[en] A 130 MeV superconducting cw electron accelerator presently under construction is reported here. This accelerator results from a cooperative effort between the Physics Department of the Universitaet Gesamthochschule Wuppertal and the Technische Hochschule Darmstadt. The accelerator henceforth called recyclotron is being installed at the Nuclear Physics Institute at Darmstadt. It will replace the existing low duty factor (< 10^-3) 70 MeV linear accelerator DALINAC which is in operation since 1962 and is still used for single arm high resolution electron scattering experiments. The new accelerator because of its cw beam will allow for coincidence measurements giving a much more detailed insight into nuclear structure as determined from inclusive inelastic electron scattering. In Sect. II a short summary is given of the parameters finally chosen whereas the present status of the construction is presented more in detail. In Sect. III the development of the rf control circuits is described. Results from the first successful operation of the superconducting injector linac are presented in Sect. IV, while Sect. V contains a short outlook on how to complete the construction of the accelerator and on future developments. 6 references, 8 figures, 3 tables