| 摘要 |
<p>PURPOSE:To effect the DC pressure resistance test of a cable line safely with high operability by a method wherein an internal circuit is connected to and/or intercepted from the conductor extracting rod of a bushing through an electric connecting member. CONSTITUTION:A bushing 11 is provided with an electric connecting member 15 for connecting a conductor extracting rod 13, connected to the internal circuit of an instrument, to a cable connecting terminal A electrically on the inside of the bushing 11. The electric connecting member 15 connects the conductor extracting rod 13 to an internal electrode 14 and/or disconnects the conductor extracting rod 13 from the internal electrode 14 by the operation of an insulating rod 16, whose one end is projected out of the bushing 11. As a result, the impression of a testing voltage on the internal circuit of an instrument can be prevented during charging the testing voltage on the cable line 20 while mounting a charging cable 30 on a charging terminal B. According to this method, the DC pressure resistance test of the cable line 20, connected to an instrument, can be effected safely with high operability.</p> |
