Following the launch of the R 9250 excavator at bauma 2007 and the presentation of the first shovel version at M IN Expo 2008, Liebherr is now making this successful model available with an electric drive unit option. Significant fuel price increases during recent years have led many mining operations to investigate alternative energy sources. In designing this latest option, Liebherr engineers drew upon many years of experience gained from the deployment of the company's electrical excavators worldwide. In particular, experience with the R 9350 Electric has been applied in the development of the R 9250E. The new model supplies a nominal motor output of 1,050 kW (nominal excavator power of 1,100 kW) in 6,000-v and 50-Hz networks. The AC squirrel cage motor, according to the company, requires minimal maintenance so that uptime and machine utilization are significantly greater. All electrical installations are protected on IP 55 EN 60529 Standard and the electrical compartments are sealed and secured to withstand harsh mining conditions.
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机译：继在bauma 2007上推出R 9250挖掘机并在M IN Expo 2008上展示了第一款铲土机之后，利勃海尔现在正在为这款成功的机型提供电动驱动选件。近年来，燃油价格的大幅上涨已导致许多采矿业对替代能源进行调查。在设计此最新选项时，利勃海尔的工程师汲取了公司在全球范围内部署电动挖掘机所获得的多年经验。特别是，R 9350 Electric的经验已应用于R 9250E的开发中。在6,000-v和50-Hz网络中，新型号可提供1,050 kW的额定电动机输出（挖掘机的额定功率为1,100 kW）。据该公司称，交流鼠笼电动机只需要很少的维护，因此正常运行时间和机器利用率都大大提高了。所有电气装置均受IP 55 EN 60529标准保护，电气室已密封并固定以承受恶劣的采矿条件。
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