| 307 / | HD | ELECTRICAL TRANSMISSION OR INTERCONNECTION SYSTEMS |
|
| 43 |  | PLURAL SUPPLY CIRCUITS OR SOURCES {14} |
| 44 | DF | .~> One source floats across or compensates for other source {3} |
| 51 | DF | .~> Circulating- or inter-current control or prevention |
| 52 | DF | .~> Load current control {4} |
| 64 | DF | .~> Substitute or emergency source {3} |
| 69 | DF | .~> Sources distributed along load circuit |
| 70 | DF | .~> Load transfer without paralleling sources |
| 71 | DF | .~> Series-parallel connection of sources |
| 72 | DF | .~> Diverse or unlike electrical characteristics {3} |
| 77 | DF | .~> Series-connected sources {1} |
| 80 | DF | .~> Selective or optional sources {1} |
| 82 | DF | .~> Plural converters |
| 83 | DF | .~> Plural transformers |
| 84 | DF | .~> Plural generators |
| 85 | DF | .~> Connecting or disconnecting {1} |