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:
Oct. 06, 2015
Filed:
Jun. 20, 2012
Damir Radan, Sandnes, NO;
Damir Radan, Sandnes, NO;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
A fault detection system for subsea pipeline direct electrical heating cables is provided. The fault detection system includes a first ammeter for measuring a first phase current, a second ammeter for measuring a second phase current, and a third ammeter for measuring a third phase current. The fault detection system also includes a first calculation unit for calculating a negative sequence current from the first phase current, the second phase current, and the third phase current, and a first detection unit for detecting a change in the negative sequence current.
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