Automatic Voltage Regulator (Avr) Type Sd-02 As Per Koel Part No. Dv0.998.01.0.Sp, Suitabl E For Leroy Somer Make Alternator Of Capacity 500 Kva & Alternator Model No. Lstr47.2L In Lhb Power Car Confirming To Rdso Specification Rdso/ Pe/ Spec/ Ac/0084-2008 Rev-1. Material Make Is Koel/ Leroy Som Er. Material Shall Be Procure From The Said Oem Or His Authorized Dealers Or Firm Who Submit Proof Of Purch Ase From Oem/ Dealers With History Of Said Oem?S Material Supply To The Railway. [ Warranty Period: 30 M Onths After The Date Of Delivery ] ]