Indian locomotive class WAG-7

Last updated

WAG-7
BZA WAG - 7 (8713346629).jpg
Vijayawada based WAG-7 twins at Secunderabad outer.
Type and origin
Power typeElectric
Builder Chittaranjan Locomotive Works (CLW),
Bharat Heavy Electricals Limited (BHEL).
Build date1990–2015
Total produced1994
Specifications
Configuration:
​
 •  UIC Co′Co′
Gauge 5 ft 6 in (1,676 mm)
Bogies ALCO Fabricated
Wheel diameterNew:1,092 mm (3 ft 7 in),
Half worn:1,055 mm (3 ft 5+1⁄2 in) and
Full worn:1,016 mm (3 ft 4 in)
Wheelbase 3.8 m (12 ft 5+5⁄8 in)
Length20.934 m (68 ft 8+1⁄8 in)
Width3.179 m (10 ft 5+1⁄8 in)
HeightWAG-7 : 4.185 m (13 ft 8+3⁄4 in) [1]
WAG-7H : 4.135 m (13 ft 6+3⁄4 in) [2]
Axle load WAG-7 : 20.5 tonnes (20.2 long tons; 22.6 short tons)
WAG-7H : 22 tonnes (22 long tons; 24 short tons)
Loco weightWAG-7 : 123 tonnes (121 long tons; 136 short tons)
WAG-7H : 132 tonnes (130 long tons; 146 short tons)
Electric system/s 25 kV 50 Hz AC Overhead
Current pickup(s) pantograph
Traction motors WAG-7 : Hitachi HS15250A
WAG-7H : Hitachi HS15250G
MU working 4
Loco brake Air, Hand and Rheostatic (Friction)
Train brakes Air, Vacuum and Dual
Safety systemsSlip control, Main overload relay, Over voltage relay, No volt relay, Earth fault relay, Low pressure governor, Vacuum Control Governor, Train parting alarms and Brake cylinder cutoff valve
Performance figures
Maximum speed105 km/h (65 mph)
Power outputMax : 5,350 hp (3,990 kW)
Continuous : 5,000 hp (3,730 kW)
Tractive effort WAG-7 starting : 48 tons
WAG-7 continuous : 45 tons?
WAG-7H starting : 91 tons?
Factor of adh. 0.345
Career
Operators Indian Railways
NumbersWAG-7 : 27001-27999, 28000-28770, 24501-24700
WAG-7H : 28024 and 28739
NicknamesSHANTIDAN, EKTA, KARAMVIR, GAJRAJ, SWARNABHA, SARVOTTAM, SAMARPAN, CAUVERY, SAMRAT, PRAYAS & AGRASAR
LocaleAll over India
Dispositionactive

The Indian locomotive class WAG-7 is a class of 25 kV AC electric locomotives that was developed in 1990 by Chittaranjan Locomotive Works for Indian Railways. The model name stands for broad gauge (W), alternating current (A), goods traffic (G) engine, 7th generation (7). They entered service in 1992. A total of 1970 WAG-7 were built at CLW and BHEL between 1990 and 2015, which made them the most numerous class of mainline electric locomotive till its successor the WAG-9.

Contents

The WAG-7 is one of the most successful locomotives of Indian Railways currently serving both freight and passenger trains for over 31 years. Even though with the advent of new 3-phase locomotives like WAG-9 and WAG-12, all WAG-7 locomotives except ones destroyed in accidents, are in service and doing all types of duties.

History

The history of WAG-7 begins in the early 1990s with the aim of addressing the shortcomings of the previous WAG-5 class and remove steam locomotives from IR by a target date of 1990. [3] The WAG-5 though were great successes, had become underpowered to meet the growing demands of the Indian Railways. So in early 1990s IR decided to look for a successor the WAG-5 class. The required specification was of a 5000 horsepower locomotive.

Initially, the Indian railways invited tenders to build locomotives to the new specification. The following responses were received:

Each company submitted their prototypes and Indian Railways designated these prototypes as the WAG-7 class and WAG-8 class respectively. [4] Technologically thyristor controlled BHEL WAG-8 was meant to be superior to the WAG-7 which was effectively using tap-changer technology from the 1960s. But due to issues from WAG-8, WAG-7 was selected for mass production.

However, even before the WAG-7 another type of electric locomotive was imported from ASEA in 1988. This locomotive was classified as WAG-6A. However WAG-6As were not selected for mass production because emergence of 3 Phase AC locomotives. [5]

Locomotive sheds

ZoneNameShed CodeQuantity
Central Railway Kalyan KYNE93+35M
Eastern Railway Asansol ASNL78
Bardhaman BWNX5
Jamalpur JMPD12
East Central Railway Pt. Deen Dayal Upadhyaya DDU90
DDUX83
Samastipur SPJD30
East Coast Railway Angul ANGE190
Northern Railway Khanalampura KJGE19
Lucknow AMVD50
North Central Railway Jhansi JHSE77
JHSD55
North Eastern Railway Gonda GDDX80
Southern Railway Erode EDE94
EDDX28
South Central Railway Kazipet KZJD140
Guntakal GTLE180
South Eastern Railway Bondamunda BNDX39
Bokaro Steel City IPTE101
Kharagpur KGPE200
South East Central Railway Raipur RPDX150
Western Railway Vatva VTAD28
Ratlam RTMD40
West Central Railway New Katni Jn. NKJD96
Total Locomotives Active as of June 2024 [6] 1993

