Vintage Westinghouse PY5 Wattmeter, Volt, Kilowatt Meter


Dated around 1940's


STYLE: DY-23455-N3-1


SERIAL 23458


Bakelite case


19cm x 21cm x 9cm approx


Made in the USA


Sticker to the base: US Property, so previously owned by a US Government Agency, maybe military !


The Westinghouse PY5 Wattmeter, also known as a kilowatt meter, is a reliable and accurate tool used for measuring electrical power consumption. This meter is designed to measure the flow of electricity in a circuit and display the amount of power being used in watts or kilowatts. The PY5 Wattmeter is easy to read and features a clear display that shows the current power consumption of the electrical system it is connected to. This meter is essential for monitoring energy usage in residential, commercial, and industrial settings, helping users to track their electricity consumption and make informed decisions about energy efficiency and cost-saving measures. The Westinghouse PY5 Wattmeter is a trusted and durable device that provides accurate power measurements for a variety of applications.


Model: PY5

– Manufacturer: Westinghouse

– Type: Wattmeter / Kilowatt Meter

– Accuracy: +/- 1%

– Frequency Range: 50-400 Hz

– Voltage Range: 115V, 230V, 460V, 600V

– Current Range: 10A, 20A, 50A, 100A, 200A, 400A

– Power Range: 1kW, 2kW, 5kW, 10kW, 20kW, 50kW, 100kW

– Scale Length: 90 degrees

– Dimensions: 6 x 6 x 6

– Weight: 5 lbs.


Potentially in working order, but untested. 


George Westinghouse Jr. (October 6, 1846 – March 12, 1914) was an American entrepreneur and engineer based in Pennsylvania who created the railway air brake and was a pioneer of the electrical industry, receiving his first patent at the age of 19. Westinghouse saw the potential of using alternating current for electric power distribution in the early 1880s and put all his resources into developing and marketing it. This put Westinghouse's business in direct competition with Thomas Edison, who marketed direct current for electric power distribution. In 1911 Westinghouse received the American Institute of Electrical Engineers's (AIEE) Edison Medal "For meritorious achievement in connection with the development of the alternating current system".[1]He founded the Westinghouse Electric Corporation in 1886.


Good used condition for age, with some superficial wear, marks and scratches.