This article includes a list of general references, but it lacks sufficient corresponding inline citations. (June 2019) |
The Indian locomotive class WCAM-2 is a class of dual-power AC/DC series electric locomotives that was developed in 1995 by Bharat Heavy Electricals Limited used in the Indian Railways system. They are the second locomotive from the WCAM class. The model name stands for broad gauge (W), DC Current (C), AC Current (A), Mixed traffic (M) locomotive, 2nd generation (2). They entered service in 1995. A total of 20 WCAM-2 were built at BHEL between 1995 and 1996, which made them the most numerous class of mainline dual-power AC-DC electric locomotive. They use the same motors as WCAM 1 but with different circuitry and gearing. They are operational in routes around Mumbai. MU operation was possible with 3 units. WCAM-2P was the passenger-oriented version of the WCAM-2 class. However, they perform better than the WCAM 1 series.
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 Valsad based WCAM-2 (now transferred to Kalyan) at Vadodara Jn. | |||||||||||||
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Similarly to the WCAM 1 class they also performed poorly in DC mode compared to AC mode. They were also used for hauling trains away from the DC section of suburban trains to the AC section and performed the same task as the WCAM-1 did. WCAM-2 locos had the same traction motors, as the WCAM-1 locos, but different circuitry and gearing. The bogies are 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 the loco is said to had been run at speeds up to 135 km/h in AC mode). Almost all of these were dual-braked, but all are now 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 1990s) as they delivered very poor performance in DC mode and on CR's heavy grades. Although these locos have the same traction motors as the WAM 4 and WCAM 1, the power output from the WCAM-2 locos is higher than for the WAM-4 and WCAM-1 because in those models the traction motors were underfed (3,460 kVA transformer in contrast to the 5,400 kVA transformer for WCAM-2) and did not yield their potential maximum power. Under AC traction, the WCAM-2 locos operate with all six motors in parallel (this 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 2,916 hp (2.174 MW) in DC mode and 4,715 hp (3.516 MW) in AC mode (max. speed 120 km/h (75 mph) in AC mode). These were used by WR and CR for fast trains, running at maximum speed. 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 edit
Source:[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 5,400 kVA. |
| Rectifiers | Two silicon rectifier units D1800N44 (Siemens), 16 cells per bridge. 1 kV / 3.6 kA |
| 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) (past) |
| 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 (past) and/or Air |
Locomotive shed edit
| Zone | Name | Shed Code | Quantity |
|---|---|---|---|
| Central Railway | Kalyan | KYN | 20 |
| Total Locomotives Active as of March 2024[2] | 20 | ||
Trains hauled by WCAM-2/2P edit
See also edit
References edit
- ^ WCAM-2 at Indian Railways Fan Club
- ^ "Listing All Locos - IRFCA Locomotive Database". www.irfca.org. Retrieved 8 March 2024.
External links edit
- "[IRFCA] Indian Railways Locomotive Roster Kalyan (KYN) WCAM-2 21861 Show". irfca.org. Retrieved 30 May 2014.
- "[IRFCA] Indian Railways FAQ: Locomotives -- Specific classes : DC & Dual Current Electric". irfca.org. Retrieved 30 May 2014.
- "WCAM2". trainweb.org. Retrieved 30 May 2014.