Interconnection of primary lightning arrester ground and grounded neutral or the secondary main

VARIOUS possible transformer connections and protective devices on standard 60-cycle overhead power and lighting distribution systems having 4,000-volt four-wire primaries and power and lighting secondary mains have been investigated over a period of years. Considerable information was furnished by an experimental line with an insulated artificial cloud charged to potentials up to 150 kv. by means of a surge generator.