Danfoss VLT AutomationDrive FC 300 Design Manual page 115

FC 300 Design Guide
Cable-length and cross-section:
The frequency converter has been EMC tested with a given length of cable. Keep the motor cable as short as possible to reduce the noise level and
leakage currents.
Switching frequency:
When frequency converters are used together with Sine-wave filters to reduce the acoustic noise from a motor, the switching frequency must be set
according to the instruction in Par. 14-01.
Term. no. 96
U
U1
W2
U1
1)
Protected Earth Connection
Illustration 6.37: Compact IP 00 (Chassis), enclosure D3
97 98 99
V W Motor voltage 0-100% of mains voltage.
PE 1)
3 wires out of motor
V1 W1 Delta-connected
PE 1)
U2 V2 6 wires out of motor
V1 W1 Star-connected U2, V2, W2
PE 1)
U2, V2 and W2 to be interconnected separately.
MG.33.BA.02 - VLT ® is a registered Danfoss trademark
NB!
In motors without phase insulation paper or other in-
sulation reinforcement suitable for operation with volt-
age supply (such as a frequency converter), fit a Sine-
wave filter on the output of the frequency converter.
Illustration 6.38: Compact IP 21 (NEMA 1) and IP 54 (NEMA
12), enclosure D1
6. How to Install
6
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