noun
Usage: capitalized Y
: a box containing three wires of equal resistance joined to a common point and used in connection with a three-phase electrical system to furnish the central point
noun
Usage: capitalized Y
: a box containing three wires of equal resistance joined to a common point and used in connection with a three-phase electrical system to furnish the central point
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012