Indian locomotive class WCM-3

1,182 mm (3 ft 10+1⁄2 in) and
Full worn: 1,114 mm (3 ft 8 in)Wheelbase2,426 mm (8 ft 0 in)Length:
​ • Over couplers19.583 m (64 ft 3 in) • Over body18.313 m (60 ft 1 in)Width3.199 m (10 ft 5+15⁄16 in)Height4.264 m (13 ft 11+7⁄8 in)Frame type3-Axle Cast Steel frameAxle load19.11 tonnes (18.81 long tons; 21.07 short tons)Loco weight113.00 tonnes (111.22 long tons; 124.56 short tons)Sandbox cap.24 sandboxes, each with 63.5 Kg capacityPower supply110 V DCElectric system/sBefore conversion: 3.0 kV DC Overhead
After conversion: 1.5 kV DC OverheadCurrent pickup(s)PantographTraction motorsHitachi HS-373-AR-16 ​ • Rating 1 hour330A • Continuous231AGear ratio16:51MU workingNot possibleLoco brakeAir/HandTrain brakesVacuumCompressor7.00 kg/cm²Safety systemsSlip man Control, Over voltage relay, No volt relay, Low pressure governor
Performance figures
Maximum speed120.7 km/h (75 mph)
Power output:
​
 • StartingMax: 3,610 hp (2,690 kW)
 • 1 hourMax: 3,610 hp (2,690 kW)
 • ContinuousMax: 2,460 hp (1,830 kW)
Tractive effort:
​
 • Starting28,200 kgf (280 kN)
 • 1 hour16,900 kgf (170 kN)
 • Continuous10,220 kgf (100 kN)
Factor of adh.25
Career
OperatorsIndian Railways
ClassEM/3
Numbers20073-20076
LocaleEastern Railways (1958-1961)
Central Railways (1961-1995)
Delivered1958
First runER: 1958
CR: 1961
Last runJanuary 1995
RetiredMarch 1995
ScrappedAfter 1995
DispositionAll scrapped

The Indian locomotive class WCM-3 was a class of 3 kV DC, later 1.5 kV DC electric locomotives that were developed in 1958 by Hitachi for Indian Railways. The model name stands for broad gauge (W), Direct Current (C), Mixed traffic (M) engine, 3rd generation (3). They entered service in 1958. A total of 3 WCM-3 locomotives were built in Japan in 1958.

The WCM-3 served both passenger and freight trains for nearly forty years. With the introduction of more modern types of locomotives and 25 KV AC electrification, all three were withdrawn in the mid-1990s after repeated failures, and were subsequently scrapped.

History

The history of WCM-3 begins in the late 1950s with the stated aim of the Indian Railways (IR) to remove steam locomotives working on the Eastern Railway (ER) after recommendation of Karnail Singh Fuel Committee.[1][2] In the late 1950s the Kolkata Suburban Railway was established and electrified with overhead 3000 V DC supply.[3] So Indian Railways began to look at various designs.

Initially, Indian railways invited tenders to build locomotives to the new specification. The following responses were received:

  • Hitachi submitted their model with Co-Co bogies, 3600 horsepower rating, and a top speed of 105 km/h.
  • Vulcan Foundry and English Electric submitted a similar model with 3120 hp and a top speed of 105 km/h.

Each company submitted their prototypes and Indian Railways designated these prototypes as the WCM-3 class and WCM-2 class respectively.[4]

Indian Railways decided to procure three 3000 V DC electric locomotives from Hitachi. They are manufactured in Japan and shipped to India in 1958, where they were initially designated as the class EM/3. These locomotives were the third mixed-traffic electric locomotives to roam in India and also had the now-common Co-Co wheel arrangement.[5] They were easily recognizable with their smaller size and separate light enclosures for the marker lights and the tail lamps (just above the buffers). They had their cab doors placed near the cab unlike the WCM-1 class.

The WCM-3 were first used on trains in the Kolkata suburban section, painted in a black livery with a red lining in the middle.[6] Their initial role, however, was short-lived, as by 1960 the Kolkata Suburban Railway was converted to 25 kV AC, rendering the relatively new WCM-3s unusable. The Research Design and Standards Organisation (RDSO) decided to convert the WCM-3 locomotives to run on the 1500 V DC power supply used in Central Railway (CR) without loss of power.

After their transferal to Central Railways in 1961, the WCM-3 locomotives were used on many express trains, but had some problems and were relegated to hauling low speed passenger trains, shunting and freight duties only. In the mid 1990s Central Railways decided to withdraw these locomotives from service and all 3 units were scrapped with none preserved.[citation needed]

Former sheds

All the locomotives of this class has been withdrawn from service.

See also

References

  1. ^ "Report of the expert Committee on Coal Consumption on Railways, 1958". INDIAN CULTURE. Retrieved April 29, 2020.
  2. ^ Gudgin, D.S.E. (1976). Vulcan Foundry Locomotives 1832–1956. Truro: Bradford Barton. ISBN 978-0-85153-215-8.
  3. ^ History of EMU on Eastern Railway and South Eastern Railway, South Eastern Railway, 27 November 2018
  4. ^ "[IRFCA] Indian Railways FAQ: Locomotives - General Information - I". www.irfca.org. Retrieved April 18, 2020.
  5. ^ "Refer pg 260" (PDF).
  6. ^ Express train in India with commuters in the doorways, 1960's. Archive film 61232, retrieved May 21, 2020
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Diesel
Mixed type
Passenger
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Shunting
DC electric
Mixed type
Passenger
Goods
AC electric
Mixed type
Passenger
Goods
Dual (AC and DC)
electric
Mixed type
Goods
Dual mode
Passenger