CA1089545A - Bus bar outlet cover with protective means - Google Patents
Bus bar outlet cover with protective meansInfo
- Publication number
- CA1089545A CA1089545A CA291,348A CA291348A CA1089545A CA 1089545 A CA1089545 A CA 1089545A CA 291348 A CA291348 A CA 291348A CA 1089545 A CA1089545 A CA 1089545A
- Authority
- CA
- Canada
- Prior art keywords
- plug
- housing
- cover
- bus duct
- opening
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G5/00—Installations of bus-bars
- H02G5/06—Totally-enclosed installations, e.g. in metal casings
- H02G5/08—Connection boxes therefor
Landscapes
- Installation Of Bus-Bars (AREA)
- Connections Arranged To Contact A Plurality Of Conductors (AREA)
- Connector Housings Or Holding Contact Members (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
An outlet cover for a bus duct characterized by a bus duct having an outlet opening in the housing wall and a cover hingedly mounted on the housing and movable between open and closed positions of the opening. In the open position the cover is disposed in an upright position with respect to the plane of the opening and the wall, whereby a plug-in unit mounted on the bus duct upon the opening is adjacent to the cover in the open position to thereby prevent accidental contact with conductors within the opening.
An outlet cover for a bus duct characterized by a bus duct having an outlet opening in the housing wall and a cover hingedly mounted on the housing and movable between open and closed positions of the opening. In the open position the cover is disposed in an upright position with respect to the plane of the opening and the wall, whereby a plug-in unit mounted on the bus duct upon the opening is adjacent to the cover in the open position to thereby prevent accidental contact with conductors within the opening.
Description
lS~ '15 Th:is invention relates generally to bus duct systems o~ ~lectric power distribution and, more particu-larly, to an improved bus duct plug-in assembly.
The invention deals especially with the kind of bus duct plug-in assembly comprising an opening formed in a wall portion of the bus duct, and a plug-in unit adapted to be mounted on the bus duct such that connectors forming part of the plug-in unit extend through said open-ing to make electrical contact with the bus bars in the duct. With the plug-in unit thus mounted in place, a cir-cuit control device, such as a circuit breaker, may be inserted therein and thereby connected to sbab-like termi-nal portions of the plug-in unit connectors, as well known in the art and as disclosed, for example, in Applicant's U.S. patent specification N 3,213,405.
Since plug-in units are removable from the asso-ciated bus duct, it is customary to provide the latter with covers for closing the openings in the plug-in regions when the plug-in units are not in place. Heretofore, such covers have been either of the sliding kind supported on the bus duct housing so as to slide thereon between cover-open and cover-closed positions, or, as shown in Applicant's U.S. patent specification N 3,710,302, of the hinged type made to pivot through 180 between cover-closed and cover-open positions. Of course, the purpose of closing the ~l -openings in the plug-in regions when the plug-in units are removed therefrom is to prevent accidental contact with the live parts within the bus duct housing. ~ 1 It is the principal object of the invention to ~ -provide an improved bus duct plug-in assembly which will = . . . .. . .
lO~t'35~5 protect persons al~o rrom making accidental contact with live parts in the act of inserting or removing a plug-in unit at a bus duct plug-in region.
The invention accordingly resides in a bus duct plug-in assembly comprising a bus duct including a housing which contains conductive bus bars and has formed therein an opening giving access to said bus bars, a plug-in unit including connectors protruding therefrom, said plug-in unit being removably mountable upon said housing such that the connectors extend through said opening to make electri-cal contact with the respective bus bars, and a cover pivotally supported on said housing and movable to open and closed positions with respect to the opening therein, said cover having associated therewith means for limiting pivotal movement of the cover to an extent causing the cover in the open position thereof to extend substantially perpendicular with respect to a plane parallel to said - ;~
openings, and the pivot axis of the cover being located sufficiently near said opening to enable the cover, when ~ ~
; 20 in the open position thereof, to prevent human fingers -^
from being inserted between the cover and said plug-in unit ; as the latter is being mounted on or removed from said bus duct.
