Indian locomotive class WAG-9

Indian locomotive class WAG-9

WAG-9 is the name of a type of electric locomotive used in India. It is currently the most powerful locomotive in Indian Railways' fleet. It is very similar to the class WAP-7; The only difference being the gear ratio which makes it suitable for heavy freight operations. In November 1998, CLW started producing these with indigenous components. The first one, 'Navyug' (translated, 'New Era'), was flagged off on Nov. 14. They have (like the WAP-5 units) GTO thyristor converters and 3-phase asynchronous motors.

There is a technical variant of this class named WAG-9H.

Technical specifications

Manufacturers	ABB, CLW
Traction Motors	ABB's 6FRA 6068 (850kW, 2180V, 1283/2484 rpm, 270/310A. Weight 2100kg) Axle-hung, nose-suspended.
Gear Ratio	77:15 / 64:18
Transformer	ABB's LOT 6500, 4x1450kVA.
Power Drive	Power convertor from ABB, type UW-2423-2810 with SG 3000G X H24 GTO thyristors (D 921S45 T diodes), 14 thyristors per unit (two units). Line convertor rated at 2 x 1269V @ 50Hz, with DC link voltage of 2800V. Motor/drive convertor rated at 2180V phase to phase, 971A output current per phase, motor frequency from 0 to 132Hz.
Hauling capacity	4250t
Bogies	Co-Co, Fabricated Flexicoil Mark IV bogies; bogie wheel base 1850mm + 1850mm
Wheel base	15700mm
Axle load	20.5t
Unsprung mass per axle	3.984t
Length over buffers	20562mm
Length over headstocks	19280mm
Body width	3152mmn
Cab length	2434mm
Pantographs	Two Secheron ES10 1Q3-2500.
Pantograph locked down height	4525mm

See also

• Indian Railways
• Indian Locomotives
• Indian Locomotive Class WDM-2
• Indian locomotive class WAP-4
• Indian Locomotive Class WAP-5
• Indian locomotive class WAP-7

External links

• Specifications
• India railway fan club