Indian locomotive class WAG-7

Specifications
Specifications
Configuration:;
• UIC	Co′Co′
Gauge	66
Axle load	20.5 tonnes (20.2 long tons; 22.6 short tons)
Electric system/s	25 kV AC
Current pickup(s)	Overhead with pantograph

Type and origin
Type and origin
Power type	Electric
Builder	Chittaranjan Locomotive Works

WAG-7
WAG-7
	WAG-7 (new variant) belonging to Electric Loco Shed, Vijaywada
Power type
Type and origin
Power type	Electric
Builder	Chittaranjan Locomotive Works
Configuration:;
Specifications
Configuration:;
• UIC	Co′Co′
Gauge	66
Axle load	20.5 tonnes (20.2 long tons; 22.6 short tons)
Electric system/s	25 kV AC
Current pickup(s)	Overhead with pantograph
Power output
Performance figures
Power output	5,350 hp (3,990 kW)
Nicknames
Career
Nicknames	SHANTIDAN, EKTA, KARAMVIR, GAJRAJ, SWARNABHA, SARVOTTAM, SAMARPAN, CAUVERY, SAMRAT, PRAYAS & AGRASAR
Locale	All over India

WAG-7 is the name of a type of electric locomotive used in India. It is a very powerful locomotive in Indian Railways' fleet. 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. These are six axles loco with axle and nose suspended drive. On 3rd Aug. 1992, the first WAG-7 locomotive was inaugurated and christened the name 'SHANTIDAN' in honour of Mother Teresa. The loco is fitted with six Hitachi designed DC series traction motors type HS15250A, controlled by a tap changer are used in this locomotive. Indian Railway is going to achieve 7 million tonnes 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. Around 1750 WAG-7 in service as of January 2013.

Technical specifications^[1]

Traction Motors	Hitachi HS15250A (a variant of the standard HS15250 with higher current rating (thicker wire gauge, better insulation); see description under WAP-4.) Motors built by CLW and BHEL.
Gear Ratio	65:18 (65:16?)
Transformer	CCL India, type CGTT-5400, 5400kVA, 32 taps.
Rectifiers	Two silicon rectifiers, cell type S18FN350 (from Hind Rectifier), 64 per bridge, 2700A / 1050V per
Axle load	20.5t
loco weight	113 t
Bogies	High-adhesion bogies (probably Flexicoil Mark IV?, fabricated bogie frame assembly), with unidirectional mounting of traction motors, primary and secondary suspension.
Hauling Capacity	3010t
Pantographs	Two Stone India (Calcutta) type AN-12.
Current Ratings	1350A/2min, 1200A/10min, 960A/hr, 900A continuous