PROTECTIVE PLUG FOR A DISTRIBUTOR STRIP UTILIZED IN TELECOMMUNICATIONS SYSTEMS, PARTICULARLY IN TELEPHONE PRIVATE BRANCH EXCHANGES

摘要

A housing for a protective plug including a surge arrester is composed of a pedestal-like lower portion and of an upper portion which is joined of one piece thereto via film hinges. The upper portion is preferably composed of two halves that, for closing the protective plug housing are pivoted towards one another and mechanically joined to one another by appropriate interlock elements. The lower portion contains receptacle chambers for contacts that, proceeding from a base, comprise a double spring contact downwardly in the plug-in direction and a clamp terminal in the upward direction. Three identical contacts are present that are each respectively connected via their clamp terminals to terminal pins of the surge arrester. A pin-shaped projection extends from the upper side of a distributor strip to serve as cooperating contacts for the double spring contacts. Each such contact also has a pin-shaped projection extending from the bottom side for connection to switching equipment. Also, such pin-shaped contacts may be insulation-pierce contacts. The contact element comprises an offset between the center line of the double spring contact and the actual terminal of the terminal legs of the surge arrester that are in alignment. Given receptacle chambers that are arranged offset relative to one another, the surge arrester can be introduced thereinto on a straight line without a deformation of its terminal legs adapted thereto when the individual contact elements are introduced into the receptacle chambers in a defined, mutually turned position.