坑内用新型高圧ケーブルについて
1959 年 75 巻 848 号 p. 77-80
詳細
1959 年 75 巻 848 号 p. 77-80
These are tests to examine quality of three types of mining power cable. i. e.
(1) the GR-1 insulated cable
(2) the polyethylen insulated cable
(3) the P.T.A. type paper insulated cable.
Test result
The first two (synthetic material insulated) are superior to the last from the stand-point of safety, mechanical and electrical strength, and economical use.
