Abbreviations Electrity

1. HT = High Tension

 (Transformer HT Side)

2. LT = Low Tension

3. AB Switch = Air Break Switch

4. DO Fuse = Drop Out Fuse

5. ACB = Air Circuit Breaker

6. VCB = Vacuum Circuit Breaker

7. SF6 Circuit Breaker = Sulphur Hexafluoride Circuit Breaker

8. ACDB = Alternating Current Distribution Board

9. DCDB =Direct Current Distribution Board

10.PDB = Power Distribution Board

11.MPDB = Main Power Distribution 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 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 =  High Rupture Capacity Fuse

33.OLTC = On Load Tap Changer

34.FCMA = Flux Compensated Magnetic Amplifier

35.UPS = Un-Interrupted 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 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 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