Alsthom-atlantique

Delle-alsthom

Societe Anonyme Dite: Delle-alsthom

Doan Pham Van

Dante Nicoloso

Edmond Thuries

Compressed gas circuit breaker

A pressurized gas circuit breaker capable of having a breaker chamber dismantled therefrom without loss of dielectric gas comprises: a vertical insulating support (101); a intermediate structure (100) mounted on said support and at least two breaker chambers (1, 1') per phase. Said chambers are disposed in a V-configuration on said intermediate structure, and said support and said breaker chambers are filled with gas under pressure. The circuit breaker further comprises a control jack (32) situated at the bottom of the support, and means for transmitting motion from the jack to the chambers to operate circuit breaking means located therein. Said means for transmitting motion comprise: gas-tight guide tube means (2, 2') filled, in use, with gas under pressure and having a straight insulating portion (102) situated inside the vertical insulating support and curved portions (103) situated inside said intermediate structure and leading to respective ones of said breaker chambers. Control shaft means (42, 42') are mounted with a sliding fit inside said guide tube means, and have one end connected to said control jack, and other ends connected to respective ones of said breaker chambers. The portions (107) of said control shaft means that slide in the curved guide tube portions are flexible. Each breaker chamber is fitted with a respective sliding air-lock (see FIG. 2) capable at one end of sealing the breaker chamber and at another end of sealing the guide tube means. Said air-lock comprises two separable members one of which is made fast to the breaker chamber and the other of which is made fast to the guide tube means, and said control shaft means comprise coupling means located inside said air-lock to enable the control shaft means to be separated into a first portion connected to the breaker chamber and a second portion connected to the guide tube means.

Pressurized gas circuit breaker including two V-mounted breaker chambers

Pressurized gas circuit-breaker for very high voltages having opening and closing resistors, comprising, in a main insulative enclosure (1), a fixed contact (21, 101), a movable contact (32, 34, 62), a closing resistor (8) and a device (19) for inserting the closing resistor, the circuit-breaker further comprising, in an auxiliary insulative enclosure (120), a movable auxiliary contact (121), a fixed auxiliary contact (131) and an opening resistor (133), the circuit-breaker being characterized in that the movable auxiliary contact (121) is moved by a mechanism disposed in a casing (150) common to both enclosures (1, 120) and on the side of the fixed contact (21, 101), the mechanism comprising a link-crank assembly (152, 152') and a bell-crank lever having two arms (154A, 154B). Application to circuit-breakers for very high voltages.

Pressurized gas circuit-breaker having opening and closing resistors

The invention relates to a resistance switch-in device for switching in only when a circuit breaker closes, said switch-in device including a moving arcing contact in an interrupter chamber. The device is characterized in that the switch-in contacts (2 and 3, 32 and 33) are disposed in the interrupter chamber (1) of the circuit breaker and that since at least one (2,32,33) of said switch-in contacts is a moving contact, it moves on a path parallel to that of the moving arcing contact (5). The invention applies in particular to connecting a load to long-distance high-tension circuits that are unloaded.

Device for switching in a resistance when a circuit breaker closes a

The invention relates to a current cut-out circuit for a high-voltage electric installation, a current source being located on an input side and an earth fault possibly occurring on its output side. The circuit is characterized in that between the input and the output, it includes for each phase, in series, a cut-out device (1) with a high arcing voltage, said device opening very rapidly, and a circuit-breaker (2) which opens rapidly and, shunt-connected between the input of the cut-out device with a high arcing voltage and earth, a resistance (4) for limiting an earthing current which passes via an automatic cut-out (3) with a very short closing time and a short opening time. Structure (5) is provided for performing the sequence of following operations in a time shorter than half a period: closing the automatic cut-out, opening the high arcing voltage device, opening the rapid-opening circuit-breaker and the automatic cut-out, and, when the current passes through zero, cutting out the high arcing voltage device, the rapid-opening circuit-breaker and the automatic cut-out. The invention applies to protecting switchgear.

H.V. current cut-out circuit

A reciprocating rod bears a bridge which is movable on the rod with initial movement of the rod in a given direction completing closure of bridge carried moving contacts onto stationary contacts for inserting a resistance in a circuit during closure. Linkage between the rod and main contacts functions to subsequently close the main contacts of the cut-out switch, thereby shorting the resistor. Continued movement of the rod in a given direction subsequently causes the bridge borne contacts to move away from the stationary contacts, thereby opening the circuit through the resistors.

Device for switching in closing resistors for high-voltage cut-out

High-voltage interconnection circuit-breaker, having connected in parallel, in the first instance a main chamber, having a cut-out power, comprising a rapid functioning on opening and provided for an opening-closing cycle; in the second instance a very rapid closing chamber having a closing power and resistance to overcurrents which lasts a very short time; and in the third instance in series, a resistor and a cut-out chamber for the current reduced by the resistor.

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Meyzieu, France

Doan Pham Van