THREE-CORE INTEGRATED CONNECTION BOX, METHOD OF WITHSTAND VOLTAGE TEST ON TEST SUBJECT CABLE, AND METHOD OF ASSEMBLING THREE-CORE INTEGRATED CONNECTION BOX

摘要

PROBLEM TO BE SOLVED: To provide a three-core integrated connection box, a method of withstand voltage test on a test subject cable, and a method of assembling a three-core integrated connection box which dispense with on-site DC withstand voltage test on an OF cable, make unnecessary switching of a GIS and a transformer terminal, and reduce the amount of use of an SF6 gas to reduce costs and shorten a construction period.;SOLUTION: The three-core integrated connection box 1 is of a three-core structure, and includes a CV-side case 10D to which a CV cable 3 is attached, the CV cable 3 being newly laid based on an OF cable 2 laid in advance, and a three-core integrated insulative connection unit 11 which is connected to the CV-side case 10D and is composed of conductors 31 of the CV cable 3 that are assembled at equal intervals in an insulated state. According to the three-core integrated connection box 1, a three-core integrated isolation case 6 is connected in a sealed state to the three-core integrated insulative connection unit 11 and an insulating oil 61 is injected into the three-core integrated isolation case 6 so that DC withstand voltage test is carried out on the CV cable 3.;COPYRIGHT: (C)2010,JPO&INPIT