| three-part | dreiteilig |
| three-party conversation | Dreierkonferenz |
| three-path system | Dreiwegebox |
| three-person household | Drei-Personen-Haushalt |
| three-pfennig piece | Dreier |
| three-phase | dreisträngig |
| three-phase A.C. | Dreiphasen-Wechselstrom |
| three-phase A.C. generating set | Drehstromaggregat |
| three-phase a.c. motor | Drehstrommotor |
| three-phase AC | Drehstrom |
| three-phase AC generator | Drehstromgenerator |
| three-phase AC motor | Drehstrommotor |
| three-phase alternating current | Drehstrom |
| three-phase alternating current motor | Drehstrommotor |
| three-phase alternating-current chopper | Drehstromsteller |
| three-phase alternator | Drehstromgenerator |
| three-phase alternators | Drehstromgeneratoren |
| three-phase alternomotor | Drehstrommotor |
| three-phase armature | Drehstromanker |
| three-phase asynchronous generator | Drehstrom-Asynchrongenerator |
| three-phase asynchronous motor | Drehstrom-Asynchronmotor |
| three-phase bank | Drehstromgruppe |
| three-phase bridge | Drehstrombrückenschaltung |
| three-phase bridge circuit | Drehstrombrückenschaltung |
| three-phase bushing | Drehstromdurchführung |
| three-phase carbon-arc lamp | Drehstromkohlebogenlampe |
| three-phase circuit | Drehstromkreis |
| three-phase circuit breaker | Drehstromleistungsschalter |
| three-phase circuit power | Drehstromleistung |
| three-phase commutator | Drehstromkommutator |
| three-phase commutator machine | Drehstromkommutatormaschine |
| three-phase commutator motor | Drehstrom-Kommutatormotor |
| three-phase current | Drehstrom |
| three-phase current furnace | Drehstromofen |
| three-phase current geared motor | Drehstromgetriebemotor |
| three-phase current geared motors | Drehstromgetriebemotoren |
| three-phase current integrator | Drehstromzähler |
