variable speed drives
Additional EMC input filters VW3A3140 p
Single-phase power supply Three-phase power supply
Connections ensuring conformity to EMC standards
Principle Grounds between the drive, motor and cable shielding must have "high-frequency" equipotentiality. Use shielded cables with the shielding connected to ground throughout 360 at both ends for the motor cable, the braking resistor cable and the control-signal cables. Metal conduit or ducting can be used for part of the shielding length provided that there is no break in the continuity of the ground connection. Ensure maximum separation between the power supply cable and the motor cable. Installation diagram 1 Steel plate to be mounted on the drive (earthed casing) 2 Altivar 312 drive 3 Unshielded power supply wires or cable 4 Unshielded wires or cable for the output of the detected fault relay contacts 5 Attach and ground the shielding of cables 6 , 7 and 8 as close as possible to the drive: - Strip the cable to expose the shielding - Attach the cable to the plate 1 , attaching the clamp on the stripped part of the shielding. The shielding must be clamped tightly enough to the metal sheet to ensure good contact. For cables 6 , 7 and 8 , the shielding must be connected to ground at both ends. The shielding must be continuous, and if intermediate terminals are used, they must be placed in EMC shielded metal boxes. 6 Shielded cable for connecting the motor 7 Shielded cable for connecting the control-signal wiring. For applications requiring several conductors, use cables with a small cross-section (0.5 mm
). 8 Shielded cable for connecting the braking resistor 9 PE cable (green-yellow)
Note: The HF equipotential ground connection between the drive, motor and cable shielding does not remove the need to connect the PE conductors (green-yellow) to the appropriate terminals on each device. If using an additional EMC input filter, it must be mounted under the drive and connected directly to the line supply via an unshielded cable. Link 3 on the drive is then via the filter output cable.
Operation on an IT system (isolated or impedance grounded neutral) Use a permanent insulation monitor compatible with non-linear loads, such as the Schneider Electric XM200 (please consult our website www.schneider-electric.com or contact your Customer Care Center). ATV312H ppp M2 and ATV312H ppp N4 drives have integrated EMC filters. For use on an IT system, these filters can be disconnected by removing their ground connection: For ATV312H018M2HU22M2 and H037N4HU40N4 drives, remove a jumper to disconnect the filter. For ATV312HU55N4HD15N4 drives, move the wire with the cable tag to disconnect the filter.
L'1 L'2 L'3 L1 L2 L3 L1 L2 L3
ATV A31 40 p ATV 312H ppp M3 ATV 312H ppp N4 ATV 312H ppp S6
L'1 L'2 L1 L2 L1 L2
ATV A31 40 p ATV 312H ppp M2
2 5 7 4 6 8 3 9 1
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