With this arrangement according to the invention, the cover, when in its open position? is not completely out of the way, as are the conventional sliding and hinged covers which in their open positions lie flat against - ~-the surface of the bus duct housing, but instead is utilized~
to positively prevent persons inserting or removing the 3 plug-in unit from touching any live parts.
' For added protection, the plug-in unit prefer-ably is provided with a pair of ~langes extending there-from in the same direction as said connectors, and which flanges are spaced apart slightly more than corresponds to the width of said housing, whereby movement o~ the plug-in unit toward its mounted position on the bus duct will cause said flanges to slide over side wall portions o~
said housing before the connectors make electrical contact with the bus bars therein, and thereby render the connec-tors completely inaccessible to the person installing theplug-in unit on the duct.
A preferred embodiment of the invention will now be described, by way of example only, with reference to the accompanying drawing, in which:
Figure 1 is a side view, partly in section, of a bus duct plug-in assembly embodying the invention, and Fig. 2 is a vertical sectional view taken along the line II-II of Fig. 1.
In the illustrated embodiment, the invention is shown applied to a bus duct plug-in assembly of the general type disclosed in the above-mentioned U.S. patent speci-fication N 3,213,405. As seen from the drawings, the assembly comprises a bus duct section generally designated with reference numeral 3, and a plug-in unit generally designated with numeral 4. The bus duct section 3 comprises a housing formed of two parts 5 and 7 made of sheet metal and secured, e.g. bolted, together along lateral flange portions 9 thereof. Disposed within the bus duct housing are three main bus bars 13 and a neutral bus bar 14, which bus bars are supported by insulating support members of the plug-in type, one of which is shown at 17.
The plug-in type bus ~)ar support member 17 is a one-piece molded insulating body having a front wall 19, two side walls 21, and two end walls 23. The end walls 23 have extensions 33 which form legs for supporting the bus bar support member 17 upon the rear wall of the duct formed by the housing part 7. The bus bars 13, 14 extending through the generally trough-shaped support mem-ber 17 are isolated therein from each other by insulating barriers 29 formed integral with the member 17, and they are lodged in recesses 31 formed in the end walls 23.
Formed in the front wall 19 of the member 17 are three openings 25 aligned with the respective main bus bars 13, and a further opening 27 aligned with the neutral bus bar 14. All four of the openings 25 and 27 are accessible from the front of the bus duct 3 through an opening 79 formed in the housing part 5 thereof.
The plug-in unit 4, shown in the drawings as mounted on the bus duct housing 5, 7 over the plug-in type support member 17, comprises a housing 35 having a cover 37 secured thereto by suitable means such as screws 39 shown threadedly engaged with tapped openings in in-turned flanges 41 of the housing 35.
Secured in position within the housing 35 is an insulating block 45 which supports three main connectors 47 and a neutral connector 55. The main connectors 47 are elongated conductors each having a stab-like inner terminal ~"
portion 53, and an outer connecting portion with a clip -49 secured thereto, e.g. by means of rivets 51. The neutral connector 55 comprises a similar conductor which likewise . . .
1089S':~S
has an outer connecting portion with a clip 49 secured thereto, but has its inner end connected to a terminal W~th the plug-in unit 4 mounted on the bus duct ;
3 as shown, the electrical connectors 47 and 55 extend through the openings 25, 27 in the plug-in type support `~
member 17, and their clips 49 are engaged with the respec-tive bus bars 13 and 14. The plug-in unit 4 is fastened to the bus duct housing 5, 7 by suitable means, such as screws 59 passing through openings in two generally L-shaped brackets 61 on the housing 35, and threadedly engaged with tapped openings in two generally L-shaped brackets 63 which are anchored to the housing 5, 7 by means of stamped-out bracket portions 65 cooperating with the flanges 9 o~ the housing. -A three-pole circuit breaker indicated in phantom at 67 is shown supported, at one end thereof, on the in- -sulating block 45 and, at its other end, on a bracket 69 suitable secured to the base of the plug-in unit housing 35. Thus mounted in position, the circuit breaker 67 has terminal clips thereo~, generally indicated at 71 in Fig.
