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December 18, 2015

Explain the application of storage batteries.

Storage batteries are used for various purposes, some of the applications are mentioned below:

  • For the operation of protective devices and for emergency lighting at generating stations and substations.
  • For starting, ignition and lighting of automobiles, aircrafts etc.
  • For lighting on steam and diesel railways trains.
  • As a supply power source in telephone exchange, laboratories and broad casting stations.
  • For emergency lighting at hospitals, banks, rural areas where electricity supplies are not possible.

December 16, 2015

Abbreviations of Some Basic Electrical Terms

Sl. No.
Abbreviation
Full Form
1.       
AC
Alternating Current
2.       
DC
Direct Current
3.       
AWG
American Wire Gauge
4.       
SWG
Standard Wire Gauge
5.       
PLC
Programmable Logic Controller
6.       
DCS
Distributed Control System
7.       
HMI
Human Machine Interface
8.       
MMI
Man Machine Interface
9.       
RIO
Remote Input Output
10.   
RTU
Remote Terminal Unit
11.   
PID
Proportional Integral and Derivative
12.   
SCADA
Supervisory Control And Data Acquisition
13.   
SMPS
Switched Mode Power Supply
14.   
HART
Highway Addressable Remote Transducer
15.   
ACDB
 Alternating Current Distribution Board
16.   
DCDB
Direct Current Distribution Board
17.   
PDB
Power Distribution Board
18.   
PCB
Printed Circuit Board  
19.   
PCC
Power Control Centre
20.   
MCC
Motor Control Centre
21.   
MPDB
Main Power Distribution Board
22.   
ACB
Air Circuit Breaker
23.   
VCB
Vacuum Circuit Breaker
24.   
MLDB
Main Lighting Distribution Board
25.   
DOL
Direct Online
26.   
LDB
Lighting Distribution Board
27.   
SLDB
Secondary Lighting Distribution Board
28.   
EMLDB
Emergency Lighting Distribution Board
29.   
RCCB
Residual Current Circuit Breaker
30.   
MPCB
Motor Protection Circuit Breaker
31.   
MCB
Miniature Circuit Breaker
32.   
MCCB
Molded Case Circuit Breaker
33.   
EOCR
Electronic Over Current Relay
34.   
RCBO
Residual current Circuit Breaker with Over-current
Protection
35.   
ELCB
Earth Leakage Circuit Breaker
36.   
HRC fuse
High Rupture Capacity Fuse
37.   
UPS
Un-interrupted Power Supply
38.   
JB
Junction Box
39.   
TB
Terminal Box
40.   
LCS
Local Control Station
41.   
CT
Current Transformer
42.   
PT
Potential Transformer
43.   
XLPE
Cross Linked Poly Ethylene
44.   
ACSR
Aluminum Cable Steel Reinforced
45.   
PTFE
Poly Tetra Fluoro Ethylene
46.   
FRLS
Fire Resistance Low Smoke
47.   
EPR
Ethylene Propylene Rubber
48.   
GFCI
Ground Fault Circuit Interrupter
49.   
HPMV LAMP
High Pressure Mercury Vapor Lamp
50.   
HPSV LAMP
High Pressure Sodium Vapor Lamp
51.   
SCIM
Squirrel Cage Induction Motor
52.   
SRIM
Slip Ring Induction Motor
53.   
VVVF
Variable Voltage Variable Frequency
54.   
OLTC
On Load Tap Changer
55.   
FCMA
Flux Compensated Magnetic Amplifier
56.   
ACVS
Air Conditioning and Ventilation System
57.   
FDA
Fire Detection and Alarm
58.   
NO
Normally Opened
59.   
NC
Normally Closed
60.   
RTD
Resistance Temperature Detector
61.   
IEC
International Electrotechnical Commission
62.   
EN
European Norms
63.   
CENELEC
European Committee for Electrotechnical Standardization
64.   
VDE
Verband Der Elektrotechnik
65.   
BS
British Standards
66.   
ANSI
American National Standards Institute
67.   
IEEE
Institute of Electrical and Electronics Engineers
68.   
ISA
International Standards Association
69.   
ISO
International Organization for Standardization
70.   
NEMA
National Electrical Manufacturers Association
71.   
BIS
Bureau of Indian Standards
72.   
IP
Ingress Protection
73.   
ISMC
International Society of Motor Control
74.   
PCS
Pull Chord Switch
75.   
BSS
Belt Sway Switch
76.   
ZSS
Zero Speed Switch

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