Electrical Safety Office - #Flashbackfriday Pictured is a BTH Glass Bulb Mercury Arc recifier, plus control and feeder panels used between 1927 to 1955 at Coorparoo tramway substations. The mercury arc rectifier
Mercury Arc Rectifiers
mercury-arc valve - Wikidata
Mercury Arc Valve: Most Up-to-Date Encyclopedia, News & Reviews
A short history of the mercury-arc rectifier
How Mercury Arc Valve Rectifiers Work
Mercury Arc Valve: Most Up-to-Date Encyclopedia, News & Reviews
Two mercury-arc valve rectifiers : r/MachinePorn
This is a mercury arc rectifier, it was used in trains to convert 20000 volts of AC to 800 volts of DC that its used in electric trains : r/MachinePorn