| 307 / | HD | ELECTRICAL TRANSMISSION OR INTERCONNECTION SYSTEMS |
| 43 | DF | PLURAL SUPPLY CIRCUITS OR SOURCES {14} |
| 52 | DF | .~ Load current control {4} |
| 53 | ![]() | .~.~ Load current division {3} |
| 54 | DF | .~.~.~> Serially connected sources |
| 55 | DF | .~.~.~> Fixed or predetermined ratio {3} |
| 59 | DF | .~.~.~> Peak or excess load |