Electricity: measuring and testing – Fault detecting in electric circuits and of electric components – For fault location
Reexamination Certificate
2006-12-27
2009-02-03
Gutierrez, Diego (Department: 2831)
Electricity: measuring and testing
Fault detecting in electric circuits and of electric components
For fault location
C324S522000, C324S10300R, C363S095000
Reexamination Certificate
active
07486082
ABSTRACT:
An inverter system which converts DC input into AC output and supplies the AC output to a load such as an FL tube detects change in a circuit current due to anomaly such as discharge without contacting with a current route. Relating to an inverter which converts DC input into AC output and supplies the AC output to a load, change in a circuit current of the inverter is detected through the medium of magnetic flux change due to the change in the circuit current caused by discharge. For example, if change in a current occurs in the circuit current of the inverter by disconnection discharge or ground-fault discharge occurring in a current route including a load of the inverter, magnetic flux change occurs in circuit wiring and a space of a core gap of a transformer of the inverter. The change in the circuit current is detected through the medium of the magnetic flux change without contacting with the circuit wiring or the transformer.
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Hachisuka Seiji
Senba Minoru
Tanaka Masaru
Yadoori Shuuichi
Fujitsu Limited
Gutierrez Diego
Natalini Jeff
Staas & Halsey , LLP
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