| 摘要 |
PURPOSE:To ensure a safety of equipment, with a condition before power interruption maintainable even for an interruption of service, by applying a manual switch of self-resetting type in the power on-off control circuit, to store a state of on-off in memory to the above with self-holding relays used. CONSTITUTION:A power, fed from a commercial power source 17 to a power unit 16, is on-off operated by a manual switch 15 and a remote power off signal generating switch 14. The manual switch in the power on-off control circit is normally making a contact in a direction as shown in the drawing, however, with a self-resetting type switch applied that makes a contact to an oppositely facing contact by manually pushing the switch and returns to the former state of position again by a release of hand from the switch. And with a combination use made for self-holding relays 1 to 4, reclosing, after disconnection of power by a remote power off signal, will be operated only by pushing the manual switch 15. |
