| 摘要 |
A safety stopper (418) coded to a rated current value with an interchangeable fuse-wire-insert is arranged in the switch rocker (413) of a safety switch unit and cooperates with a rated current lock (430) correspondingly coded and secured to the housing. A rated current key (500) of the safety stopper (418) is connected to the rated current lock (430) which is lockable in the switching rocker (413) and held in a lock holder (402) secured to the housing. An arrester device stops the empty switching rocker (413) in a switch-off position and may be released by the safety stopper (418) in response to a prestressed spring. Two switching contacts of the safety stopper (413) set the contact caps of the safety insert in contact and the switching contacts of the housing in a switch-on position. Advantages: simple adaptation to rated current plugs, impossibility to invert the rated current provided only by the replacement of the rated current lock (413) and the safety stopper (418), switching action between switch contacts and switch contacts of the housing protecting the contact caps against mechanical wear and erosion due to the sparks. |
