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Abbreviations For RLY Technical Terms

Loco & Traction

 

AVB
Automatic Vacuum Brake
BS
Braking in Series configuration
BSP
Braking in Series-Parallel configuration
DJ
From the French disjoncteur, the main circuit breaker of an electric loco 
DEMU
Diesel-Electric Multiple Unit
DETC
Diesel-Electric Tower Car
DHMU
Diesel Hydraulic Multiple Unit
DMH
Dead Man's Handle 
DMU
Diesel Multiple Unit
DPC
Driving Power Car
DS
Disconnecting Switch 
DTC
Driving Trailer Car 
ELCM
Electronic Load Control Module 
EMU
Electric Multiple Unit
EOG
End-On Generator Car
ETCS
European Train Control System
FEDL
Fully Electrified Double Line
FOR
Forward motion
GTO
Gate Turn-Off thyristor
HEP
Head-end Power (power from the loco for the coaches)
HOG
Head-On Generator
HHPDMU
High-Horsepower Diesel Electric Multiple Unit
HPDMU
High-powered Diesel Multiple Unit
HSCB
High-speed Circuit Breaker
HT
High Tension
HTCBC
High Tensile-strength Centre-Buffer Coupler
HTS
High Tensile-strength Steel
IGBT
Insulated Gate Bipolar Transistor
JRI
Junction Route Indicator
LOB
Lube Oil Balance
LVC
Last Vehicle Check 
MCB
Master Circuit Breaker (in locos)
MCI
Malleable Cast Iron
MEMU
Main-line Electric Multiple Unit
MLRI
Multi-Lamp Route Indicator
MOG
Mid-On Generator Car
MOT
Motoring (master controller in loco)
OHE
Overhead Equipment
PCS
Pneumatic Control System 
REV
Reverse motion , Reverser
SCADA
Supervisory Control and Data Acquisition
SOD
Schedule of Dimensions
STR
Schedule of Technical Requirements
TAB
Train Air Brake
TLC
Traction Locomotive Controller
TM
Traction Motor
TPC
Traction Power Controller
TRO
Traction Rolling-stock Operations
TSS
Traction Sub-Station
UPF
Unity Power Factor
VCC
Vacuum Continuity Certificate (issued before train departure)
VCB
Vacuum Circuit Breaker
VRP
Voltage Regulating Panel
WILD
Wheel Impact Load Detector
WSR
Wheel Slip Relay