| 摘要 |
PURPOSE:To protect one device in a device for operating with a certain relation by controlling the other device by detecting the load current of the one device. CONSTITUTION:When the load current value of the first motor 1 becomes the prescribed value larger than the reference value so that the voltage detector 9 operates the third relay 13 with the result that its make contact 13a is closed, a self-holding relay 11 is energized, thereby closing its make contact 11a to perform a self-holding. When this self-holding relay 11 is operated, the break contact 11b is opened. Accordingly, the first and second motors 1, 4 are deenergized. In case of reoperation, a manual switch 10 is opened and may be reclosed. |
