The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 28, 2006
Filed:
Jan. 23, 2002
Michael Gudmundsson, Ludvika, SE;
Sara Nordin, Ludvika, SE;
Michael Gudmundsson, Ludvika, SE;
Sara Nordin, Ludvika, SE;
ABB AB, Vasteras, SE;
Abstract
The invention relates to a device for monitoring a surge arrester connected to a power network, comprising a registering unit () and means () for attachment of the registering unit to the surge arrester. The registering unit comprises a grounding line (), which is adapted to conduct a current flowing through the surge arrester to ground, means () for registration of a current passing through the gounding line () from the surge arrester, a member () for registration of current pulses passing through the surge arrester, and a storage member () for storing data concerning the current passing through the grounding line () from the surge arrester and data concerning registered current pulses. The registering unit () further comprises a field probe () connected to ground, a sensor () for registration of the current flowing between the field probe () and ground, and a time meter (), the storage member () being adapted to store the data concerning the current passing through the grounding line () from the surge arrester and the data concerning the current flowing between the field probe) and ground associated to a time information determined by means of the time meter (). The invention also relates to a system comprising one or several such registering units.