22/10/2021
Full meaning:-
1) MC = Magnetic Contactor
2) NO = Normally Open
3) NC = Normally Close
4) AVR = Automatic Voltage Regulator
5) VFD = Variable Frequency Drive
6) MCB = Miniature Circuit Breaker
7) MCCB = Molded Case Circuit Breaker
8)HT = High Tension
9) LT = Low Tension
10) ATS = Automatic Transfer Switch
11) DB = Distribution Board
12) SDB = Sub Distribution Board
13) VCB = Vaccum Circuit Breaker
14) ACB = Air Circuit Breaker
15) BBT = Bus Bar Trunking System
16) MPCB = Motor Protection Circuit Breaker
17) DOF = Drop Out Fuse
18) PFI = Power Factor Improvement
19) HRC Fuse = High Rupturing Capacity
20) L1, L2, L3 = Supply Coil in three phase system
21) R, S, T = Input terminal of supply coil
22) U, V, W = Output terminal of Supply Coil
23) LBS = Load Break Switch
24) ELCB = Earth leakage Circuit Breaker
25) RCCB = Residual Current Circuit Breaker
26) OCB = Oil Circuit Breaker
27) PLC = Programmable Logic Controller
28) DCS = Distributed Control System
29) SCADA = Supervisory Control & Data Acquisition system
30) HMI = Human Machine Interface