FR2841039A1 - High voltage shielded post, includes circuit breaker with closure resistor mounted in a conducting bar - Google Patents

Abstract

The high voltage shielded post comprises a circuit breaker enclosed by a case (4) extending along an axial direction (AX), the circuit breaker being associated with an electrically conductive hollow bar (4A, 4B) which is electrically connected to a first arc contact (11') of the circuit breaker when the latter is closed. A closure resistor (6B) is arranged inside the hollow bar (4B) and is electrically connected to the circuit breaker by a component inserting appliance (10), the bar immersed in the case to form an angle with the axial direction (AX). The closure resistor is electrically connected via the component insertion appliance (10) to a second arc contact (12'), which is electrically insulated from the hollow bar at least when it is separated from the first arc contact (11').

Description

flat. The invention relates to a high voltage shielded posse, comprising

  among other things a circuit breaker, an insertion resistor and an electrically conductive bar connecting the circuit breaker to the rest of the posse. Such a shielded posse is described for example in the French patent application, cais n 9812621. In this shielded posse, the circuit breaker is placed inside an envelope and the insertion (or closing) resistance is mounted at an extremity of

  the envelope inside a tank fixed to the envelope by a flange.

  Other configurations exist where the insertion resistance and its wind reservoir arranged in parallel with the casing of the circuit breaker, or else the case where the insertion resistance is arranged inside the casing of the circuit breaker. These penalizing insertion resistance provisions

  for the dimensions of the circuit breaker and for the dimensions of the shielded posse.

  The object of the invention is to remedy this drawback by proposing a

more compact shielded poses.

  To this end, the invention relates to a high-voltage shielded posse comprising an electrically conductive bar connected to a circuit breaker, and an insertion resistance, characterized in that said

  insertion resistance is arranged inside the busbar.

  The size of the circuit breaker with resistors is thus limited, which

  Significantly reduces the size of the blind posse.

  According to a particular embodiment of a shielded posse according to the invention, the conductive bar is a tube, and the insertion resistance extends inside this tube. This insertion resistance is electrically connected to the circuit breaker by an inserter fixed at one end of the busbar, the inserter comprising a relic sliding contact on the one hand

  at the insertion resistance and on the other hand at one of the contacts of the circuit breaker.

  The inserter is thus electrically connected to the bar and to the resistance

  to direct the current towards the bar or towards the resistance.

  Advantageously, the sliding contact of the inserter consists of a first cylindrical support which is movable in a second fixed support in the direction of displacement of the movable contact of the circuit breaker. The second fixed support of the inserter is connected by a conductive rod to the insertion resistance, the conductive rod penetrating inside a housing of the inserter

  which is fixed at the end of the bar.

  :. - The invention will now be described in more detail, and with reference to the accompanying drawings which illustrate an embodiment by way of example.

not limiting.

  Figure 1 is an overview of a circuit breaker and the insertion resistors forming part of the shielded posse according to the invention; Figure 2 is a schematic view of a hollow conductive bar inside which is mounted an insertion resistance; Figure 3 is a schematic representation of the inserter fitting the posse according to the invention during the closing of the circuit breaker; Figure 4 is a schematic representation of the inserter equipping the

  installed according to the invention in a closed state of the circuit breaker.

  Figure 1, the shielded posse includes, among other things, a metal casing

  1 which surrounds a circuit breaker extending in a longitudinal direction AX.

  In this example, the circuit breaker includes two soul-sets of

  break 2A and 2B arranged on either side of an actuator 3. The sub-

  cut-off assemblies 2A, 2B wind spaces along the longitudinal direction AX which is here horizontal and each of them is electrically connected to a corresponding vertical conductor bar 4A, 4B also surrounded by the metallic envelope 1. This metallic envelope comprises a tank 4 which surrounds the circuit breaker and two ferrules A, 5B each surrounding a corresponding conductive bar 4A, 4B. Each ferrule substantially forms a tube extending vertically around the corresponding conductive bar and is fixed by a plurality of bolts to a corresponding nozzle of the tank 4. This posse is equipped with two insertion resistors each cooperating with a soul-ensemble cut-off 2A, 2B to reduce the amplitude of the overvoltages injected into the

  electrical network when closing the circuit breaker of the shielded posse.

  According to the invention, each insertion resistance is arranged inside a conductive bar 4A, 4B. Figure 2 is a more detailed representation of a busbar 4B which substantially defines a hollow tubular shape. The insertion resistance 6B which here has a cylindrical shape is mounted inside the busbar 4B while being arranged in a manner that is substantially coaxial therewith. In the example given in Figure 2, the insertion resistance is electrically isolated from the busbar by the

  dielectric gas contained in the envelope of the shielded posse.

