Indian locomotive class WAP-6

WAP-6[1]
Type and origin
Power type Electric
Builder CLW
Build date 1997
Total produced 17
Rebuild date August, 2012
Number rebuilt 22400-22415
Specifications
Configuration:
 ​
 • UIC Co'-Co'
Gauge 1,676 mm (5 ft 6 in)
Bogies originally Flexicoil Mark IV Fabricated;converted to Co'-Co' Flexicoil Mark 1 cast bogies; primary and secondary wheel springs with bolsters
Wheel diameter New: 1,092 mm (3 ft 7 in)
Half worn: 1,055 mm (3 ft 5 1⁄2 in)
Full worn: 1,016 mm (3 ft 4 in)
Length 18.79 m (61 ft 7 3⁄4 in)
Height 4.235 m (13 ft 10 3⁄4 in)
Axle load 18,800 kg (41,400 lb)
Loco weight 113,200 kg (249,600 lb)
Electric system/s 25 kV 50 Hz AC, AC Overhead
Current pickup(s) pantograph
Traction motors Hitachi HS15250
Loco brake Air/Hand
Train brakes Air
Safety systems Slip control, Over voltage relay and No volt relay
Performance figures
Maximum speed Intended at 140 km/h (87 mph); Restricted:105 km/h (65 mph)
Power output Max: 5,350 hp (3,990 kW)
Continuous: 5,000 hp (3,700 kW)
Tractive effort Starting:30.8 t (30 long tons; 34 short tons)
Continuous:19 t (19 long tons; 21 short tons)
Career
Operators Indian Railways
Numbers 22400-22416
Locale Eastern Railway
Withdrawn August, 2012
Disposition One scrapped remainder rebuilt

The 6th class of Wide Gauge (W), Alternating Current powered (A), Passenger-dedicated (P) series.

This class was actually variant of the WAP-4 design where Co-Co Flexicoil Mark 1 cast bogies of the usual WAP4 was replaced by Fabricated Flexicoil Mark IV bogies. All other specifications were same as WAP4. WAP-1 unit no. 22212 was the first to be rebuilt into a WAP-6. It was provided with Flexicoil bogies and other upgrades. Then it was rebuilt into WAP-4. Later, more WAP-1 units were re-geared and provided with high-adhesion fabricated bogies (Flexicoil Mark IV) which are somewhat similar to ALCO hi-adhesion bogies. They were intended to reach 140 km/h (87 mph) but failed to do so in trials and were restricted at 105 km/h (65 mph). Two units,i.e., 22406 and 22408 are upgraded with better wheel-sets. This class was an unsuccessful one. All have been converted back as WAP-4. All were homed at Asansol(ASN) shed but after conversion reallocated to Howrah (HWH)shed.[2]

Technical specifications

Technical specification[3]
Traction motorsAxle-hung, nose-suspended, force-ventilated, 3,485 kg (7,683 lb), 630 kW (840 hp), 750 V, 900 A, 895 RPM, parallel grouping, C class armature and field, temperature rise (Armature 60, filed 70 and commutator 85) in °C, coil resistance (armature 0.01284 ohms+10%, field 0.01184 ohms+10% and commutator 0.00907 ohms+10%, air gap main pole 6.35 kVA, air gap inter-pole 10 mm (0.3937 in)
Gear ratio58:23
TransformerCCL make, aluminium coil, 3400 kVA, 32 taps
Rectifier2 silicon rectifier cubicle 2700 A, 1050 V
Number of sandboxes4
2 Headlights250 W, 32 V
Lead acid Battery50 cells, 110 V (rated 5 hr)
Arno Converter216 kVA
2 FLAKT smoothing reactor blowerPHMX-40
2 Silicon Rectifier Blower60 kg (132 lb)
Oil cooler blowerS.F. India Ltd.
Smoothing reactor for traction motorSL-30 type, 1350 A, 1270 V, 2 Coils, 0.00535 ohms resistance at 110 °C (230 °F)

Hauling capacity

If the average weight of ICF coaches is 55 tonnes then:

Grades/km/hStart204060708090100110120130140150160
Level1500+1500+1500+1500+1500+1500+1500+1500+1500+1500+1500+1155805570
1 in 5001500+1500+1500+1500+1500+1500+1500+1500+1500+1500+1105805565400
1 in 2001500+1500+1500+1500+1500+1500+1500+132012301035730535375260
1 in 1501500+1500+1500+1500+1500+1500+140510901020860610445310215
1 in 1001500+157014901405136511951020795750635445320220145
1 in 5011607707507207106255304103903252201509045

See also

References

  1. ↑ "IRFCAspecs".
  2. ↑ "WAP6".
  3. ↑ "Trainweb".

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