Motor Cables - Danfoss VLT AutomationDrive FC 300 Design Manual

FC 300 Design Guide
No. 96
U
U1
W2
U1
No. 99
PE

Motor Cables

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See section General Specifications for correct dimensioning of motor cable cross-section and length.
Use a screened/armoured motor cable to comply with EMC emission specifications
•
unless otherwise stated for the RFI filter used.
Keep the motor cable as short as possible to reduce the noise level and leakage currents.
•
Connect the motor cable screen to the decoupling plate of the FC 300 and to the metal cabinet of the motor.
•
Make the screen connections with the largest possible surface area (cable clamp). This is
•
done by using the supplied installation devices in the FC 300.
• Avoid mounting with twisted screen ends (pigtails), which will spoil high frequency screening effects.
If it is necessary to split the screen to install a motor isolator or motor relay, the screen
•
must be continued with the lowest possible HF impedance.
How to Install
97 98 Motor voltage 0-100%
V W of mains voltage.
3 wires out of motor
V1 W1
6 wires out of motor, Delta-connected
U2 V2
V1 W1 6 wires out of motor, Star-connected
U2, V2, W2 to be interconnected separately
(optional terminal block)
Earth connection
MG.33.B4.02 - VLT is a registered Danfoss trademark
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