As a new type of equipment

the 220 kV GIS busbar double-disconnection isolating switch can effectively solve the current GIS interval busbar power failure during expansion. At present

the targeted experimental scheme for this new type of equipment is imperfect. This article first uses the traditional GIS test scheme to apply to the new type of double-break busbar isolation switchgear

and analyzes its advantages and disadvantages. Based on these analysis

a new type of withstand voltage test is proposed which uses the double bus as a bridge and the self-characteristics of the double-fracture disconnector fully. During the first phase construction of the substation

the voltage withstand test can be carried out on the double-break busbar disconnector with this method.