The mb, from Ormazabal, is an associated type Compact Equipment Assembly to be installed in Prefabricated Transformer Substations or in housings constructed to be Transformer Substations, in public or private distribution networks up to 36 kV.
It consists of two Feeder and one Fuse Protection cubicles (RMU), one Transformer, 1 Low Voltage Board and the respective interconnections and auxiliary elements, all placed on a frame.