DEVICE FOR THE NEUTRAL EARTHING OF AN INDUSTRIAL ELECTRIC PLANT Russian patent published in 1995 - IPC

FIELD: electric power engineering. SUBSTANCE: lengthy earth electrode with discrete or uninterrupted current leakage is used as a neutral protective conductor. The phase conductors of the power network are disposed from the lengthy earth electrode at a distance of not more than one fifth of its length corresponding to the network section from the power supply to the place of short circuit. A structural carcass of an industrial building or structure is used as a lengthy earth electrode. EFFECT: lowered potential of the electric plant to the safety values independent of the protection high-speed response. 1 dwg