Ziehl-Abegg ECblue radial fans GR50I, 6.0 kW, 4 pcs. on a common frame (Nissen cooling module). Four EC-radial fans (free running wheels, so-called plug fans) from Ziehl-Abegg in Künzelsau, Germany. They sit on a common galvanised base with protective grille on one side. According to the label, this is the Nissens item number. 418965, and the unit probably comes from a cooling module. The type plate indicates: Type: GR50I-ZID.GQ.CR. Year: 2022. Weight: 62 kg per fan. 400V, 50Hz, 2340 rpm, IP55, 6kW