Secondary ground fault protected luminous tube transformer for m

Details Secondary ground fault protected luminous tube transformer for m Secondary ground fault protected luminous tube transformer for m

1996-09-19

1998-05-12

Gaffin, Jeffrey A.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Ground fault protection

361 35, 315122, H02H 300

Patent

active

057515239

ABSTRACT:
A low cost power supply for neon lamps provides enhanced safety protection. The power supply has a transformer with a return path which is separate from the earth ground so that a fault current can be detected. The power supply has a mid-point connected secondary coil design which operates a mid-point connected neon lamp configuration. A protection circuit detects the fault current flowing between the output terminals and the earth ground. When the fault current is detected, the protection circuit disconnects the input power from the primary winding. An input power reset is required to restart the power supply once the protection circuit has operated.

REFERENCES:
patent: 1786422 (1930-12-01), Daley
patent: 3666993 (1972-05-01), Legatti
patent: 4507698 (1985-03-01), Nilssen
patent: 5241443 (1993-08-01), Efantis
patent: 5387845 (1995-02-01), Nilssen

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