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| View Original: | National_Bureau_of_Standards_high_voltage_laboratory.png (810x1275) | |||
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| Keywords: National Bureau of Standards high voltage laboratory.png en High voltage laboratory at the U S National Bureau of Standards Washington DC USA in 1948 The caption of the image in the source is A special 6-story laboratory at the Bureau houses a 1 400 000 volt x-ray generator rear and a 1 050 000 volt cascade transformer foreground The latter is used for testing and calibrating commercial power equipment as well as for producing simulated lightning used in investigating protective measures in installations and aircraft The cascade transformer is shown in operation producing a long electric spark The luminous glow visible on the wires carrying the high voltage is called corona discharge and is caused by electricity leaking into the air The cascade transformer in the black column right that generates the high voltage consists of several transformers connected in cascade with each successive transformer at the secondary potential of the previous one so no single transformer winding will have to withstand the full output voltage 1948 Downloaded 2012-01-24 from http //books google com/books id 2d1th30kedoC pg PR103 E U Condon 1949 Annual Report of the National Bureau of Standards for 1948 U S Government Printing Office Washington DC USA p xiv on Google Books author PD-USGov Uploaded with UploadWizard High-voltage Electric arc National Bureau of Standards | ||||
