WO1992003897A1 - Electrical unit for suspended ceiling - Google Patents
Electrical unit for suspended ceiling Download PDFInfo
- Publication number
- WO1992003897A1 WO1992003897A1 PCT/GB1991/001378 GB9101378W WO9203897A1 WO 1992003897 A1 WO1992003897 A1 WO 1992003897A1 GB 9101378 W GB9101378 W GB 9101378W WO 9203897 A1 WO9203897 A1 WO 9203897A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- ceiling
- frame
- transformer
- unit
- electrical
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V23/00—Arrangement of electric circuit elements in or on lighting devices
- F21V23/02—Arrangement of electric circuit elements in or on lighting devices the elements being transformers, impedances or power supply units, e.g. a transformer with a rectifier
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B39/00—Circuit arrangements or apparatus for operating incandescent light sources
Definitions
- the invention concerns an electrical unit, in particular a transformer, for use in indoor lighting systems, and a suspended ceiling assembly including such a unit.
- the ceiling itself is usually made of a steel frame suspended from the structural ceiling by suitably distributed support wires; panels of, for instance, mineral-fibre-based material are then inserted so as to rest in the frame, providing the ceiling cover.
- the panels are generally rectangular, of standard sizes such as 40 x 40 cm or 40 x 80 cm.
- the lighting is generally provided by specialised matching panels containing light fittings, which may include fluorescent lamps or incandescent lamps.
- light fittings which may include fluorescent lamps or incandescent lamps.
- One kind of light fitting often used is the halogen lamp. These lamps generally require a 12V DC source to be generated from the mains supply.
- the halogen lamps which are light in weight, are fitted in the centre of an otherwise plain panel of fibrous material which supports them.
- a transformer in the system. Since a suitable transformer might weigh about 1 kg it cannot be integrated with the light fitting itself without the use of additional suspension means and is therefore usually mounted on the structural ceiling or a wall, possibly several metres from the light. Typically one transformer will be used for several, perhaps ten, individual lamps. Wires then extend from the transformer to the lamps, suitably rectified to provide the DC supply.
- One problem with this arrangement is that there is a voltage drop from the transformer to each light fitting; further, the drop is different for lights at different distances from the transformer, unless redundant wiring is used.
- an electrical unit in particular a transformer unit, for use in electrical installations in suspended ceilings, characterised in that the unit includes means for engaging the frame of the suspended ceiling so that the unit may be supported by the frame.
- the unit includes a generally cup- shaped housing containing the transformer or other component, and the housing itself forms the engagement means.
- the housing has a groove on the underside constituting the engaging means and corresponding to a longitudinal member of the ceiling frame.
- the cup should be mounted on an intersection of the longitudinal frame members and in this case there should be two intersecting grooves corresponding to the intersection of the ceiling members. In standard ceilings the longitudinal members, and therefore the grooves, will intersect at right angles.
- the transformer may itself be so shaped as to engage the ceiling frame.
- the transformer housing is preferably made of an electrically insulating material, such as PVC or ABS ( a styrene-based plastics material), and the mounting of the transformer in it is advantageously carried out by placing the transformer in the cup and pouring thermosetting resin over it so as to encapsulate the transformer within the cup. The assembly may then be seal with a lid and provided with a socket for detachable light fittings.
- an electrically insulating material such as PVC or ABS ( a styrene-based plastics material
- the invention is directed to a ceiling assembly comprising a suspended frame, a light mounted in the frame and an electrical unit connected to the light, wherein the electrical unit is mounted on the suspended frame.
- FIG. 1 shows a transformer unit and part of the ceiling frame
- Fig. 2 shows schematically the assembly of such a unit into a ceiling.
- a transformer casing 1 is of a generally circular cup shape except for perpendicularly intersecting grooves 3,4 in its base. The grooves have a slightly greater width than the intersecting longitudinal members 6, 7 of the ceiling frame so that the cup 1 can be placed on the intersection and is then firmly in position, secured against horizontal movement.
- At least one light panel 10 adjacent to the intersection shown is inserted into one of the square or rectangular spaces defined by the frame, resting on the flanges 8.
- the transformer is then placed on the intersection and connected by a lead 12 to the light 11.
- the transformer rests on the frame above the level of the panels, and the distance from the transformer to the light (or lights) is small. This facilitates assembly and reduces the voltage drop between transformer and lamp.
- a single transformer can advantageously be used to provide power for two lamps in adjacent or at any rate closely spaced panels.
- the circular cup shown is particularly suitable for toroidal transformers, but clearly cups of different shapes may be chosen as appropriate provided that the grooves in the base match the ceiling framework.
