A |
ampere, A-phase primary |
a |
a-phase secondary |
AA |
all aluminum (conductor) |
AAC |
all aluminum conductor |
AAAC |
all aluminum, alloy conductor (“triple-A C”) |
AACSR |
all aluminum conductor, steel reinforced |
AC, ac |
alternating current |
AC-6201 |
all aluminum conductor, 6201 alloy |
ACAR |
aluminum conductor alloy reinforced |
ACB |
air circuit breaker |
ACSR |
aluminum conductor steel reinforced |
ACI |
American Concrete Institute |
ACSR |
aluminum conductor steel reinforced |
ACSR/AW |
aluminum conductor steel reinforced, Alumaweld |
ADA |
American with Disabilities Act |
ADC |
analog to digital converter |
AEIC |
Association of Edison Illuminating Companies |
AGL |
above ground level |
AID |
American Institute of Architects |
AISC |
American Society of Civil Engineers |
AITC |
American Institute of Timber Construction |
Al |
aluminum |
ALSC |
American Lumber Standards Committee |
AM/FM |
automated mapping, facilities management |
amp |
ampere |
AMR |
automatic meter reading |
ANSI |
American National Standard Institute |
APA |
American Plywood Association |
APPA |
American Public Power Association |
ASD |
adjustable speed drive |
ASNR |
ambient signal-to-noise ratio |
ASTM |
American Society for Testing and Materials |
A-to-D |
analog to digital |
AWAC |
Alumaweld aluminum conductor |
AWG |
American Wire Gauge |
AWPA |
American Wood Protection Association |
AWS |
American Welding Society |
|
|
B |
B-phase primary |
b |
b-phase secondary |
BEV |
billion electron volts |
BIA |
Bureau of Indian Affairs |
BIL |
basic impulse insulation level |
BLM |
Bureau of Land Management |
BPA |
Bonneville Power Administration |
BSL |
basic switching surge level |
Btu |
British thermal unit |
BWP |
bushing well plug |
|
|
1C |
single conductor (cable) |
2C |
two conductor (cable) |
3C |
three conductor (cable) |
C |
capacitance, Celsius, Centigrade, C-phase primary |
c |
centi- (prefix for hundredth), c-phase secondary |
CAD |
computer-aided design |
CAIDI |
Customer Average Interruption Duration Index (how long) |
CAIFI |
Customer Average Interruption Frequency index (how often) |
CATV |
cable television |
CB |
circuit breaker |
ckt, cct |
circuit |
CEA |
Canadian Electricity Association |
C.F., CPF |
coefficient of friction |
cf |
cubic foot |
CFC |
chlorofluorocarbon, Cooperative Finance Corporation |
CFR |
Code of Federal Regulations |
CIC |
cable in conduit |
CL |
class (of watthour meter), current limiting, centerline |
CLF |
current limiting fuse |
cm |
centimeter |
cmil, CMIL |
circular mil |
CN |
concentric neutral |
CO |
carbon monoxide (a gas) |
CONC |
concrete |
COND, cond |
conductor |
CONN, conn |
connection |
cos |
cosine |
CRM |
customer relationship management |
CSB |
center-side break (switch) |
CPS |
counterpoise |
CT |
current transformer |
Cu |
copper |
CVT |
capacitive voltage transformer |
|
|
DA |
distribution automation |
DB |
direct bury (cable), deadbreak |
dB |
decibel |
dBm |
decibels above or below one milliwatt |
DC, dc |
direct current |
DG |
distributed generation |
Δ (delta) |
delta connection |
DOE |
Department of Energy |
DMS |
distribution management system |
DSD |
dead soft drawn (wire hardness) |
DSM |
demand side management |
DSP |
distribution service provider |
DVM |
digital volt meter |
|
|
E |
voltage, electric field |
E&O |
engineering and operations |
ECN |
engineering change notice |
EDPM |
ethylene propylene diene monomer (rubber) |
EEI |
Edison Electric Institute |
EHV |
extra-high voltage |
EIS |
environmental impact statement |
EMF |
electric and magnetic field, electromotive force |
EMC |
Electric Membership Corporation |
EMF |
electromagnetic field |
EMI |
electromagnetic interference |
EMS |
energy management system |
EPA |
Electric Power Association, Environmental Protection Agency |
ERR |
ethylene propylene rubber |
