This FAQ has been written for NEAL (North East Africa and Levant) region. If you are looking for information for another region, please select the correct country from the top-left dropdown in the page and 'Navigate to Browse FAQs' in the Support menu.
In order to achieve the basic "earthing" connection between RM6 and the substation earth, it it not required to have the "additional earth busbar".
As shown below, the position where the substation earthing is applied on the top-back side of the RM6.
The "additional earth busbar" is an option installed in cable compartment which becomes necessary only in case the earth fault current in the RM6 installation is equal to or exceeding 6kA.
The value of earth fault current essentially depends on the electrical network, earthing system/type & estimated fault levels to earth according to limiting impedances.
As shown below, the position where the substation earthing is applied on the top-back side of the RM6.
The "additional earth busbar" is an option installed in cable compartment which becomes necessary only in case the earth fault current in the RM6 installation is equal to or exceeding 6kA.
The value of earth fault current essentially depends on the electrical network, earthing system/type & estimated fault levels to earth according to limiting impedances.
Released for: Schneider Electric Egypt and North East Africa
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