Air spark gap for fixing the maximum voltage on a overvoltage suppressor

摘要

The invention relates to an air spark gap for fixing the maximum voltage on an aged overvoltage suppressor (5) which has an electrode arrangement in a capsule which is filled with inert gas. The overvoltage suppressor is arranged in an overvoltage protection plug. The air spark gap is located between two contact members (2, 3 and 4), in parallel with the overvoltage suppressor. One (2) of the contact members is electrically connected to a contact element (7) which, when the overvoltage protection plug is in the plugged-on state, rests flat in a sprung manner on the other (3, 4) of the contact members. For electrical isolation, an electrical insulating film (8) having a predetermined thickness is arranged between the contact element and the other of the contact members, which film is provided with a hole in order to form an air gap between said element and member. IMAGE