Electrical Abbreviations and Full Forms

Electrical El ectrical Basic Abbreviations Abbreviat ions an d Full Form s Sl.No. Sl.No.

Abbreviation

Explanation Explanation

1

HT

High Tension (Transformer (Transforme r HT side)

2

LT

Low Tension

3

4

 

AB switch DO fuse

5

 

6

 

7

8

Drop Out fuse ACB VCB

SF6 Circuit Breaker  

Air Break switch

ACDB

Air Circuit Breaker Vacuum Circuit Breaker Sulphur Hexafluoride Circuit Breaker Alternating Current Distribution Board

9

DCDB

Direct Current Distribution Board

10

PDB

Power Distribution Board

11

MPDB

Main Power Distribution Distributi on Board

12

PCC

Power Control Centre

13

MCC

Motor Control Centre

14

MCP

Motor Control Panel

15

 

VVVF

Variable Voltage Variable Frequency Drive

16

 

VSD

Variable Speed Drive

17

DOL

Direct On Line

18

RDOL

Reverse Duty On Line

19

MLDB

Main Lighting Distribution Board

20

SLDB

Secondary Lighting Distribution Board

21

EMLDB

Emergency Lighting Distribution Distributi on Board

22

CPSS

Construction Power Substation

23

DSS

Distribution Power Substation

24

RCC

Remote Control Cables

25

MCB

Miniature Circuit Breaker

26

MCCB

Moulded Case Circuit Breaker

27

MPCB

Motor Protection Circuit Breaker

28

EMPR

Electronic Motor Protection Relay 

29

RCCB

Residual Current Circuit Breaker

30

RCBO

Residual Current Circuit Breaker with Over-current Protection

31

ELCB

Earth Leakage Circuit Breaker

32

HRC fuse

High Rupture Capacity fuse

33

OLTC

On Load Tap Changer

34

FCMA

Flux Compensated Magnetic Amplifier

35

UPS

Un-interrupted Un-interrupt ed Power Supply 

36

SMF Battery

Sealed Maintenance Free Battery 

37

JB

Junction Box

38

PB

Push Button

39

TB

Terminal Box

40

LCB

Local Control Board

41

LCS

Local Control Station

42

SPNDB

Short circuit Protection Neutral Distribution Distributi on Board

43

TPNDB

Three Phase and Neutral Distribution Board

44

CT

Current Transformer

45

PT

Potential Transformer

46

SCIM

Squirrel Cage Induction Motor

47

 

ACVS

Air Conditioning Conditioni ng and Ventilation System

48

FDA

Fire Detection and Alarm

49

PCS

Pull Cord Switch

50

ZSS

Zero Speed Switch

51

BSS

Belt Sway Switch

52

NO

Normally Opened

53

NC

Normally Closed

54

TEFC

Total Enclosed Fan Cooled

55

TESC

Totally Enclosed Surface Cooled

56

ISMC

Indian Standard Medium weight Channel

57

GI busbar

Galvanized Iron bus bar (for Earthing)

Autom ation ati on an d Instru Inst ru m entation entati on Sl.No. Sl.No.

Abbreviation

Explanation Explanation

1

PLC

Programmable Logic Controller

2

DCS

Distributed Control System

3

MPI

Multi Point Interface

4

DP

Distributed Peripheral

5

SCADA

Supervisory Control And Data Acquisition

6

HART

Highway Addressable Remote Transducer

7

HMI

Human Machine Interface

8

MMI

Man Machine Interface

9

 

VDU

Visual Display Unit

10

RIO

Remote Input Output

11

TCP/IP

Transmission Control Protocol-Internet Protocol-Inter net Protocol

12

CFC

Continuous Function Chart

13

SFC

Sequential Function Chart

14

PID control

Proportional Integral and Derivative Derivativ e control

15

RAM

Random Access Memory 

16

ROM

Read Only Memory 

17

PROM

Programmable Read Only Memory 

18

EPROM

Erasable Programmable Read Only Memory 

19

EEPROM

Electrically Erasable Programmable Read Only Memory 

20

RTD

Resistance Temperature Device

Standards Sl.No. Sl.No.

Abbreviation

Explanation Explanation

1

IEC

International Internationa l Electrotechnical Electrotechn ical Commission

2

EN

European Norms

3

CENELEC

European Committee for Electrotechnical Electrotechnical Standardization Standardization

4

 

VDE

Verband Deutscher Elektrotechniker Elektrotechni ker

5

BS

British Standards

6

ISA

International International Standards Association

7

ISO

International Internatio nal Standards Organization

8

NEMA

National Electrical Manufacturers Manufacturer s Association

9

BIS

Bureau of Indian Standards

10

IEEE

Institute of Electrical and Electronics Engineers

11

ISI

Indian Standards Institute

12

 

ANSI

American National Standards Institute

13

IP

Ingress Protection

14

ISMC

International Society of Motor Control