DEVICE AND METHOD FOR TESTING CAST ARTICLE

PROBLEM TO BE SOLVED: To suppress external discharge of a cast electric apparatus and to measure the characteristic of partial discharge from the inside. SOLUTION: This device is provided for testing a cast article formed by embedding in an insulating layer 7 an electric member such as a vacuum valve which has a pair of separable contacts 2 and 3. When the diameter of a main circuit conductor such as a movable-side energization shaft 5 which is led out from the cast article is made 1 and the diameter of a lead wire 16 which impresses voltage on the main circuit conductor is made 3, while the diameter of a connecting electrode 15 disposed between the lead wire 16 and the main circuit conductor is made 2, the relations 2> 3> 1 are established. An electric test is performed with the external discharge suppressed in this way. COPYRIGHT: (C)2011,JPO&INPIT