Magnetic release unit for electrical protective switch that protects electrical system, has swivelable elements arranged at two sides of yoke and rotatable about pivotable axis, where elements are mechanically coupled with one another

摘要

The unit has a yoke (12), and swivelable elements (18, 20) arranged at two sides of the yoke and rotatable about a pivotable axis (24). The swivelable elements are mechanically coupled with one another, and holding elements (22) are supported at the pivotable axis in a rotatable manner. The swivelable elements are fixed at the holding elements and are formed of ferromagnetic material. A spring element (25) exerts force (F) on the swivelable elements. A clearance (d) between the yoke and the swivelable elements is changeable by rotation of one of swivelable elements.