Three Phase Motors

Delta-Wye Connections

3ph-conn.gif 3ph_fig2.gif dw292.gif

Wye Start/Delta Run

IronLoss.jpg

Motor Connection Wiring

motcon04.jpg motcon05.jpg motcon06.jpg motcon07.jpg motcon08.jpg motcon09.jpg motcon10.jpg motcon11.jpg motcon12.jpg motcon14.jpg motcon15.jpg motcon16.jpg motcon17.jpg

Autotransformer Starter on 50% Tap

auto_tx50.gif

Autotransformer Starter on 65% Tap

auto_tx66.gif

Motor Current vs. Rotor Speed

curr_spd.jpg

Iron Loss for Motors

IronLoss.jpg

NEMA Torque Curves

NEMA3101.gif

Primary Resistor Starting

NEMAFIG5.gif

Wye-Delta Starting

NEMAFIG6.gif

Part-Winding Starting

NEMAFIG7.gif

Autotransformer Starting on 65% Tap

NEMAFIG8.gif

Starting Comparision Curves

NEMAFIG9.gif

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