| 218 / | HD | HIGH-VOLTAGE SWITCHES WITH ARC PREVENTING OR EXTINGUISHING DEVICES |
| 1 | DF | ARC PREVENTING OR EXTINGUISHING DEVICES {14} |
| 43 | DF | .~ Air-current blowout {18} |
| 68 | DF | .~.~ Sealed chamber {10} |
| 69 | DF | .~.~.~ Plural switch connected in series {1} |
| 70 | ![]() | .~.~.~.~ Hybrid-type |