The star-delta starter is a common method used in starting heavy three-phase motors. Although there are other new ways of starting heavy-duty motors, you can still benefit from learning this popular traditional method as an automation engineer. Here is the basic idea. When you turn on a three-phase motor, in the first few minutes of starting the motor, it draws up to 4 times more current than the rated current. This huge amount of current can damage the motor windings and also the electrical network. In the star-delta starter, we first run the motor in star connection and then after a few minutes, when the motor gains sufficient speed, we’ll switch the connection to Delta. In star connection, the current that the motor draws is one-third of the rated current so by running the motor in star connection we can reduce the startup current. ========================== To stay up to date with our last videos and more lessons, make sure to subscribe to this YouTube channel: http://goo.gl/Y6DRiN ============================= Like us on Facebook: https://www.facebook.com/therealpars/ Follow us on Twitter: https://twitter.com/realpars Follow us on LinkedIn: https://www.linkedin.com/company/real...
