Issue:
IT,TT,TN in grounding system

Product Line:
ATV71

Environment:
All

Cause:
Don't know what the acronym "IT" stands for in a grounding circuit for line filter application.

Resolution:
http://www.electrical-installation.org/enwiki/Characteristics_of_TT,_TN_and_IT_systems

Released for:Schneider Electric South Africa