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Alternate drive for a paper machine lineshaft

The #2 Paper Machine at Sappi's Skowhegan, Maine Plant (USA) started up in September of 1986. It is a 300 inch wide coated free sheet paper machine driven by a 450 foot long lineshaft. Powering the lineshaft is a 4500 horsepower steam turbine. Due to an electrical power failure in 1996, the machine's lineshaft oversped and substantial damage occurred to the turbine's rotor and stator. This paper describes how five weeks of paper machine downtime was avoided by replacing the turbine with a 4000 horsepower electric motor.