Back to results
US 10,176,945 B2Granted
DC electrical circuit breaker
AssigneeSchneider Electric Industries SAS
InventorsEric Domejean, Loic Rondot, Stephane Dye
Life of this patent
Estimating the term…
Abstract
A DC electrical circuit breaker includes first and second movable electrical contacts. The circuit breaker includes a magnetic circuit including a magnet and generating a magnetic field able to guide an electrical arc in the direction of a quenching chamber, and having for this purpose curved field lines extending perpendicularly to opposite lateral walls of an electrical arc formation chamber, these field lines converging, in a central region of the arc formation chamber containing the contact zones, toward the quenching chamber while extending parallel to the longitudinal plane.
Claims15
A DC electrical circuit breaker, comprising:
- first and second terminals for a DC electric current,
- first and second electrical contacts, connected respectively to the first and second terminals and being selectively displaceable with respect to one another, along a longitudinal plane of the circuit breaker, between:
- a closed position, in which respective contact zones of the first and second electrical contacts are in contact with one another and being configured to permit flow of the DC electric current between the first and second electrical contacts, and
- an open position, in which the respective contact zones are remote from one another;
- an electric arc formation chamber, in which the contact zones are disposed;
- an electric arc quenching chamber;
- and
- a magnetic circuit comprising a magnet, and a magnetic core extending at least partly along the first electrical contact, the magnetic circuit generating a magnetic field configured to guide, in a direction of the electric arc quenching chamber, an electric arc formed between the contact zones in the open position, the magnetic field having curved field lines extending essentially perpendicularly to opposite lateral walls of the electric arc formation chamber, the lateral walls being disposed on either side of the contact zones and being essentially parallel to the longitudinal plane, the curved field lines converging, at a level of a central region of the electric arc formation chamber containing the contact zones, towards the electric arc quenching chamber while extending parallel to the longitudinal plane.
5 more elements
A DC electrical circuit breaker, comprising:
- first and second terminals for a DC electric current,
- a pair of first electrical contacts respectively connected to the first and second terminals and
- a pair of second electrical contacts being electrically connected to one another, each second electrical contact of the pair of second electrical contacts being selectively displaceable with respect to a corresponding first electrical contact of the pair of first electrical contacts, along a longitudinal plane of the circuit breaker, between:
- a closed position, in which contact zones of said each second electrical contact and said corresponding first electrical contact are in contact with one another and are configured to permit flow of the DC electric current therebetween, and
- an open position, in which the contact zones are separated from one another;
- a pair of electric arc formation chambers in which the contact zones are respectively disposed;
- a pair of electric arc quenching chambers, each electric arc quenching chamber of the pair of electric arc quenching chambers being disposed adjacent to a corresponding electric arc formation chamber of the pair of electric arc formation chambers;
- and
- a pair of magnetic circuits each comprising a magnet, and a magnetic core extending at least partly along a respective first electrical contact of the pair of first electrical contacts, each magnetic circuit of the pair of magnetic circuits generating a magnetic field configured to guide, in a direction of the respective electric arc quenching chambers, electric arcs formed between the contact zones in the open position, the magnetic field having curved field lines extending essentially perpendicular to opposite lateral walls of the respective electric arc formation chambers, the lateral walls being disposed on either side of the contact zones and being essentially parallel to the longitudinal plane, the curved field lines converging, at a level of a central region of each of the electric arc formation chambers containing the respective contact zones, towards a corresponding electric arc quenching chamber of the pair of electric arc quenching chambers while extending parallel to the longitudinal plane.
6 more elements
Dependencies are inferred from the claim text.