Abstract:
A circuit breaker comprising a hollow insulating column, and an insulated cut-off chamber supported by the column and having movable and fixed contact members therein that are connected to terminals. An optical link current transformer is also provided and comprises a polarized light beam transmitter arranged at the bottom of the column which transmits a beam to the interior of the column, an optical Faraday element, and a toroidal winding directly securing one of the terminals connected to the contact members. The Faraday element is connected to the toroidal winding so as to be subjected to magnetic fields generated by current in the winding. Reflecting mirrors are provided in the column and in the cut-off chamber for transmitting light beams from the transmitter through the column and cut-off chamber and to the Faraday element. Additional reflecting mirrors are provided to transmit light beams from the Faraday element back through the cut-off chamber, the column and then to a photoelectric cell arranged at the base of the column.
Abstract:
The invention relates to a set of metal-clad bars for a high-tension unit. A metal casing contains an insulating gas and is formed by cylindrical lengths whose ends have flanges to connect them to the adjacent lengths. The set of bars is characterized in that said lengths are disposed in a longitudinal alignment, and at least one of the connection flanges of a length (12) is disposed in a plane which is inclined with respect to the longitudinal axis of the casing (1) and concurrent with the plane of the flange (22) situated at the other end of said length.
Abstract:
High-voltage high-power, multiphase electrical installation comprising, for each phase, at least two circuit fields that include, in each circuit field, a circuit breaker arranged between two current transformers, each of them discharging into the same load as the homologous current transformers of the other circuit fields having the same phase; isolating switches placed at the ends; earth isolators placed between the isolating switches and the current transformers. The magnetic circuit of the current transformers is crossed simultaneously by the conductor of the phase of the circuit field and by an auxiliary conductor connected; on the one hand, to a ground isolator and, on the other hand, to a ground point.