ABB Relion 611 Series Installation Manual page 45

1MRS757452 D
611 series
Installation Manual
GUID-9AF57ED6-2BF2-45F6-BC6C-DEF12DB9A899 V1 EN
Figure 26: The protective earth screw is located between connectors X100
and X110
The earth lead should be as short as possible but extra length is
required for door mounting.
Each protection relay must have its own earth lead connected to
the earth circuit connector.
2. Connect the earth lead to the earth bar.
Use either stripped wire screwed between a washer cup and the protective earth
screw or a ring lug.
Select a suitable ring lug to fit under the M4 screw.
3. Tighten the protective earth screw.
4. Support the earth lead so that it cannot break or weaken.
Be aware of the mechanical, chemical and electrochemical environment.
Section 5
Connecting
37