Acronyms Compiled - Electrical


AB Switch -- Air Break switch
ACB -- Air Circuit Breaker
ACDB -- Alternating Current Distribution Board
ACVS -- Air-conditioning and Ventilation System


BC -- Bayonnet Cap
BSS -- Belt Sway switch


CPSS -- Construction Power Substation
CT -- Current Transformer


DCDB -- Direct current Distribution Board
DCS -- Distributed Control System
DO Fuse -- Drop Out Fuse
DOL -- Direct On line
DSS -- Distributed Power Substation


ELCB -- Earth Leakage Circuit Breaker
EMLDB -- Emergency Light Distribution Board
EMPR -- Electronic Motor Protection RELAY
ES -- Edison Screw


FCMA -- Flux Compensated Magnetic Amplifier
FDA -- Fire Detection & Alarm


GI Bus bar -- Galvanized Iron Bus Bar For Farthing


HRC -- Fuse High Rupture Capacity Fuse
HT -- High tension > Transformer HT Side
HV -- High Voltage
HVAC -- High Voltage Alternating Current


JB -- Junction Box


LCB -- Local Control Board
LCS -- Local Control Station
LT -- Low tension
LV -- Low Voltage


MCB -- Miniature Circuit Breaker
MCC -- Motor Control Centre
MCCB -- Molded case circuit breaker 
MCP -- Motor Control Panel
MLDB -- Main Light Distribution Board
MPCB -- Motor Protection Circuit Breaker
MPDB -- Main Power Distribution Board


NC -- Normally Closed
NO --  Normally opened


OLTC -- On Load Tap Change


PB -- Push Button
PCC -- Power Control Center
PCS -- Pull Cord Switch
PDB -- Power Distribution Board
PLC -- Programmable Logic Controller
PT -- Potential Converter


RCBO -- Residual Current Circuit Breaker With Over-Current Protection
RCC -- Remote Control Cables
RCCB -- Residual Current Circuit Breaker
RCD -- Residual Current Device
RDOL -- Reverse Duty on Line


SCIM -- Squirrel Cage Induction Motor
SF6 Circuit Breaker -- Sulphur Hexafluoride Circuit Breaker
SLDB -- Secondary Lighting Distribution Board
SMF Battery -- Sealed Maintenance Free
SPNDB -- Short Circuit Protection Neutral Distribution Board


TB -- Terminal Box
TEFC -- Total Enclosed Fan Cooled
TESC -- Totally Enclosed Surface Cooled
TPNDB -- Phase Three and Neutral Distribution Board


UPS -- Un-Interrupted Power Supply


VCB -- Vacuum Circuit Breaker
VFD -- Variable Frequency Drive
VVVF -- Variable Voltage Variable Frequency Drive


ZSS -- Zero Speed Switch