ELECTRICAL ENGINEERING LABORATORY
The Scott Laboratory of Electrical Engineering.—This laboratory was
initially equipped and endowed by Mrs. Frances Branch Scott, of Richmond,
Va., as a memorial to her late son, an alumnus of this University. During
the year 1910 the equipment was substantially increased through the generosity
of the Hon. Charles R. Crane, of Chicago, Ill., a friend of the University.
Substantial additions of machines, measuring instruments, control apparatus,
and auxiliaries are being made regularly in order to keep the equipment
in the best order for laboratory work.
In addition to a supply from the University Power Plant the laboratory
is furnished from the Virginia Public Service Company through a synchronous
motor driving an alternator and three-wire direct current generator, with two
exciters, all on a common shaft. A complete three-panel switchboard for the
control of this set is equipped with full sets of instruments and controls including
a voltage regulator for the alternating current generator. Universal
plug and receptacle-connections facilitate the setting up of all experimental
combinations.
For the machine testing there are available two direct-current motor generator
sets with automatic push-button start and stop control complete, several
direct current motors and generators, series, shunt and compound; high-voltage
direct current generator set; steam-turbine-driven three-phase alternator
with exciter and control switchboard; experimental test set for alternating
current single or polyphase generator operation or induction motor
testing; a second test set with modern switchboard control panel and driving
motor with automatic start, stop, and reverse equipment; singe-phase induction
motor; single-phase repulsion-induction motor; two- and three-phase
induction motors; three-phase induction-motor set for concatenation tests;
induction generator; double-current generator; several pairs of constant potential
transformers; constant-current transformer; polyphase transformer;
mercury arc rectifier set; Prony brakes for all motors; variable resistances;
variable inductances and capacities; current and potential transformers; recording
instruments; meters for measuring frequency, power factor and indicators
of synchronism and grounded circuits. A complete three-element
oscillograph set with all accessories is available. Two telephone central-office
ringer and signal sets, and a 100-watt radio broadcast transmitter are
installed. A complete artificial transmission line with oscillator, bridge,
vacuum-tube ammeter-voltmeter and auxiliary equipment is available for
communication tests.
In addition to full sets of electric meters with the appliances for testing
and calibrating them, galvanometers of the best modern types, standard cells
and resistances, standard condensers, and other pieces of apparatus for minor
tests, this laboratory contains numerous pieces of the very best construction.
Such are the Wolff potentiometer, the Siemens and Halske Thomson double
bridge, the Koepsel permeameter, the Station photometer with Lummer-Brodhun
screen, Macbeth illuminometer, the Carey-Foster bridge and others.
