FR2806220A1 - HIGH VOLTAGE, POLYPHASE, SHIELDED, GAS INSULATED AND OUTDOOR TYPE DISTRIBUTOR DEVICE - Google Patents

Abstract

Polyphase, shielded, gas insulated, outdoor type high voltage distribution device having a circuit breaker (4) in the form of a horizontal tubular switch box (2) housing several switch units 6, in which it is associated with one connection (8) a distribution element (12) equipped with bushings for the outside (14) and with the other connection (9) a disconnecting and earthing element (16) with busbar ( 18) mounted on the downstream side, it is associated with the circuit breaker (4) a circuit breaker (5) symmetrical in the axial direction of the housing (2).

Description

HIGH VOLTAGE DISTRIBUTOR DEVICE. POLYPHASE, SHIELDED.

  INSULATED BY GAS AND TYPE FOR EXTERIOR

  The invention relates to a high-voltage, multi-phase, shielded, gas-insulated, outdoor type distributor device comprising a circuit breaker in the form of a tubular switch box arranged horizontally and housing several switch units, in which the switch units are provided with line connections driven radially out of the switch box provided with corresponding connection flanges and in which it is associated with a line connection a distribution element equipped with bushings of the outdoor type and at the other line connection a disconnecting and earthing element with a busbar mounted on the

downstream side.

  In a known high-voltage distributor device of this type (DE 197 20 093 A1), the busbar consists of an overhead line to which the high-voltage distributor device is connected by means of bushings of the outdoor type which are carried by a termination box which is

  placed on the isolating and earthing element.

  There is also known a single-phase shielded high-voltage distributor device (DE 29 29 054 A1) in which three switching units, which include circuit breaker, switch disconnector and earthing switch, are electrically connected in series. The shielded boxes housing the circuit breakers are arranged horizontally in this distributor device and are in front connection each time with a shielded element which carries a current transformer and in which are integrated both a grounding switch and a switch disconnector which deflects the current path vertically. While shielded elements adjacent to two switching units are connected together via a shielded element carrying a bushing for the outside or by means of a connection connected to a bushing for the outside, a bushing for the exterior is placed in the screened element in which the isolating switch and the earthing switch are integrated and which is mounted each time at the two ends of the three switching units connected one behind the other. The invention relates to a high voltage distributor device of the type mentioned in the introduction which comprises at least two circuit breakers and which requires a relatively small mounting location, while having a minimum construction height. o0 This problem is solved according to the invention by the fact that it is associated with the first mentioned circuit breaker (2, 4) a second circuit breaker (3, 5) designed of the same type and arranged symmetrically as in a mirror with respect to the direction axial of the tubular switch housing (2), the disconnecting and earthing elements (16, 17) being designed as corner elements (21, 22) and being connected in common to a busbar

  branching manifold (23), shielded and interposed therebetween.

  With a design of the dispensing device of this kind, the switch units of the circuit breakers can be arranged inside the respective switch housing, tubular and arranged horizontally, so as to be next to each other in a triangle or in a plan. In addition, the distribution elements are equipped with separate terminals which move upwards for the bushings for the exterior. In doing so, the outside crossing terminals lying in a plane are separated so that the middle outside crossing is arranged vertically and the other two outside outside bushings are arranged in

  making an angle with the crossing for the middle exterior.

  However, the crossings for the exterior can also be in an inclined plane with respect to the vertical and therefore form a certain angle with each other.

with the others.

  In one embodiment of the invention, it is advantageous for the armored bypass busbar to include a connecting element connecting

  the corner elements and arranged horizontally.

  In an embodiment of the connecting element as a cross element, it is possible to connect to the connecting element, on one side or on both sides, each time a cable connection or an overhead line connection or other elements of an armored busbar. The connecting element can also be designed so that the bypass busbar is connected on one side of the connecting element. But if the connection of the busbar is provided on two opposite sides of the connecting element, it is possible to produce at the same time with the high-voltage distributor device according to the invention a circuit called "circuit H" which also satisfies the requirements of 'a ring circuit; in the event of a failure in one of the elements of the installation - these can be transformers which are connected to the armored bypass busbar on two opposite sides -, the mains operation can be maintained via the

  second installation element, i.e. the second transformer.

