| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a closed electric apparatus that can further be reduced in installation space by simplifying the constitution of a connecting point of a lightning arrester, and its voltage-application test method. <P>SOLUTION: The closed electric apparatus is constituted such that: the upper end of the closed electric apparatus is air-tightly sealed with an end plate 21; the lower end of the electric apparatus is non-air-tightly connected to an opening formed at a lid plate 30, and a cylindrical insulating body 22 is arranged so as to be opened to the outside of a lower closed vessel 15 at its lower end internal part; the end plate 21 of the cylindrical insulating body 22 is connected to a main circuit conductor 17 in the lower sealed vessel 15 via a main circuit connecting collector element 20; a lightning arrester connecting collector element 23 installed to the end plate 21 is arranged so as to be located inside the cylindrical insulating body 22; the lightning arrester 7 is inserted from the lower open part of the cylindrical insulating body 22; and one end of the lightning arrester is detachably connected to the lightning arrester connecting collector element 23. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
