| 摘要 |
A constant wattage ballast transformer of the isolated type permitting the electrical grounding of a mounting shell of the lamp it powers in which a primary, secondary and auxiliary winding are provided with the primary winding inducing voltage into the auxiliary and secondary windings while being electrically isolated from both these windings and the auxiliary winding electrically connected to the secondary winding to add its induced voltage to that directly induced in the secondary winding from the primary winding.
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