Electricity: electrical systems and devices – Safety and protection of systems and devices – Circuit interruption by thermal sensing
Patent
1995-01-10
1996-12-17
Gaffin, Jeffrey A.
Electricity: electrical systems and devices
Safety and protection of systems and devices
Circuit interruption by thermal sensing
361 25, H02H 504
Patent
active
055859950
ABSTRACT:
This invention concerns an electronic thermal protection device adapted to interrupt the power supply on a multiphase line comprising a temperature detector including a resistive element thermally coupled to a temperature sensor that is connected to a digital processing circuit adapted to outputt a control order as a function of the overload detected by the temperature sensor. The temperature detector resistive element is connected to various rectifiers, each powered by a current transformer installed on one line wire such that the sum of the currents delivered by the rectifiers flows in the resistive element.
REFERENCES:
patent: 4054934 (1977-10-01), Riebs
patent: 5283708 (1994-02-01), Waltz
Baurand Gilles
Stentz Antoine
Gaffin Jeffrey A.
Medley Sally C.
Schneider Electric SA
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