Swaged connectors for a grounding grid
A family of swaged connectors has particular application for joining segments of copper cable that make up a subterranean grounding grid in an electrical utility substation. The connectors have a body member with at least one swage region having a trough for receiving an electrical conductor. The swage region has an opening extending the length of the trough to allow insertion, in a radial direction, of the electrical conductor into the trough. An insert is configured for mating engagement with the opening in the swage region, such that, when the insert is mated with the body member, an electrical conductor disposed within the trough is radially entrapped in the connector. The connector body and insert have a cylindrical outer surface in the swage region to facilitate swaging the connector to secure it to the electrical conductor. The connector may be configured as a lap splice, tee or elbow.
1. A connector comprising:
a body member with first and second swage regions having respective first and second troughs for receiving respective electrical conductors, the body member having first and second openings extending a length of the respective troughs to allow insertion, in a radial direction, of respective electrical conductors into the respective troughs;
first and second inserts, each configured for mating engagement with a respective one of the openings such that, when the inserts are mated with the body member, the electrical conductors disposed within the troughs are radially entrapped in the connector.
2. The connector of claim 1 wherein the first and second swage regions are disposed at right angles to one another.
3. The connector of claim 1 wherein the first and second swage regions are coaxial and wherein the body member further comprises a tap portion having a cylindrical opening for receiving an additional electrical conductor.
4. The connector of claim 3 wherein the tap portion is disposed perpendicular to the two swage regions in a tee configuration.
5. The connector of claim 1 wherein the first and second troughs are oriented parallel to one another.
6. The connector of claim 1 wherein a transverse cross-section of the trough defines a first circular arc.
7. The connector of claim 6 wherein each insert has a trough with a transverse cross-section defining a second circular arc complementary to the first circular arc.
8. The connector of claim 1 wherein the body member and inserts have corresponding keying surfaces such that the inserts are axially insertable into the body member and are radially retained therein.
9. A method of attaching the connector of claim 1 to first and second electrical conductors comprising:
inserting the first electrical conductor into the first trough of the body member;
inserting the second electrical conductor into the second trough of the body member;
inserting the two inserts into the respective openings;
compressing the swage regions radially inwardly with a swaging tool.