Schneider Electric Industries Sas

Jiri Stepanek

Eric Domejean

Simon Tian

Daniel Sinthomez

Pierre Blanchard

Henricus David Stokman

Yvan Cadoux

Bruno Bordet

Benoit Leprettre

François Vincent

A system for managing an insulation fault in an electrical installation includes a monitoring device, measuring devices configured to measure an electrical quantity in the installation, and switches controlled by the monitoring device. The monitoring device is configured to: detect a first insulation fault in the installation; detect a second insulation fault in the installation; and automatically control one of the switches associated with output terminals so as to open in order to eliminate one of the detected electrical faults, the switch to be opened being chosen depending on the location of the detected insulation faults and on predefined control laws making it possible to disconnect only some of the electrical loads.

Methods and systems for managing an insulation fault in an electrical installation

A method for detecting an isolation fault in an electrical installation comprises:

Methods, devices and systems for detecting an isolation fault in an electrical installation

A device for testing the operation of a protection unit of an electrical network. The test device includes a generator for generating a pulse train in a secondary winding of a current transformer according to a profile of frequencies such that a measurement of the pulse train after passage through a low-pass filter is lower than a selected trip threshold, and a processing circuit arranged to identify a presence of the pulse train in a signal delivered by a second secondary winding of the current transformer. A protection unit including such a test device and to a method for testing an electrical protection unit.

Device and method for testing the operation of a protection unit and protection unit comprising such a test device

A protection system configured to protect plural DC voltage sources configured to be connected in parallel between first and second input terminals of a voltage inverter. The voltage inverter can convert a DC input voltage into an AC output voltage. Each DC voltage source is connected by a first electrical conductor to the first input terminal and by a second electrical conductor to the second input terminal. The protection system includes: for each DC voltage source, a first cut-off member and first detector of a defect of isolation of the first conductor with respect to an electrical ground, the first detector and associated first cut-off member connected in series between the corresponding DC voltage source and the first input terminal of the inverter; and a mechanism triggering, in event of detection of the isolation defect, the associated first cut-off member to open the electrical link corresponding to the first conductor.

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Echirolles, France

Jiri Stepanek