IR class WAG-5
| IR class WAG-5 | |
|---|---|
 WAG-5HA 23431 in the usual paint
|
|
| Numbering: | WAG-5B: 1 21100-21138 WAG-5B: 21139-21153 WAG-5A: 23000–23275
WAG-5A / 5: 2 23275–23355
WAG-5: 3 23356–23800 WAG-5HB: 24001–24075
1 first WAM-4B |
| Number: | 1196 |
| Manufacturer: | CLW , Bharat Heavy Electricals (BHEL) |
| Year of construction (s): | 1978-1998 |
| Retirement: | 2019– |
| Axis formula : | Co'Co ' |
| Gauge : | 1676 mm |
| Length over coupling: | 19,974 mm |
| Height: | 4,162 mm |
| Width: | 3,055 mm |
| Bogie axle base: | 3,810 mm |
| Wheel set mass : | 19.8 t |
| Top speed: | 80 km / h, some 100 km / h |
| Hourly output : | 4,360 PS (3,200 kW) |
| Continuous output : | 3,850 hp (2,830 kW) |
| Starting tractive effort: | 33.5 t (330 kN) |
| Wheel diameter: | 1,092 mm |
| Power system : | 25 kV 50 Hz ~ |
| Power transmission: | 2 single arm pantographs type Faiveley AM-12 |
| Number of traction motors: | 6 × Alstom / CLW TAO 659 (hour: 798 hp (587 kW) at 750 V, 840 A to 1070 min -1 Weight:. T 2.8) 6 × Hitachi HS15250A |
| Transmission ratio: |
Alstom motors: 1: 3.95, 1: 4.13 or 1: 4.53 Hitachi motors: 1: 3.55 |
| Locomotive brake: |
Resistance brake , direct brake handbrake |
| Train brake: | Vacuum brake , air brake |
The WAG-5 is an electric locomotive of Indian Railways for operation with 25 kV alternating current with a frequency of 50 Hz, which was built in the years 1983 to 1998 by Chittaranjan Locomotive Works (CLW) in cooperation with Bharat Heavy Electricals (BHEL) has been. The designation of the series consists of W for wide ' Breitspur ', A for alternating current 'Alternating current' and G for goods 'Güter' for freight locomotives . A 5 follows the hyphen to identify the 5th generation of WAG locomotives.
The WAG-5 was with 1196 built locomotives, the most built series of Indian electric locomotives until the successor series WAG-7 was built in even larger numbers. The successful WAG-5 is based on the well-proven WAM-4 and was itself the basis for the successor series WAG-7 and the DC locomotive WCM-6 . With the introduction of the freight locomotives with three-phase drive of the WAG-9 and WAG-12 series , the WAG-5 were pushed into the light passenger train service. The locomotives will be decommissioned and scrapped in large numbers from 2019.
history
The existing freight locomotives were the WAG-1 , WAG-2 , WAG-3 and WAG-4 series , which were considered failures. All series used mono- motor bogies in which a single drive motor per bogie drove the two axles via a gearbox. Due to the better utilization of the coefficient of friction, this design should produce the same tractive forces as a locomotive with a single axle drive with lighter equipment . However, the necessary torque could not be accommodated in a single motor per bogie, even if it was considerably larger than the motors of the drive mechanism . The locomotives therefore had too little tractive effort, which was particularly noticeable on inclines, so that double traction was necessary, which in turn meant that fewer locomotives were available for the same number of trains.
In contrast to the already existing freight locomotives, the six-axle locomotives of the WAM-4 series were extremely successful in freight train service right from the start, although they were designed as universal locomotives . This meant that the production of the WAG-4 was stopped immediately and only WAM-4 locomotives were built. By changing the gear ratio, a series of 40 locomotives was created in 1978, which had a higher tractive power and were therefore especially suitable for freight transport. The locomotives were first designated as WAM-4B, but were so successful that they became a separate series, which was designated as WAG-5.
technology
The WAG-5 is essentially a WAM-4 locomotive with a modified gear ratio.
The current is fed from the pantographs to the transformer via a main compressed air switch. This consists of an autotransformer , the output voltage of which can be changed with a high-voltage tap selector, and a galvanically isolated transformer with a fixed transformation ratio, both of which are mounted on the same iron core in an oil tank. The output current of the transformer is fed to the two rectifier blocks, which convert the alternating current into direct current. This is fed to the six traction motors via smoothing throttles and reversing switches , which are permanently connected in parallel. Field weakening is used in the top speed steps .
As with the WAM-4 locomotives, the asymmetrical trimount bogies developed by the American Locomotive Company (ALCo) were used with a cast frame, such as were first used on the WDM-2 series diesel locomotives . The TAO 659 traction motors developed by Alstom were manufactured by CLW under a technology transfer agreement . Problems in production meant that locomotives with Hitachi HS15250 engines were also delivered under the series designation WAG-5H , which were also manufactured in the CLW under a technology transfer agreement. In addition, some TAO traction motors based on the Alstom design were equipped with Hitachi traction motor bearings. This design was called TAOchi.
variants
As with the WAM-4 is available at the WAG-5, a number of variants whose name had mostly not official, but only by the operating plants were used by the locomotives with different properties in their inventory better to keep them apart. The most important abbreviations are:
- A for Alstom traction motors
- H for Hitachi traction motors
- HA for high adhesion 'high coefficient of friction' for locomotives that are equipped with bogies, which can utilize a higher coefficient of friction and thus exert greater tractive forces
- P for passer-by 'travelers', locomotives for passenger train traffic, mostly without suction air brakes , with gear ratios for 100 km / h and TAOchi traction motors
- HB for locomotives with Hitachi traction motors manufactured by BHEL.
painting
The usual paint was maroon with a yellow band and yellow flashes on the forehead. In this series, too, the paintwork of some of the depots was changed, especially on locomotives that were used for passenger trains. Some locomotives also had the 'Barbie doll paint' in silver, red and blue.
