Fuse holder for an electric switch

• US 5,559,489 A
• Filed: 09/13/1994
• Issued: 09/24/1996
• Est. Priority Date: 09/13/1994
• Status: Expired due to Term

• Current Assignee: Square D Company (Schneider Electric SE)
• Original Assignee: Square D Company (Schneider Electric SE)
• Inventors: Weiden, Conrad
• Primary Examiner(s): Tolin, Gernald P.
• Assistant Examiner(s): RYAN, STEPHEN
• Application Number:
  US08/305,375
• Time in Patent Office: 742 Days
• Field of Search: 337/186, 337/187, 337/297, 337/190, 337/201, 337/211, 337/213, 361/833, 361/835, 361/642, 361/646
• US Class Current: 337/215
• CPC Class Codes: H01H 85/0208 Tools for inserting and removing fuses
• CPC Class Codes: H01H 85/202 for fuses with ferrule type end contacts
• CPC Class Codes: H01H 85/205 Electric connections to contacts on the base
• CPC Class Codes: H01H 9/10 Adaptation for built-in fuses mounting switch and fuse separately on, or in, common support H02B1/18

Abstract

The present invention provides a fuse holder as part of an integrated switch base assembly for attachment to a fusible switch having one or more phases between the line and load side of a circuit. The fusible switch has a switch base assembly for opening and closing a switch contact. The switch base assembly has a mounting surface. The fuse holder includes a generally planar base made of electrically-insulating material. The base has a top and bottom face. The top face has a plurality of upstanding walls integrally formed therewith which define a compartment corresponding to each phase. The bottom face has a contoured surface adapted to abut the mounting surface of the switch base assembly. A first and second fuse clip correspond to each phase and are secured on opposite ends of the top face within the compartment. A terminal connects to the load side of the circuit and electrically and mechanically connects to the first fuse clip. The fuse holder includes an elongated connector having two ends. One end of the connector electrically and mechanically connects to the second fuse clip. The opposite end of the connector is adapted to electrically connect to the switch contact and the line side of the circuit. The fuse holder secures the base to the mounting surface of the switch base assembly.

Claims

1. A fuse holder for attachment to a fusible switch having one or more phases between the line and load side of a circuit, the fusible switch having a switch base assembly for opening and closing a switch contact, the switch base assembly having a mounting surface, the fuse holder comprising:

a generally planar base made of electrically-insulating material, the base having a top and bottom face, the top face having a plurality of upstanding walls integrally formed therewith which define a compartment corresponding to each phase, the bottom face having a contoured surface adapted to abut the mounting surface of the switch base assembly, bottom face having a plurality of upstanding tabs integrally formed therewith which define a u-shaped channel corresponding to each phase, the channel extending across the bottom face of the base and having a cross-sectional size sufficient to accommodate the elongated connector therethrough, the plurality of upstanding tabs being adapted to abut the mounting surface of the switch base assembly;

a first and second fuse clip corresponding to each phase, the first and second fuse clip being secured on opposite ends of the top face within the compartment;

terminal means for connecting to the load side of the circuit, the terminal means electrically and mechanically connecting to the first fuse clip;

an elongated connector having two ends, one end of the connector electrically and mechanically connecting to the second fuse clip, the opposite end of the connector being adapted to electrically connect to the switch contact and the line side of the circuit;

means for securing the base to the mounting surface of the switch base assembly, the securing means being coupled to the base.

2. The fuse holder defined in claim 1 wherein the position of the terminal means and the position of the opposite end of the elongated connector being adapted to connect to the switch contact are juxtaposed.

3. The fuse holder defined in claim 1 wherein the fuse holder further includes a fuse puller retractably positioned between the upstanding walls of the compartment, the fuse puller having a fuse flange being adapted to engage a fuse, one end of the fuse puller extending above the upstanding walls whereby the fuse puller is manually accessible to retractably move the fuse upward.

4. The fuse holder defined in claim 1 wherein the compartment further includes a plurality of prongs upstanding from the top face of the base within the compartment, each prong having an undercut between the top face and the end of the prong to define a retaining flange, the undercut of each prong being adapted to retain the edges of each fuse clip and prevent movement of the fuse clip.

5. The fuse holder defined in claim 1 wherein the securing means includes a flange integrally formed with and extending outwardly from one of the upstanding walls of the compartment, the flange being adapted to abut a corresponding flange having a fastener which secures to the switch base assembly.

6. The fuse holder defined in claim 1 wherein the elongated connector is an insulated cable having a fastener on both ends.

7. The fuse holder defined in claim 1 wherein the base further includes a connector aperture therethrough, the connector aperture being positioned near the first fuse clip and having sufficient size to allow the elongated connector passage therethrough.

