Switch combination esp. for transformers on ring mains - incorporates vacuum switch which cannot be closed is load isolator with energy store is already engaged

摘要

A load-isolating switch (1) with an energy store (5), having springs actuated by a rod (41), is connected in series with a simplified vacuum switch chamber (2) serving as an automatic fuse to interrupt short-circuit and other fault currents. - The moving contact (3) of the vacuum switch is driven by a spring (16) from a trip device (4) released magnetically by a current transformer (6, 7), or by a hand lever (26). The energy stores (4, 5) are mechanically coupled (8a-8c).