Leakage current based remote monitoring device and method for disconnector devices

US11777303B2 · kind B2 · utility

Assignee

• Hitachi Energy Switzerland AG · CH

Inventors

• Gian-Luigi Madonna · Otelfingen, CH
• Xavier Kornmann · Lauchringen, DE
• Daniel Neeser · Thalwil, CH
• Stefano Bertoli · Wettingen, CH
• Ektor Sotiropoulos · Zürich, CH
• Martin Schick-Pauli · Zürich, CH
• Alexander Fach · Boppelsen, CH
• Philipp Sommer · Heidelberg, DE
• Yannick Maret · Dättwil, CH

Key dates

• Filing date: Mar 11, 2019
• Grant date: Oct 3, 2023
• Expiry date: May 25, 2039

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y04S40/12
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

Disclosed is a leakage current measuring device for a grid protection system protecting a power distribution or transmission grid from damage in case of a power surge, the grid protection system including a disconnector device and a surge arrester connected in series along a grounding path, the grounding path connecting a phase of a power distribution or transmission grid through the surge arrester and the disconnector device to ground, the disconnector device being configured for being activated in case of an overload condition, thereby disconnecting the surge arrester. The leakage current measuring device includes a leakage current sensor for measuring a leakage current IL flowing along the grounding path, the leakage current IL being indicative of the electrical connection status of the disconnector device. The electrical connection status is one of an activated and an inactivated status of the disconnector device.