| 307 / | HD | ELECTRICAL TRANSMISSION OR INTERCONNECTION SYSTEMS |
| 43 | DF | PLURAL SUPPLY CIRCUITS OR SOURCES {14} |
| 52 | ![]() | .~ Load current control {4} |
| 53 | DF | .~.~> Load current division {3} |
| 60 | DF | .~.~> Constant load or current {1} |
| 62 | DF | .~.~> Load-limiting |
| 63 | DF | .~.~> Serially connected sources |