Separable loadbreak design with enhanced ratings
View Patent ↗A new and improved separable loadbreak connector system capable of providing higher switching and fault close ratings by various means of dividing the arc energy within the connector system.
1. A loadbreak connector assembly for operatively associating with two spaced apart conductive portions, the loadbreak connector assembly comprising:
a first contact zone collinear with and spaced apart from a second contact zone by an insulated zone, wherein the second contact zone is mechanically fixed relative to the first contact zone,
wherein the insulated zone provides insulation and isolation relative to the first and second contact zones until immediately prior to contact of each contact zone by the two spaced apart conductive portions, breaking an electrical connection under energized circuit conditions,
whereby an arcing time of a broken electrical connection is limited.
2. The loadbreak connector assembly of claim 1 , wherein one conductive portion of the two spaced apart conductive portions comprises (a) a floating contact slidable between the first and second contact zones; and the other conductive portion of the two spaced apart conductive portions (b) a separate probe associated with an elbow connector.
3. The loadbreak connector assembly of claim 2 , wherein the said two spaced apart conductive portions are a conductive portion of the floating contact and a conductive portion of the separate probe.
4. The loadbreak connector assembly of claim 2 , wherein the second contact zone has two opposing, independent female contacts.
5. The loadbreak connector assembly of claim 2 , wherein the separate probe is in accordance with ANSI/IEEE 386.
6. The loadbreak connector assembly of claim 1 , further comprising an inner bushing assembly operatively associated with a piston assembly configured to shorten the arcing time.
7. The loadbreak connector assembly of claim 1 , wherein the two spaced apart conductive portions comprise a multi-piece probe having in sequence: a proximal conductive portion, a distal arc-quenching portion, and a distal conductive portion, wherein said two spaced apart conductive portions are the proximal conductive portion and the distal conductive portion.
8. The loadbreak connector assembly of claim 7 , further comprising an inner bushing assembly operatively associated with a piston assembly configured to shorten the arcing time.
9. The loadbreak connector assembly of claim 7 , wherein the multi-piece probe further comprises a proximal arc-quenching portion proximal of the proximal conductive portion.
10. The loadbreak connector assembly of claim 7 , wherein the second contact zone has two opposing, independent female contacts.
11. A method of reducing an arcing distance when making or breaking an electrical connection under energized circuit conditions in a power switching system, the method comprising:
spacing two contact zones of one loadbreak connector by a gap distance;
fixing the two contact zones collinearly relative to each other; and
insulating the gap distance.
12. The method of claim 11 , further placing a slidable floating contact between the first and second contact zones, wherein the floating contact has a conductive portion.