Indian locomotive class WAG-5

The Indian locomotive class WAG-5 is a class of 25 kV AC electric locomotives that was developed in 1978 by Chittaranjan Locomotive Works for Indian Railways. The model name stands for broad gauge (W), alternating current (A), goods traffic (G) engine, 5th generation (5). They entered service in 1980. A total of 1196 WAG-5 were built at CLW and BHEL between 1978 and 1998, which made them the most numerous class of mainline electric locomotive until the introduction of its successor, the WAG-7.

WAG-5
Arakkonam based WAG-5 twins at Avadi.
Type and origin Power type Electric Builder Chittaranjan Locomotive Works (CLW), Bharat Heavy Electricals Limited (BHEL). Build date Original: 1978–1998 WAG-5A: 1983–1988 WAG-5B: 1978–1983 Total produced 1196
Specifications Configuration: ​  • UIC Co′Co′ Gauge 5 ft 6 in (1,676 mm) Bogies ALCO Asymmetric cast frame trimount Wheel diameter New: 1,092 mm (3 ft 7 in) Half worn: 1,055 mm (3 ft 5+1⁄2 in) Full worn: 1,016 mm (3 ft 4 in) Length 17.162 m (56 ft 3+11⁄16 in) Width 3.055 m (10 ft 1⁄4 in) Height 1.997 m (6 ft 6+5⁄8 in) Axle load 20 tonnes (20 long tons; 22 short tons) Loco weight 119 tonnes (117 long tons; 131 short tons) Electric system/s 25 kV 50 Hz AC Overhead Current pickup(s) Pantograph Traction motors Alstom TAO 659/Hitachi HS15250A MU working 4 Loco brake Air/Hand Train brakes Air, Dual and Vacuum Safety systems Slip control, Main overload relay, Over voltage relay, No volt relay, Earth fault relay, Low pressure governor, Train parting alarms, Vigilance Control Device(VCD) and Brake cylinder cutoff valve
Performance figures Maximum speed 105 km/h (65 mph) 100 km/h (62 mph) 80 km/h (50 mph) Power output Continuous: 3,850 hp (2,870 kW) Tractive effort: ​  • Starting 37,500 kgf (370 kN)  • Continuous 33,600 kgf (330 kN) Factor of adh. 0.29
Career Operators Indian Railways Numbers 21100–21153, 23000–23999, 24000–24075, 24401-24466 Nicknames Krishnaveni, Navdoot, Minkalan, Pasumai, Priyadarshini, Basanti, Srilata, Nouvion, Gurudev, Chetak, Nasbandhi, Janmashati, Ajay, Kirtimaan, Cheetah Locale All over India Disposition active

The WAG-5 is one of the most successful locomotives of Indian Railways currently serving both freight and passenger trains for over 43 years. This class provided the basic design for a number of other locomotives, like WAG-7 and the WCM-6. However, with the advent of new 3-phase locomotives like WAG-9 and WAG-12, the WAG-5 locomotives were relegated to hauling smaller passenger trains and now the aging fleet the WAG-5 locomotives are rapidly being withdrawn from mainline duties and scrapped.

History

WAG-5A is the one with Alstom traction motors. WAG-5B is a converted WAM-4. WAG-5H(x) is with Hitachi traction motors. WAG-5P(x) is a passenger dedicated class. WAG-5(x)D are fitted with dual brakes and WAG-5(x)E are fitted with air brakes. WAG-5RH and WAG-5HR are fitted with Rheostatic or Friction braking. Another variant is WAG-5HG. The units with additional '6P' markings have all parallel grouped traction motors. WAG-5HB is built by BHEL. Some units are fitted with Static Converter (STC), Microprocessor, Dynamic brake resistors (DBR) and SI unit. Due to the advent of WAG-7 and WAG-9, these locos except WAG-5HA/HB are even used for passenger trains although it is a freight-dedicated locomotive. WAG-5HB is homed at Jhansi shed near BHEL's installations for maintenance purposes. WAG-5 has a shell of the WAM-4. Units numbered till 23293 have side louvre and round glass windows like the WAM-4 and units after 23293 have WAG-7 style of Louvre for better ventilation. Recently, WAG-5 have been fitted with data loggers. Unit numbered 23026 was selected by RDSO for adoption of thyristor controlled electricals in 1995. This was done due to the loss of suppliers of tap changer control. Project began in 1992. The new prototype system built in collaboration with Bhabha Atomic Research Centre was fitted in the locomotive between 1997 and 1998. However, due to several problems like interference with signalling equipment, the project was ceased in 1999. The engine was rebuilt to original WAG-5 and designated as WAG-5P.

