| 摘要 |
<p>The present invention relates to an improved star delta starter for starting a three phase star delta motor comprises improved power contactors configured to have a pair of three pole delta and main contactors, and a single pole star contactor for supplying AC power to star position and delta position, a timer control with a logic circuit for controlling AC power supply switching operation for star position and delta position and for adjusting a time delay of switching over from star connection to delta connection, an overload relay for protecting motor from overload, and start and stop push buttons to perform starting and stopping operation of star delta starter.</p> |
