Patents by Inventor Tommi Rantalen

Tommi Rantalen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • OVERVOLTAGE PROTECTION ELEMENT MONITORING
    Publication number: 20150369856
    Abstract: The invention relates to a method and an arrangement for determining an end-of-life of an overvoltage protection element (2) by determining (101) a predefined voltage limit based on a nominal voltage, determining (102) a measuring voltage across switch components (5) of the switch arrangement in connection with a switch-off event, and determining (103) that the overvoltage protection element (2) has reached its end-of-life when the measuring voltage is equal to or lower than the predefined voltage limit.
    Type: Application
    Filed: December 28, 2012
    Publication date: December 24, 2015
    Inventors: Marko Takala, Tero Kentala, Harri Mattlar, Matti Kähkipuro, Tommi Rantalen