Motor leads

rsdoran · Jun 29, 2002

An FYI: The star delta method is not an American concept, it orginated in Europe and was in the US for compressors (hvac and air). To maybe clear the air about motor connections and how to determine connections when not marked I have prepared the following. This site limits text so I am dividing this into parts and creating a web page for it. For a better of view of this go to MY MOTOR WEBPAGE

Code:

<p align="center"><b><font size="4">Electric Motor Wire Marking & Connections</font></b></p>

<p align="left"><b><font size="3"><span style="background-color: #FFFF00">Single Phase
Connections:</span>                                           
<u>(Three Phase--see below)</u><br>
                         
</font><font size="2">Single
Voltage:                                                       </font></b></p>
<div align="center"><center>

<table border="1" width="20%">
  <tr>
    <td width="33%"><font size="2"><b>Rotation</b></font></td>
    <td width="36%"><font size="2"><b> L1</b></font></td>
    <td width="33%"><font size="2"><b>L2</b></font></td>
  </tr>
  <tr>
    <td width="33%"><font size="2"><b>CCW</b></font></td>
    <td width="36%"><font size="2"><b> 1,8</b></font></td>
    <td width="33%"><font size="2"><b>4,5</b></font></td>
  </tr>
  <tr>
    <td width="33%"><font size="2"><b>CW</b></font></td>
    <td width="36%"><font size="2"><b> 1,5</b></font></td>
    <td width="33%"><font size="2"><b>4,8</b></font></td>
  </tr>
</table>
</center></div>

<p align="left"><b><font size="3">                        
</font><font size="2">Dual Voltage: (Main Winding Only)</font></b></p>
<div align="center"><center>

<table border="1" width="30%">
  <tr>
    <td width="20%"><font size="2"><b>Voltage</b></font></td>
    <td width="20%"><font size="2"><b>Rotation</b></font></td>
    <td width="20%"><font size="2"><b> L1</b></font></td>
    <td width="20%"><font size="2"><b> L2</b></font></td>
    <td width="20%"><font size="2"><b>  Join</b></font></td>
  </tr>
  <tr>
    <td width="20%"><font size="2"><b>High</b></font></td>
    <td width="20%"><font size="2"><b>CCW</b></font></td>
    <td width="20%"><font size="2"><b> 1</b></font></td>
    <td width="20%"><font size="2"><b> 4,5</b></font></td>
    <td width="20%"><font size="2"><b>2&3&8</b></font></td>
  </tr>
  <tr>
    <td width="20%" bgcolor="#C0C0C0" bordercolor="#C0C0C0"> </td>
    <td width="20%"><font size="2"><b>CW</b></font></td>
    <td width="20%"><font size="2"><b> 1</b></font></td>
    <td width="20%"><font size="2"><b> 4,8</b></font></td>
    <td width="20%"><font size="2"><b>2&3&5</b></font></td>
  </tr>
  <tr>
    <td width="20%"><font size="2"><b>Low</b></font></td>
    <td width="20%"><font size="2"><b>CCW</b></font></td>
    <td width="20%"><font size="2"><b>1,3,8</b></font></td>
    <td width="20%"><font size="2"><b>2,4,5</b></font></td>
    <td width="20%"><font size="2"><b>  -------</b></font></td>
  </tr>
  <tr>
    <td width="20%" bgcolor="#C0C0C0" bordercolor="#C0C0C0"> </td>
    <td width="20%"><font size="2"><b>CW</b></font></td>
    <td width="20%"><font size="2"><b>1,3,5</b></font></td>
    <td width="20%"><font size="2"><b>2,4,8</b></font></td>
    <td width="20%"><font size="2"><b>  -------</b></font></td>
  </tr>
</table>
</center></div>

<p align="left"><b><font size="4">                   
</font><font size="2">Dual Voltage: (Main & Auxiliary Winding)</font></b></p>
<div align="center"><center>

<table border="1" width="30%">
  <tr>
    <td width="20%"><font size="2"><b>Voltage</b></font></td>
    <td width="20%"><font size="2"><b>Rotation</b></font></td>
    <td width="20%"><font size="2"><b>     L1</b></font></td>
    <td width="20%"><font size="2"><b>    L2</b></font></td>
    <td width="20%"><font size="2"><b>     Join</b></font></td>
  </tr>
  <tr>
    <td width="20%"><font size="2"><b>High</b></font></td>
    <td width="20%"><font size="2"><b>CCW</b></font></td>
    <td width="20%"><b>1,8</b></td>
    <td width="20%"><b>4,5</b></td>
    <td width="20%"><b>2&3,6&7</b></td>
  </tr>
  <tr>
    <td width="20%" bgcolor="#C0C0C0" bordercolor="#C0C0C0"> </td>
    <td width="20%"><font size="2"><b>CW</b></font></td>
    <td width="20%"><b>1,5</b></td>
    <td width="20%"><b>4,8</b></td>
    <td width="20%"><b>2&3,6&7</b></td>
  </tr>
  <tr>
    <td width="20%"><font size="2"><b>Low</b></font></td>
    <td width="20%"><font size="2"><b>CCW</b></font></td>
    <td width="20%"><b>1,3,6,8</b></td>
    <td width="20%"><b>2,4,5,7</b></td>
    <td width="20%"><b>  ---------</b></td>
  </tr>
  <tr>
    <td width="20%" bgcolor="#C0C0C0" bordercolor="#C0C0C0"> </td>
    <td width="20%"><font size="2"><b>CW</b></font></td>
    <td width="20%"><b>1,3,5,7</b></td>
    <td width="20%"><b>2,4,6,8</b></td>
    <td width="20%"><b>  ---------</b></td>
  </tr>
</table>
</center></div>

<p align="left"><b>Single Phase Terminal Markings Identified By Color: <font size="1">(NEMA
Standards)</font><br>
        <font size="2">1-Blue           
5-Black                           
P1-No color assigned<br>
          
2-White         6-No color
assigned       P2-Brown <br>
          
3-Orange      7-No color assigned <br>
          
4-Yellow        8-Red </font></b></p>

Motor leads

rsdoran

Lifetime Supporting Member

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