SK65796A3 - Sealed terminal for a coated open wire - Google Patents

Abstract

The invention relates to a sealed terminal for a coated open wire, comprising a body member (1) and a conical fastening sleeve (2) connected therewith as well as a clamp element (3) for fastening the terminal to an insulator. The body (1) is provided with a wire-end receiving space (9) included in the axial extension of said sleeve-like fastening socket (2). The body (1) is provided with screws for providing an electrical contact between the wire end inserted in said space (9) and the body (1). A coupling element (4) can be used for clamping a branch wire into contact with the body member (1). The tensile load of a wire is taken up by means of wedge elements (7) included in the conical sleeve (2).

Description

Technical field

The invention relates to a sealed terminal for an outer conductor with an insulating layer consisting of a body, a clamping element contained in the body for fastening the terminal to an insulator, a coupler for connecting a branching conductor and a sleeve fastening socket provided with fastening elements for accepting mechanical stress on the conductor.

BACKGROUND OF THE INVENTION

When using these terminals, the insulation is removed from a certain part of the conductor end and the sealing is carried out by means of separate protectors, e.g. a shrink plastic that surrounds the junction between the terminal and the conductor.

The branching conductor is connected by means of a separate coupling or cable clamps, which must be attached to the conductor by a tool.

The use of the hitherto known terminals results in poor electrical contact, since they have many connecting transition points. Known terminals comprise at least 3 to 4 transfer resistors formed by transitions. Furthermore, the known terminals are relatively long and therefore difficult to assemble.

It is an object of the present invention to provide an improved sealed terminal which can be used as a known self-fixing sleeve to accommodate the stresses of the conductor while reducing the number of transmission resistors to at least two and reducing the terminal length to facilitate assembly.

SUMMARY OF THE INVENTION

Said object is achieved by a sealed terminal for an outer conductor with an insulating layer consisting of a body, a clamping element contained in the body for fastening the terminal to the insulator, a coupler for connecting the branch conductor and a sleeve fixing socket; provided with fastening elements for receiving the mechanical stress of the conductor according to the invention, characterized in that the body is provided with a conductor insertion space formed in the axial extension of the sleeve mounting socket as well as elements protruding into the insertion space of the conductor the contact between the end of the conductor and the body, and wherein the branch conductor clutch partly consists of the body and partly a separate connecting element, so that the branch conductor is connectable between the connecting element and the body.

Preferred embodiments are described in the dependent claims.

Overview of the figures in the drawing

Exemplary embodiments of the terminal of the present invention are illustrated in the accompanying drawing, wherein FIG. 1 shows a terminal according to the invention in side and partial section, and FIG. 2 is a plan view of the same terminal.

DETAILED DESCRIPTION OF THE INVENTION

The terminal consists of a body 1 which is made of profiled aluminum and provided with a fastening element 3 for attaching the terminal to the insulator.

The body 1 is provided with a longitudinal extension, which is a sleeve-like fastening socket 2, consisting of a conical sleeve provided inside with wedge-shaped elements 7 gripping the conductor surface. A spring 8 is used to bias the wedge elements 7 towards the tapering direction of the cone 2, and so by compressing the spring 8 after insertion of the conductor, the wedge elements 7 can loosen. When the conductor is pulled out, the wedge elements 7 grip the surface of the conductor with great force and create a locking device which assumes the mechanical tensile stress.

Such sleeve fixing sockets are known. According to the invention, however, a new type of body assembly 1 is used. Therefore, the body 1 is provided with a conductor insertion space 9 which lies in the axial extension of the sleeve mounting socket 2. The body 1 has threaded holes provided with torque screws 10. and secure the electrical contact once the screws 10 tighten against the conductor end within the space 9.

From the perspective of the connecting branch conductor, the body 1 is seated with the connecting element 4 (in the present case two elements side by side) by means of screws 14. The connecting elements 4 and the body 1 are provided with a first pair of clamping jaws. break through the insulation of the driver.

The second pair of clamping jaws is provided with engagement or contact surfaces 6 between which a lightning arrester or a working ground conductor can be mounted. The toothing 5 may be of sufficient length to puncture the insulation of the tapping conductor and therefore the tapping insulation of the tapping conductor may not contract.

The fastening cone 2 is fixed to the body as follows. The base of the fixing cone or sleeve 2 is surrounded by a clamping ring 11, which is fastened by screws 13 to the arms 15 lying on the bottom of the body T The base of the fixing cone or sleeve 2 is provided with an annular bulge or projection 12 mounted between the bottom of the body 1 and the clamping ring U. Thus, this annular projection 12 engages behind the clamping ring 11 and transmits the mechanical stress of the conductor from the sleeve or cone 2 to the clamping ring 11, from which the stress or load is transmitted by the screws 13 to the body part 1.

However, the electrical contact need not be transmitted through a transition point between the sleeve or cone 2 and the body portion 11, but the electrical contact is made directly on the aluminum body 1 because the end of the conductor is located inside the space 9.

The wedge-shaped elements may be provided with a toothing that can pierce the conductor insulation. This solution is particularly suitable when the body 1 and the fastening cone 2 are made in one piece.

Thus, the insulation does not have to be removed from the end of the conductor, but sufficient electrical contact is achieved by means of a toothing capable of breaking the insulation.

Claims (8)

PATENT CLAIMS A sealed terminal for an insulated outer conductor, comprising a body (1), a clamping element (3) contained in a body (1) for attaching a terminal to an insulator, a connector (4, 5, 14) for connecting a branch conductor and a sleeve mounting a receptacle (2) provided with fastening elements (7) for accepting the mechanical stress of the conductor, characterized in that the body (1) is provided with a space (9) for inserting the end of the conductor formed in the axial extension of the sleeve fastening receptacle (2) as elements (10) protruding into the driver insertion space (9) to make electrical contact between the wire end and the body (1) and wherein the branching conductor coupling (4, 5, 14) partly consists of the body (1) and partly a separate connecting element (4) so that the branch conductor is connectable between the connecting element (4) and the body (1). End piece according to claim 1, characterized in that the connecting element (4) and the body (1) are provided with a first pair of jaws having engagement surfaces equipped with a toothing (5) capable of breaking the conductor insulation and a second pair of jaws equipped with engagement or contact surfaces (6) between which a lightning arrester or a working earth conductor can be attached. The end-piece according to claim 1, characterized in that the lower part of the sleeve fixing socket (2) is surrounded by a clamping ring (11) fastened by screws (13) to the bottom (15) of the body (1) and between the bottom (15) and the clamping ring. the ring (11) is an annular protrusion (12) formed in the sleeve mounting socket (2), the projection transmitting the mechanical stress of the conductor from the socket (2) to the clamping ring (11), from which the stress from the load is transmitted by screws (13) body (1). End piece according to claim 1, characterized in that the electrical contact forming elements (10) are torque screws housed in threaded holes formed in the body (1). End piece according to claim 1 or 3, characterized in that the sleeve fixing socket (2) consists of a conical sleeve known per se, provided with spring-loaded wedge-shaped elements (7) which grip the conductor surface. End piece according to one of Claims 1 to 5, characterized in that the body (1) is made of profiled aluminum. The terminal according to claim 5, characterized in that the wedge-shaped elements (7) are provided with a toothing for breaking the conductor insulation. End piece according to claim 7, characterized in that the body (1) and the fixing cone (2) are made in one piece.