IEC 60335-2-91:2008涉及电动步行式、手持式草坪修剪机和草坪边缘修剪机的安全性，其切割元件为非金属丝线或自由旋转的非金属切割器，每个切割器的动能不超过10 J，由站立的操作员用于割草，其交流或直流额定电压不超过250 V。本版本的主要变化包括第18条中修订的耐久性试验；附录B，允许使用电池供电的微调器；以及增加关于振动、噪声和安全说明的资料性附录BB、CC和EE。

IEC 60335-2-91:2008 deals with the safety of electric powered walk-behind and hand-held lawn trimmers and lawn edge trimmers, with cutting element(s) of non metallic filament line or freely pivoting non metallic cutter(s), with a kinetic energy of not more than 10 J each, used by a standing operator for cutting grass, their rated voltage being not more than 250 V for a.c. or 50 V d.c. Main changes in this edition include the revised endurance test in Clause 18; Annex B, which allows for battery-powered trimmers; and addition of informative Annexes BB, CC and EE on vibration, noise and safety instructions.