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 | DF | .~.~.~ Insulated conductor structure {2} |
39 | .~.~.~.~ Skew, parallel, or vertical position |