| 摘要 |
PURPOSE: A vacuum contractor switch control circuit is provided to prevent a loss due to the malfunction of an external power supply by adding an anti-pumping function. CONSTITUTION: An input terminal(100) applies power. An on-switch(110) determines whether to supply power to a closing coil. An off-switch(190) determines whether to supply power to a trip coil. A relay(180) prevents the power from being supplied to the closing coil. A first switch(140) is serially connected between the on-switch and the closing coil to determine the application of the power.
|
