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美国铁路在过去的40年里,一直采用内燃机车牵引,但近年来由于石油的危机,开始担心柴油机用燃油的供应将成问题,而且稳定了近10年之久的燃油价格也开始涨价。加拿大太平洋铁路试验性地将一部分干线进行了电气化,不久,将在亚利桑那州的东北部开始电力牵引。这是世界上第一个采用工业电频率及50千伏的交流电压。联合太平洋铁路总经理John C.Kenefick认为,电力机车的使用寿命约为内燃机车的2
The U.S. railways have been using diesel locomotives for the past 40 years. However, in recent years, due to the oil crisis, they began to worry that the supply of diesel fuel would be a problem. Fuel prices, which have been stable for nearly 10 years, have also started to rise. The Pacific Railroad in Canada tentatively electrified part of the mainline and will soon begin electric traction in the northeastern Arizona. This is the first AC voltage in the world that uses industrial frequencies and 50 kV. John C. Kenefick, general manager of Union Pacific, believes that the service life of electric locomotives is about 2