water rheostat การใช้

• The salt water rheostat operates at unity power factor and presents a resistance with negligible series inductance compared to a wire wound equivalent, and was widely used by generator assemblers, until 20 years ago, as a matter of course.
• The three-phase electrification was abandoned from March 5, 1927 when the new locomotives were placed in service between Skykomish and the east portal of the old tunnel; the time was reduced from 4 hours for a 2500-ton eastbound train to 1 hour 45 minutes for a 3500-ton train, and for the first time regenerated power could be used by another train or fed back to the utility company ( power from regenerative braking was previously dissipated in a water rheostat at the power station ).