The WAG-9 is a type of electric locomotive used by the Indian Railway It was the most powerful freight locomotive of its fleet until the formal induction of the WAG-12. It is similar to the WAP-7 class locomotive but features a different gear ratio, which makes it suitable for heavy freight operations. In November 1998, the Chittaranjan Locomotive Works (CLW) started producing these with indigenous components. The first of which, named Navyug (New Era), was produced on 14 November 1998. Like the WAP-5 units, the WAG-9 has GTO thyristor converters and three-phase asynchronous motors.

WAG-9/9H
Lalaguda based WAG9s
Type and origin Power type Electric Designer ABB Group Builder Chittaranjan Locomotive Works, Electric Locomotive Works (Bhusawal), Bharat Heavy Electricals Limited, Diesel Locomotive Works Build date 1996 - present Total produced 1840 as of June 2020
Specifications Configuration: ​  • UIC Co′Co′ Gauge 5 ft 6 in (1,676 mm) Bogies Adtranz Fabricated Flexicoil IV Wheel diameter New:1,092 mm (3 ft 7 in), Half worn:1,054 mm (3 ft 5 1⁄2 in) Full worn:1,016 mm (3 ft 4 in) Wheelbase 15.7 m (51 ft 6 in) Length 20.562 m (67 ft 5 1⁄2 in) Width 3.152 m (10 ft 4 1⁄8 in) Height 4.525 m (14 ft 10 1⁄8 in) Axle load WAG-9 : 20.5 tonnes (20.2 long tons; 22.6 short tons) WAG-9H/Hi/9i : 22.0 tonnes (21.7 long tons; 24.3 short tons) Loco weight WAG-9 : 123 tonnes (121 long tons; 136 short tons) WAG-9H/9Hi/9i : 132 tonnes (130 long tons; 146 short tons) Electric system/s 25 kV 50 Hz AC Overhead Current pickup(s) dual pantographs Traction motors WAG-9/9H/9i : Adtranz 6FRA6068 MU working 2 Loco brake Air and Regenerative Train brakes Air Safety systems Slip/slide control, Main overload relay, Over voltage relay, No volt protection, Vigilance Control Device, Fire Detection Equipment, Fire Extinguishers and Earth fault relay
Performance figures Maximum speed 120 km/h (75 mph) Power output 6,122 hp (4,565 kW) continuous Tractive effort Starting : 475 kN (107,000 lbf) (WAG-9), 510 kN (110,000 lbf) (WAG-9H/i/Hi) Continuous : 325 kN (73,000 lbf) at 50 km/h
Career Operators Indian Railways Numbers Starting from 31000-31999, 32000+ & 90001+ CLW 34001+ BHEL 41000+ DLW Nicknames NAVYUG, NAVJYOTI, NAVDISHA, NAVSHAKTI, NAVODAY, NAVASHA, NAVGHANSHAKTI, Dr. SILVER, NAVSHATAK, NAVPRAGATI, NAVSHAKTI NAVEEN, ASHOK & KAVIGURU Locale All Over India Disposition active

Newer versions of the WAG-9 feature full Insulated-gate bipolar transistor (IGBT) traction control; the debut model was the WAG-9 31248. The class as a whole is denoted by the WAG-9i prefix in its model number, although there is a technical variant of this class named WAG-9H, with the "H" meaning "Heavy".

The WAG-9H/9Hi locomotives are the second heaviest in regular service in India, the only freight-dedicated three-phase AC locomotives in the country, and the only electric locomotives in India fitted with IGBT. They are also the freight locomotives with the highest operational speed in India.