Load Break Switches

[Repaired Products] Pole Mounted SF6 Gas Insulated Load Break Switch (Manual Type)   View All Products of this Supplier

As this is higher quality level than IS, an Interrupter Switch, generally used in other countries, This is perfectly replaceable to IS.
For your reference, IS had been used until 1970s in South Korea, however, since 1980s gas switch(Manual /
Automatic type) has been used, so far.