The connection of electric motors is also known as “closing”. Three-phase motors can have six or twelve terminals, each pair
of terminals pertaining to a coil. The six-terminal motor coils can be triangulated to operate at 220V or star to operate at 380V or to start at 220V. The twelve-terminal motor coils can be connected in several different ways, that is, in star (Y) and triangle connections. Each coil of the three-phase motor must receive 220V in normal operation, unless it is a special motor for high voltage. Uses Triangle connection for lowest voltage and Star connection for highest voltage.
The voltage with which the motor rexnord mounted bearings can be fed depends on the way
associated with their coils. Such a bond can be star (Y) or triangle (delta) and in triangle the coils receive the existing voltage between phases and in star the coils receive such tension divided by square root. The six-terminal motor can be connected at 220V or 380V; The twelve-terminal motor can be connected at 220V, 380V, 440V, or 760V.