FI116335B - Electrical connector - Google Patents

Description

116335 Electrical connector

This invention relates to electrical connectors used in insulated conductors, mainly air power lines or other outdoor locations.

10 Where conductor insulation is removed or pierced to make connections for branch conductors, arc protection devices, earthing connections or the like, there is always a tendency to develop concentrations of mechanical stress and it is therefore particularly important to protect them from the risk of corrosion due to climatic conditions. Current practice is to seal the joint to 15 pieces of insulating and protective material, which is a significant expense (especially in installation time) and increases the weight and strikingness of the joint. The invention is based in part on the knowledge that it is usually necessary to protect the conductor (instead of the connector) and the object is: *: ·. organize such protection economically and closely.

The connector of the first aspect of the invention comprises a support sleeve (preferably longitudinally spaced, in a manner known per se, to obtain: a conductor without threading at either end) having a central compression portion to provide a connection with the insulated conductor; ! *: 25 * .., · two final major components, with an inside diameter allows for a fluid-tight connection of insulation: Y: with TYN conductor to the external side of the; . *, and the intermediate portions between the central portion and the corresponding end portions having recesses; : 30 to provide a space in which the insulating material may move in place to reduce pressure and minimize insertion of the insulating material outside the connector.

2 116335

The middle may be similar to a standard clamping connector, in which part of the dielectric must be removed from the conductor before the connector is installed, or it may be a dielectric piercing connector, preferably of the type that is substantially unaltered in the conductor. ) Limited, GB2308239A.

The end portions may in some cases achieve sufficient fluid tight connection with the insulated conductor by force installation, but are preferably pressed 10 (slightly relative to the center portion) to provide or improve sealing.

If desired, the end portions may be coated (or otherwise provided) with a moldable, flexible, or viscous material for enhanced sealing, and, if soft enough, may also fill (or partially fill) the space between the kits. If they are substantially filled, and especially if they are filled with viscous rather than solid, the air in this space can be removed through channels having capillary dimensions (relative to the viscous material) so that the connector does not need to contain any air. For example · * · .. suitable materials are EVA soft structures based on polychloroprene and kerosene: * \; 20 fats or silicone greases. Fats that swell when exposed to water may: '' *: be suitable.

In other aspects of the invention, the electrical connectors as defined in claims 10 and 16 and the connection as defined in claim 21 are provided.

25 '-. * The invention will be described in the following example with reference to the accompanying drawings: -: in which:; '; Figures 1 and 2 are perspective views of the main component of the connector of the invention; · ·; 30 for use without stripping the insulation from the conductor.

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Figure 3 is an inside view of the component of Figure 1 and

Figure 4 is an enlarged transverse central section of the connector.

5 The main components of the connector are two half-sleeves 1 and 2 (Figures 1 and 2), the latter having a projection 3 formed with the same piece.

The projection may be of a conventional design, or may be replaced by a discharge horn or other desired arrangement.

10

The half sleeves 1 and 2 are generally similar. Each has a central portion 4 having cooperatively insulating piercing projections 5,6, the operation of which will be described later. At each end they have end portions 7 whose smooth smooth concave surfaces 8, when assembled, form cylindrical passageways 15 which overlie the insulation of the conductor for which the connector is designed to form a substantially watertight seal therebetween but not so tightly to a significant extent.

The end portions 7 are connected to the respective central portions 4 by intermediate portions 9, into whose recesses 10 20 the insulator displaced longitudinally by the projections 5 and 6. This protects the dielectric coupled to the concave surfaces 8 from being deformed by hazards. * · Toxic.

The third component of the connector is a channel 11 (Fig. 4) having a uniform •: 25 cross-section.

:: The half sleeve 1 is assembled at the factory by dissolving end-to-end with the channel so that it * is initially supported by the projections 12, and the assembly is deformed by slight crushing to prevent it from falling during transport.

When a connector is placed in the field on an insulated conductor (such as an insulated 30 4 116335 11 kV transmission line system conductor), this configuration is placed on top of the insulated conductor. Another puoliholkki 2 liu = then utetaan channel 11, first the dash dotted position, and a conventional press tool clamping forces puoliholkit pressed together deforming them significantly, wherein the channels of May 11 is deformed plastically so that its edge portions 13 are rotated puoliholkin two lower side around the locking indicated by solid lines in the position . The projections 5,6 are pressed into the insulator 14, which is divided into four separate strips on each side of the projections. They are dimensioned to fit in close contact with the metal conductor 15 for effective electrical contact without causing substantial deformation of the conductor or projections, thereby minimizing the concentration of the longitudinal mechanical loads on the conductor due to the insertion of the connector.

The crushing operation may be sufficient to ensure a watertight connection between adjacent surfaces of the half sleeves 1 and 15 2, but preferably they are coated with suitable grease on appropriate surfaces to provide additional seal to the gasket (in particular DEV 023 grease developed by Dussek-Cambell Ltd; petroleum jelly to which water-swellable powder has been added, but

I »I

i ·. fats currently used in industry are suitable).

