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1трехфазная четырехпроводная система переменного тока — [Интент] EN three phase four wire a.c. system system comprising four conductors of which three are connected to a three phase supply and the fourth to a neutral point in the source of supply [IEC 60092 507, ed. 2.0 (2008 01)] FR distribution en… …
2трехфазная четырехпроводная система переменного тока — [Интент] EN three phase four wire a.c. system system comprising four conductors of which three are connected to a three phase supply and the fourth to a neutral point in the source of supply [IEC 60092 507, ed. 2.0 (2008 01)] FR distribution en… …
