Wiring Diagram Of Starting Motor Amongst Car Transformer (4 Steps)

Wiring Diagram of Motor starter amongst Auto Transformer (4 Steps), in addition to the explanation how it work.
Wiring Diagram of Auto Transformer circuit amongst iv Steps system
Wiring Diagram The Auto Transformer (Auto Transformer) circuit organization iv Steps for Three-Phase Starting Motor.

There are diverse circuit systems used to starting Three-Phase motors, including:

Three-Phase Electric Motor Starter
  • Starting Motor amongst DOL (Direct On Line) system
  • Starting Motor amongst the Star-Delta system
  • Starting Motor past times using the Auto Transformer (Auto Transformer).
  • Starting Motor amongst Soft Starter system
  • Starting Motor amongst Rotor Resistance system
  • Starting motor using an inverter

In add-on to the DOL Series (Direct On Line), diverse systems starting from the electrical motor Three-Phase to a higher house aim to minimize the surge of electrical current which tin attain iv to half dozen times the nominal electrical current at the offset fourth dimension the electro motor is operated (start).


Wiring Diagram of Starting Motor amongst Auto Transformer (4 Steps)

Starting organization for Three-Phase electrical motor that is widely used is the Auto Transformer system.

Generally Auto Transformer is used for Electro motors amongst a ability sum of but about 22Kw to 150Kw.
ElektroMotor 22kw to 150kw = Auto Transformer
The Auto Transformer used is VT (Voltage Transformer), There are iii windings for Phase R-S-T, each of which has a percent drib inward steps.

In the Auto Transformer that is widely used in that place are a set out of Steps for starting the Motor, the percent of voltage reduction per Step ranges from 40%, 60%, 80%, etc.

The Auto Transformer Motor Starter circuit is made inward such a agency that it tin operate automatically to drain the Source voltage through the Auto transformers installed starting from the machine transformer roll which has the highest resistance (lowest current), until finally the Electro motor gets a 100% voltage render straight from the source (380V ).

When the source voltage flows through the roll amongst the highest resistance value on the Auto transformer, the incoming voltage at the electromotor becomes low, the lower the resistance passed, the greater the voltage entering the electro motor.

The next is an example of a Wiring diagram for a motor starting circuit amongst an Auto 4-step transformer.

Auto transformer circuit amongst iv pace starting motor system, which is 40%, 60%, 80% until the lastly 100% (380V source voltage).


Wiring Diagram of Motor starter amongst Auto Transformer  Wiring Diagram of Starting Motor amongst Auto Transformer (4 Steps)
Auto Transformer


Explanation About wiring diagram of Auto Transformer organization for Starting Motor
  • When Push Button "On" is pressed, the voltage of the MCB flows towards Coil K2, in addition to Coil K5. thus Magnetic Contactor K2 in addition to K5 are connected.
  • Magnetic Contactor K2 is connected in addition to flows Three-Phasease voltage to the Auto transformer, thus the voltage passes through the machine transformer.
  • STEP-1. Magnetic Contactor K5 is connected to drain the voltage amongst a value of 40% towards the Electro motor, thus the Electro motor starts operating amongst 40% voltage from the Auto transformer.
  • Next according to the Time laid upwards inward Timer T1, subsequently the fourth dimension is reached thus Timer T1 works, decides the voltage to Coil K5, in addition to connects the voltage to Coil K4.
  • Magnetic Contactor K2 stays connected.
  • STEP-2. The voltage from the Auto transformer flows to the Electro motor via the Magnetic contactor K4, amongst a voltage value of 60%. Here Electro motors start to sense an growth inward voltage from 40% to 60%.
  • Next according to the Time assault the T2 Timer, subsequently the fourth dimension is reached thus the T2 Timer works, decides the voltage to Coil K4, in addition to connects the voltage to Coil K3.
  • Magnetic Contactor K2 stays connected.
  • STEP-3. The voltage from the Auto transformer flows to the Electro motor via the K3 Magnetic contactor, amongst a voltage value of 80%. Here Electro motors start to sense an growth inward voltage from 40% to 60%, increasing to 80%.
  • Next according to the Time assault the T3 Timer, subsequently the fourth dimension is reached thus the T3 Timer works, decides the voltage to Coil K3, in addition to connects the voltage to Coil K1.
  • When the Magnetic Contactor K1 is connected, causes the Magnetic Contactor K2 to live disconnected, in addition to the entire timer likewise stops working because the voltage to the curl is decided through the NC end on the Magnetic contactor K1.
  • STEP-4. Voltage from Source flows to Electro motor via Magnetic contactor K1, amongst a voltage value of 100%. thus that the electro motor is operating unremarkably amongst total voltage.
  • In Step-4, alone the K1 Magnetic contactor is connected, land the other Magnetic Contactor is disconnected, thus that the Auto transformer status has no voltage at all.
  • This circuit is equipped amongst a security system, amongst a working organization when the voltage goes to Coil, i of the Magnetic Contactors, offset passes the previous NC Magnetic Contactor end to avoid the collision of 2 voltage contactor.




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