Altivar 31 - Square D

Altivar ® 31 Adjustable Speed AC Drives
Wiring
Electromagnetic compatibility
Schemes
EMC (RFI) input filters VW3A3140
Three-phase power supply Single-phase power supply
562995.eps
Installation recommendations for meeting EN 55011 Class A
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Ensure that the grounds of the drive controller, the motor, and the cable shields are at equal potential.
Use shielded cables with the shields connected to ground at both ends of the motor cable, control
cables, and the braking resistor (if used). Conduit can be used for part of the shielding length,
provided that there is no break in continuity.
Ensure maximum separation between the power supply cable (line supply) and the motor cable.
For additional information, refer to “Installation Recommendations for Meeting EN 55011 Class A” in the
Altivar ® 31 Installation Manual, bulletin number VVDED303041US.
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VW3 A3140
ATV 31
1. EMC plate supplied with the drive controller.
2. ATV31 drive controller.
3. Non-shielded power supply wires or cables.
4. Non-shielded wires for the output of the safety relay contacts.
5. Stainless steel clamps required to securely attach the shields for cables 6, 7, and 8 to the EMC plate.
6. Shielded cable for connection to the motor, with shield connected to ground at both ends. This shield must not be interrupted.
If using intermediate terminal blocks, they must be in EMC-shielded metal boxes.
7. Shielded cable for connection to control/command devices. For applications requiring a large number of conductors, small crosssections
must be used (20 AWG/0.5 mm 2 ). This shield must not be interrupted. If using intermediate terminal blocks, they must
be in EMC-shielded metal boxes.
8. Shielded cable for connecting the braking resistor, if used. The shield must be unbroken, and connected to ground at both ends.
If using intermediate terminals, they must be in EMC-shielded metal boxes.
© 2004–2005 Schneider Electric All Rights Reserved
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VW3 A3140
Frame sizes 1 to 7 Frame size 8 Frame size 9
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ATV 31
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4/2005