Connecting Protective Earthing To Local Hmi - ABB RELION REX640 Installation Manual

Section 5
Connecting
5.3.2
60
GUID-38B534BA-2733-44B0-AF98-C964FCF6D323 V1 EN
Figure 47: Location of the protective earth pin
Each protection relay must have its own earth lead connected to
the earth circuit connector.
2. Connect the earth lead to the earth bar.
3. Thread the copper cable on the protective earth.
4. Tighten the protective earth screw to 6 Nm ±5%.
5. Support the earth lead so that it cannot break or weaken.
Observe the mechanical, chemical or electrochemical conditions.

Connecting protective earthing to local HMI

Connect the LHMI to earth using an earth lead of at least 6.0 mm
1. Loosen the protective earth screw T20 on the LHMI to connect a separate earth
protection lead.
1MRS759115 A
2
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REX640
Installation Manual