Interference suppressed electric hand tool - has unbalanced noise voltage suppressor between live and touchable metal parts satisfying relevant safety regulations

摘要

The electric hand tool includes a noise source, e.g. a motor, to which at least one capacitor is connected in parallel for balanced noise suppression. Unbalanced interference voltages between a live part (18) and an exposed metal component (3). The suppression component may meet the regulations for double insulation. Two insulating boards of at least 1mm thickness may be provided such that the surface leakage current paths between inner, middle and outer metal plates are at least 4mm.