Installation
Installation according to EMC (installation of a
CE−typica
l drive system)
46
CG Drives & Automation
5.3
Installation according to EMC (installation of a
CE−typical
drive system)
Design of the cables
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.
The cables used must comply with the approvals required for the location (e.g. UL).
5.3.1
Shielding
Requirements
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:
Motor
Motor temperature monitoring
Analog signals (inputs and outputs;
single−sided
shield connection to the controller)
Fieldbus communication (e.g. CANopen,...)
The following connections need not be shielded:
Mains
24−V
supply
Digital signals (inputs and outputs).
– We recommend to use shielded cables for a cable length from approximately 5 m
on or in environments with strong interferences.
Connection system
Extensively apply shielding directly in the plugs.
Apply shielding above EMC cable glands.
Summary of Contents for CDN40-012-65
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