Abstract: The invention relates to a reflectometry system for detecting faults on a hardened multipoint connector of an electrical network, of the type that comprises a measuring probe, characterized in that it comprises an interfacing and impedance matching part that is electrically suitable for mounting on the connector to be tested and comprises a body provided with at least one element in the form of a collector ring for the contact masses of the connector and a measuring opening for the probe of the reflectometry system.

Abstract: The invention relates to a reflectometry system for detecting faults on a hardened multipoint connector of an electrical network, of the type that comprises a measuring probe, characterized in that it comprises an interfacing and impedance matching part that is electrically suitable for mounting on the connector to be tested and comprises a body provided with at least one element in the form of a collector ring for the contact masses of the connector and a measuring opening for the probe of the reflectometry system.

Abstract: A medium-, high-, or very high-voltage circuit breaker (10), comprising at least one arc-control chamber (12) and an outer casing (14) in which the arc-control chamber (12) is arranged. In the invention, the circuit breaker includes sealing ring (52) for sealing an opening (50) in a discharge cap (40) of the arc-control chamber (12), the ring (52) being movable between a sealing position and a retracted position in which they allow the gas to pass, the circuit breaker being configured in such a manner that in the closed position, the sealing ring (52) are in their retracted position, and in such a manner that passage from the retracted position to the sealing position takes place during an operation of opening the circuit breaker.

Abstract: The invention relates to a medium-, high-, or very high-voltage circuit breaker, comprising at least one arc-control chamber and an outer casing in which the arc-control chamber is arranged. The circuit breaker includes a discharge cap (40) forming a portion of the outer wall external of the arc-control chamber (12), the discharge cap being situated inside the outer casing and internally defining a gas-flow chamber (31). In the invention, the discharge cap (40) includes at least one portion (40?) that is movable under the effect of the gas pressure in the gas-flow chamber (31), in such a manner that its volume is extensible.

Abstract: A medium-, high-, or very high-voltage circuit breaker (10), comprising at least one arc-control chamber (12) and an outer casing (14) in which the arc-control chamber (12) is arranged. In the invention, the circuit breaker includes sealing ring (52) for sealing an opening (50) in a discharge cap (40) of the arc-control chamber (12), the ring (52) being movable between a sealing position and a retracted position in which they allow the gas to pass, the circuit breaker being configured in such a manner that in the closed position, the sealing ring (52) are in their retracted position, and in such a manner that passage from the retracted position to the sealing position takes place during an operation of opening the circuit breaker.

Abstract: The invention relates to a medium-, high-, or very high-voltage circuit breaker, comprising at least one arc-control chamber and an outer casing in which the arc-control chamber is arranged. The circuit breaker includes a discharge cap (40) forming a portion of the outer wall external of the arc-control chamber (12), the discharge cap being situated inside the outer casing and internally defining a gas-flow chamber (31). In the invention, the discharge cap (40) includes at least one portion (40?) that is movable under the effect of the gas pressure in the gas-flow chamber (31), in such a manner that its volume is extensible.