• · · 20. * * *. In an alternative example, the middle portion is replaced by a smooth tube and two half; * · *: the sleeves have interlocking projections and grooves to allow dissolution; ': To connect with each other, eliminating the need for a channel member. This design requires stripping of the conductor portion, and the inside diameter is such that the conductor has a smooth sliding fit over the insulator: the central portion is normally pressed to provide electrical:: contact with the conductor and subsequently pressed slightly to form the seal required.

Claims (21)

An electrical connector comprising a sleeve, characterized in that the sleeve comprises: 5 a central compression part (4) for providing a connection with an insulated conductor; two out of the main part (7) with an inside diameter enables a fluid-tight connection of the insulated wire with the outside; 10 and intermediate portions (9) between the central portion (4) and the corresponding end portions (7) having a recess for providing a space in which the insulating material may enter to reduce pressure and minimize insertion of the insulating material outside the conductor. Connector according to claim 1, characterized in that the sleeve is longitudinally divided. Connector according to Claim 1 or 2, characterized in that the central part (4) ... consists of a piercing piece of insulation which is of such a nature that it contacts the conductor without substantially changing its shape. ! ·. : 20 ···, 4. The connector according to any one of claims 1 to 3, characterized in that • · • · ·. ': *. the end portions (7) are pressed to provide or improve sealing. * * · Connector according to any one of claims 1 to 3, characterized in that ·. ···; The remaining end portions (7) achieve fluid tight coupling with the insulated conductor * 1: simply by force matching. Connector according to any one of claims 1 to 4, characterized in that at least the end portions (7) are internally coated (or otherwise provided) with a moldable, with a flexible or viscous material to improve sealing • · 6 116335 5, 116335 A connector according to claim 6, characterized in that said material is soft and fills (or partially fills) the spaces in the central portions. Connector according to Claim 7, characterized in that said spaces 5 in the central part (4) are substantially filled with air and vented therefrom through channels with capillary dimensions (relative to the viscous material), so that the connector does not need to contain any air. A connector according to claim 1, characterized in that it further comprises 10 channels (11) for receiving the sleeve, which channel (11) has edge portions (13) which are pressed inward to provide connection with the insulated conductor. 10. Electrical connector for connection to an insulated conductor using a sleeve with an electrical connector, characterized in that the sleeve comprises: 15 a central part (4) for connection to the conductor, ... an end part (7) having an inner: and λ: 20 intermediate portion (9) disposed between said central portion (4) and said end end portion (7) with said intermediate portion (9) indented relative to said: '; the remainder (7). : ··: 25 Electrical connector according to Claim 10, characterized in that a space is formed in said intermediate part (9) into which the insulator can move. * · · »» · «» · Electrical connector according to Claim 11, characterized in that the intermediate part (9) [. _ relieves pressure and minimizes the tendency of the dielectric to protrude outside the junction. 55: 30 An electrical connector according to claim 10, characterized in that said central part (4) of said 7116335 engages with the conductor when the sleeve is pressed. Electrical connector according to Claim 10, characterized in that its central part (4) consists of an insulating piercing device which engages the conductor 5 without substantially changing the conductor shape. Electrical connector according to Claim 10, characterized in that its end part (7) is pressed to provide or improve sealing. 10 Electrical connector for connection to a conductor with an insulator, characterized in that the connector comprises: a first sleeve (1) having a central part (4), an end part (7) and an intermediate part (9) located between the middle part (4) and the end part (7) , 15 a second sleeve (2) having a central part (4), an end part (7) and an intermediate part (9) located between the middle part (4) and the end part (7):. a channel (11) for receiving the first sleeve (1) and the second sleeve (2) and: 20 for clamping the first sleeve (1) and the second sleeve (2) and the conductor • ·. * ··. attaching such a way that the central parts (4) of the conductor, loppupääosat (7) • · · formed by an internal part which is in fluid-tight engagement with the exterior of the insulator, and the intermediate elements (9) are recessed with respect to loppupääosiin (7). *: · *: 25 Electrical connector according to Claim 16, characterized in that the intermediate parts (9) form a space in which the insulator can move. Electrical connector according to Claim 17, characterized in that the intermediate parts (9) »· (reduce pressure and minimize the tendency of the dielectric to protrude outside the conductor» m t i 30. I · 116335 8 Electrical connector according to Claim 16, characterized in that the central part (4) consists of an insulating piercing means which engages the conductor without substantially changing the conductor shape. Electrical connector according to Claim 16, characterized in that the end-piece (7) is pressed there to provide or improve sealing. Connection to an insulated electric conductor, characterized in that it comprises a connector according to any one of the preceding claims. • · · • · <· · • · t «· •« · * * * * 9 963,335