Shielded Cable - IACDRIVE I5300 Series User Manual

EMC

7.4 Shielded Cable

7.4.1 Requirements for Shielded Cable
The shielded cable must be used to satisfy the EMC requirements of CE marking. Shielded
cables are classified into three-conductor cable and four-conductor cable. If conductivity
of the cable shield is not sufficient, add an independent PE cable, or use a four-conductor
cable, of which one phase conductor is PE cable.
The three-conductor cable and four-conductor cable are shown in the following figure.
To suppress emission and conduction of the radio frequency interference effectively, the
shield of the shielded cable is cooper braid. The braided density of the cooper braid should
be greater than 90% to enhance the shielding efficiency and conductivity, as shown in the
following figure.
Insulation jacket
The following figure shows the grounding method of the shielded cable.
Figure 7-1 Grounding of the shielded cable
PE conductor
and shield
Copper shield
Shield
PE
Copper braid
The shield
must be
grounded .
- 252 -
I5300 User Manual
Shield
PE
Internal insulation
Cable core