4.5Kw and 25 Kw Alternator including rectifying – cum- regulating Equipment for 110VDc train lighting system used for self generating coaches for Indian railways Specification no. RDSO/PE/SPEC/TL/0054-2003(Rev-0) with Amendment no. 1&2.
The three phase ac supply generated by alternator is rectified and regulated by Rectifier cum Regulator Unit (RRU)/Electronic Rectifier cum Regulator Unit (ERRU). This regulated DC supply is used for charging batteries and fed to coach for electrical loads.