| 摘要 |
PURPOSE:To make a device possible to be connected to either of a single phase AC power source and a three-phase AC power source by arranging a changeover switch means freely switched in accordance with a state where a loading means is connected. CONSTITUTION:Four power source input terminals L1-L3 and N and the changeover switch means 102 which is installed between first loading means 105 and 106 and second loading means 108, 109 and 111 and third loading means 113 and freely switches a connection state to the state where only the one-phase of a AC power source is commonly connected to the first loading means 105 and 106 the second loading means 108 109 and 111 and the third loading means 113 and to the state where the threephase of the AC power source is respectively connected to the first loading means 105 and 106, the second loading means 108, 109 and 111 and the third loading means 113 are installed in this device. Then, the device is set to switch to the former state when a single phase two- wire system AC power source is connected to the power source input terminals L1 and N, and to the latter state when a three-phase four-wire system AC power source is connected to the power source input terminals L1-L3 and N. |