The invention deals especially with the kind of bus duct plug-in assembly comprising an opening formed in a wall portion of the bus duct, and a plug-in unit adapted to be mounted on the bus duct such that connectors forming part of the plug-in unit extend through said open-ing to make electrical contact with the bus bars in the duct. With the plug-in unit thus mounted in place, a cir-cuit control device, such as a circuit breaker, may be inserted therein and thereby connected to sbab-like termi-nal portions of the plug-in unit connectors, as well known in the art and as disclosed, for example, in Applicant's U.S. patent specification N 3,213,405.
Since plug-in units are removable from the asso-ciated bus duct, it is customary to provide the latter with covers for closing the openings in the plug-in regions when the plug-in units are not in place. Heretofore, such covers have been either of the sliding kind supported on the bus duct housing so as to slide thereon between cover-open and cover-closed positions, or, as shown in Applicant's U.S. patent specification N 3,710,302, of the hinged type made to pivot through 180 between cover-closed and cover-open positions. Of course, the purpose of closing the ~l -openings in the plug-in regions when the plug-in units are removed therefrom is to prevent accidental contact with the live parts within the bus duct housing. ~ 1 It is the principal object of the invention to ~ -provide an improved bus duct plug-in assembly which will = . . . .. . .
lO~t'35~5 protect persons al~o rrom making accidental contact with live parts in the act of inserting or removing a plug-in unit at a bus duct plug-in region.
The invention accordingly resides in a bus duct plug-in assembly comprising a bus duct including a housing which contains conductive bus bars and has formed therein an opening giving access to said bus bars, a plug-in unit including connectors protruding therefrom, said plug-in unit being removably mountable upon said housing such that the connectors extend through said opening to make electri-cal contact with the respective bus bars, and a cover pivotally supported on said housing and movable to open and closed positions with respect to the opening therein, said cover having associated therewith means for limiting pivotal movement of the cover to an extent causing the cover in the open position thereof to extend substantially perpendicular with respect to a plane parallel to said - ;~
openings, and the pivot axis of the cover being located sufficiently near said opening to enable the cover, when ~ ~
; 20 in the open position thereof, to prevent human fingers -^
from being inserted between the cover and said plug-in unit ; as the latter is being mounted on or removed from said bus duct.
With this arrangement according to the invention, the cover, when in its open position? is not completely out of the way, as are the conventional sliding and hinged covers which in their open positions lie flat against - ~-the surface of the bus duct housing, but instead is utilized~
to positively prevent persons inserting or removing the 3 plug-in unit from touching any live parts.
' For added protection, the plug-in unit prefer-ably is provided with a pair of ~langes extending there-from in the same direction as said connectors, and which flanges are spaced apart slightly more than corresponds to the width of said housing, whereby movement o~ the plug-in unit toward its mounted position on the bus duct will cause said flanges to slide over side wall portions o~
said housing before the connectors make electrical contact with the bus bars therein, and thereby render the connec-tors completely inaccessible to the person installing theplug-in unit on the duct.
A preferred embodiment of the invention will now be described, by way of example only, with reference to the accompanying drawing, in which:
Figure 1 is a side view, partly in section, of a bus duct plug-in assembly embodying the invention, and Fig. 2 is a vertical sectional view taken along the line II-II of Fig. 1.
