Schneider Electric Altivar 32 Manuel d'installation télécharger pdf (Page 29)

Installation

S1A28686 03/2010 29

Wiring recommendations

Power and circuit protection

The drive must be grounded to conform with the regulations concerning high leakage currents (over 3.5 mA).

Where local and national codes require upstream protection by means of a residual current device, use a type

A device for single-phase drives and a type B device for three-phase drives as defined in the IEC Standard

60755.

Choose a suitable model integrating:

z High frequency current filtering,

z A time delay that helps to prevent tripping caused by the load from stray capacitance on power-up.

The time delay is not possible for 30 mA devices; in this case, choose devices with immunity against nuisance

tripping.

If the installation includes several drives, provide one "residual current device" per drive.

Keep the power cables separate from circuits in the installation with low-level signals (detectors, PLCs,

measuring apparatus, video, telephone).

If you are using cables longer than 50 m (164 ft) between the drive and the motor, add output filters (for more

details please refer to the catalog).

Control

Keep the control circuits away from the power cables. For control and speed reference circuits, we recommend

using shielded twisted cables with a pitch of between 25 and 50 mm (1 and 2 in.), connecting the shielding to

ground at each end.

DANGER

HAZARD OF FIRE OR ELECTRIC SHOCK

z To avoid overheating or loss of contact, connections must be carried out according to the cable sizes and

tightening torques given in this document.

z The use of multi-wire cable without a lug is forbidden for the mains connection.

z On sizes A and B, the stripping length of the output power and braking resistor cables must be shorter than

10 mm (0.39 in.).

z Carry-out a pull out test to check that terminal screws are correctly tighten.

Failure to follow these instructions will result in death or serious injury.

Courtesy of Steven Engineering, Inc.-230 Ryan Way, South San Francisco, CA 94080-6370-Main Office: (650) 588-9200-Outside Local Area: (800) 258-9200-www.stevenengineering.com

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Schneider Electric Altivar 32 Manuel d'installation Page 29

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