Indian locomotive class WAG-7

Specifications
Specifications
Configuration:;
• UIC	Co′Co′
Gauge	5 ft 6 in (1,676 mm)
Bogies	ALCO Fabricated
Wheel diameter	New: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)
Length	20.934 m (68 ft 8+1⁄8 in)
Width	3.179 m (10 ft 5+1⁄8 in)
Height	WAG-7 : 4.185 m (13 ft 8+3⁄4 in); WAG-7H : 4.135 m (13 ft 6+3⁄4 in)
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 weight	WAG-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 systems	Slip 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

Type and origin
Type and origin
Power type	Electric
Builder	Chittaranjan Locomotive Works (CLW), ; Bharat Heavy Electricals Limited (BHEL).
Build date	1990–2015(CLW) ; 2009–2023(BHEL)
Total produced	1773 (CLW) ; 201 (BHEL) ; 1974

WAG-7
WAG-7
	Arakkonam based WAG-7 going towards ERS loco trip shed.
Power type
Type and origin
Power type	Electric
Builder	Chittaranjan Locomotive Works (CLW), ; Bharat Heavy Electricals Limited (BHEL).
Build date	1990–2015(CLW) ; 2009–2023(BHEL)
Total produced	1773 (CLW) ; 201 (BHEL) ; 1974
Configuration:;
Specifications
Configuration:;
• UIC	Co′Co′
Gauge	5 ft 6 in (1,676 mm)
Bogies	ALCO Fabricated
Wheel diameter	New: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)
Length	20.934 m (68 ft 8+1⁄8 in)
Width	3.179 m (10 ft 5+1⁄8 in)
Height	WAG-7 : 4.185 m (13 ft 8+3⁄4 in); WAG-7H : 4.135 m (13 ft 6+3⁄4 in)
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 weight	WAG-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 systems	Slip 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
Maximum speed
Performance figures
Maximum speed	105 km/h (65 mph)
Power output	Max : 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
Operators
Career
Operators	Indian Railways
Numbers	WAG-7 : 27001-27999, 28000-28770, 24501-24701 ; WAG-7H : 28024 and 28739
Nicknames	SHANTIDAN, EKTA, KARAMVIR, GAJRAJ, SWARNABHA, SARVOTTAM, SAMARPAN, CAUVERY, SAMRAT, PRAYAS & AGRASAR
Locale	All over India
Disposition	active

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 1974 WAG-7 were built at CLW and BHEL between 1990 and 2015 by CLW and 2009 and 2023 by BHEL which made them the most numerous class of mainline electric locomotive till its successor the WAG-9.

The WAG-7 is one of the most successful locomotives of Indian Railways, serving freight trains since its introduction in 1990. 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.