross-section to motor, see next section
Max. cross-section for control cables ........................................................................................ 1.5 mm
2
/16 AWG
Max. cross-section for serial communication ............................................................................. 1.5 mm
2
/16 AWG
Control characteristics:
Frequency range .................................................................................................................................. 0 - 1000 Hz
Resolution on output frequency ............................................................................................................. ±0.003 Hz
System response time ............................................................................................................................... 3 msec.
Speed, control range (open loop) ..................................................................................... 1:100 of synchro. speed
Speed, control range (closed loop) ................................................................................. 1:1000 of synchro. speed
Speed, accuracy (open loop) .............................................................................. < 1500 rpm:max. error ± 7.5 rpm
> 1500 rpm: max. error of 0.5% of actual speed
Process, accuracy (closed loop) ......................................................................... < 1500 rpm: max.error ± 1.5 rpm
> 1500 rpm: max. error of 0.1% of actual speed
All control characteristics are based on a 4-pole asynchronous motor
Accuracy of display readout (parameters 009-012
Display readout
):
Motor current, 0 - 140% load ................................................................. Max. error: ±2.0% of rated output current
Power kW, Power HP, 0 - 90% load ........................................................ Max. error: ±5.0% of rated output power
Externals:
Enclosure .................................................................................................................... Chassis, NEMA 1, NEMA 12
Vibration test .................................. 0.7 g RMS 18-1000 Hz random. 3 directions for 2 hours (IEC 68-2-34/35/36)
Max. relative humidity ............................................................. 93 % +2 %, -3 % (IEC 68-2-3) for storage/transport
Max. relative humidity ................................................ 95% non condensing (IEC 721-3-3; class 3K3) for operation
Ambient temperature Chassis/NEMA 1/NEMA 12 ................................... Max. 45°C (24-hour average max. 40°C)
Ambient temperature NEMA 1/NEMA 12 VLT 4011 460 V .....................
Max. 40°C (24-hour average max. 35°C)
see Derating for high ambient temperature
Min. ambient temperature in full operation ........................................................................................................ 0°C
Min. ambient temperature at reduced performance .....................................................................................
-10°C
Temperature during storage/transport ............................................................................................. -25 - +65/70°C
Max. altitude above sea level ................................................................................................................... 3300 feet
see Derating for high air pressure
VLT 4000 VTprotection:
•
Electronic motor thermal protection against overload.
•
Temperature monitoring of heat-sink ensures that the VLT AFD cuts out if the temperature reaches 90°C
for Chassis and NEMA 1. For NEMA 12, the cut-out temperature is 80°C. An overtemperature can only
be reset when the temperature of the heat-sink has fallen below 60°C.
MG.40.A7.22 - VLT is a registered Danfoss trademark
16