WAG-5 idling at the Ammuguda Bye pass line

Technical specification

Traction Motors	Alstom TAO 659 (575 kW, 750 V, 1070 rpm) or TAO 656; or Hitachi HS 15250A. Axle-hung, nose-suspended. Six motors.
Gear Ratio	62:16 or 62:15 with Alstom motors, some 64:18 (Hitachi motors), many now 58:21 for mixed use. There are also 17:77
Transformer	BHEL, type HETT-3900. 3900 kVA, 22.5 kV, 182 A. 32 taps, 11730 kg, Forced oil cooling, 'A' Insulation.
Rectifiers	Silicon rectifiers (two) using 64 S-18FN-350 diodes each from Hind Rectifier. 2700 A / 1050 V per cubicle. 64 cells per bridge. Starting current at 3300 A. Motor (380 V, 970-1460 RPM)
Max Haulage capacity	2375 t (WAG-5 original)
Pantographs	Two Faiveley AM-12 of 285 kg with four insulators
Current Ratings	1100 A / 10 min, 750 A continuous
Sandboxes	8
Auxiliaries	2 Head lights (32 V, 250 W), Lead-acid Battery (50 cells, 110 V)
3 Elgi Compressors	3 motors (12.5 hp, 380 V)
2 SF India Ltd. Traction Motor blowers	MLBR-42.51-1-H4 type, 2 Siemens Motors (22 kW, 380 V, 41 A, 3000 rpm)
2 SF India Ltd. Smoothing reactor blower	2 motors(3 hp, 380V, 2860rpm)
BHEL Breaking resistor blower	Dy-3423M type, Moto r(532 kW, 70 hp, 325 V, 175 A, 3500 rpm)
2 SF India Ltd. Silicon rectifier blower	Axial type
SF India Ltd. Oil cooler blower	MLBH-60-1-H2 type, 22.2 m/hr, Motor (30 hp, 380 V, 6.6 A, 2865 rpm)
2 Smoothing reactors	SL42 type, 1250 V, 950 A, 0.00718 ohms at 110 °C
BEST & Co. Pvt. Ltd. Oil pump for transformer	Motor (3.3 kW, 380 V, 6.6 A, 2865 rpm)

Locomotive sheds

Zone	Name	Shed Code	Quantity
			WAG-5	WAG-5H
Central Railway	Bhusawal	BSLL	78
Eastern Railway	Asansol	ASNL	3
	Bardhaman	BWNX	19	44
	Jamalpur	JMPD	7	2
East Coast Railway	Visakhapatnam	WATE	51
North Central Railway	Jhansi	JHSE		109
North Eastern Railway	Gonda	GDDX	18
Northern Railway	Lucknow	AMVD	20
Southern Railway	Arakkonam	AJJE		28
	Erode	EDDX		39
	Ernakulam	ERSX		5
South Central Railway	Vijayawada	BZAE	36
South Eastern Railway	Bondamunda	BNDL		2
Western Railway	Ratlam	RTMD		99
West Central Railway	Itarsi	ETD	66
	New Katni Jn.	NKJD		118
Total Locomotives Active as of October 2024			744

See also

• Locomotives of India
• Rail transport in India

External links

• http://www.irfca.org/faq/faq-specs.html#WAG-5
• Electric locomotives in India
• India railway fan club