|
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 |