• Key : M -> WAG-7M (Formerly known as WCAM-3)

See also

Related Research Articles

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Chittaranjan Locomotive Works (CLW) is an electric locomotive manufacturer based in India. The works are located at Chittaranjan in the Asansol Sadar subdivision of West Bengal, with an ancillary unit in Dankuni. The main unit is 32 km from Asansol and 237 km from Kolkata. CLW has stores and offices in Kolkata, as well as inspection cells in New Delhi, Mumbai, Kolkata, and Bangalore. It is the largest locomotive manufacturer unit in the world, producing 431 locomotives in 2019–20.

<span class="mw-page-title-main">Indian locomotive class WAG-9</span> Indian Railway freight class electric locomotive

The Indian locomotive class WAG-9 is a class of 25 kV AC electric locomotives that was developed in 1995 by ABB for Indian Railways. The model name stands for broad gauge (W), AC Current (A), Goods traffic (G), 9th generation (9) locomotive. They entered service in 1996. A total of 5140 WAG-9 have been built at Chittaranjan Locomotive Works (CLW), with more units being built at Banaras Locomotive Works (BLW), Bharat Heavy Electricals Limited (BHEL) and Patiala Locomotive Works (PLW). It was the most powerful freight locomotive of its fleet until the formal introduction of the WAG-12.

<span class="mw-page-title-main">Indian locomotive class WAG-5</span> Indian Railway class electric freight locomotive

The Indian locomotive class WAG-5 is a class of 25 kV AC electric locomotives that was developed in 1978 by Chittaranjan Locomotive Works for Indian Railways. The model name stands for broad gauge (W), alternating current (A), goods traffic (G) engine, 5th generation (5). They entered service in 1980. A total of 1196 WAG-5 were built at CLW and BHEL between 1978 and 1998, which made them the most numerous class of mainline electric locomotive till its successor the WAG-7.

<span class="mw-page-title-main">Indian locomotive class WAM-4</span> Indian Railway class electric locomotive

The Indian locomotive class WAM-4 is a class of 25 kV AC electric locomotives that was developed in 1970 by Chittaranjan Locomotive Works for Indian Railways. The model name stands for broad gauge (W), alternating current (A), mixed traffic (M) locomotive, 4th generation (4). They entered service in March 1971. A total of 500 WAM-4 were built at CLW between 1970 and 1983, which made them the most numerous class of mainline electric locomotive till its successor the WAG-5.

<span class="mw-page-title-main">Indian locomotive class WCAM-2</span> Indian Railway class AC and DC mix electric locomotive

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.

<span class="mw-page-title-main">Indian locomotive class WDM-4</span>

The Indian locomotive class WDM-4 is a class of diesel-electric locomotive that was developed in 1962 by Electro-Motive Diesel for Indian Railways. The model name stands for broad gauge (W), Diesel (D), Mixed traffic (M) engine, 4th generation (4). They entered service in 1962. A total of 72 WDM-4 locomotives were built between 1961 and 1962.

<span class="mw-page-title-main">Indian locomotive class WCAM-3</span> Indian Railway class AC and DC mix electric locomotive

The Indian locomotive class WCAM–3 is a class of dual-power AC/DC series electric locomotives That was developed in 1997 by Bharat Heavy Electricals Limited used in the Indian Railways system. They are the third locomotives from the WCAM class. The model name stands for broad gauge (W), DC Current (C), AC Current (A), Mixed traffic (M) locomotive, 3rd generation (3). They entered service in 1997. A total of 53 WCAM-3 were built at BHEL between 1997 and 1998, which made them the most numerous class of mainline dual-power AC-DC electric locomotive. They were specifically designed for use by Central Railways in the Ghat section towards Nashik and Pune.

<span class="mw-page-title-main">Indian locomotive class WAP-1</span> Indian Railway class electric locomotive

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<span class="mw-page-title-main">Indian locomotive class WCG-2</span>

The Indian locomotive class WCG-2 is a class of 1.5 kV DC electric locomotives that was developed in the late 1960s by Research Design and Standards Organisation (RDSO) and Chittaranjan Locomotive Works (CLW) for Indian Railways. The model name stands for broad gauge (W), DC Current (C), Goods traffic (G) engine, 2nd generation (2). They entered service in February 1971. A total of 57 WCG-2 were built at CLW between 1978 and 1983, which made them the most numerous class of DC electric locomotive.

The Indian locomotive class WCAG–1 is a class of dual-power AC/DC series locomotives used in the Indian Railways system. They are the only class of the WCAG locomotives. They were specifically designed for use by Central Railways in the Ghat section towards Nashik and Pune.

