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AssigneeSchneider Electric Industries SAS
InventorsHervé Anglade, Christophe Grumel, Marc Rival, Jean-Paul Gonnet
Estimating the term…
A single-pole breaking unit which includes a rotary contact bridge, a stationary contact operating with the contact bridge and connected to a current input, a rotary bar having radially extending axial end surfaces, and radial side surfaces with a transverse hole for the contact bridge which is salient through opposite radial side surfaces of the bar, an arc extinguishing chamber opening onto an opening volume for the contact bridge, two parallel side panels parallel to the axial end surfaces of the bar, with the rotary bar located between two sealing flanges between the axial end surfaces of the rotary bar and the side panels and movable axially toward the side panels to ensure tightness between the inside and the outside of the breaking unit, the sealing flanges each comprising a radially extending portion, and a cylindrical portion, both co-axial with the rotary bar, which cylindrical portion has an inside radius slightly less than the radial extent of the rotary bar, providing a space between the inside surface of the cylindrical portion and the rotary bar, the space permitting quenching gases to flow directly to push a sealing flange axially against a side panel to achieve tightness.
A single-pole breaking unit comprising:
The breaking unit according to claim 10, 12, wherein said at least one gas exhaust channel (42) of an arc extinguishing chamber (24) passes through at least one decompression chamber (43) comprising at least one inner wall covered by a metal sheet (85).
Dependencies are inferred from the claim text.
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From the US filing history. Foreign family members aren’t listed.
Backward citations are indexed for grants only.
Details: means for extinguishing or suppressing arc
Stationary parts for restricting or subdividing the arc, e.g. barrier plate: venting arrangements for arc chutes
Rotating bridge: rotating bridge being assembled in a cassette, which can be placed as a complete unit into a circuit breaker
Metal parts: using U-shaped plates
Term end not estimated
The invention relates to a single-pole breaking unit comprising a rotary contact bridge, at least one stationary contact operating in conjunction with said contact bridge and connected to a current input conductor, a rotary bar having a transverse hole accommodating said contact bridge with clearance, which contact bridge is salient on each side of the bar, said rotary bar being inserted between two side panels of the breaking unit, said side panels being substantially parallel to one another. The rotary contact bridge also comprises two sealing flanges respectively placed between the radial surfaces of the rotary bar and the side panels to ensure tightness between the inside and the outside of the breaking unit. At least one arc extinguishing chamber opens onto an opening volume of the contact bridge.
The invention also relates to a switchgear device comprising such a breaking unit.
The invention also relates to a circuit breaker comprising such a switchgear device.
Other advantages and features will become more clearly apparent from the following descriptions of particular embodiments of the invention, given for illustrative, not restrictive exemplary purposes only, as represented in the appended drawings, wherein:
FIG. 1A shows a cross-sectional side view of a known single-pole breaking unit.
FIG. 1B shows a perspective view of a rotary bar of the breaking unit of FIG. 1A.
According to an embodiment of the invention, the circuit breaker 100 comprises a trip device 7 associated with a switchgear device 600.
The switchgear device 600 according to the invention comprises at least one single-pole breaking unit 10. The single-pole breaking unit according to the invention is designed to be connected on the one hand to the trip device 7 at the level of the load-side terminal strip 5 and on the other hand to a current line to be protected at the level of a load-side terminal strip 4. The single-pole breaking unit 10 is also called a cartridge.
According to a preferred embodiment of the invention as represented in FIGS. 3A, 3B, the switchgear device 600 comprises three single-pole breaking units. The switchgear apparatus 100 is then a three-pole circuit breaker. According to other embodiments which are not represented, the switchgear apparatus could be a single-pole, two-pole or four-pole circuit breaker.