| 361 / | HD | ELECTRICITY: ELECTRICAL SYSTEMS AND DEVICES |
| 1 | DF | SAFETY AND PROTECTION OF SYSTEMS AND DEVICES {32} |
| 67 | ![]() | .~ Series connected sections with faulty section disconnect {2} |
| 68 | DF | .~.~> With communication between disconnect points {1} |
| 70 | DF | .~.~> Constant current system |