Ballast EMI and shock hazard reduction

Details Ballast EMI and shock hazard reduction Ballast EMI and shock hazard reduction

1976-08-26

1978-07-18

Chatmon, Jr., Saxfield

Electric lamp and discharge devices: systems

Automatic substitution of the power supply

315278, 328 7, 361 35, 361 38, H05B 3700, H05B 4114

Patent

active

041018060

ABSTRACT:
A ballast for operating a pair of fluorescent lamps includes an isolation transformer with a split secondary winding. A power capacitor is connected serially between the two sections of the secondary for reducing shock hazard associated with leakage current resulting when a high frequency emergency lighting circuit is operational and further, for minimizing transference of EMI from the lamp side of the ballast to the line side.

REFERENCES:
patent: 2682014 (1954-06-01), Feinberg
patent: 3160784 (1964-12-01), Strecker
patent: 3176187 (1965-03-01), Sola
patent: 3333150 (1967-07-01), Eppert
patent: 3386003 (1968-05-01), Partridge
patent: 3631322 (1971-12-01), Kruger
patent: 3906243 (1975-09-01), Herzog

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