Electrical varistor protection unit for protection of e.g. inverter of solar plant against indirect lightning strike and overvoltage, has indication units comprising visible window and display, and lever lying behind display

摘要

The unit (1) has a spring (5) i.e. screwable pressure spring, supported at a housing (3) and a springy prestressed lever (4), which is made of conductor board material. Separation indication units are provided for power guiding connection wires (10, 12) or strands of a varistor (2) and comprise a visible window (8) and a color display (9) at the lever. The display is separated from the housing. The lever lies behind the display in the housing in a swiveling position of the lever. The window is arranged in the housing, where an end of the housing lies opposite to the wires.