18WuD2x

758 W/(sr•m 2 ) • wye-wye circuit
W/(sr•m 2 ) Abbreviation of watts per steradian
square meter.
WT 1. Abbreviation of wireless telegraphy. 2. Abbreviation
of WATERTIGHT.
wt Abbreviation of WEIGHT.
WUI Abbreviation of Western Union International.
Wulf electrometer See BIFILAR ELECTROMETER.
Wullenweber antenna An electronically steerable
antenna composed of two concentric circular arrays
of masts connected to the steering circuitry.
WUX Abbreviation of Western Union telegram.
WVdc Abbreviation of direct-current working voltage:
the maximum continuous direct-current
voltage that can safely be placed across a component.
ww Abbreviation of wirewound.
W/sr Abbreviation of watts per steradian (unit of
radiant intensity).
WWV The call letters of a standard-frequency/
standard-time broadcasting station operated by
the National Bureau of Standards and located
in the continental United States. Also see
WWVH.
WWVH The call letters of a standard-frequency/
standard-time broadcasting station operated by
the National Bureau of Standards and located in
Hawaii. Also see WWV.
wx Radiotelegraph abbreviation of weather.
WXD International Telecommunications Union
symbol for meteorological radar station.
WXR International Telecommunications Union
symbol for radiosonde station.
wye adapter A connector that provides two outputs
for a single input, or vice versa. It is commonly
used in audio applications.
wye box In a three-phase power-measuring setup,
a special arrangement of two impedances, each of
which is equal to the impedance of the potential
element of the wattmeter used in the setup. The
box permits a single wattmeter to be used, which
indicates one-third the total power. Without the
box, three wattmeters would be needed.
wye connection A method of connecting three
windings in a three-phase system so that one terminal
of each winding is connected to the neutral
point. It is shaped like the letter Y. Also called
star connection.
wye current Current through one of the branches
of a three-phase star (wye) connection.
wye delta starter A starter circuit for a threephase
squirrel-cage induction motor. When the
starter switch is thrown in one direction, the stator
of the motor is wye-connected for starting;
thrown in the opposite direction, the stator is
delta-connected for continued operation.
wye equivalent circuit A wye-connected threephase
circuit equivalent to a delta-connected
circuit when the impedance of any pair of
corresponding lines for both wye and delta are
the same; the third line is unconnected.
wye junction See WAVEGUIDE WYE.
wye-matched-impedance antenna An antenna in
which the impedance of a nonresonant open-wire
feed line is matched to that of the center of the radiator
by spreading the end of the feeder wires
out into a Y-shaped or delta-shaped matching
section. Also called DELTA-MATCHED-
IMPEDANCE ANTENNA.
wye point The star point in a three-phase system.
Also see WYE CONNECTION.
Radiator
To transmitter
Feeders
Matching section
Insulating
spreader
wye-matched-impedance antenna
wye potential In a three-phase armature, the voltage
between a terminal and the neutral point.
wye rectifier A three-phase rectifier circuit in
which the transformer or generator windings are
arranged in a wye connection.
wye-wye circuit A circuit consisting a wyeconnected
generator and a wye-connected load.
Source
wye-wye circuit
Load