Supply of Universal Type Electronic Rectifier Cum Regulator Unit Erru Of Capacity 4.5Kw / For 4.5 Kw Alternator Suitable For Use On 110 V Dc Train Lighting System With Following Scope Of Supplu 1.Univiersal Type Electrnic Rectifier Cum Regulator Unit Erru Of Capacity 4.5 Kw Confirming To Rdso Specification No So/Pe/Spec/Ac/0013- 2011Rev.3..