User guide

Electrical installation
Wiring
Design of the cables
4
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EDK94ZPS113 DE/EN/FR/ES/IT 4.0
4.3 Wiring
4.3.1 Design of the cables
ƒ The cables used must comply with the approvals required for the location
(e.g. UL).
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 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 Motor holding brake (shielding is required when being integrated into the
motor cable; connection to optional motor brake control)
ƒ Motor temperature monitoring
ƒ External brake resistor ( Mounting Instructions of the brake resistor)
The following connections need not be shielded:
ƒ Mains
ƒ DC bus
4.3.2 How to connect the shield
E94AZPS004
Fig. 4−2 Connect the shield to the shield sheet (graphics on the right: motor cable for device sizes
II and III)