Direct-current metering of large electrochemical pot-lines

D-c metering of large aluminum reduction pot-lines represents a major problem. It is no easy task to get the required degree of accuracy in measuring powers of 100,000-kw direct current. Taking advantage of the magnetic-core improvement in materials made available by developments during World War II, the magnetic amplifier emerged as a tool for many applications. Among these was a major improvement of the metering accuracies for large electrochemical pot-lines. In this paper the many advantages are discussed and some conclusions reached as to the best fields of application.