Additional Electric Locomotive Specifications
Contents
Passenger AC electric loco comparison (WAP series)
See the freight and mixed loco list above as well. IR uses WAG and WAM series locos quite often for passenger trains.
| Locomotive | WAP-1 | WAP-3 | WAP-4 | WAP-5 | WAP-6 |
| Traction Motor | TAO659 | TAO659 | HS15250 | 6FXA7059 | HS15250 |
| HP | 3900 | 3900 | 5000 | 6000 | 5000 |
| Axle weight (t) | 18.80 | 18.88 | 18.80 | 19.50 | 18.87 |
| Total weight (t) | 112 | 112 | 112 | 78 | 113 |
| TE (continuous) | 13.8 | 13.8 | 19.0 | 22.4 | 19.0 |
| TE (starting) | 22.4 | 22.4 | 30.8 | 26.3 | -- |
| Max. Speed | 130 | 140 | 140 | 160 | 160 |
Freight & Mixed AC electric loco comparison (WAG/WAM series)
| Locomotive | WAG-1 | WAG-4 | WAM-4 | WAG-5 | WAG-7 | WAG-9 | WAG-9H |
| Bogie | BB | BB | Co-Co | Co-Co | Co-Co | Co-Co | Co-Co |
| Traction motor | MG1420 | MG1580 | TAO659 | TAO659 | HS15250 | FRA6068/ HS15250 |
FRA6068 |
| Gear Ratio | 1:3.95 | 1:3.95 | 15:62 | 16:62 | 16:65 | 15:77/ 18:64 |
15:77 |
| HP | 2900 | 3150 | 3400 | 3900 | 5000 | 6000 | 6000 |
| TE (Start) (t) | 30 | 30 | 30 | 33.5 | 41 | 47 | 52 |
| TE (Cont.) (t) | 23.7 | 23.2 | 17.6 | 20.6 | 27 | 32 | 32 |
| Max. Speed | 80 | 80 | 100 | 80 | 100 | 100 | 100 |
| Axle Load (t) | 21.3 | 21.9 | 18.8 | 20 | 20.5 | 30.5 | 22.5 |
| Total Weight (t) | 85.2 | 87.6 | 112.8 | 120 | 123 | 123 | 135 |
| Haulage (t) | 1820 | 2000 | 2010 | 2375 | 3010 | 4250 | 4700 |
Acknowledgement: Many thanks to Sujeet Mishra for supplying the freight locomotive data. The passenger loco data is from the Nov. 1997 issue of Indian Railways.
WCAM series AC-DC loco comparison
The Technical Specifications shown below for the WCAM series of locomotives have been compiled from manuals provided by Western and Central Railway. Other sources of information used have been mentioned explicitly below. Compilation by Prakash Tendulkar.
| Locomotive | WCAM-1 | WCAM-2 | WCAM-3 |
| Brakes | Only Vaccum* | Dual, or only air** | Dual, or only air |
| Max. Speed | 100 km/h | 120 km/h | 105 km/h |
| Max. Speed, DC mode | 80 km/h | 105 km/h | 105 km/h |
| Traction Motors | TAO 659 | TAO 659 | HS15250A |
| HP | 3640(AC) 2930(DC)**** |
3780(Cont.) 4950(Start - 2 motors)*** |
5000(AC) 4600(DC) |
| Transformer | 3800kVA | 5400kVA | 5400kVA |
| Bogie | Co-Co casting | Co-Co fabricated with secondary suspension |
Co-Co fabricated with secondary suspension |
| Gear Ratio | 16:61 & 21:58 | 15:62 & 21:58 | 18:64 |
| Motor Combinations(AC) | 3S-2P, 2S-3P | 2S-3P | 2S-3P |
| Motor Combinations(DC) | 6S, 3S-2P | 6S, 3S-2P | 6S, 3S-2P, 2S-3P |
| DC Series notches | 1 - 21 | 1 - 22 | 1 - 22 |
| DC Series-Parallel notches | 22 - 30 | 23 - 32 | 23 - 32 |
| DC Parallel notches | n/a | n/a | 33 - 39 |
| Weak Field operation(DC) | 21st and 30th notches | 22nd and 32nd notches | 22nd, 32nd, 39th notches |
| MU Operation | No | Yes, up to 3 locos | Yes |
| Starting Effort(AC) | 30t | 33.5t | 41t |
| Starting Effort(DC) | 28t | 26t | 26t |
| Loco Length | 20.98m | 20.98m | 20.98m |
Notes:
WCAG1 is a derivative of WCAM3. All specifications are identical, except Gear Ratio of 16:65, and Starting Effort 43.56t in AC and 29.66t in DC mode.
- * : WCAM-1 # 805, 807, 812, 828, 838, 844, 845 and 850 are dual-brake models.
- ** : Some WCAM-2P are air-brake-only models.
- *** : Based on 750V DC 840A continuous, 1100A starting, with 2 motors. Manual did not provide separate figures for AC and DC operation.
- Figures from "Diesel and Electric Locomotives of Indian Railways" by Jal E Daboo, published by the British Overseas Railways Historical Trust (BORHT). (See the section on books for more information.)
Locomotive Acceleration Capabilities
Sujeet Mishra has kindly provided some data from acceleration studies conducted by Indian Railways on locos of different kinds hauling standard passenger rakes.
| All trials conducted with a 24-coach 1430 tonne passenger rake | ||||||
|---|---|---|---|---|---|---|
| Locomotive | 0-110km/h time (sec) | Distance (km) | 0-120km/h time (sec) | Distance (km) | 0-130km/h time (sec) | Distance (km) |
| WDP4 | 1020 | 25.66 | Not possible | N/A | Not possible | N/A |
| WAP4 | 338.3 | 6.85 | 455 | 10.54 | 741.3 | 20.53 |
| WAP5 | 312.1 | 5.981 | 402.7 | 6.884 | 556.2 | 14.24 |
| WAP7 | 240.4 | 4.654 | 303.5 | 6.674 | 393.8 | 9.82 |