Schneider Altivar 71 VW3A7201 handleiding

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Handleiding

1757361 06/2012 29

Electromagnetic compatibility and wiring

To install a braking unit in an EC approved control system, the following measures and warnings must be taken into account:

Braking units are electrical units for use in industrial and commercial equipment. In accordance with the EMC directive, 2004/108/EC, it is

not compulsory to mark these braking units, although in the sense of the directive and the EMC law these components are designed for

installation by an electromechanical engineer and cannot be used autonomously. Compliance with the protection objectives of the EMC

directive must be proved by the installer or the user of the machine or the equipment. If EMC filters provided by Schneider-Electric are used,

and if the conditions below and the installation directives are followed, then the compliance of the measures is assured.

Conditions

The braking unit, combined with the connected EMC filters, has been designed for use under the conditions defined by class "A" ("B" on

request).

Definition conforming to the basic standards:

• EN50081-2 for emission

• EN50082-2 for immunity

General • The user is responsible for compliance of the application with EC directives.

Assembly

• Connect the braking unit and the EMC filter to the grounded mounting plate with a cable whose cross-section is as

large as possible:

- Mounting plates with conductive surfaces (coated zinc or stainless steel) provide a permanent contact.

- Varnished cards must not be used for installations that are to comply with EMC standards.

• If you use several mounting plates:

- Connect as large an area as possible of the mounting plate (for example with copper strips).

• Check that the power supply cables and control cables are separated.

Filters

• Use the EMC filters that are assigned to the braking unit. EMC filters reduce high frequency interference from a

prohibited value to a permitted value.

Shielding

• Metal cable connectors provide a connection between the shielding and the unit over a large area.

• If there are breaks in the shielding at all the ends in the cable route:

- Connect the cable shielding to the mounting plate over a large area

• If the power supply cables between the EMC filter and the braking unit are longer than 300 mm:

- Use shielded power supply cables

- Connect the shielding directly to the drive/braking unit mounting plate and to the EMC filter mounting plate.

• Shield the control cables:

- Connect the shielding to their terminals via the shortest possible route.

Grounding

• All metal parts (braking unit, drive, EMC filter) must be connected to a common ground (PE).

• Comply with the minimum cable cross-sections defined in the safety directives:

- From an EMC point of view, it is the area of the cable and the contact with the mounting plate that is important for

operation, rather than the cable cross-section.

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