Fusible switch assemblies, and load base assemblies, line base assemblies, line bus connector assemblies, fuse clip assemblies, fuse clip and lug assemblies, and operational methods thereof

Patent metadata

Field	Value
Publication number	US-9368296-B2
Application number	US-201414484543-A
Country	US
Kind code	B2
Filing date	Sep 12, 2014
Priority date	Sep 12, 2014
Publication date	Jun 14, 2016
Grant date	Jun 14, 2016

Abstract

A fusible switch assembly including a line base assembly and load base assembly is disclosed. Line base assembly includes a low-profile fuse clip assembly and line bus connector assembly with single-piece connector body and sliding nuts. Load base assembly includes a fuse clip and lug assembly having a lug body including a multiple lugs and a fuse clip at least partially formed by the lug body. Line base assemblies, load base assemblies, fuse clip assemblies, line bus connector assemblies, fuse clip and lug assemblies, and methods of operating line base assemblies are provided, as are other aspects.

First claim

What is claimed is:

1. A load base assembly, comprising:
a load base; and
one or more fuse clip and lug assembly coupled to the load base, the fuse clip and lug assembly including:
a lug body including a first lug configured to receive a first electrical wire, and a second lug configured to receive a second electrical wire,
first and second slide features formed in the lug body,
first and second sliding nuts configured to be received in the slide first and second slide features, and
a fuse clip at least partially formed by the lug body between the first lug and the second lug,
wherein the fuse clip includes a domed support surface to prevent plastic deformation of a spring member and allow elastic deformation of the spring member, and
wherein one end of the first and second sliding nuts include one or more stops that interface with and abut the lug body and function to limit an amount of insertion of the first and second sliding nuts into the first and second slide features.

2. The load base assembly of claim 1 , comprising three of the fuse clip and lug assembly, one attached at each of three spaced locations on the load base.

3. The load base assembly of claim 1 , wherein the fuse clip comprises a fuse rejection element having a crossbar that registers in a first slot formed in the lug body.

4. The load base assembly of claim 1 , wherein the fuse clip includes a moveable portion comprising a leaf spring, and a fuse rejection element including a crossbar received in a pocket of the leaf spring.

5. The load base assembly of claim 1 , wherein the fuse clip includes a leaf spring as the spring member and the domed support surface spaced from the leaf spring by a gap sufficient to prevent plastic deformation of the leaf spring.

6. The load base assembly of claim 1 , wherein the fuse clip comprises an anti-walkout feature comprising a lip formed on a portion of the lug body configured to prevent a tang of a fuse adapted to be receivable in the fuse clip from walking out of the fuse clip.

7. The load base assembly of claim 1 , comprising a barrier assembly including barriers and an interconnecting bridge, the interconnecting bridge including one or more base registration features that register on one or more bosses formed on an upper surface of the load base.

8. A line base assembly, comprising:
a line base;
a line bus connector assembly coupled to the line base, the line bus connector assembly including:
a single-piece connector body including a first body portion and a second body portion extending from the first body portion and being thinner than first body portion, first and second line lugs formed in the first body portion, and first and second slide features formed in the single-piece connector body,
first and second sliding nuts configured to be received in the first and second slide features, and
stationary contacts coupled to the second body portion; and

a fuse clip assembly configured to receive a fuse, the fuse clip assembly including:
a clip body including a front side, a back side, and an underside, wherein the clip body is a single piece,
a fuse clip formed in the clip body having a first clip side extending from the front side to the back side and a moveable clip side, and
stationary contacts attached to, and extending downward from, the underside of the clip body, and wherein the stationary contacts are positioned within a projected footprint of the clip body,
wherein the fuse clip includes a domed support surface to prevent plastic deformation of a spring member and allow elastic deformation of the spring member, and
wherein one end of the first and second sliding nuts include one or more stops that interface with and abut the lug body and function to limit an amount of insertion of the first and second sliding nuts into the first and second slide features.

9. A line base switch assembly including the line base assembly of claim 8 and a rotor assembly mounted for rotation relative to the line base.

10. A line bus connector assembly, comprising:
a single-piece connector body including a first body portion and a second body portion extending from the first body portion and being thinner than first body portion, first and second line lugs formed in the first portion, and first and second slide features formed in the single-piece connector body;
first and second sliding nuts configured to be received in the first and second slide features; and
stationary contacts coupled to the second body portion,
wherein a fuse clip includes a domed support surface to prevent plastic deformation of a spring member and allow elastic deformation of the spring member, and
wherein one end of the first and second sliding nuts include one or more stops that interface with and abut a lug body and function to limit an amount of insertion of the first and second sliding nuts into the first and second slide features.

11. The line bus connector assembly of claim 10 , wherein an outside thickness and configuration of the first body portion and the second body portion is extruded.

12. A fuse clip assembly, comprising:
a clip body including a front side, a back side, and an underside, wherein the clip body is a single piece;
a fuse clip formed in the clip body having a first clip side extending from the front side to the back side and a moveable clip side; and
stationary contacts attached to, and extending downward from, the underside of the clip body, and wherein the stationary contacts are positioned within a projected footprint of the clip body,
wherein the fuse clip includes a domed support surface to prevent plastic deformation of a spring member and allow elastic deformation of the spring member, and
wherein first and second sliding nuts configured to be received in first and second slide features respectively and one end of the first and second sliding nuts include one or more stops that interface with and abut a lug body and function to limit an amount of insertion of the first and second sliding nuts into the first and second slide features.

13. The fuse clip assembly of claim 12 , wherein the clip body includes a first flange and a second flange extending in opposite directions.

14. The fuse clip assembly of claim 13 , comprising registration features provided on the flanges that are configured to register with a feature on a line base.

15. The fuse clip assembly of claim 12 , wherein the clip body includes fins extending from a side of an upright including the first clip side.

16. A fusible switch assembly, comprising:
a load base assembly including:
a load base; and
one or more fuse clip and lug assembly coupled to the load base, the fuse clip and lug assembly including:
a lug body including a first lug configured to receive a first electrical wire, and a second lug configured to receive a second electrical wire,
first and second load slide features formed in the lug body,
first and second load sliding nuts configured to be received in each of the first and second load slide features, and
a fuse clip at least partially formed by the lug body between the first lug and the second lug; and

a line base assembly including:
a line base;
a line bus connector assembly coupled to the line base, the line bus connector assembly including:
a single-piece connector body including a first body portion and a second body portion extending from the first body portion and being thinner than first body portion, first and second line lugs formed in the first portion, and first and second line slide features formed in the single-piece connector body,
first and second

Assignees

• Siemens Industry Inc

Inventors

• Holland Michael J
• Jameson Thomas

Classifications

• H01R13/15 Primary

  Pins, blades or sockets having separate spring member for producing or increasing contact pressure · CPC title

• H01H85/00

  Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive (switches actuated by melting of fusible material H01H37/76; disposition or arrangement of fuses on boards H02B1/18) · CPC title

• H01R4/36

  Conductive members located under tip of screw · CPC title

• H01H9/00 Primary

  Details of switching devices, not covered by groups H01H1/00 - H01H7/00 · CPC title

• H01H85/153

  Knife-blade-end contacts · CPC title