Force - power - strength

3. Translate into English:

1) The big pumping stations (stations, facilities, plants) for irrigation purposes to be supplied (provided) with elctrical energy can be connected to the power lines (mains; big: pipe) without any troubles (difficulties, easily, effortlessly).

2) The circuit (switching/wiring arrangement) used for transformers depends (is dependent) on the use (application, usage, utilization).

3) By increasing phase angle the power to be achieved (reached, aimed at) is diminished (decreased, reduced) -- the machines and devices aren't completely harnessed (utilized).