star-delta

Figure 60 - Automatic star-delta connection (control circuit)

5. Asynchronous motors Hans-Friedrich Hoyer 1991

The advantage of the star-delta connection for limiting the considerable starting current in an effective manner is, however, only possible through a further reduction in the already minimal initial torque.

5. Asynchronous motors Hans-Friedrich Hoyer 1991

Transformers single-phase transformer with iron core (if errors cannot be made, the core need not be drawn) single-phase transformer with iron-core and 3 windings (core not represented) three-phase transformer in star-star connection (core not represented) three-phase transformer, star-delta connection three-phase autotransformer in star connection

1. Selected Graphical Symbols of Electrotechnology Klaus Janoske 1991

Consequently, the strands can be interlinked in a star-delta arrangement (Cp. Figure 48).

5. Asynchronous motors Hans-Friedrich Hoyer 1991

The star-delta connection is mainly used for low and medium powered machines.

5. Asynchronous motors Hans-Friedrich Hoyer 1991

Alternating current connections star connection delta connection star-delta connection zig-zag connection

1. Selected Graphical Symbols of Electrotechnology Klaus Janoske 1991

Reversing contactor circuit with star-delta starting main circuit

5. Contactor Circuits Klaus Janoske 1991

Circuit diagram for the control of the three-contactor star-delta connection

5. Contactor Circuits Klaus Janoske 1991

Circuit diagram for the control of the reversing contactor circuit with star-delta starting

5. Contactor Circuits Klaus Janoske 1991

Figure 59 - Automatic star-delta connection (main circuit)

5. Asynchronous motors Hans-Friedrich Hoyer 1991