In the illustrated embodiment, the invention is shown applied to a bus duct plug-in assembly of the general type disclosed in the above-mentioned U.S. patent speci-fication N 3,213,405. As seen from the drawings, the assembly comprises a bus duct section generally designated with reference numeral 3, and a plug-in unit generally designated with numeral 4. The bus duct section 3 comprises a housing formed of two parts 5 and 7 made of sheet metal and secured, e.g. bolted, together along lateral flange portions 9 thereof. Disposed within the bus duct housing are three main bus bars 13 and a neutral bus bar 14, which bus bars are supported by insulating support members of the plug-in type, one of which is shown at 17.
The plug-in type bus ~)ar support member 17 is a one-piece molded insulating body having a front wall 19, two side walls 21, and two end walls 23. The end walls 23 have extensions 33 which form legs for supporting the bus bar support member 17 upon the rear wall of the duct formed by the housing part 7. The bus bars 13, 14 extending through the generally trough-shaped support mem-ber 17 are isolated therein from each other by insulating barriers 29 formed integral with the member 17, and they are lodged in recesses 31 formed in the end walls 23.
Formed in the front wall 19 of the member 17 are three openings 25 aligned with the respective main bus bars 13, and a further opening 27 aligned with the neutral bus bar 14. All four of the openings 25 and 27 are accessible from the front of the bus duct 3 through an opening 79 formed in the housing part 5 thereof.
The plug-in unit 4, shown in the drawings as mounted on the bus duct housing 5, 7 over the plug-in type support member 17, comprises a housing 35 having a cover 37 secured thereto by suitable means such as screws 39 shown threadedly engaged with tapped openings in in-turned flanges 41 of the housing 35.
Secured in position within the housing 35 is an insulating block 45 which supports three main connectors 47 and a neutral connector 55. The main connectors 47 are elongated conductors each having a stab-like inner terminal ~"
portion 53, and an outer connecting portion with a clip -49 secured thereto, e.g. by means of rivets 51. The neutral connector 55 comprises a similar conductor which likewise . . .
1089S':~S
has an outer connecting portion with a clip 49 secured thereto, but has its inner end connected to a terminal W~th the plug-in unit 4 mounted on the bus duct ;
3 as shown, the electrical connectors 47 and 55 extend through the openings 25, 27 in the plug-in type support `~
member 17, and their clips 49 are engaged with the respec-tive bus bars 13 and 14. The plug-in unit 4 is fastened to the bus duct housing 5, 7 by suitable means, such as screws 59 passing through openings in two generally L-shaped brackets 61 on the housing 35, and threadedly engaged with tapped openings in two generally L-shaped brackets 63 which are anchored to the housing 5, 7 by means of stamped-out bracket portions 65 cooperating with the flanges 9 o~ the housing. -A three-pole circuit breaker indicated in phantom at 67 is shown supported, at one end thereof, on the in- -sulating block 45 and, at its other end, on a bracket 69 suitable secured to the base of the plug-in unit housing 35. Thus mounted in position, the circuit breaker 67 has terminal clips thereo~, generally indicated at 71 in Fig.
2, frictionally engaged with the stab-like terminal por- ~-tions 53 of the respective main connectors 47 so that power supplied through the bus bars can be delivered through the circuit breaker to a load (not shown) connected there-to when the circuit breaker contacts (not shown) are closed by means of a handle 73, as well known in the art.
The bus duct 3, at each plug-in region thereof, is provided with a cover 75 which is pivotally supported on, e.g. hinged to, the housing part 5 at 77 so as to be movable to .
-,v~,.. " . , ., . ~ . --- -an open position and a closed position (indicated in Fig. 1 by phantom lines 75a) wlth respect to the open- ~ -ing 79 in the duct housing. According to the invention, there are pro~ided means (in the illustrated embodiment, a surface portion 81 of the housing part 5 forming an abutment, and an adJacent edge portion of the cover 75 cooperating with the abutment)for limiting the pivotal movement of the cover 75 about its pivot axis 77 to an extent such that, when in its open position, the cover 75 extends substantially prependicular with respect to a plane parallel to the opening 79, as seen from Fig. 1.
