Indian locomotive class WCAM 2/2P

WCAM-2/2P
A WCAM-2 hauling Rajdhani Express
Type and origin
Power type Electric
Builder Bharat Heavy Electricals Limited
Total produced 20
Specifications
Configuration:
 ​
 • 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 pickup(s) Pantographs one each for AC and DC
Performance figures
Maximum speed 80–100 km/h (50–62 mph) DC, 120 km/h (75 mph) AC, Test run 135 km/h (84 mph)
Power output 3,780 hp (2,820 kW) DC
4,720 hp (3,520 kW) AC Continuous
4,950 hp (3,690 kW) Starting
Tractive effort 26,000 kgf (250,000 N; 57,000 lbf) DC
33,400 kgf (328,000 N; 74,000 lbf) AC
Career
Operators Indian Railways
Numbers Starting from 21861 to 21880
Nicknames "Balwant" for No.-21861
Locale Western Railways and Central Railways
WCAM 2P engine at Vadodara Junction

WCAM-2 was a class of locomotives used in the Indian Railways system. They were the second of the WCAM series. They used the same motors as WCAM 1 but with different circuitry and gearing. They were in operational in routed around Mumbai. MU operation was possible with 3 units. WCAM-2P the passenger oriented version of WCAM-2 class. However they perform better than WCAM 1 series. Same as WCAM 1 class they also perform poorly in DC mode compwered to AC mode. They were also used for hauling trains away from the DC section of suburban trains to AC section and perform the same task as the WCAM-1 do. .WCAM-2 locos had the same traction motors, as the WCAM-1 locos, but different circuitry and gearing. The bogies were somewhat different from those of the WCAM-1 being fabricated trimount Co-Co bogies with secondary suspension. Rated speed 105 km/h in DC mode and 120 km/h in AC mode. (In trials by RDSO th loco said to had been run at speeds up to 135 km/h in AC mode). Almost all of these were dual-braked, but a few were equipped with air brakes only. All the WCAM-1's and -2's were homed at Valsad shed in Gujarat. Many of CR's WCAM-2 locos were not used much in DC zones (exceptions were the CR / Bombay Port Trust's Wadala marshalling yard a portion of which has DC traction, and for hauling the Punjab Mail in the late 1970s) as they delivered very poor performance in DC mode and on CR's heavy grades. Although these locos had the same traction motors as the WAM 4 and WCAM 1, the power output from the WCAM-2 locos higher than for the WAM-4 and WCAM-1 because in those models the traction motors were underfed (3460kVA transformer in contrast to the 5400kVA transformer for WCAM-2) and do not yield their potential maximum power. Under AC traction, the WCAM-2 locos operate with all six motors in parallel (th has been enforced by modifications to these locos), while in DC mode they also operate in the all-series and series-parallel (2S 3P, i.e., three series-pairs of motors in parallel) configurations. Recent WCAM-2's from BHEL, including the passenger-specific version WCAM-2P, were rated 2900 hp in DC mode and 4700 hp in AC mode (max. speed 120 km/h in AC mode). These were used by WR and CR for fast trains, running at up to 120 km/h. CR had tried the WCAM-2 and WCAM-2P units but found them usable only with speed restrictions. Some WCAM-2P units had only air brakes. With the WCAM-2 locos, MU operation was possible with up to 3 (4?) units. Some (all?) of the WCAM-2 locos were originally leased to IR, ownership remaining with BHEL, the manufacturers.

Technical specifications[1]

Manufacturers Bharat Heavy Electricals Limited
Traction Motors TAO 659 (575 kW (771 hp), 750 V). Axle-hung, nose-suspended, force-ventilated.
Gear Ratio 62:15, 58:21
Transformer BHEL 5400 kVA.
Rectifiers Two silicon rectifier units D1800N44 (Siemens), 16 cells per bridge. 1000 V / 3600 A
Axle load 18.8 t (18.5 long tons; 20.7 short tons)
Bogies Co-Co trimount fabricated bogies with secondary suspension.
Pantographs Stone India AM-12 (AC) and Stone India AM-18B (DC)
Notches Total 32
Weight 113 t (111 long tons; 125 short tons)
Length 20,950 mm (68 ft 8 3⁄4 in)
Total wheelbase 15,698 mm (51 ft 6 in)
Brakes Vacuum and/or Air

Sheds holding WCAM 2/2P engines

These locos were held at the Valsad loco shed and the Kalyan loco shed.

Trains hauled by WCAM-2/2P

  1. Barmer Yeshvantapur AC Express
  2. Pune Ahmedabad Duronto Express
  3. Mumbai Pune Intercity Express
  4. Bandra Terminus Muzaffarpur Avadh Express
  5. Deccan Queen
  6. Pragati Express
  7. CSMT Kolhapur - Ahmedabad Express
  8. CSMT Kolhapur - Mumbai Sahyadri Express
  9. Deccan Express

See also

References

  1. ↑ WCAM-2 at Indian Railways Fan Club
  • "[IRFCA] Indian Railways Locomotive Roster Kalyan (KYN) WCAM-2 21861 Show". irfca.org. Retrieved 2014-05-30.
  • "[IRFCA] Indian Railways FAQ: Locomotives -- Specific classes : DC & Dual Current Electric". irfca.org. Retrieved 2014-05-30.
  • "WCAM2". trainweb.org. Retrieved 2014-05-30.
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