To solve such problems about the isolating switch in the 220 kV transformer station of Yangcheng International Power Co.

Ltd.as insufficient open/close actions

mechanism jamming

components rusting

and inflexible operating mechanism

etc.

comprehensive improvement of the 220 kV GW10-220 type isolating switch is conducted according to the practical conditions and its structure.The finger-contact disk structure is changed into soft connection structure

the length of coupling inclined plane is extended

the copper roller is renewed

the bevel gear box is reformed and rectified

the mechanism box is upgraded

and so on.The practical application indicates that the reliability of the improved isolating switch is enhanced

and its failure rate drops obviously.