Schneider Altivar 71 VW3A7201 handleiding

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Schneider

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Handleiding

30 1757361 06/2012

Electromagnetic compatibility and wiring

Installation

To avoid coupling interference, the following cables must be at least 15 cm apart:

a) Network/power supply cables

b) Motor and drive cables

c) Control and data cables (low voltage range < 48 V)

To obtain a low impedance HF connection, the grounding cables, the shielding and other metal connections (for example: mounting plate/

mounted units) must be made using as large an area as possible with the metal conductive part. Use grounding cables and a grounding

network with as large a cross-section as possible (minimum 10 mm2) or metal strips.

Use shielded copper or tinned copper cables. Shielded steel cables are not suitable for high frequency applications. Connect the shielding

using metal clips or connectors to the grounding connections. Do not extend the shielding with a single wire!

If external EMC filters are used, they must be installed no more than 30 cm away from the noise source, and must have low impedance

connections and contacts.

Relays, magnetic contactors, etc, must always be fitted with varistors, RC circuits or diode filters.

All connections must be as short as possible and must be positioned as close as possible to the ground. Unconnected wires act like

antennae.

Avoid current loops in all cables. Connect unused cables to the ground at both ends.

If unshielded cables are used, twist the pairs to attenuate the non asymmetric noise.

Connection of an EMC filter

Connected protective cable

Busbar connected to the

mounting plate over a large area

Mounting plate

Ground attachment

Power supply cable

Connection of RFI filter to

mounting plate over a large area

Equalization of the potential

to the building ground

Filtered cable to drive

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