| 摘要 |
PURPOSE:To furnish a switching device of a phase of a high-tension three-phase distribution line which can switch over the phase connected with a single-phase load, without power stoppage substantially. CONSTITUTION:A contactless switch 1 or a contact-provided switch 2 is fitted in parallel with a disconnection point of a phase (b) to be disconnected, and a contactless switch 3 is fitted between a point located nearer onto the load side than the disconnection point of the phase (b) to be disconnected and a phase (c) to be connected. By giving an opening instruction to the switch 1 or 2 to open it and also by closing the contactless switch 3 at a high speed in succession to the opening of the switch l or 2, switchover of the phase is completed in a moment. |
