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1991／92年美国GM公司的EMD和德国Siemens公司联合制造了首批4台采用了交流驱动系统的内燃机车。这些机车装用3900英制马力（2900kW）的柴油机，起动牵引力为780kN，相当于0．45的粘着系数，持续牵引力为556kN。在美国铁路协会的普韦布洛运输试验中心进行了广泛的试验之后，新一代的SD60MAC机车目前已经在伯灵顿北方铁路投入日常运用。本文对电气设备及试运行情况进行了详细说明。
1991/92 GM of the United States GM’s EMD and Siemens of Germany jointly manufactured the first four diesel locomotives with AC drives. These locomotives were fitted with a 3900-hp (2900kW) diesel engine with a starting traction of 780kN, corresponding to an adhesion coefficient of 0.45 and a sustained traction of 556kN. Following extensive testing at the American Railroad Association’s Pueblo Transportation Testing Center, the new generation of SD60MAC locomotives are now in daily operation at the Burlington North Railway. This article describes the electrical equipment and commissioning in detail.