Impulse withstand voltage requirements for vertical fuse disconnect switches

Within this specification framework, the 12kV vertical fuse switch disconnector insulation structure must be compatible with a 75kV impulse level. Insulators, support components, switch bodies, arc isolation, and grounding structures should all be designed around this value. During the selection phase, it should be verified whether the "lightning impulse withstand voltage" in parameter nhrt40 vertical fuse switch disconnector is listed as 75kV or higher. During the manufacturing phase, the withstand performance of the entire switch and its components under actual lightning impulse models should be verified.