Luminous tube protection circuit

Details Luminous tube protection circuit Luminous tube protection circuit

1995-06-07

1997-04-15

Gaffin, Jeffrey A.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Transformer protection

361 86, H02H 704

Patent

active

056215983

ABSTRACT:
A protection circuit for monitoring the power from a luminous tube transformer to a luminous tube including sensor connected to a secondary of the transformer, a window comparator circuit connected to the sensor and providing a fault signal when the sensor output exceeds the window limits, and a driver switching off power to the transformer primary when the driver receives a fault signal. A temperature compensation circuit monitors the ambient air temperature for providing a time delay before disconnecting the power supply until the luminous tube stabilizes, and also turns off the power supply when the ambient temperature exceeds upper and lower limits.

REFERENCES:
patent: 3781636 (1973-12-01), Genuit et al.
patent: 3793559 (1974-02-01), Ristuccia
patent: 4210947 (1980-07-01), Koizumi
patent: 4612617 (1986-09-01), Laplace, Jr. et al.
patent: 4727448 (1988-02-01), Hanyuda et al.
patent: 4965692 (1990-10-01), Burns et al.
patent: 4989155 (1991-01-01), Begin et al.
patent: 5136458 (1992-08-01), Durivage, III

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