| 摘要 |
PURPOSE:To provide a non-connected feeder system preventing an excessive voltage from being generated at the secondary side of a current transformer. CONSTITUTION:A socket 5 is connected to a secondary coil winding 4 of a current transformer 3 with a feeder loop 2 connected to a constant current type inverter device 1 as a primary coil winding. A contact 5c is provided at the bottom of a socket body 5a so that it can rotate freely. The contact 5c is energized elastically by a winding spring 7 so that one edge of the contact 5c contacts a connection point 5d between the secondary coil winding 4 and a reception metal 5b. When a lamp 6 is fitted to the socket 5, one edge of the contact 5c is released from the connection point 5d and the other edge contacts the lamp 6 for continuity so that a high-frequency AC power is supplied to the lamp 6 to light the lamp 6. When the lamp 6 is not fitted to the socket 5, the secondary side of the current transformer 3 is short-circuited by the contact between the contact 5c and the connection point 5d, thus preventing an excessive voltage from being generated at the secondary side of the current transformer. |
