| 218 / | HD | HIGH-VOLTAGE SWITCHES WITH ARC PREVENTING OR EXTINGUISHING DEVICES |
| 1 | DF | ARC PREVENTING OR EXTINGUISHING DEVICES {14} |
| 22 | DF | .~ Magnetic blowout {7} |
| 34 | DF | .~.~ Arc chute {3} |
| 37 | ![]() | .~.~.~ Insulated conductor structure {2} |
| 38 | DF | .~.~.~.~> Arc splitting means |
| 39 | DF | .~.~.~.~> Skew, parallel, or vertical position |