| 摘要 |
<p>PURPOSE:To effect the DC pressure resistance test of a cable line with good workability by a method wherein a switching means is put ON/OFF by the relative movement of a conductor extracting rod of a testing bushing with respect to the wall surface of an instrument. CONSTITUTION:When a conductor extracting rod 37 provided in a testing bushing 31 receiving the terminal end of a charging cable 30 is taken out or inserted into the wall surface 2 of an instrument, a switch is put ON or OFF. Accordingly, the switch 10 is put OFF to preclude the impression of a high DC voltage on the internal circuit of the instrument when a high DC voltage is impressed from the charging cable 30 on the cable line 20. According to this method, the DC pressure resistance test of the cable line 20, connected to the instrument, can be effected with good workability.</p> |