EPRI |
Electric Power Research Institute |
ER |
environmental report |
ESA |
Endangered Species Act |
ESP |
energy service provider |
EUSERC |
Electric Utility Service Equipment Requirements Committee |
|
|
F |
Fahrenheit, farad, fuse |
FCI |
fault current indicator |
FAQ |
Frequently Asked Question |
FEMA |
Federal Emergency Management Agency |
FERC |
Federal Energy Regulatory Commission |
FIFO |
first in, first out (inventory) |
FMS |
facilities management system |
FO |
fiber optics |
FR |
flame retardant, Federal Register |
ft |
foot |
|
|
g |
gram |
G |
giga- (prefix for billion), gauss |
G&T |
generation and transmission |
GHz |
gigahertz |
GIS |
geographic information system |
GIS |
gas insulated switch |
GPS |
global positioning system |
gnd, grd |
ground |
GSU |
generator step-up (transformer) |
GW |
gigawatt |
GWh |
gigawatthour |
|
|
h |
hour |
H |
henry, transformer primary terminal |
HD |
hard drawn (hardness) |
HDPE |
high density polyethylene |
hp, HP |
horsepower |
HPS |
high pressure sodium (light) |
H2S |
hydrogen sulfide (a gas) |
HV |
high voltage |
HVAC |
heating ventilation and air conditioning, high voltage alternating current |
HVDC |
high voltage direct current |
Hz |
hertz |
|
|
I |
current |
IBEW |
International Brotherhood of Electrical Workers |
ID |
identification |
I.D. |
inside diameter |
IEEE |
Institute of Electrical and Electronic Engineers |
ITC |
independent transmission company |
IPP |
independent power producer |
ISO |
independent system operator |
in. |
inch |
IOU |
investor owned utility |
IR |
infrared |
ISO |
independent system operator |
|
|
J |
junction (box), joule |
JO |
job order |
|
|
K |
Kelvin |
k |
kilo- (prefix for thousand) |
kcmil |
thousand circular mils (replaces MCM) |
kg |
kilogram |
kip |
1,000 pounds |
kHz |
kilohertz |
km |
kilometer |
ksi |
kips per square inch |
kV |
kilovolt |
kVA |
kilovoltampere |
kVAR |
kilovar |
kVARh |
kilovarhour |
kW |
kilowatt |
kWh |
kilowatthour |
KYZ |
KYZ (three-wire signal output from a meter) |
|
|
l |
liter |
LB |
load break |
lb |
pound |
lbs |
pounds |
LCD |
liquid crystal display |
LED |
light emitting diode |
LIFO |
last in, first out (inventory) |
log |
logarithm |
ln |
natural logarithm |
LPT |
low profile transformer |
LR |
load research |
LRTP |
loadbreak reducing tap plug |
LTC |
line-tap changing, load-tap changing (transformer) |
|
|
M |
mega- (prefix for million) |
m |
milli- (prefix for thousandth), meter |
mA |
milliampere |
MAIFI |
momentary average interruption frequency index |
MCD |
maximum design cantilever |
MDSP |
meter data service provider |
mg |
milligram |
MHD |
medium hardness drawn (hardness) |
MG |
motor-generator |
mm |
millimeter |
MO |
maintenance order |
MOT |
maximum operating temperature |
MOV |
metal oxide varistor |
ms |
millisecond |
MSDS |
Material Safety Data Sheet |
MSP |
meter service provider |
MTBF |
mean time between failure |
MW |
megawatt |
µ (mu) |
micro- (prefix for millionth) |
mil |
thousandth |
min |
minute |
min. |
minimum |
mV |
millivolt |
Mvar |
megavar |
MVA |
megavolt-ampere |
MW |
megawatt |
MWh |
megawatthour |
mW |
milliwatt |
|
|
n |
nano- (prefix for billionth) |
N, neut |
neutral |
NEC |
National Electric Code |
NECA |
National Electrical Contractors Association |
NEMA |
National Electrical Manufacturer’s Association |
NEPPA |
New England Public Power Association |
NERC |
North American Electric Reliability Council |
NESC |
National Electric Safety Code |
NFPA |
National Fire Protection Association |
NO |
normally open |
NRECA |
National Rural Electric Cooperative Association |
NWPPA |
Northwest Public Power Association |
|
|
OA |
oil & air (transformer cooling) |
O&M |
operations and maintenance |
OCB |
oil circuit breaker |
OCF |
overload capacity factor |
OCR |
oil circuit recloser |
OCTC |
