Set Of Spares Of Hmtd Make, Capacity 4.5Kw, 120V, 37.5A Rectifier Cum Regulating Unit [Rru]. Part No. As Follows: 1] Magnetic Amplifier, Part No. C45050 - 1 No. 2] Excitation Transformer Assembly - Part No. C45030 - 1 Nos. 3] Printed Circuit Board Assem Bly - Part No. C45040 - 2 Nos. [One Set Consists Of 3 Items And Quantity 4 Nos.]. [ Warranty Period: 30 Months After The Date Of Delivery ] ]