Indian locomotive class WAG-7
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WAG 7 (new variant) belonging to Electric Loco Shed, Vijayawada
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WAG 7 is the name of a type of electric locomotive used in India. It is the 7th class of Wide Gauge's(W) AC charged(A) and Freight-dedicated(G-Goods) locomotives. Built by Chittaranjan Locomotive Works and BHEL, Jhansi to RDSO specifications. WAG7 is an uprated version of WAG-5 locomotive with high capacity transformer, rectifier, traction motor, compressor and other matching associated equipments. On 3 August 1992, the first WAG-7 locomotive was inaugurated and christened the name 'SHANTIDAN' in honor of Mother Teresa. The loco is controlled by a tap changer. Indian Railway is going to achieve Lua error in Module:Convert at line 1851: attempt to index local 'en_value' (a nil value). of traffic, WAG 7 is the main stay of loco. In the locomotive vehicle market WAG 7 is more economical option and one of the cheapest in the world. Hence, it has the highest production figures of any locomotive in India.
The first 71 of this class initially or still homed at Mughalsarai (MGS) shed and the second was Kanpur(CNB). Some units are retrofitted with Static Converters(STC) instead of Arno Rotary Converters. STCs are more efficient and require less maintenance. Also, STCs have self diagnostics making troubleshooting easier. WAG-7H is a heavy variant of WAG-7. WAG-7H #27061 has thicker under-frames. WAG-7 #27445 has closed-circuit cameras to monitor the pantograph along with a spotlight to illuminate the same at night, green lamps to exchange signals and a single windscreen on either side. New Katni (NKJ) shed has added Overhead Equipment(OHE) monitors. Some WAG-7 units have A.C. cabs, SIV, MPFDCS, MPCS, Single arm pantograph, FDCS, Additional COC, Rear-view mirrors, STS, Daulat Ram's Roof-mounted DBRs, SI, Modified ceilings, Bucket seats, Waist-level headlamps, High-reach pantographs, Vigilance Control Device(VCD), Wireless Multiple Control, Vertical Dynamic Brake Resistor(DBR) and microprocessor control. Some units have their MU cables removed. One unit has SCHUNK pantograph. Some units are assembled at Dahod Workshops. Initially WAG-7 had the body-shell similar to WAG-5 but later on all WAG-7 are/were fitted with WAP-4 shell since this provided more space. WAG-7H have WAP 4 shell since beginning. Older WAG-7s have Tiger Face liveries (Red/Dark Blue on white) but newer WAG-7s by CLW have yellow stripe on blue livery. All BHEL built WAG-7s have Tiger Face livery. Now, even some older WAG-7s are repainted with yellow stripe on blue livery. WAG-7 is India's oldest locomotive to be still in production. It is also the most powerful indigenously designed freight-dedicated locomotive in India. WAG-7H at a continuous speed of 44 km/h (27 mph) has the highest tractive effort of any locomotive in India.
Contents
Technical specifications[3]
Traction Motors | a variant of the standard HS15250 with higher current rating (thicker wire gauge, better insulation); Motors built by CLW and BHEL. 6 motors in parallel grouping |
Traction Motors Class of Insulation for Armature and Field | C |
Traction Motors Suspension | Axle hung and Nose-suspended |
Traction Motors Weight | 3,650 kg (8,050 lb) |
Traction Motors Temperature rise in Armature | 90 degrees Celsius (194 degrees Fahrenheit) |
Traction Motors Temperature Rise in Field | 70 degrees Celsius (158 degrees Fahrenheit) |
Traction Motors Temperature rise in Commutator | 85 degrees Celsius (185 degrees Fahrenheit) |
Traction Motors Coil resistance at 110 degrees Celsius (230 degrees Fahrenheit) of Armature | 0.0126 ohms |
Traction Motors Coil resistance at 110 degrees Celsius (230 degrees Fahrenheit) of Main pole | 0.0117 ohms |
