Danfoss VLT FCD 311 Design Manual page 133

When complying with EN 55011 1A the motor cable length must in certain instances be reduced. See
EMC emission.
Control characteristics:
Frequency range .......................................................................................................... 0.2 - 132 Hz, 1 - 1000 Hz
Resolution of output frequency ...................................................................................... 0.013 Hz, 0.2 - 1000 Hz
Repeat accuracy of Precise start/stop(terminals 18, 19) ................................................................ ≤ ± 0.5 msec
System response time (terminals 18, 19, 27, 29, 33) ....................................................................... ≤ 26.6 msec
Speed control range (open loop) ............................................................................... 1:15 of synchronous speed
Speed control range (closed loop) .......................................................................... 1:120 of synchronous speed
Speed accuracy (open loop) .................................................................... 90 - 3600 rpm: Max. error of ±23 rpm
Speed accuracy (closed loop) ................................................................ 30 - 3600 rpm: Max. error of ±7.5 rpm
All control characteristics are based on a 4-pole asynchronous motor
Surroundings:
Enclosure ....................................................................................................................... IP 66, NEMA 4x (indoor)
Vibration test ................................................................................................................................................. 1.0 g
Max. relative humidity ................................................................................................ 5% - 85% during operation
Ambient temperature IP66 ................................................................ Max. 40
Derating for ambient temperature, see special conditions in the Design Guide
Min. ambient temperature during full-scale operation ................................................................................... 0
Min. ambient temperature at reduced performance .................................................................................. - 10
Temperature during storage/transport .......................................................................................... -25 - +65/70
Max. altitude above sea level ................................................................................................................... 1000 m
Derating for air pressure, see special conditions in the Design Guide
EMC standards used, Emission .............................................................. EN 50081-1/2, EN 61800-3, EN 55011
EMC standards used, immunity ..... EN 50082-2, EN 61000-4-2, EN 61000-4-3, EN 61000-4-4, EN 61000-4-5,
See section on special conditions in the Design Guide
Safeguards:
• Electronic thermal motor protection against overload.
• Temperature monitoring of the power module ensures that the frequency converter cuts out if the tempera-

ture reaches 100 C. An overload temperature cannot be reset until the temperature of the power module is
below

70 C.
• The frequency converter is protected against short-circuits on motor terminals U, V, W.
• If a mains phase is missing, the frequency converter will cut out.
• Monitoring of the intermediate circuit voltage ensures that the frequency converter cuts out if the intermedi-
ate circuit voltage is too low or too high.
• The frequency converter is protected against earth fault on motor terminals U, V, W.
MG.04.A1.02 - VLT is a registered Danfoss trade mark
®
VLT FCD Series

C (24-hour average max. 35

C)

C

C

C
EN 61000-4-6
133