off-circuit tap changer |
O.D. |
outside diameter |
OH |
overhead |
OHGW |
overhead ground wire |
Ω (omega) |
ohm |
OLF |
overload factor |
OSHA |
Occupational Safety and Health Administration |
OTO |
order to operate |
oz |
ounce |
|
|
P |
power |
Φ (phi) |
phase |
p |
pico- (prefix for trillionth) |
PCB |
polychlorinated biphenyl, power circuit breaker |
PCI |
Prestressed Concrete Institute |
PCM |
pulse-code modulation |
PE |
polyethylene |
PLC |
programmable logic controller |
PDM |
pulse-duration modulation |
PE |
polyethylene |
pf, PF |
power factor |
PILC |
paper insulated lead covered (cable) |
PLT |
powerline technician |
PMT |
padmount transformer |
PPD |
public power district |
ppm |
parts per million |
PRV |
peak reverse voltage |
PSD |
public service department |
psi |
pounds per square inch |
PT |
potential transformer (see also VT) |
PUC |
public utility commission |
PUD |
public utility district |
PURPA |
Public Regulatory Policies Act |
PV |
photovoltaic (solar panel) |
PVC |
polyvinyl chloride |
PWM |
pulse-width modulation |
|
|
r |
radius |
R |
resistor, thermal resistance insulating value |
REA |
Rural Electrification Administration (now RUS) |
REC |
Rural Electric Cooperative |
RECA |
Rural Electric Cooperative Association |
REMC |
Rural Electric Membership Cooperative |
RFI |
radio frequency interference |
RI/TVI |
radio interference, television interference |
rms, RMS |
root mean square |
ROW, R/W |
right of way |
RPM, rpm |
revolutions per minute |
RTE |
reducing tap elbow |
RTO |
regional transmission organization |
RTL |
routine test load |
RUS |
Rural Utilities Service (formerly REA) |
|
|
S |
switch |
s, S |
second |
SAIDI |
System Average Interruption Duration Index (how long) |
SAIFI |
System Average Interruption Frequency Index (how often) |
SD |
soft drawn (hardness) |
S/N, SNR |
signal-to-noise (a ratio) |
SCADA |
supervisory control and data acquisition |
sec |
second |
SF6 |
sulfur hexaflouride |
sin |
sine |
SMES |
superconducting magnetic storage |
SML |
specified mechanical load |
SPCC |
Spill Prevention Control and Countermeasure Plan |
SPD |
surge protective device |
SPR |
sudden pressure relay |
SPDT |
single-pole double-throw (switch) |
SPST |
single-pole single-throw (switch) |
SRM |
stress relief material, stress relief mastic (tape) |
SSAC |
steel supported aluminum conductor |
SSB |
single side break (switch) |
|
|
T |
tera- (prefix for trillion) |
tan |
tangent |
T&D |
transmission and distribution |
THD |
total harmonic distortion |
θ (theta) |
phase angle |
3θ |
three phase |
TOU |
time of use |
TRXPLE |
tree-retardent cross-linked polyethylene (cable) |
TUT |
total underground transformer |
TVA |
Tennessee Valley Authority |
TVPPA |
Tennessee Valley Public Power Association |
|
|
UBP |
uniform business practice |
UCTC |
under current (under load) tap changer |
UD |
underground distribution |
UFAS |
Uniform Federal Accessibility Standards |
UG |
underground |
UHV |
ultra-high voltage |
UL |
Underwriter’s Laboratories |
UG |
underground |
UGN |
underground |
UPS |
uninterruptible power supply |
URD |
underground residential distribution |
USDA |
United Stated Department of Agriculture |
USFS |
United States Forest Service |
USFWS |
United States Fish and Wildlife Service |
USGS |
United States Geological Survey |
UTS |
ultimate tensile strength |
|
|
V |
volt, voltmeter |
VA |
voltampere |
VAC |
volts alternating current |
VDC, Vdc |
volts dc |
VAR, var |
voltampere reactive |
VT |
voltage transformer |
|
|
W |
watt |
WAPA |
Western Area Power Administration |
Wh |
watthour |
W/O |
workorder |
|
|
X |
reactance, transformer secondary terminal |
XC |
capacitive reactance |
XL |
inductive reactance |
xfrmr, XRMR |
transformer |
XLPE |
cross-linked polyethylene (cable) |
|
|
Y |
wye connection |
|
|
Z |
impedance |
Zn |
zinc |