Connecting Start in Delta-Star Three-Phase Motor

ANSWER

Let's watch Three Phase Motors (Squirrel Cage) that are most commons and will learn how wire and connect Electrical power and Control in Delta-Star

Star-Delta Connection:

A Motor Start Delta - Star may be used for Loads over 10 HP (recommended) and the most important is reduce the Pick Current Start , a normal Delta Start in a big Motor may reach very high Currents in few seconds, it may be difficult to our electrical Systems because the Feeder may have Voltage Drops in the line and other electrical components may be affected, and in these peaks the Thermal Overload Relay may operate

Total Current Comsumption (In) is distributed in both sides of Motor; IT = I1 + I2

SIMULATING MOTOR START DELTA-STAR