Indian Railways Loco & Traction Technical Abbreviations – Full Forms

 

S.No.	Abbreviation	Full Form
1	AVB	Automatic Vacuum Brake
2	BS	Braking in Series
3	BSP	Braking in Series-Parallel
4	DEMU	Diesel Electric Multiple Unit
5	DETC	Diesel Electric Tower Car
6	DHMU	Diesel Hydraulic Multiple Unit
7	DMH	Dead Man's Handle
8	DMU	Diesel Multiple Unit
9	DJ	Main Circuit Breaker (from French: Disjoncteur)
10	DPC	Driving Power Car
11	DS	Disconnecting Switch
12	DTC	Driving Trailer Car
13	ELCM	Electronic Load Control Module
14	EMU	Electric Multiple Unit
15	EOG	End-On Generation
16	ETCS	European Train Control System
17	FEDL	Fully Electrified Double Line
18	FOR	Forward Direction
19	GTO	Gate Turn-Off Thyristor
20	HEP	Head-End Power
21	HHPDMU	High Horse Power Diesel Multiple Unit
22	HOG	Head-On Generation
23	HPDMU	High Power Diesel Multiple Unit
24	HSCB	High Speed Circuit Breaker
25	HT	High Tension
26	HTCBC	High Tensile Centre Buffer Coupler
27	HTS	High Tensile Steel
28	IGBT	Insulated Gate Bipolar Transistor
29	JRI	Junction Route Indicator
30	LOB	Lube Oil Balance
31	LVC	Last Vehicle Check
32	MCB	Master Circuit Breaker
33	MCI	Malleable Cast Iron
34	MEMU	Mainline Electric Multiple Unit
35	MLRI	Multi Lamp Route Indicator
36	MOG	Mid-On Generation Car
37	MOT	Motoring
38	OHE	Overhead Equipment
39	PCS	Pneumatic Control System
40	REV	Reverse Direction
41	SCADA	Supervisory Control and Data Acquisition
42	SOD	Schedule of Dimensions
43	STR	Schedule of Technical Requirements
44	TAB	Train Air Brake
45	TLC	Traction Locomotive Controller
46	TM	Traction Motor
47	TPC	Traction Power Controller
48	TRO	Traction Rolling Stock Operations
49	TSS	Traction Sub-Station
50	UPF	Unity Power Factor
51	VCB	Vacuum Circuit Breaker
52	VCC	Vacuum Continuity Certificate
53	VRP	Voltage Regulating Panel
54	WILD	Wheel Impact Load Detector
55	WSR	Wheel Slip Relay

 

S.No.	Abbreviation	Full Form
56	AC	Alternating Current
57	AC-AC	Alternating Current to Alternating Current Traction System
58	AC-DC	Alternating Current to Direct Current Traction System
59	APU	Auxiliary Power Unit
60	ATO	Automatic Train Operation
61	AUX	Auxiliary Supply
62	BCU	Brake Control Unit
63	CCB	Computer Controlled Brake System
64	CCB-II	Computer Controlled Brake System – Version II
65	CCBE	Computer Controlled Brake Equipment
66	CCBP	Centre Buffer Coupler
67	CCBS	Computer Controlled Braking System
68	DC	Direct Current
69	DDU	Driver Display Unit
70	DPCU	Driver Power Control Unit
71	ECP	Electronically Controlled Pneumatic Brake
72	ECU	Electronic Control Unit
73	EMD	Electro-Motive Diesel
74	FIP	Fault Indication Panel
75	GCU	Gate Control Unit
76	HMI	Human Machine Interface
77	HSM	High Speed Mode
78	HVAC	Heating, Ventilation and Air Conditioning
79	IGBT	Insulated Gate Bipolar Transistor
80	IM	Induction Motor
81	IPM	Intelligent Power Module
82	LCC	Loco Control Computer
83	LCD	Liquid Crystal Display
84	LED	Light Emitting Diode
85	LSP	Loco Service Processor
86	MCB	Miniature Circuit Breaker
87	MCU	Master Control Unit
88	MPS	Maximum Permissible Speed
89	MVB	Multifunction Vehicle Bus
90	PIS	Passenger Information System
91	PLC	Programmable Logic Controller
92	PMG	Permanent Magnet Generator
93	PTC	Positive Train Control
94	PWM	Pulse Width Modulation
95	RCCB	Residual Current Circuit Breaker
96	SMPS	Switched Mode Power Supply
97	SR	Speed Restriction
98	TCMS	Train Control and Management System
99	TCU	Traction Control Unit
100	TFP	Traction Power Package
101	TMS	Traction Management System
102	TPWS	Train Protection and Warning System
103	VCB	Vacuum Circuit Breaker
104	VCU	Vehicle Control Unit
105	VFD	Variable Frequency Drive
106	VVVF	Variable Voltage Variable Frequency Drive
107	WAG	Wide Gauge AC Goods Locomotive
108	WAM	Wide Gauge AC Mixed Traffic Locomotive
109	WAP	Wide Gauge AC Passenger Locomotive
110	WCAM	Wide Gauge AC/DC Mixed Traffic Locomotive
111	WCAG	Wide Gauge AC/DC Goods Locomotive
112	WCAP	Wide Gauge AC/DC Passenger Locomotive
113	WDG	Wide Gauge Diesel Goods Locomotive
114	WDM	Wide Gauge Diesel Mixed Traffic Locomotive
115	WDP	Wide Gauge Diesel Passenger Locomotive
116	WDS	Wide Gauge Diesel Shunting Locomotive
117	WSP	Wheel Slip Protection
118	ZPT	Zero Pressure Transformer (Special Applications)