In other words, pivotal movement of the cover 75 between its open and closed positions is limited to about 90.
Furthermore, the hinge or pivot axis 77 of the cover 75 is located sufficiently near the opening 79 to enable the cover, when in its open position, to prevent human fingers from being inserted between the cover 75 and the plug-in unit 4 while the latter is in its mounted position or is being moved thereto or removed therefrom, so that a person plugging-in or unplugging the unit 4 cannot inadvertently touch any of the ccnnectors 47, 55 as they make initial contact, or are still engaged, respectively, with the bus bars within the duct.
For added protection, the plug-in unit 4 prefer-ably is provided with a pair of flanges 85, 87 (Fig. 2) which e~tend therefrom in the same direction as the connec-tors 47, 55 and are spaced apart slightly more than corre-sponds to the width of the bus duct 3. Thus, as the plug-in unit 4 is moved toward its fully mounted position on the bus duct, the flanges ~85 will slide over the side walls ~ ~ ' .
of the bus duct housing before the connectors 47, 55 make initial contact with the bus bars within the duct so that, again, therewill be insufficient clearance for human ringers to slip between the plug-in unit and the bus duct to make accidental contact with live parts. The flanges 85, 87 are secured to the plug-in unit housing 35 (which, as shown, is wider than the bus duct 3) by any suitable means, such as spot welds, for example.
.
.
.
.
. . - .
~ - ,
The bus duct 3, at each plug-in region thereof, is provided with a cover 75 which is pivotally supported on, e.g. hinged to, the housing part 5 at 77 so as to be movable to .
-,v~,.. " . , ., . ~ . --- -an open position and a closed position (indicated in Fig. 1 by phantom lines 75a) wlth respect to the open- ~ -ing 79 in the duct housing. According to the invention, there are pro~ided means (in the illustrated embodiment, a surface portion 81 of the housing part 5 forming an abutment, and an adJacent edge portion of the cover 75 cooperating with the abutment)for limiting the pivotal movement of the cover 75 about its pivot axis 77 to an extent such that, when in its open position, the cover 75 extends substantially prependicular with respect to a plane parallel to the opening 79, as seen from Fig. 1.
In other words, pivotal movement of the cover 75 between its open and closed positions is limited to about 90.
Furthermore, the hinge or pivot axis 77 of the cover 75 is located sufficiently near the opening 79 to enable the cover, when in its open position, to prevent human fingers from being inserted between the cover 75 and the plug-in unit 4 while the latter is in its mounted position or is being moved thereto or removed therefrom, so that a person plugging-in or unplugging the unit 4 cannot inadvertently touch any of the ccnnectors 47, 55 as they make initial contact, or are still engaged, respectively, with the bus bars within the duct.
For added protection, the plug-in unit 4 prefer-ably is provided with a pair of flanges 85, 87 (Fig. 2) which e~tend therefrom in the same direction as the connec-tors 47, 55 and are spaced apart slightly more than corre-sponds to the width of the bus duct 3. Thus, as the plug-in unit 4 is moved toward its fully mounted position on the bus duct, the flanges ~85 will slide over the side walls ~ ~ ' .
of the bus duct housing before the connectors 47, 55 make initial contact with the bus bars within the duct so that, again, therewill be insufficient clearance for human ringers to slip between the plug-in unit and the bus duct to make accidental contact with live parts. The flanges 85, 87 are secured to the plug-in unit housing 35 (which, as shown, is wider than the bus duct 3) by any suitable means, such as spot welds, for example.
.
.
.
.
. . - .
