The Electrical Laboratories
The electrical laboratories are located on the first floor of the Laboratory Building. A centrally located stock room houses much of the equipment used for test and measurement.
Electric power for the laboratories is obtained from the Public Service Electric & Gas Company through a 240-volt, 3-phase, 60-cycle alternating current line. By means of transformers, motor-generator sets, synchronous converters, oscillators, rectifiers, and storage batteries, direct or alternating current power of wide range of voltage and frequency is available. This power can be distributed to any part of the laboratories on either two or three wire lines, through a carefully planned distribution system.
Equipment is available for setting up all types of electric circuits, reactive and non-reactive, for either direct or alternating current power, together with the usual voltmeters, ammeters, and wattmeters, required in the measurement of these circuits.
Several examples of each of the fundamental types of generators and motors for both direct and alternating current, as well as the usual transformers and various special types are conveniently arranged for study and complete tests.
Special types of instruments for extreme range of voltage current and power are also available, together with special instruments such as frequency meters, power factor meters, electro-static voltmeters, oscillographs, and bridge networks for resistance, capacitance and inductance.
Provision is also made for extensive study of the fundamental operating characteristics of the vacuum tubes of many kinds which are so widely used in the control of electric power in its various forms.
The following equipment is worthy of special mention:
A General Electric Educational Set consisting of a synchronous machine; a wound-rotor induction machine; a squirrel cage induction machine; and a double-current generator, each with a 15 k v a rating and wound for either 1, 2, 3 or 6 phase operation.
A Westinghouse synchronous motor-generator set, rated at 15 k v a and wound for 1, 2, 3 or 6 phases. One machine is arranged as a cradle dynamometer and equipped for phase shifting.
A General Electric sine-wave generator coupled to a synchronous motor. This machine generates a voltage wave which conforms accurately to standard wave form. It has a capacity of 5 k v a for three phases and has a ring gear mechanism for phase shifting.
A two-unit General Electric motor-generator set consisting of one 5 k v a generator capable of single-, three- or six-phase operation at 110/220 volts. This is coupled to a 5-kw, 250-volt d-c machine.
Three mercury-arc rectifiers complete with switchboards and auxiliaries.
Three General Electric Oscillographs complete with all auxiliary apparatus.
One Westinghouse four-element Oscillograph.
One Westinghouse Osiso.
One Sundt Neobeam Oscilloscope.
One Du Mont Cathode-Ray Oscilloscope.
One Westinghouse Audio Oscillator.
One Western Electric Audio Oscillator.