Lenze E94AZPP - Manual (Page 53)

Wiring the installation backplane
Wiring
Design of the cables
5
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53 EDK94ZPP0364 DE/EN/FR/ES/IT 2.1
5.3.3 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 External brake resistor ( , Mounting Instructions of the brake resistor)
The following connections need not be shielded:
ƒ Mains
ƒ DC bus
5.3.4 How to connect the shield
E94AZPS004
Fig. 5−5 Connect the shield to the shield sheet (graphics on the right: motor cable for device sizes
II and III)