Connecting Ring-Lug Type Wires; Connecting Protective Earthing - ABB Relion 620 Series Installation Manuals

Section 5
Connecting
5.2.1
5.3
36
See the application manual for product-specific connection diagrams.

Connecting ring-lug type wires

Ring-lug type insulated terminal can be used for signal connector X120 for REF620
and REM620, and both X115 and X120 for RET620. The maximum outside diameter
for the M4 ring-lug type terminals is 9 mm.

Connecting protective earthing

The earth lead must be at least 6.0 mm
cross section of the wire must be increased.
Use fine copper wire as the earth lead.
1. Loosen the protective earth screw (T20) to connect a separate earth protection
lead.
GUID-45CD6F52-4056-4CE8-88C7-7B995F882388 V1 EN
Figure 28: The protective earth screw is located between connectors X100
and X105
1MRS757641 E
2
. If the earth lead is long, the
620 series
Installation Manual