Indian locomotive class WCM-4
WCM-4 is more powerful version of the WCM-3
A WCM-4 at Bombay Victoria Electric loco trip Shed
Type and origin
Power typeElectric
DesignerHitachi
BuilderHitachi
Order number59/459/1/RS(F)
ModelEM4
Build date18 April 1959
Total produced7
Specifications
Configuration:
​
 • AARC-C
 • UICCo′Co′
 • CommonwealthCo-Co
Gauge5 ft 6 in (1,676 mm)
Bogies3 Axle fabricated frame, Swing bolster with Equalizer beams
Wheel diameterNew:1,220 mm (4 ft 0 in),
Half worn:1,182 mm (3 ft 10+1⁄2 in) and
Full worn:1,144 mm (3 ft 9 in)
Wheelbase2,380 mm (7 ft 10 in)
Length:
​
 • Over couplers20.000 m (65 ft 7+3⁄8 in)
 • Body18.680 m (61 ft 3+7⁄16 in)
Width3.050 m (10 ft 1⁄16 in)
Height4.282 m (14 ft 9⁄16 in)
Frame type3 Axle fabricated frame
Axle load20.83 tonnes (20.50 long tons; 22.96 short tons)
Loco weight125.00 tonnes (123.03 long tons; 137.79 short tons)
Sandbox cap.16 sandboxes each
Power supply110 V DC
Electric system/s1.5 kV DC Overhead
Current pickup(s)pantograph
Traction motorsHS-373-BR ​
 • Rating 1 hour765A
 • Continuous620A
Gear ratio16:73
MU workingNot possible
Loco brakeAir/Hand, Regenerative braking
Train brakesVacuum
Compressor7kg/cm²
Safety systemsSlip control, Over voltage relay, No volt relay, Low pressure governor, Vacuum governor Train parting alarms, and Brake cylinder cutoff valve
Performance figures
Maximum speed120.5 km/h (75 mph)
Power output:
​
 • StartingMax:4,000 hp (2,980 kW)
 • 1 hourMax:4,000 hp (2,980 kW)
 • ContinuousMax:3,290 hp (2,450 kW)
Tractive effort:
​
 • Starting31,250 kgf (310 kN)
 • 1 hour25,300 kgf (250 kN)
 • Continuous18,700 kgf (180 kN)
Factor of adh.0.25
Career
OperatorsIndian Railways
ClassEM/4
Numbers20076-20082
LocaleCentral Railways
Delivered1960
First run1961
Last runJanuary 2000
RetiredEarly 2000s
WithdrawnEarly 2000s
Preservednone
DispositionAll have been scrapped.

The Indian locomotive class WCM-4 is a class of 1.5 kV DC electric locomotives that was developed in 1956 by Vulcan Foundry and English Electric for Indian Railways. The model name stands for broad gauge (W), Direct Current (C), Mixed traffic (M) engine, 4th generation (4). They entered service in 1961. A total of 7 WCM-4 locomotives was built at England between 1956 and 1957.

History

Indian Railways decided to procure 7 locomotives from Hitachi. They are manufactured in Japan and shipped to India in 1957. These locomotives had now common Co-Co wheel arrangement.[1] Initially the WCM-4 class were known as EM/4 class.[2]

See also

References

  1. ↑ "Refer pg 260" (PDF).
  2. ↑ Gudgin, D.S.E. (1976). Vulcan Foundry Locomotives 1832–1956. Truro: Bradford Barton. ISBN 978-0-85153-215-8.
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