~ - ,
Claims (5)
1. A bus duct plug-in assembly comprising a bus duct including a housing which contains conductive bus bars and has formed therein an opening giving access to said bus bars, a plug-in unit including connectors pro-truding therefrom, said plug-in unit being removably mount-able upon said housing such that the connectors extend through said opening to make electrical contact with the respective bus bars, and a cover pivotally supported on said housing and movable to open and closed positions with respect to the opening therein, said cover having associated therewith means for limiting pivotal movement of the cover to an extent causing the cover in the open position thereof to extend substantially perpendicular with respect to a plane parallel to said opening, and the pivot axis of the cover being located sufficiently near said opening to enable the cover, when in the open position thereof, to prevent human fingers from being inserted between the cover and said plug-in unit as the latter is being mounted on or removed from said bus duct.
2. A bus duct plug-in assembly according to claim 1, wherein said means comprises a surface portion of said housing forming an abutment, and an edge portion of said cover cooperating with said abutment.
3. A bus duct plug-in assembly according to claim 1, wherein said cover is hinged to said housing so as to be pivotable substantially through 90°.
4. A bus duct plug-in assembly according to claim 1, wherein said plug-in unit includes a pair of flanges which extend therefrom in the same direction as said connectors and are spaced apart slightly more than corresponds to the width of said housing, whereby movement of said plug-in unit toward its mounted posi-tion on the bus duct will cause said flanges to slide over side wall portions of said housing before the connectors make electrical contact with said bus bars therein.
5. A bus duct plug-in assembly according to claim 4, wherein said plug-in unit includes a housing which is wider than the housing of said bus duct, said flanges being secured to said housing.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US74879376A | 1976-12-09 | 1976-12-09 | |
| US748,793 | 1976-12-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1089545A true CA1089545A (en) | 1980-11-11 |
Family
ID=25010952
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA291,348A Expired CA1089545A (en) | 1976-12-09 | 1977-11-21 | Bus bar outlet cover with protective means |
Country Status (10)
| Country | Link |
|---|---|
| JP (1) | JPS5760549Y2 (en) |
| AR (1) | AR211999A1 (en) |
| AU (1) | AU513492B2 (en) |
| BE (1) | BE861655A (en) |
| BR (1) | BR7707904A (en) |
| CA (1) | CA1089545A (en) |
| GB (1) | GB1539307A (en) |
| MX (1) | MX4179E (en) |
| NZ (1) | NZ185706A (en) |
| ZA (1) | ZA776852B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103532067B (en) * | 2013-10-11 | 2016-02-10 | 江苏士林电气设备有限公司 | A kind of illuminating bus slot connector |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5325837Y2 (en) * | 1972-02-21 | 1978-07-01 | ||
| JPS5145512U (en) * | 1975-07-07 | 1976-04-03 |
-
1977
- 1977-11-16 ZA ZA00776852A patent/ZA776852B/en unknown
- 1977-11-17 NZ NZ185706A patent/NZ185706A/en unknown
- 1977-11-21 CA CA291,348A patent/CA1089545A/en not_active Expired
- 1977-11-25 AU AU30961/77A patent/AU513492B2/en not_active Expired
- 1977-11-28 BR BR7707904A patent/BR7707904A/en unknown
- 1977-12-01 AR AR270225A patent/AR211999A1/en active
- 1977-12-05 MX MX776610U patent/MX4179E/en unknown
- 1977-12-08 BE BE183297A patent/BE861655A/en not_active IP Right Cessation
- 1977-12-08 GB GB51127/77A patent/GB1539307A/en not_active Expired
- 1977-12-09 JP JP1977164638U patent/JPS5760549Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| MX4179E (en) | 1982-01-20 |
| JPS5760549Y2 (en) | 1982-12-23 |
| AU3096177A (en) | 1979-05-31 |
| GB1539307A (en) | 1979-01-31 |
| AU513492B2 (en) | 1980-12-04 |
| NZ185706A (en) | 1980-05-27 |
| ZA776852B (en) | 1978-09-27 |
| AR211999A1 (en) | 1978-04-14 |
| JPS53100599U (en) | 1978-08-14 |
| BE861655A (en) | 1978-06-08 |
| BR7707904A (en) | 1978-09-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |