Three Phase Motor Star/Delta Reverse & Forward without Timer
3-Phase Motor Connection Star/Delta (Y-Δ) Reverse-Forward & Up-down without Timer Power, Control & Wiring Diagrams
In this motor starter, there are four Contactors and switches (Two ON-Push and OFF-Push) are used to change the rotating direction of a three phase motor such as Revers, Forward, Up or down. As there is no timer used in the control circuit, the operation is semi-automatic or manual.
The power circuit and schematic wiring diagram shows that L1 and L3 have been changed for reverse and forward operation of the three phase motor (as changing two lines out of three will change the rotation of the motor in opposite direction). This kind of motor starting methods through motor starters are needed and used in lathe machines and cranes etc. to change the rotation of motors.
Related Posts:
Three Phase Motor Star/Delta Reverse & Forward with Timer
Three Phase Motor Connection Reverse and Forward – Power and Control Wiring diagrams
Working of the Circuit:
If we press the pushbutton for Forward Operation, the motor will start in forward or Up position via K1 Contactor. Similarly, the pushbutton for Reverse operation is used to rotate the motor in Reverse or Down position via K2. Contactor (Where as two lines are changes with respect to the first contactor i.e. K1).
Keep in mind that only one operation (either forward or reverse) is possible at a time due to electrical interlocking i.e. if pushbutton for Forward direction is ON, we will have to stop the starter before changing the rotation of the motor. In simple words, both K1 (for Forward) and K2 (for Reverse) contactors can’t be ON at the same time.
Three Phase Motor Star/Delta Reverse & Forward without Timer
3-Phase Motor Connection Star/Delta (Y-Δ) Reverse-Forward & Up-down without Timer Power, Control & Wiring Diagrams
In this motor starter, there are four Contactors and switches (Two ON-Push and OFF-Push) are used to change the rotating direction of a three phase motor such as Revers, Forward, Up or down. As there is no timer used in the control circuit, the operation is semi-automatic or manual.
The power circuit and schematic wiring diagram shows that L1 and L3 have been changed for reverse and forward operation of the three phase motor (as changing two lines out of three will change the rotation of the motor in opposite direction). This kind of motor starting methods through motor starters are needed and used in lathe machines and cranes etc. to change the rotation of motors.
Related Posts:
Three Phase Motor Star/Delta Reverse & Forward with Timer
Three Phase Motor Connection Reverse and Forward – Power and Control Wiring diagrams
Working of the Circuit:
If we press the pushbutton for Forward Operation, the motor will start in forward or Up position via K1 Contactor. Similarly, the pushbutton for Reverse operation is used to rotate the motor in Reverse or Down position via K2. Contactor (Where as two lines are changes with respect to the first contactor i.e. K1).
Keep in mind that only one operation (either forward or reverse) is possible at a time due to electrical interlocking i.e. if pushbutton for Forward direction is ON, we will have to stop the starter before changing the rotation of the motor. In simple words, both K1 (for Forward) and K2 (for Reverse) contactors can’t be ON at the same time.
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