Basic Start/Stop AC Motor Control Schematics

The following Drawings / Schematics demonstrate Basic Start & Stop Control Circuitry for 3 Phase, Squirrel-Cage Rotor type AC Induction Motors.

-------------------------------------------
A: Full-Voltage Start / Stop Control
-------------------------------------------


[Linked Image]

Schematic #1: Full-Voltage Start / Stop ("3-Wire") AC Motor Control;
Control Circuit = Line Voltage (Motor Voltage).

..........

[Linked Image]

Schematic #2: Full-Voltage Start / Stop ("3-Wire") AC Motor Control;
Control Circuit = Low Voltage (via Transformer connected to Motor Circuit).

..........

----------------------------------------------
B: Basic Wye-Delta Start / Stop Control
----------------------------------------------


[Linked Image]

Schematic #3: Wye-Delta Reduced Voltage Start / Stop Motor Control.

..........


end.

Scott " 35 " Thompson
Just Say NO To Green Eggs And Ham!