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- A.C Alternating Current
- D.C Direct Current
- H.T High Tension
- L.T Low Tension
- N.O Normally Open
- N.C Normally Close
- H.V High Voltage
- L.V Low Voltage
- C.T Current Transformer
- P.T Potential Transformer
- ACDB Alternating Current Distribution Board
- DCDB Direct Current Distribution Board
- ELDB Emergency Lighting Distribution Board
- LDB Lighting Distribution Board
- PDB Power Distribution Board
- MPDB Main Power Distribution Board
- MLDB Main Lighting Distribution Board
- MCB Miniature Circuit Breaker
- MCCB Molded Case Circuit Breaker
- RCCB Residual Current Circuit Breaker
- ACB Air Circuit Breaker
- UPS Uninterruptible Power Supply
- H.P Horse Power
- M.V Mega Volt
- K.V Kilo Volt
- PLC Programmable Logic Control
- MCC Motor Control Center
- PCC Power Control Center
- ELCB Earth Leakage Circuit Breaker
- PMCC Power Motor Control Center
- MPCB Motor Protection Circuit Breaker
- OLR Over Load Relay
- L.A Lighting Arrestor
- S.P Single Pole
- DP Double Pole
- TP Triple Pole
- K.A Kilo Ampere
- J.B Junction Box
- T.B Terminal Box
- I.S Input Signal
- O.S Output Signal
- D.I Digital Input
- D.O Digital Output
- A.I Analog Input
- A.O Analog Output
- RTD Resistance Temperature Detector
- SLD SIngle Line Diagram
- RMP Revolutions Per Minute
- A Ampere
- V Voltage
- CKT Circuit
- I Current
- K Kelvin
- C.D Candela
- S Second
- W Watt
- J Joule
- OTI Oil Temperature Indicator
- DOL Direct ON Line Stater
- SDS Star Delta Stater
- HVAC Heating Ventilation And Air Condition
- EHV Extra High Voltage
- ELV Extra Low Voltage
- VFD Variable Frequency Drive
- SCP Short Circuit Protection
- E.S Energy Saving
- OLP Over Load Protection
- ELP Earth Leakage Protection
- P.L Phase Loss
- S.S Smooth Stating
- F.B Frequency Bypass
- P.S Programmble Setup
- PI Polarization Index
- AVR Automatic Voltage Regulator
- EMF Electro Motive Force
- WTI Winding Temperature
- A.T Auto Transformer
- I.T Instrument Transformer
- SPT SIngle Phase Transformer
- TPT Three Phase Transformer
- W.T Welding Transformer
- ATS Auto Transformer Stater
- SPM Single Phase Motor
- S.E Solar Energy
- W.E Wind Energy
- B.E Biomass Energy
- P.F Power Factor
- C.E Control Equipment
- OHL Over Head Line
- UGC Under Ground Cable
- R.S Rotary Switch
- F.S Float Switch
- T.S Temperature Switch
- PBS Push Button Switch
- KBS Knife Blade Switch
- H.S High Senstivity
- M.R Mechanical Relay
- LVS Low Voltage Substation
- HVS High Voltage Substation
- EHVS Extra High Voltage Substation
- UHVS Ultra High Voltage Substation