Wiring Diagram Of Auto Transformer Starter

3 typical car starting system diagram the typical starting system wiring diagrams can divide into non relay control type single starter relay control type and security starter relay control type.

Wiring diagram of auto transformer starter. There are various starter used to start induction motor like direct online starte r soft starter s tar delta starter auto transformer starter auto transformer starter is used for large hp motor. Autotransformer starter working wiring and control diagram. This versatility makes the autotransformer starter very popular. A double throw switch s is used to connect the auto transformer in the circuit for starting.

They are the start contactor s main contactor m and the run contactor r. Operation of a practical autotransformer starter. The starter is connected to one particular tapping to obtain the most suitable starting voltage. Autotransformer starter diagram stage 1 at starting auto transformer is star connected by activating star contactor km1 and then the run contactor km2 is closed.

A wiring diagram is a simplified traditional photographic depiction of an electrical circuit. By reducing the voltage the current drawn from the line is reduced during start up. An auto transformer starter makes it possible to start squirrel cage induction motors with reduced starting current as the voltage across the motor is reduced during starting. Variety of control transformer wiring diagram.

The specific circuit needs to be respectively learned referring to different typical control circuits. The figure below shows the motor with the auto transformer starter. Circuit diagrams autotransformer part winding autotransformer hoa an autotransformer starter reduces inrush current by using a transformer in the line just ahead of the motor to step down the voltage applied to the motor terminals. There are three main contactors that play critical role in auto transformer reduced voltage starting.

It is provided with a number of tappings. Readers are encouraged to identify these in. Starting is too high the 50 tap is available. It reveals the components of the circuit as simplified forms and also the power and signal links in between the gadgets.

In contrast to the star delta connection only three motor leads and terminals are required. Wiring diagram book a1 15 b1 b2 16 18 b3 a2 b1 b3 15 supply voltage 16 18 l m h 2 levels b2 l1 f u 1 460 v f u 2 l2 l3 gnd h1 h3 h2 h4 f u 3 x1a f u 4 f u 5 x2a r power on optional x1 x2115 v 230 v h1 h3 h2 h4 optional connection electrostatically shielded transformer f u 6 off on m l1 l2 1 2 stop ol m start 3 start start fiber optic. The circuit for a three coil autotransformer starter is similar except that an additional transformer winding would be inserted in the l2 leg.