Improvements in Mercury Arc Rectifiers

An improved design of section for the sectional mercury arc rectifier is described, together with the manner of assembling into the sectional unit. The paper includes also a brief description of the auxiliaries used. The units being supplied to the Board of Transportation, for the Fulton Street section of the independent subway system in New York City, are described specificaltyy. Performance characteristics, which incluide arc voltage curves, determined from both laboratory tests and operating service are given. Factors determining design features are discussed.