| 摘要 |
PURPOSE:To economize power by installing a voltage drop generator in series with a switch for power turning a load equipment ON/OFF, using the switch for power as a changeover switch and extracting one end of a power supply for a terminal equipment from a contact on the side opposite to the operation side. CONSTITUTION:When the operation-side contact of a changeover switch 4' for power is turned ON, currents are made to flow through a voltage dropping instrument 6, and voltage is generated at both ends of the voltage dropping instrument 6. The voltage is received by terminals 32, 33 and voltage is forwarded to the secondary side in a transformer 16'. When a contact on the side reverse to the operation side of the changeover switch 4' for power is turned ON, voltage is received by terminals 32, 34 and voltage is sent to the secondary side in the transformer 16'. The fluctuation of voltage on the secondary side of the transformer 16' by connection to either side of the contact of the changeover switch 4' for power can be inhibited at a small value by properly selecting the ratio of the number of turns between the terminal 32 and terminal 33 of the transformer 16' to that between the terminal 33 and the terminal 34. |
