US3855504A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Switchboard with improved horizontal busbar mounting provisions
Assignee: General Electric Co
•
Filing: 1973-09-27
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Granted: 1974-12-17
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Expires: 1993-09-27
Abstract
Abstract A switchboard construction utilizes modular, insulative mounting panels to both electrically isolate and physically mount the various busbars, as well as, via line straps, the various electrical devices to the cabinet frame. The mounting panels installed vertically end-to-end also serve as rear barriers for the compartments accommodating the electrical devices. Barrier sheets secured to the front and back of the panels shield personnel from live parts. Load straps pass through apertures in the panels and vertical buses to the rear of the cabinet for convenient load connection. Horizontal bus sections are joined, electrically connected to and mounted by the vertical buses at common locations.
Inventors
- 👤 W Olashaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:54
CPC Classifications
H; H02; H02B; H02B1/00; H02B1/20; H02B1/21
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
193 words
An electrical switchboard consisting of at least two side-byside switchboard sections for distributing polyphase electrical power to a plurality of loads via respective electrical devices accommodated in compartments stacked vertically in each switchboard section, said switchboard comprising, in combination: A. a frame; B. a plurality of vertical busbars in each switchboard section, one for each phase; C. means insulatively mounting said vertical busbars to said frame; D. connectors electrically connecting said vertical busbars to the electrical devices and the electrical devices to their respective loads; E. a plurality of horizontal busbars, one for each phase, each said horizontal busbar being made up of several horizontal busbar sections; and F. common means at each crossing location in each switchboard section of correspondingly phased horizontal and vertical busbars 1. serially joining two of said horizontal busbar sections endto-end, 2. mounting said horizontal busbars respectively to said vertical busbars, and 3. electrically connecting said horizontal busbars respectively to said vertical busbars; and G. one horizontal busbar section of each said horizontal busbar extending in continuous, uninterrupted fashion between adjacent switchboard sections and having opposite ends terminating at said crossing locations in each of the switchboard sections.
Claim 2
Dependent Claim
193 words
An electrical switchboard consisting of at least two side-byside switchboard sections for distributing polyphase electrical power to a plurality of loads via respective electrical devices accommodated in compartments stacked vertically in each switchboard section, said switchboard comprising, in combination: A. a frame; B. a plurality of vertical busbars in each switchboard section, one for each phase; C. means insulatively mounting said vertical busbars to said frame; D. connectors electrically connecting said vertical busbars to the electrical devices and the electrical devices to their respective loads; E. a plurality of horizontal busbars, one for each phase, each said horizontal busbar being made up of several horizontal busbar sections; and F. common means at each crossing location in each switchboard section of correspondingly phased horizontal and vertical busbars 1. serially joining two of said horizontal busbar sections endto-end, 2. mounting said horizontal busbars respectively to said vertical busbars, and 3. electrically connecting said horizontal busbars respectively to said vertical busbars; and G. one horizontal busbar section of each said horizontal busbar extending in continuous, uninterrupted fashion between adjacent switchboard sections and having opposite ends terminating at said crossing locations in each of the switchboard sections.
Claim 3
Dependent Claim
10 words
mounting said horizontal busbars respectively to said vertical busbars, and
Claim 4
Dependent Claim
10 words
mounting said horizontal busbars respectively to said vertical busbars, and
Claim 5
Dependent Claim
20 words
The electrical switchboard defined in claim 1, wherein each said joining, mounting and electrically connecting means comprises a bolted joint.
Claim 6
Dependent Claim
45 words
electrically connecting said horizontal busbars respectively to said vertical busbars; and G. one horizontal busbar section of each said horizontal busbar extending in continuous, uninterrupted fashion between adjacent switchboard sections and having opposite ends terminating at said crossing locations in each of the switchboard sections.
Claim 7
Dependent Claim
45 words
electrically connecting said horizontal busbars respectively to said vertical busbars; and G. one horizontal busbar section of each said horizontal busbar extending in continuous, uninterrupted fashion between adjacent switchboard sections and having opposite ends terminating at said crossing locations in each of the switchboard sections.
Claim 8
Dependent Claim
19 words
The electrical switchboard defined in claim 1, wherein corresponding surfaces of joined busbar sections are aligned in common planes.
Claim 9
Dependent Claim
25 words
The electrical switchboard defined in claim 1, wherein the joined ends of said horizontal busbar sections are relieved to provide for a scarf joint therebetween.
Claim 10
Dependent Claim
36 words
The electrical switchboard defined in claim 1, which further includes a conductive bracket secured to each vertical busbar at said crossing locations, each said bracket including means for accepting said joining, mounting and electrically connecting means.
Claim 11
Dependent Claim
33 words
The electrical switchboard defined in claim 5, wherein each said bracket is U-shaped having leg portions and an interconnecting bridge portion, the ends of said leg portions being welded to said vertical busbars.
Claim 12
Dependent Claim
50 words
The electrical switchboard defined in claim 6, wherein said vertical busbars are also U-shaped having leg portions and an intercoNnecting bridge portion, said bracket leg portions being relieved at their ends to conform to the inner corners of said vertical busbar leg portions where the welded connection therebetween is located.
Claim 13
Dependent Claim
41 words
The electrical switchboard defined in claim 6, wherein said bridging portion is formed having tapped bores, and said joining, mounting and electrically connecting means comprise bolts threaded into said bores to clamp said horizontal busbars to respective ones of said bracket.
Claim 14
Dependent Claim
19 words
The electrical switchboard defined in claim 8, wherein corresponding surfaces of joined busbar sections are aligned in common planes.
Claim 15
Dependent Claim
24 words
The electrical switchboard defined in claim 8, where the ends of said horizontal busbar sections are relieved to provide for a scarf joint therebetween.
References Cited (Backward Citations)
US3210716A
Cited
US3308348A
Cited
US3493818A
Cited
US3531758A
Cited
US3588620A
Cited
US3710198A
Cited
US3732523A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-16 | 1978-06-17 | 1978-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-16 | 1982-06-17 | 1982-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-16 | 1986-06-17 | 1986-12-17 | $7700.00 | Window Closed / Lapsed |