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Summary
In the late 1800s, companies that supplied electricity to consumers needed a way to measure how much customers used -- and then charge them accordingly. Paul McGahan, a Westinghouse electrical engineer created a practical polyphase wattmeter in 1899 to measure electric power usage. This design was adopted by other companies and remained a standard well into the mid-1900s.
“Polyphase” means “many phases,” describing a form of AC electrical system where multiple sinusoidal voltages exist that are not in step with each other. The most common form of polyphase AC power in industry is three-phase, but all polyphase systems share similar traits. A good way to understand three-phase AC systems is. 34434B Meter Description. Polyphase 34434b 1902 Westinghouse Pat. Great condition, the latch works, comes with the instruction manual with serial number, original meter connections chart, hand drawn charts from the 1930s and some of the original cables that have become a little brittle from age. Date and a first calibration date of the leather. Figure 3-4 MDFT filter bank realized by two DFT polyphase filter banks 11 Figure 3-5 Computational efficiency realization of the MDFT Filter Bank 12 Figure 3-6 Structure of Cosine Modulated polyphase filter bank 14 Figure 4-1 Implementation result of DFT filter bank: Chirp input signal.
In the late 1800s, companies that supplied electricity to consumers needed a way to measure how much customers used -- and then charge them accordingly. Paul McGahan, a Westinghouse electrical engineer created a practical polyphase wattmeter in 1899 to measure electric power usage. This design was adopted by other companies and remained a standard well into the mid-1900s.
Date Made
1903-1906
Creators
Place of Creation
Collection Title
On Exhibit
at Henry Ford Museum in Made in America
Object ID
29.1333.16
Credit
From the Collections of The Henry Ford. Gift of Westinghouse Electric and Manufacturing Company.
Material
Metal
Color
Polyphase Wattmeter Pdf File
Black (Color)
Dimensions
Polyphase Wattmeter Pdf Online
Height: 12 in
Polyphase Wattmeter Pdf Free
Width: 7 in
Length: 4.5 in
Inscriptions
on front:WESTINGHOUSE, ELEC & MFG. CO. / PITTSBURG, PA., U.S.A.POLYPHASE / WATTMETER
Discover curious connections between artifacts.
Learn MoreThese are some of my meters and testequipment. Click on the pictures for more information on each item.Last updated 22nd December 2018
Polyphase Wattmeter Pdf Download
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