VLT® 4000 VT
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. VLT 4152-4202, 380-460 V
cuts out at 80°C and can be reset if the temperature has fallen below 60°C. VLT 4252-4352, 380-460
V cuts out at 105°C and can be reset if the temperature has fallen below 70°C.
•
The VLT AFD is protected against short-circuiting on motor terminals U, V, W.
•
The VLT AFD is protected against ground fault on motor terminals U, V, W.
•
Monitoring of the intermediate circuit voltage ensures that the VLT AFD cuts out if the
intermediate circuit volt-age gets too high or too low.
•
If a motor phase is missing, the VLT AFD cuts out.
•
If there is a line fault, the VLT AFD is able to carry out a controlled deramping.
•
If a line phase is missing, the VLT AFD will cut out when a load is placed on the motor.
MG.40.A4.22 - VLT is a registered Danfoss trademark
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