Ayuda con estos diagramas de motores electricos

me podrian explicar estos diagramas
<script src=‘http://imageshack.us/shareable/?i=83587450.png&s=263’ type=‘text/javascript’></script><noscript></noscript>

<script src=‘http://imageshack.us/shareable/?i=98637241.png&s=806’ type=‘text/javascript’></script><noscript></noscript>