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 |