Traction Motors Coil resistance at 110 degrees Celsius (230 degrees Fahrenheit) of Inter pole | 0.0089 ohms |
Traction Motors Continuous rating | 630 kW (840 hp), 750 V, 900 A, 895 rpm |
Traction Motors rating for 1 hour | 670 kW (900 hp), 750 V, 960 A, 877 rpm |
Traction Motors Air gap for Main pole | 6.35 mm (0.250 in) |
Traction Motors Air gap for Inter pole | 10 mm (0.394 in) |
Gear Ratio | WAG-7 : 65:16 and 18:64 and WAG-7H : 65:16 |
Transformer | CCL India, type CGTT-5400, Primary rating (5670 kVA, 252 A) Secondary rating (5400 kVA, 1000V, 5400 A), Tertiary rating 270 V, 32 taps, 12,200 kg (26,900 lb), Forced Oil cooling, Class A Insulation |
Rectifiers | Two silicon rectifiers, cell type S18FN350 (from Hind Rectifier), 64 per bridge, Continuous rating 2700 A / 1050 V per cubicle, Max starting current 3300 A, Forced air cooling |
Pantographs | Two Stone India (Calcutta) type AN-12, 235 kg (518 lb) including 4 insulators |
Bogie drive arrangement | Gear pinion |
Current Ratings | 1350 A/2min, 1200 A/10min, 960 A/hr, 900 A continuous |
Number of sandboxes | 8 |
Permanent shunt | 5% |
2 Headlights | 32 V, 50 W |
Lead Acid batteries | 50 cells, 110 V(5 hour rating) |
Arno Converter Input | 216 kVA, 415 V, 1 phase 520 A |
Arno Converter Out put | 150 kVA, 415 V, 3 phase 210 A, 1485 rpm |
2 TRC-2000 type Compressors by Elgi | 10.5 kg/cm2 (149 psi) |
2 Compressor Motors | 30 hp (22 kW), 415 V, 930 rpm |
2 Exhauster Motors | 7.5 kW (10.1 hp), 415 V, 970 rpm |
2 250 RE type Exhausters by Northey | 4,500 L/min (990 imp gal/min; 1,200 US gal/min) |
2 SF India Ltd. Traction Motor Blowers | 276 m3/min (9,700 cu ft/min) |
2 Traction Motor Blower Motors by Siemens | 415 V, 26 kW (35 hp), 50 A, 2920 rpm |
2 PFT-59 type Smoothing Reactors by SF India Ltd. | 4,200 m3/min (150,000 cu ft/min) |
2 Smoothing Reactor Motors | 2.2 kW (3.0 hp), 415 V, 2860 rpm |
2 KDBR-1 type Breaking Resistor Blowers by KEC International | 510 m3/min (18,000 cu ft/min) |
Breaking Resistor Blower Motor | 30 kW (40 hp), 450 V, 76 A DC, 3300 rpm |
Brushes grade | EG1055/BG 1165 (Margnite) |
Brushes type | 2 split |
Brushes size | 200 mm × 40 mm × 64 mm (7.874 in × 1.575 in × 2.520 in) |
Brushes Wear limit | 25 mm (0.984 in) |
2 PHMX-40-6 type Rectifier Blowers by SF India Ltd. | 3,100–3,200 m3/h (110,000–110,000 cu ft/h) |
2 Rectifier Blower Motors | 2.2 kW (3.0 hp), 415 V, 4.8A, 2860 rpm |
MLBH-60-1-H2 type Coil Cooler Blower by SF India Ltd. | 22,200 m3/h (780,000 cu ft/h) |
Coil Cooler Blower Motor | 22 kW (30 hp), 415 V, 45 A, 1450 rpm |
Oil Pump by Best & Co. Pvt. Ltd. | 730 L/min (160 imp gal/min; 190 US gal/min) |
Oil Pump Motor | 32 kW (43 hp), 415 V, 2865 rpm |
2 SL 30 type Smoothing Reactors | 1250 V, 1350 A |
Smoothing Reactor Resistance at 110 degrees Celsius (230 degrees Fahrenheit) | 0.00344 ohms |
Sheds
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- Ajni (ANJI)
- Angul (ANGL)
- Arakkonam (AJJ)
- Asansol (ASN)
- Bhilai (BIA)
- Bhusaval (BSL)
- Bokaro(BKSC)
- Bondamunda (BNDM)
- Erode (ED)
- Jhansi (JHS)
- Kalyan (KYN)
- Kanpur (CNB)
- Kazipet (KZJ)
- Lallaguda (LGD)
- Ludhiana (LDH)
- Mughalsarai (MGS)
- Netaji Subhas Chandra Bose Gomoh (GMO)
- New Katni Junction (NKJ)
- Tatanagar (TATA)
- Tughlakabad (TKD)
- Valsad (BL)
- Vijayawada (BZA)
- Visakhapatnam (VSKP)
- Khanalampura (KJGY)
Performance
WAG-7 with a gear ratio of 18:64 has the following capacity while hauling BOX wagons (in tonnes):
Level/Grade | Start | 20 | 30 | 40 | 50 | 60 | 70 | 80 | 90 | 100 |
---|---|---|---|---|---|---|---|---|---|---|
Level | 7500+ | 7500+ | 7500+ | 7500+ | 7500+ | 7500+ | 7500+ | 7500+ | 5236 | 3732 |
1 in 500 | 5859 | 5859 | 5859 | 5859 | 5859 | 5765 | 4555 | 3808 | 2714 | 2003 |
1 in 200 | 4065 | 4065 | 4065 | 4065 | 3982 | 3125 | 2510 | 2135 | 1540 | 1148 |
1 in 150 | 3468 | 3330 | 3272 | 3210 | 3145 | 2476 | 1995 | 1703 | 1229 | 916 |
