Modular infusion set with an integrated electrically powered functional component

Infusion set for administering a medicament delivered by an infusion pump (30) which can be carried separately from the infusion set, a) the infusion set comprising a disposable part (1), a reusable part (2), and an electrically powered functional component (7, 8), b) the disposable part (1) comprising: b1) an adhesive underside for attachment at an infusion site on a person's skin, b2) a single lumen infusion cannula (11) which projects from the underside and is the only skin piercing or penetrating element of the infusion set, b3) a first connector (15) for fluidically connecting the cannula to the infusion pump, b4) and a second connector (16), c) and the reusable part (2) comprising: c1) an energy source (21) for electrically powering the functional component (7, 8), c2) and a third connector (26) mating with the second connector (16) of the disposable part (1) to interconnect the disposable part (1) and the reusable part (2), d) wherein the reusable part (2) is in the interconnected state fluidically isolated from the disposable part (1); e) and wherein the disposable part (1) comprises a feeding line (4) fluidically connecting an upstream end of the first connector (15) with a downstream end of the cannula (11) to feed and deliver the medicament via the disposable part (1) and bypass the reusable part (2).