Transformer wiring method and apparatus for fluorescent lighting
First Claim
Patent Images
1. A fluorescent lighting apparatus, comprising:
- a step-down transformer supported on the fluorescent lighting apparatus, the transformer having a primary winding with a first end connectible to a first line input and a second end connectible to a second line input, and a secondary winding having a first end and a second end;
a ballast having a common ballast line input connected to the first end of the secondary winding, and a hot ballast line input connected to the second end of the secondary winding; and
a jumper connected to the second end of the primary winding and the second end of the secondary winding so that second line input and the second end of the primary winding and the second end of the secondary winding and the hot ballast input line have electrical continuity.
9 Assignments
0 Petitions
Accused Products
Abstract
A transformer wiring method and apparatus for fluorescent lighting are described. The fluorescent lighting apparatus includes a transformer and a ballast. An installer is easily able to balance the system load because each fluorescent lighting apparatus includes its own transformer and may be connected directly to a facility'"'"'s three phase power distribution while still operating at rated voltages. Moreover, the ballast is protected from surges and stray voltages thereby reducing the frequency of ballast failures.
-
Citations
25 Claims
-
1. A fluorescent lighting apparatus, comprising:
-
a step-down transformer supported on the fluorescent lighting apparatus, the transformer having a primary winding with a first end connectible to a first line input and a second end connectible to a second line input, and a secondary winding having a first end and a second end; a ballast having a common ballast line input connected to the first end of the secondary winding, and a hot ballast line input connected to the second end of the secondary winding; and a jumper connected to the second end of the primary winding and the second end of the secondary winding so that second line input and the second end of the primary winding and the second end of the secondary winding and the hot ballast input line have electrical continuity. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
-
-
15. A fluorescent lighting apparatus, comprising:
-
a 480V to 277V step-down autotransformer supported on the fluorescent lighting apparatus, the autotransformer having a primary winding with a first end connectable to a first line input and a second end connectable to a second line input, and a tap; a ballast having a common ballast line input connected to the tap, and a hot ballast line input connected to the second end of the secondary winding; a jumper electrically connected to the second end of the primary winding and the hot ballast line input, so that the second line input and the second end of the autotransformer and the hot ballast line input have electrical continuity. - View Dependent Claims (16, 17, 18, 19)
-
-
20. A method of wiring a fluorescent lighting apparatus having a step-down transformer and a ballast, comprising the steps of:
-
connecting a primary winding of the step-down transformer to a first line input and a second line input; connecting a secondary winding of the step-down transformer to a common ballast line input and a hot ballast line input of the ballast; connecting a jumper between one end of the primary winding and one end of the secondary winding so that the second line input and the one end of the primary winding and the one end of the secondary winding and the hot ballast input line have electrical continuity; and connecting a ballast ground of the ballast to a ground. - View Dependent Claims (21, 22)
-
-
23. A method of wiring a fluorescent lighting apparatus having a step-down autotransformer and a ballast, comprising the steps of:
-
connecting a winding of the step-down autotransformer to a first line input and a second line input; connecting a tap of the step-down autotransformer to a common ballast line input of the ballast; connecting a jumper between one end of the winding and a hot ballast line input of the ballast so that the second line input and the one end of the winding and the hot ballast line input have electrical continuity; and connecting a ballast ground of the ballast to a ground. - View Dependent Claims (24, 25)
-
Specification