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 till its successor the WAG-7.

WAG-5
Arakkonam based WAG-5 twins at Avadi.
Type and origin
Power typeElectric
BuilderChittaranjan Locomotive Works & Bharat Heavy Electricals Limited
Build date
  • Original: 1988–1998
  • WAG-5A: 1983–1988
  • WAG-5B: 1978–1983
Total producedWAG-5,A/HA,B/HB: 1196
Specifications
Configuration:
​
 • UICCo′Co′
Gauge5 ft 6 in (1,676 mm)
BogiesALCO 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)
Length17.162 m (56 ft 3+11⁄16 in)
Width3.055 m (10 ft 1⁄4 in)
Height1.997 m (6 ft 6+5⁄8 in)
Axle load20 tonnes (20 long tons; 22 short tons)
Loco weight119 tonnes (117 long tons; 131 short tons)
Electric system/s25 kV 50 Hz AC Overhead
Current pickup(s)pantograph
Traction motorsAlstom TAO 659/Hitachi HS15250A
MU working4
Loco brakeAir/Hand
Train brakesAir, Dual and Vacuum
Safety systemsSlip 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 speed105 km/h (65 mph)/ 100 km/h (62 mph)
or80 km/h (50 mph)
Power outputContinuous: 3,850 hp (2,870 kW)
Tractive effort:
​
 • Starting37,500 kgf (370 kN)
 • Continuous33,600 kgf (330 kN)
Factor of adh.0.29
Career
OperatorsIndian Railways
Numbers21100–21153, 23000–23999 ,24000–24075,24401-24466
NicknamesKrishnaveni, Navdoot, Minkalan, Pasumai, Priyadarshini, Basanti, Srilata, Nouvion, Gurudev, Chetak, Nasbandhi, Janmashati, Ajay, Kirtimaan, Cheetah
LocaleAll over India
Dispositionactive

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.[1] 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.

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 RailwayBhusawalBSL 118
Eastern RailwayAsansolASN 3
BardhamanBWN (D) 22 56
Jamalpur JMP (D) 7 2
South Coast RailwayVisakhapatnamVSKP 60
North Central RailwayJhansiJHS 114
North Eastern Railway Gonda GD (D) 24
Southern RailwayArakkonamAJJ 33
ErodeED (D) 39
ErnakulamERS (D) 5
South Central RailwayVijayawadaBZA 42
South Eastern RailwayBondamundaBNDM 2
Western RailwayRatlamRTM (D) 116
West Central RailwayItarsiET (D) 29
New Katni Jn.NKJ (D) 66 122
Total Locomotives Active as of October 2023[2] 860

See also

References
  1. Indian locomotive specifications
  2. "e-Locos" (PDF).
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