  J The insertion resistance is kept centered inside the busbar 4B by two pieces 7 and 8 mounted respectively at each end of the busbar 4B. The centering piece 8 which is electrically insulating, is located at the lower end of the busbar 4B. Wile is fixed on its periphery to the internal surface of the conductive bar by being crossed in its center by a conductive rod 9 situated in the extension of the insertion resistance. This conductive rod 9 is electrically connected to the lower end of the insertion resistance 6 B. As shown in FIG. 3, the lower end of the conductor bar and of the wind insertion resistance electrically connected to an inserter 10 which extends along the axis AX which is the axis of displacement of the movable contacts of the breaking soul-assemblies 2A and 2B. This inserter 10 cooperates with a movable contact 11 of the cut-off soul-assembly 2B. More particularly, the inserter 10 is mounted inside a casing 17 which is fixed to the lower end of the conductive bar 4B, this casing 17 thus being electrically connected to the conductive bar 4B. The conductive rod 9 penetrates into the casing 17 to be electrically connected to a first movable support 14 which is a movable contact of the inserter 10 by means of a tubular sliding contact element 15 which is fixed and electrically connected to the conductive rod 9. In what follows, the second fixed support of the inserator designates this element 15 intended to form a sliding contact with the first mobile support 14 while partially supporting the latter. A fixed contact 12 is fixed to the casing 17 by means of an electrically insulating part 18 while being positioned along the axis AX. The inserter 10 coaxially surrounds the fixed contact 12, being arranged to electrically connect the movable contact 11 of the cut-off soul 2B to the conductive rod 9 during the appearance of an electric arc between the parts 11 and 12 so that the current flows through the insertion resistance 6B, which corresponds to the state shown in FIG. 3. The inserter 10 is also arranged to electrically connect the movable contact 11 to the busbar 4B so that the electric current flows through the busbar end of closing of the inserter which corresponds to the state

shown in figure 4.

  As shown in Figures 3 and 4, the movable contact 11 comprises a piece 13 of insulating material which surrounds its end 11 'and which is in abutment against a first movable support 14 of the inserter. This first mobile support 14 has a substantially cylindrical shape which surrounds the fixed contact 12 to which it is electrically connected. This first mobile support is able to move in translation along the axis AX when it is driven in movement by the part 13 against a return spring 14 '. The first mobile support 14 is also free to slide inside a second fixed support 15 to which it is electrically connected to form a sliding electrical contact. The second fixed support 15 is held in

  position by the conductive rod 9 to which it is electrically connected.

  More particularly, the second fixed support 15 of the inserter 10 has a substantially cylindrical shape which surrounds the first mobile support 14 to leave it free to slide along the axis AX. According to the invention, the conductive rod 9 is situated in the extension of the insertion resistance, so that it penetrates into the casing 17 so as to be electrically connected to the second fixed support 15 of the inserter 10. With this arrangement , The inserter 10 can be fixed at the lower end of the busbar while being electrically connected to the busbar through its

  casing 17, and the insertion resistance, thanks to the conductive rod 9.

  On closing of the circuit breaker, the end 11 'of the movable contact 11 is approached the end 12' of the fixed contact 12, which causes the appearance of an arc between these two contacts, so that the current flows through the fixed contact 12, the first movable support 14, and the second fixed support 15 of the inserter to reach the insertion resistance through the conductive rod

9, as shown in fig. 3.

  After the movable contact 11 is in contact with the fixed contact 12, the movable support 14 of the inserter comes into contact with a fixed contact 16 of the inserter which is electrically connected to the busbar 4B via the casing 17 to which it is fixed, which corresponds to the state shown in fig. 4. In this situation, the current flows through the movable contact 11, the fixed contact 12, the movable support 14 and the fixed contact 16 of the inserter to reach the busbar 4B, so that the insertion resistance is short. -circuitee. At the end of closing of the circuit breaker, the movable contact 11 continues its course to reach a position not shown in which its end is engaged in the casing 17. Thus, the movable contact is electrically connected to the casing so as to significantly increase the contact section to ensure the passage of the permanent current in towards the conducthce bar with bending

rdslstance dinsedion.

  The invention can be applied to other types of Dixon jers, by padding single-chamber cut-off dionctors, esLA-dke component an seal under tad qua 2A or 2B cut-off assembly and an imur seal

Claims (4)

  1 / High voltage shielded substation comprising an electrically conductive bar (4B) connected to a circuit breaker, and an insertion resistance (6B), characterized in that said insertion resistance (6B) is arranged at   inside the busbar (4B).   21 shielded station according to claim 1, wherein the conductive bar (4B) is a hollow tube, and wherein said insertion resistance (6B) extends inside the conductive bar (4A) in a con sensibly coaxial with the axis of said tube.   3 / shielded station according to claim 2, wherein the insertion resistance (6B) is electrically connected to the circuit breaker by an inserter (10)   which is fixed at one end of said conductive bar (4B).   41 shielded station according to claim 3, wherein the inserter (10) comprises a sliding contact (14, 15) relic on the one hand to the resistance   insert (6B) and on the other hand to one of the contacts (12) of the circuit breaker.   51 shielded post according to claim 4, in which the sliding contact (14, 15) of the inserter consists of a first cylindrical support (14) which is movable in a second fixed support (15) in the direction of   displacement (AX) of the movable contact (11) of the circuit breaker.   6 / shielded station according to claim 5, wherein the second fixed support (15) of the inserter (10) is connected by a conductive rod (9) to the insertion resistance (6B), the conductive rod (9) penetrating inside a   casing (17) of the inserter which is fixed at the end of the busbar (4B).   7 / shielded station according to claim 6, wherein the first movable support (14) of the inserter comes into contact, at the end of the inserter stroke, with a fixed contact (16) electrically connected to said conductive bar (4B )