8. The fuse holder defined in claim 1 wherein the one of the upstanding walls further includes an aperture being positioned near the second fuse clip, the aperture allowing the terminal means to extend through the upstanding wall for electrical connection outside of the compartment.

9. The fuse holder defined in claim 1 wherein the fuse holder is suitable for use with 30 amp and 60 amp J-type fuses without changing the dimensions of the fuse holder.

10. An integrated switch base assembly for terminals connecting a fusible switch having one or more phases between the line and load side of a circuit, the assembly comprising:

an assembly base formed of electrically insulating material and having a mounting surface;

first terminal means for connecting to the line side of the circuit, the first terminal means being secured to the assembly base;

second terminal means being secured to the assembly base;

a switch contact for electrically and mechanically connecting in a reversible manner the first terminal means to the second terminal means, the switch contact being secured to the base assembly; and

a fuse holder having;

a generally planar base made of electrically-insulating material, the base having a top and bottom face, the top face having a plurality of upstanding walls integrally formed therewith which define a compartment corresponding to each phase, the bottom face having a contoured surface adapted to abut the mounting surface of the assembly base, the bottom face having a plurality of upstanding tabs integrally formed therewith which define a u-shaped channel corresponding to each phase, the channel extending across the bottom face of the base and having a cross-sectional size sufficient to accommodate the elongated connector therethrough, the plurality of upstanding tabs being adapted to abut the mounting surface of the base assembly;

a first and second fuse clip corresponding to each phase, the first and second fuse clip being secured on opposite ends of the top face within the compartment;

third terminal means for connecting to the load side of the circuit, the third terminal means electrically and mechanically connecting to the first fuse clip;

an elongated connector having two ends, one end of the connector electrically and mechanically connecting to the second fuse clip, the opposite end of the connector electrically and mechanically connecting to the second terminal means; and

means for securing the base to the mounting surface of the base assembly, the securing means being coupled to the base.

11. The assembly defined in claim 10 wherein the position of the third terminal means and the position of the opposite end of the elongated connector connecting to the second terminal means are juxtaposed when the means secures the base to the mounting surface of the base assembly.

12. The assembly defined in claim 10 wherein the base further includes a connector aperture therethrough, the connector aperture being positioned near the first fuse clip and having sufficient size to allow the elongated connector passage therethrough.

13. A fusible switch for one or more phases between the line and load side of a circuit, the switch comprising:

an enclosure defining a switch interior formed by sidewalls, a backwall, and a frontwall, the frontwall having a cover removably connected thereto;

an assembly base formed of electrically insulating material, the assembly base having a generally planar mounting surface and being secured to one of the walls of the enclosure;

first terminal means for connecting to the line side of the circuit, the first terminal means being secured to the assembly base;

second terminal means being secured to the assembly base;

a switch contact for electrically and mechanically connecting in a reversible manner the first terminal means to the second terminal means, the switch contact being secured to the base assembly and having a handle accessible from the exterior of the enclosure; and

a fuse holder having;

a generally planar base made of electrically-insulating material, the base having a top and bottom face, the top face having a plurality of upstanding walls integrally formed therewith which define a compartment corresponding to each phase, the bottom face having a contoured surface adapted to abut the mounting surface of the base assembly, the bottom face having a plurality of upstanding tabs integrally formed therewith which define a u-shaped channel corresponding to each phase, the channel extending across the bottom face of the base and having a cross-sectional size sufficient to accommodate the elongated connector therethrough, the plurality of upstanding tabs being adapted to abut the mounting surface of the base assembly;

a first and second fuse clip corresponding to each phase, the first and second fuse clip being secured on opposite ends of the top face within the compartment;

third terminal means for connecting to the load side of the circuit, the third terminals means electrically and mechanically connecting to the first fuse clip;

an elongated connector having two ends, one end of the connector electrically and mechanically connecting to the second fuse clip, the opposite end of the connector electrically and mechanically connecting to the second terminal means; and

means for securing the base to the mounting surface of the base assembly, the securing means being coupled to the base.

14. The switch defined in claim 13 wherein the position of the terminal means and the position of the opposite end of the elongated connector being adapted to connect to the switch contact are juxtaposed when the means secures the base to the mounting surface of the base assembly.

15. The switch defined in claim 13 wherein the securing means includes a flange integrally formed with and extending outwardly from one of the upstanding walls of the compartment, the switch further includes an arc suppressor having a mating flange corresponding to the flange and being adapted to abut one another, the arc suppressor having a fastener which connects to the mounting surface of the base assembly.

16. The switch defined in claim 13 wherein the base further includes a connector aperture therethrough, the connector aperture being positioned near the first fuse clip and having sufficient size to allow the elongated connector passage therethrough.

17. The switch defined in claim 13 wherein one of the upstanding walls further includes an aperture being positioned near the second fuse clip, the aperture allowing the terminal means to extend through the upstanding wall for electrical connection external to the compartment.