- the rating of the transformers might be 80VA or 110VA, having weights 900g and 1350g respectively, both fitting in a casing of height 6cm and diameter 10cm.
- the 80VA transformer is suitable for supplying two 35W lamps or one 50W lamp, and the 110VA transformer would be sufficient for two 50W lamps.
- the lamps themselves may be 12V dichroic or capsule lamps.
- the invention is not restricted to rectangular ceiling framworks but could be used, if the circumstances so dictated, for hexagonal or even irregular frameworks.
- the grooves shown for engaging with the suspended ceiling represent a particularly simple and effective arrangement, but other engagement means could be envisaged, such as clips or magnetic holders.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE69120820T DE69120820T2 (en) | 1990-08-14 | 1991-08-14 | ELECTRICAL UNIT FOR CEILING LUMINAIRES |
EP91914823A EP0543887B1 (en) | 1990-08-14 | 1991-08-14 | Electrical unit for suspended ceiling |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9017778.3 | 1990-08-14 | ||
GB909017778A GB9017778D0 (en) | 1990-08-14 | 1990-08-14 | Electrical unit for suspended ceiling |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1992003897A1 true WO1992003897A1 (en) | 1992-03-05 |
Family
ID=10680612
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GB1991/001378 WO1992003897A1 (en) | 1990-08-14 | 1991-08-14 | Electrical unit for suspended ceiling |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0543887B1 (en) |
DE (1) | DE69120820T2 (en) |
GB (1) | GB9017778D0 (en) |
WO (1) | WO1992003897A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0939581A2 (en) * | 1998-02-27 | 1999-09-01 | Steinel GmbH & Co. KG | Lamp arrangement and lamp unit for use in the lamp arrangement |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4667133A (en) * | 1983-12-12 | 1987-05-19 | Nilssen Ole K | Power-limited lighting system |
DE8905192U1 (en) * | 1989-04-25 | 1989-06-15 | Jancik, Peter, 4714 Selm | Ceiling light with at least one electrical luminaire provided with a power supply |
DE3801200A1 (en) * | 1988-01-18 | 1989-07-27 | Atelier Fuer Kunst Und Technik | Suspension for low-voltage halogen pendant lamps |
NL8801654A (en) * | 1988-06-30 | 1990-01-16 | Lumiance Bv | Lighting assembly with HF supply tracks - uses switched mode converter to provide 50 KHz supply from normal 50 Hz mains supply |
EP0427346A1 (en) * | 1989-11-08 | 1991-05-15 | van Putten, Simon Cornelis | Ballast for one or more external fluorescent lamps and lighting fixture for fluorescent lamps having no ballast apparatus |
-
1990
- 1990-08-14 GB GB909017778A patent/GB9017778D0/en active Pending
-
1991
- 1991-08-14 WO PCT/GB1991/001378 patent/WO1992003897A1/en active IP Right Grant
- 1991-08-14 EP EP91914823A patent/EP0543887B1/en not_active Expired - Lifetime
- 1991-08-14 DE DE69120820T patent/DE69120820T2/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4667133A (en) * | 1983-12-12 | 1987-05-19 | Nilssen Ole K | Power-limited lighting system |
DE3801200A1 (en) * | 1988-01-18 | 1989-07-27 | Atelier Fuer Kunst Und Technik | Suspension for low-voltage halogen pendant lamps |
NL8801654A (en) * | 1988-06-30 | 1990-01-16 | Lumiance Bv | Lighting assembly with HF supply tracks - uses switched mode converter to provide 50 KHz supply from normal 50 Hz mains supply |
DE8905192U1 (en) * | 1989-04-25 | 1989-06-15 | Jancik, Peter, 4714 Selm | Ceiling light with at least one electrical luminaire provided with a power supply |
EP0427346A1 (en) * | 1989-11-08 | 1991-05-15 | van Putten, Simon Cornelis | Ballast for one or more external fluorescent lamps and lighting fixture for fluorescent lamps having no ballast apparatus |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0939581A2 (en) * | 1998-02-27 | 1999-09-01 | Steinel GmbH & Co. KG | Lamp arrangement and lamp unit for use in the lamp arrangement |
EP0939581A3 (en) * | 1998-02-27 | 2001-04-11 | Steinel GmbH & Co. KG | Lamp arrangement and lamp unit for use in the lamp arrangement |
Also Published As
Publication number | Publication date |
---|---|
EP0543887A1 (en) | 1993-06-02 |
EP0543887B1 (en) | 1996-07-10 |
GB9017778D0 (en) | 1990-09-26 |
DE69120820T2 (en) | 1996-11-07 |
DE69120820D1 (en) | 1996-08-14 |
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