ABB Relion 670 Series Installation Manual page 58

Section 6
Connecting
52
For RS485 only: at the IED end, always connect the shield to the IED with the shield
connection clamp, shown below.
GUID-682A59D0-950C-4D89-8318-984E0A8B2761 V1 EN-US
Figure 32: Shield connection clamp
The cable shield shall be properly connected to the IED chassis by the cable clamp
with the maximum open conductor length of 1.57" between clamp and terminals. If
double shielded cable is used, the inner cable shielding should be connected at the
external equipment end only. At the IED terminal end, the inner shield should be
isolated.
1MRK 514 026-UUS F
IEC13000234-1-en.vsd
670 series
Installation manual