In this tutorial we will show the star delta y δ 3 phase induction ac motor starting method by automatic star delta starter with timer with schematic power control and wiring diagram as well as how star delta starter works and their applications with advantages and disadvantages. For three phase motor we use the direct online starter but mostly for small three phase motor.
Plc Program For Star Delta Motor Starter Plc Motor Ladder
Star delta motor control diagram. Power control wiring diagram of star delta starter. Star delta starters consist of a power circuit and control circuit. But high load 3 phase motor we use the star delta starter for motor. The power circuit uses to create contact between the motor and three phase power supply. Here the circuit diagram of star delta starter explained in detailhere you will learn the connection of star delta starter with three phase motorthe power circuit diagram and control circuit diagram of an automatic star delta starter are explained belowlets understand the star delta starter diagram. R y b red yellow blue 3 phase linescb general circuit breakermain mai supplyy starδ deltac1 c2 c3 contatcors power diagramol over load relayno normally opennc normally closed k1 contactor contactor coil k1no contactor holding coil.
Star delta starter without timer for 3 phase induction motor. This type of starting is suitable for small motors below 5 hp 375 kw. Star delta starter wiring diagram this post is about the main wiring connection of three phase motor with star delta starter and control wiring diagram of star delta starter. For star delta staterthe motor connection must have 6 cables from control panel and 6 terminals at induction motor u1u2v1v2w1w3to wiring the motor connection for star delta starterthe important thing that we must fully understand is about the basic of star delta magic triangle. Star delta starter use for 3 phase motor control star delta starter control high starting current and high starting torque control 6 lead 3 lead star connection and 3 lead delta connection of. Star delta connection diagram and working principle.
Star delta connection circuit diagram. The star delta wye delta starting method controls whether the lead connections from the motor are configured in a star or delta electrical connection. This is a big advantage of a star delta starter as it typically has around 13 of the inrush current compared to a dol starter. A dual starter connects the motor terminals directly to the power supplyhence the motor is subjected to the full voltage of the power supplyconsequently high starting current flows through the motor. A star delta starter is a type of reduced voltage starterwe use it to reduce the starting current of the motor without using any external device or apparatus. The initial connection should be in the star pattern that results in a reduction of the line voltage by a factor of 13 577 to the motor and the current is reduced.
Refer to the below star delta circuit. The control circuit uses to control the starter circuit such as on off and tripping operations.
Gallery of Star Delta Motor Control Diagram