 

S.No.	Abbreviation	Full Form
119	YP	Meter Gauge Passenger Steam Locomotive
120	YG	Meter Gauge Goods Steam Locomotive
121	YDM	Meter Gauge Diesel Mixed Traffic Locomotive
122	YDP	Meter Gauge Diesel Passenger Locomotive
123	YDG	Meter Gauge Diesel Goods Locomotive
124	ZDM	Narrow Gauge Diesel Mixed Traffic Locomotive
125	NDM	Narrow Gauge Diesel Mixed Traffic Locomotive
126	WAM	Wide Gauge AC Mixed Traffic Locomotive
127	WAG	Wide Gauge AC Goods Locomotive
128	WAP	Wide Gauge AC Passenger Locomotive
129	WCG	Wide Gauge AC Goods Locomotive (Historical)
130	WCM	Wide Gauge DC Mixed Traffic Locomotive
131	WCG	Wide Gauge DC Goods Locomotive
132	WCP	Wide Gauge DC Passenger Locomotive
133	WCAM	Wide Gauge AC/DC Mixed Traffic Locomotive
134	WCAG	Wide Gauge AC/DC Goods Locomotive
135	WCAP	Wide Gauge AC/DC Passenger Locomotive
136	WDM	Wide Gauge Diesel Mixed Traffic Locomotive
137	WDG	Wide Gauge Diesel Goods Locomotive
138	WDP	Wide Gauge Diesel Passenger Locomotive
139	WDS	Wide Gauge Diesel Shunting Locomotive
140	WDP-1	Wide Gauge Diesel Passenger – Class 1
141	WDP-3A	Wide Gauge Diesel Passenger – Class 3A
142	WDP-4	Wide Gauge Diesel Passenger – Class 4
143	WDP-4B	Wide Gauge Diesel Passenger – Class 4B
144	WDP-4D	Wide Gauge Diesel Passenger – Class 4D
145	WDG-3A	Wide Gauge Diesel Goods – Class 3A
146	WDG-4	Wide Gauge Diesel Goods – Class 4
147	WDG-4D	Wide Gauge Diesel Goods – Class 4D
148	WDG-5	Wide Gauge Diesel Goods – Class 5
149	WDG-6G	Wide Gauge Diesel Goods – Class 6G
150	WDM-2	Wide Gauge Diesel Mixed – Class 2
151	WDM-3A	Wide Gauge Diesel Mixed – Class 3A
152	WDM-3D	Wide Gauge Diesel Mixed – Class 3D
153	WDM-6	Wide Gauge Diesel Mixed – Class 6
154	WAP-1	Wide Gauge AC Passenger – Class 1
155	WAP-4	Wide Gauge AC Passenger – Class 4
156	WAP-5	Wide Gauge AC Passenger – Class 5
157	WAP-7	Wide Gauge AC Passenger – Class 7
158	WAG-5	Wide Gauge AC Goods – Class 5
159	WAG-7	Wide Gauge AC Goods – Class 7
160	WAG-9	Wide Gauge AC Goods – Class 9
161	WAG-9H	Wide Gauge AC Goods – High Adhesion
162	WAG-9HH	Wide Gauge AC Goods – Higher Horsepower
163	WAG-12B	Wide Gauge AC Goods – 12,000 HP Twin Section
164	WCAG-1	Wide Gauge AC/DC Goods – Class 1
165	WCAM-1	Wide Gauge AC/DC Mixed – Class 1
166	WCAM-2	Wide Gauge AC/DC Mixed – Class 2
167	WCAM-3	Wide Gauge AC/DC Mixed – Class 3
168	WCM-1	Wide Gauge DC Mixed – Class 1
169	WCM-2	Wide Gauge DC Mixed – Class 2
170	WCM-3	Wide Gauge DC Mixed – Class 3
171	WCM-4	Wide Gauge DC Mixed – Class 4
172	WCM-5	Wide Gauge DC Mixed – Class 5
173	WCG-2	Wide Gauge DC Goods – Class 2
174	WCP-1	Wide Gauge DC Passenger – Class 1
175	WCP-2	Wide Gauge DC Passenger – Class 2
176	WCP-3	Wide Gauge DC Passenger – Class 3

Locomotive Code का अर्थ

उदाहरण: WAP-7

• W = Wide Gauge (1676 mm)
• A = AC Electric
• P = Passenger
• 7 = Locomotive Class

WAG-9

• W = Wide Gauge
• A = AC Electric
• G = Goods
• 9 = Class Number

WDG-4

• W = Wide Gauge
• D = Diesel
• G = Goods
• 4 = Class Number

WDP-4D

• W = Wide Gauge
• D = Diesel
• P = Passenger
• 4D = Upgraded Variant