WCAM-3
| WCAM 3 | |||||||||||||
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| Type and origin | |
|---|---|
| Power type | Electric |
| Builder | Bharat Heavy Electricals Limited |
| Total produced | 53 |
| Specifications | |
|---|---|
| Configuration: |
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| • UIC | Co'Co' |
| Gauge | 5 ft 6 in (1,676 mm) |
| Electric system(s) |
25 kV 50 Hz AC AC 1.5 kV DC |
| Current source | Pantographs one each for AC and DC |
| Performance figures | |
|---|---|
| Maximum speed | 105 km/h (65 mph) DC, 120 km/h (75 mph) AC |
| Power output | 4,600 hp (3,400 kW) DC 5,000 hp (3,700 kW) AC |
| Career | |
|---|---|
| Operators | Central Railways |
| Numbers | Starting from 21881-900 /21931-963 |
| Locale | Central Railways (Kalyan) |
WCAM 3 is a class of locomotives used in the Indian Railways system. They are the third of the WCAM series. They were specifically designed for use by Central Railways in the Ghat section towards Pune. They usually work on Mumbai CST - Igatpuri - Itarsi or Mumbai CST - Pune but not beyond that because of the unavailability of maintenance facilities.
The WCAM 3 class locomotives are in service in the Mumbai region’s Central Railway zone. The dual-voltage WCAM series locomotives haul intercity trains out of Mumbai DC suburban region on Central Railways which is on a 1500V DC overhead system, as opposed to other parts of India which have 25000 V AC overhead.
With Central Railways progressively moving towards a complete changeover from DC to AC traction, trains leaving Lokmanya Tilak Terminus have started using pure AC engines [1] although WCAM engines still serve trains operating out of Lokmanya Tilak Terminus.
These upgraded dual-traction models deliver 4600 hp in DC mode and 5000 hp in AC mode, and were jointly developed by RDSO and BHEL in 1997. Components are shared with the WCAG-1 locos (see below). Co-Co fabricated bogies (High-Adhesion—shared with WCAG-1, WAG-7, WDG-2, etc.) with secondary suspension. Monocoque underframe. Air brakes are original equipment. They were originally manufactured under a BOLT (build-own-lease-transfer) contract with BHEL, and are probably still owned by BHEL rather than by IR.
Monocoque underframe. Axle-hung, nose-suspended, force ventilated, taper roller bearings Speed control by tap changers in AC mode and resistance notching in DC mode. Motors can be placed in different series-parallel combinations. Auxiliaries from Elgi, S F India, Best, Gresham & Craven, etc. Static converter from ACEC for auxiliary supply.
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