One is known as star connection and the other one is delta connection. Three phase wyey connection initially we explored the idea of three phase power systems by connecting three voltage sources together in what is commonly known as the y or star configuration.
This configuration of voltage sources is characterized by a common connection point joining one side of each source.
You can find out more Diagram below
Star delta three phase motor connection. Three phase motor connection stardelta y d reverse and forward with timer power control diagram as we have already shared the starting method of three phase motor by star delta starter with timer circuit power and control circuits. Delta or mesh connection d system is also known as three phase three wire system 3 phase 3 wire and it is the most preferred system for ac power transmission while for distribution star connection is generally used. Three phase four wire system can be derived from the delta connection.
As we know the main purpose of star delta starter is to start the three phase induction motor in star connection while run in delta connection. A timer in star delta starter for a 3 phase motor is intended to do the move from star mode utilizing which the motor runs on a decreased voltage and current and produces less torque to the delta mode indispensible for running the motor at its full power utilizing high voltage and current to transform a high torque. Now in the below diagrams three phase motor will rotate in two directions viz forward and reverse.
In a three phase circuit there are two types of connections. While keep in mind that star delta starter can only be used for low to medium voltage and light starting torque induction motors. In this article difference between star and delta connection are explained.
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