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. From this motor nameplatewe can see it have 2 connection and 2 voltage valueif our power supply voltage is 415 vac for 3 phasewe need to setting the motor terminal in star connection.
Connect the motor in delta style using six cables or use a star delta starter as power of motor dictates.
You can find out more Diagram below
Three phase star delta connection in motor terminal. The direction of rotation of an electric motor can be changed anytime and easily at the motor terminals. It mean terminal cooper plate w2u2 and v2 connect in one linehere i attached picture about motor terminal in star position. Below is a given table which compares both star and delta connections showing the exact difference between star y and delta d connections.
Comparison between star and delta connections we mostly use the terms star and delta in electrical systems while discussing three phase ac circuits and electric motors. In three phase motors the windings configuration can easily be changed from a star or y connection to a delta or mesh connection at the motor terminal box. Test all the combinations in one of the ends of the coils left the other side fixed.
Now in the below diagrams three phase motor will rotate in two directions viz forward and reverse. 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. I had this problem once with a motor which losses is terminal block and solved it following these steps identify the coils measuring continuity.
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