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Re~4/_4Ⅱ是瑞士联帮铁路上运行数量最大的一种电力机车,共224台。Re~4/_4Ⅱ机车经过了一系列的性能试验和轮轨作用力测量。机车采用传统的单相交流低频电路,转向架独立传动,没有中间整流环节。高压侧调压开关有32个级位,负载转换,在最高级位时,次边无载电压为590伏。变压器的短路电压很低,在额定电流时仅为7.5%,所以牵引力—速度特性曲线较平缓。所有电压控制装置(调压开关及其传动装置,凸轮轴,四级抽头转换用的负载开关,转换电阻及保护用电流互感器)都装在变压器油箱中。
Re ~ 4 / _4II is the largest number of electric locomotives running on the Swiss joint help railway, a total of 224 units. Re ~ 4 / _4 Ⅱ locomotive after a series of performance tests and wheel-rail force measurement. The locomotive adopts the traditional single-phase AC low-frequency circuit, the bogie is driven independently and there is no intermediate rectification link. High-pressure side of the pressure switch has 32 levels, load conversion, in the most senior position, the secondary side of the no-load voltage of 590 volts. The short-circuit voltage of the transformer is very low, it is only 7.5% at the rated current, so the traction-speed characteristic curve is gentle. All voltage control devices (pressure switch and its drives, camshafts, load switches for 4-tap changeover, conversion resistors and protective current transformers) are housed in the transformer tank.