Lenze i700 Manual Bedienungsanleitung PDF herunterladen (Seite 91)

Electrical installation

Installation according to EMC (installation of a CE−typical drive system)

Shielding

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EDS700ACBA EN 4.0

6.3 Installation according to EMC (installation of a CE−typical drive system)

Design of the cables

ƒ It is imperative to comply with the regulations concerning minimum cross−sections

of PE conductors. The cross−section of the PE conductor must be at least as large as

the cross−section of the power connections.

ƒ The cables used must comply with the approvals required for the location (e.g. UL).

6.3.1 Shielding

Requirements

ƒ The effectiveness of a shielded cable is reached by:

– Providing a good shield connection through large−surface shield contact.

– Using only braided shields with low shield resistance made of tin−plated or

nickel−plated copper braid.

– Using braided shields with an overlap rate > 70 % and an overlap angle of 90 °.

– Keeping unshielded cable ends as short as possible.

Use system cables or shielded cables for these connections:

ƒ Motor

ƒ Feedback systems

ƒ Motor holding brake (shielding is required when being integrated into the motor

cable; connection to optional motor brake control)

The following connections need not be shielded:

ƒ 24 V supply

ƒ Digital signals (inputs and outputs)

Connection system

ƒ Connect the shield with a large surface and fix it with metal cable binders or a

conductive clamp.

ƒ Connect the shield directly to the corresponding device shield sheet.

– If required, additionally connect the shield to the conductive and earthed

mounting plate in the control cabinet.

– If required, additionally connect the shield to the cable clamp rail.

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Lenze i700 Manual Bedienungsanleitung Seite 91