1 in 100 | 2669 | 2294 | 2265 | 2234 | 2201 | 1736 | 1401 | 1198 | 861 | 638 |
1 in 50 | 1512 | 1149 | 1140 | 1131 | 1121 | 879 | 704 | 599 | 419 | 300 |
WAG-7 with a gear ratio of 18:64 has the following capacity while hauling BOXN wagons (in tonnes):
Level/Grade | Start | 20 | 30 | 40 | 50 | 60 | 70 | 80 | 90 | 100 |
---|---|---|---|---|---|---|---|---|---|---|
Level | 7500+ | 7500+ | 7500+ | 7500+ | 7500+ | 7500+ | 7500+ | 7500+ | 5404 | 3793 |
1 in 500 | 6836 | 6836 | 6836 | 6836 | 6836 | 6016 | 4712 | 3904 | 2759 | 2021 |
1 in 200 | 4516 | 4433 | 4328 | 4209 | 4088 | 3198 | 2558 | 2166 | 1555 | 1154 |
1 in 150 | 3790 | 3425 | 3361 | 3288 | 3212 | 2523 | 2026 | 1723 | 1238 | 920 |
1 in 100 | 2859 | 2340 | 2308 | 2272 | 2233 | 1759 | 1416 | 1208 | 866 | 640 |
1 in 50 | 1575 | 1161 | 1152 | 1141 | 1130 | 885 | 708 | 602 | 420 | 300 |
WAG-7 with a gear ratio of 65:16 has the following capacity while hauling BOXN wagons (in tonnes):
Level/Grade | Start | 20 | 30 | 40 | 50 | 60 | 70 | 80 | 90 | 100 |
---|---|---|---|---|---|---|---|---|---|---|
Level | 10815 | 7500+ | 7500+ | 7500+ | 7500+ | 7500+ | 7500+ | 7302 | 4619 | 2785 |
1 in 500 | 7169 | 7169 | 7169 | 7169 | 7169 | 6192 | 5005 | 3465 | 2345 | 1465 |
1 in 200 | 4738 | 4738 | 4738 | 4738 | 4085 | 3285 | 2715 | 1915 | 1295 | 820 |
1 in 150 | 3977 | 3960 | 3880 | 3795 | 3210 | 2590 | 2150 | 1515 | 1020 | 645 |
1 in 100 | 3002 | 2705 | 2665 | 2625 | 2225 | 1805 | 1500 | 1055 | 725 | 450 |
1 in 50 | 1700 | 1345 | 1335 | 1320 | 1120 | 905 | 750 | 515 | - | - |
WAG-7H has the following capacity while hauling BOX wagons (in tonnes) :
Level/Grade | Start | 20 | 30 | 40 | 50 | 60 | 70 | 80 |
---|---|---|---|---|---|---|---|---|
Level | 6000+ | 6000+ | 6000+ | 6000+ | 6000+ | 6000+ | 6000+ | 6000+ |
1 in 500 | 6000+ | 6000+ | 6000+ | 6000+ | 6000+ | 5930 | 4835 | 3380 |
1 in 200 | 4350 | 4350 | 4350 | 4350 | 4040 | 3210 | 2665 | 1885 |
1 in 150 | 3710 | 3710 | 3710 | 3705 | 3245 | 2545 | 2115 | 1500 |
1 in 100 | 2855 | 2655 | 2620 | 2580 | 2195 | 1780 | 1485 | 1045 |
1 in 50 | 1660 | 1330 | 1320 | 1310 | 1110 | 895 | 745 | 510 |
WAG-7H has the following capacity while hauling BOXN wagons (in tonnes) :
Level/Grade | Start | 20 | 30 | 40 | 50 | 60 | 70 | 80 |
---|---|---|---|---|---|---|---|---|
Level | 6000+ | 6000+ | 6000+ | 6000+ | 6000+ | 6000+ | 6000+ | 6000+ |
1 in 500 | 6000+ | 6000+ | 6000+ | 6000+ | 6000+ | 6000+ | 5005 | 3465 |
1 in 200 | 4835 | 4835 | 4835 | 4835 | 4085 | 3285 | 2715 | 1915 |
1 in 150 | 4135 | 3960 | 3880 | 3795 | 3210 | 2590 | 2150 | 1515 |
1 in 100 | 3060 | 2705 | 2665 | 2625 | 2225 | 1805 | 1500 | 1055 |
1 in 50 | 1730 | 1345 | 1335 | 1320 | 1120 | 905 | 750 | 515 |
Image Gallery
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Wag7kazipet.jpg
WAG-7 (old variant) belonging to Electric Loco Shed, Kazipet
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JHS based WAG-7 loco - 27072 with BTPN (Tank-car rakes).jpg
Jhansi based WAG 7 loco - 27072 with BTPN (Tank-car rakes)
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LGD WAG-7 in WAP-4 (28068) with a Freight train.jpg
Lallaguda WAG-7 (28068) with a Freight train
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WAG-7 27486 of Erode with a freight train at Pithapuram 01.jpg
WAG-7 (27486) of Erode with a freight train at Pithapuram
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WAG7 locomotive of MGS shed.jpg
WAG 7 locomotive of Mughalsarai shed
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BOXN freight action.jpg
BOXN freight action with WAG 7 loco
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WAG7 of ED BHEL make close-up.jpg
BHEL-made WAG7 of Erode loco shed hauling freight
See also
References
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Indian AC electric loco information
External links
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