<span class="mw-page-title-main">Indian locomotive class WCM-6</span> Electric locomotives, developed 1995

The Indian locomotive class WCM-6 is a class of 1.5 kV DC electric locomotives that was developed in 1995 by Chittaranjan Locomotive Works (CLW) for Indian Railways. The model name stands for broad gauge (W), Direct Current (C), Mixed traffic (M) engine, 6th generation (6). They entered service in 1996. A total of 2 WCM-6 locomotives was built at CLW in 1995. Currently they haul only departmental trains and do shunting duties.

The Indian locomotive class WCM-2 is a class of 1.5 kV DC electric locomotives that was developed in 1956 by Vulcan Foundry and English Electric for Indian Railways. The model name stands for broad gauge (W), Direct Current (C), Mixed traffic (M) engine, 2nd generation (2). They entered service in 1957. A total of 12 WCM-2 locomotives were built in England between 1956 and 1957.

The Indian locomotive class WCM-3 is a class of 1.5 kV DC electric locomotives that was developed in 1958 by Hitachi for Indian Railways. The model name stands for broad gauge (W), Direct Current (C), Mixed traffic (M) engine, 3rd generation (3). They entered service in 1958. A total of 3 WCM-3 locomotives were built in Japan in 1958.

The Indian locomotive class WDS-8 is a class of diesel-electric locomotive that was developed in 1979 by the Chittaranjan Locomotive Works for Indian Railways, but ended up being delivered exclusively to the private sector. The model name stands for broad gauge (W), Diesel (D), Shunter (S) engine, 8th generation (8). They entered service in 1979. A total of five WDS-8 locomotives was built at Chittaranjan Locomotive Works (CLW), Chittaranjan between 1979 and 1982.

<span class="mw-page-title-main">Indian locomotive class WAG-1</span>

The Indian locomotive class WAG-1 was a class of 25 kV AC electric locomotives that was imported from Europe in the 1960s for Indian Railways. The model name stands for broad gauge (W), AC Current (A), Goods traffic (G) locomotive, 1st generation (1). A total of 112 WAG-1 were built by The European Group 50 Hz Group/European Group/50 Cycles Group (consortium) between 1963 and 1966. They entered service in 1964.

<span class="mw-page-title-main">Indian locomotive class WAG-4</span> Indian train passenger and freight locomotive/engine class

The Indian locomotive class WAG-4 is a class of 25 kV AC electric locomotives that was manufactured by CLW in the late 1960s for Indian Railways. The model name stands for broad gauge (W), AC Current (A), Goods traffic (G) engine, 1st (1). A total of 186 WAG-4 locomotives were built by The European Group 50 Hz Group/European Group/50 Cycles Group (consortium) between 1967 and 1969. They entered service in 1967.

<span class="mw-page-title-main">Indian locomotive class WAG-6A</span>

The Indian locomotive class WAG-6A is a class of 25 kV AC electric locomotives that was developed in the 1988 by Allmänna Svenska Elektriska Aktiebolaget (ASEA) for Indian Railways. The model name stands for broad gauge (W), AC Current (A), Goods (G) engine, 6th generation (6) First variant (A). They entered service in 1988. A total of 6 WAG-6A were built at ASEA, Sweden between 1987 and 1988. they were the most powerful locomotives in India until the arrival of the WAG-9 class.

The Indian locomotive class WAG-8 is a class of 25 kV AC electric locomotives that was developed in the early 1990s by Bharat Heavy Electricals Limited (BHEL) for Indian Railways. The model name stands for broad gauge (W), AC current (A), freight/goods traffic (G), eighth-generation (8). Only two units of this class were built, both prototypes.

The Indian locomotive class WAP-3 was a class of 25 kV AC electric locomotives that was designed by Research Design and Standards Organization (RDSO) and Chittaranjan Locomotive Works (CLW) for Indian Railways in 1987. The model name stands for Broad gauge (W), AC Current (A), Passenger traffic (P) locomotive, 3rd generation (3). They entered service in 1988. They were the faster variant of the previous WAP-1 class. A total of 9 WAP-3 were converted from existing WAP-1 units at CLW between 1987 and 1988. All locomotives were now withdrawn from service and converted back to WAP-1.

<span class="mw-page-title-main">Indian locomotive class WAG-6B/C</span>

The Indian locomotive class WAG-6B/C is a class of 25 kV AC electric locomotives that was developed in the 1988 by Hitachi for Indian Railways. The model name stands for broad gauge (W), AC Current (A), Goods (G) engine, 6th generation (6) Second/Third variant (B/C). They entered service in 1988. A total of 12 WAG-6 were built at Hitachi, Japan between 1987 and 1988. they along with WAG-6A were the most powerful locomotives in India until the arrival of the WAG-9 class.

References

  1. ↑ "Trainweb WAG-7".
  2. ↑ "Trainweb WAG-7H".
  3. ↑ "Report of the expert Committee on Coal Consumption on Railways, 1958". INDIAN CULTURE. Retrieved 29 April 2020.
  4. ↑ "[IRFCA] Indian Railways FAQ: Locomotives - General Information - I". www.irfca.org. Retrieved 18 April 2020.
  5. ↑ "The WAG Series". 24 Coaches. 30 October 2013. Retrieved 29 April 2020.
  6. ↑ "e-Locos" (PDF).
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