| Subject | English | Portuguese |
| el. | positive component | componente direta |
| el., sec.sys. | positive sequence component of a three-phase system | componente directa de um sistema trifásico |
| earth.sc., el. | positive sequence component | coordenada direta |
| earth.sc., el. | positive sequence component | sistema direta |
| earth.sc., el. | positive sequence component | componente direta |