  In the connecting element, there is advantageously associated with each cable or overhead line connection or with each busbar a combined switch disconnector and earthing so that separation can be effected in the event of a breakdown. between the high-voltage distributor device and the respectively connected installation element, an

  the earth of the installation element being carried out at the same time.

  In another embodiment of the invention, the distribution element associated with each circuit breaker and equipped with bushings for the exterior is connected to the connection flange of the switch housing by means of a disconnector element and earthing designed as a corner element. In doing so, the combined disconnector and earthing switches are generally designed as known combined disconnector and earthing switches

  (DE 196 32 574 A1 and DE 198 25 386 A1).

  In the high-voltage distribution device, an intermediate box housing a three-pole current transformer can be arranged between that of the connection flanges of each switch box via which a multipole line connection is connected to the bushings for the exterior and the associated distribution element or the associated corner element. - However, an intermediate box housing a three-pole current transformer can also be mounted between the other connection flange of each switch box and the corner element connected to the connecting element. As two three-pole current transformers are thus associated with the switch units of each circuit breaker, disturbances can appear when there are

  differences between the currents measured on both sides of each circuit breaker.

  - Intermediate boxes housing current transformers

  three-pole are known (DE 298 06 652 Ul).

  The connecting element arranged horizontally, the corner elements and

  the distribution elements advantageously have a horizontal common axis.

  To guarantee this characteristic even when a single three-pole current transformer is associated with each circuit breaker of the high-voltage distribution device, that of the connections of each switch box to which no current transformer is associated must be longer than

the other branch.

  The new high-voltage distributor device can also be equipped with at least one voltage transformer fixed by a flange to a distribution element. Other characteristics and advantages of the invention will emerge more

  clearly on reading the description below, made with reference to

  attached drawings, which represent two exemplary embodiments, and which show: Figure 1: a view - partially in section - of a three-phase high-voltage distributor device, shielded, isolated by gas and of the type for the exterior; Figure 2: a view - partially in section - of the high voltage distributor device according to Figure 1 which is completed by other installation components; and Figure 3: a partial view of the high dispenser devices

tension according to figures 1 and 2.

  In the high-voltage distributor device according to FIG. 1, two switch boxes 2, 3 tubular and arranged horizontally are provided symmetrical as in a mirror, with respect to a vertical axis 1, on the two sides of this axis. Each switch box 2, 3 houses a circuit breaker 4, 5, the switch units 6, 7 each correspond to the number of phases of the high voltage distributor device. The line connections 8, 9 of the switch units 6, 7 are guided radially out of tubular switch boxes 2, 3 provided with connection flanges 10, 11. While the line connections 8 of the switch units 6 , 7 of the two circuit breakers 4, 5 are connected each time via a distribution element 12, 13 with bushings for the exterior 14,15 with which the distribution elements 12, 13 are fitted, the connections of lines 9 of the switch units 6, 7. of the two circuit breakers 4, 5 are connected each time via a disconnector and earthing element 16, 17 to phase conductors 18 of the connecting element 24 which surrounds a busbar 23. Via the phase conductors 18, which are in turn connected to the busbar 23, the combined disconnector and earthing switches 19, 20 of the two disconnector elements and updating erre 16, 17 are in galvanic connection. The disconnecting and earthing elements 16, 17 are designed as elements

of angles 21.22.

  As further shown in FIG. 1 in relation to FIG. 3, the phase conductors 18 connecting the combined disconnector and earthing switches 19, 20 are designed as branches with respect to the busbar 23. Against the connecting element 24, there are shielded boxes 26 to which is connected each time a cable connection 27, 28 to which can be connected each time a transformer not shown in detail. However, it can also be seen in FIG. 3 that a combined disconnector and earthing switch 29, 30 is connected upstream of each cable connection 27, 28 and therefore of each transformer connected to the distributor device.

high tension.

  While in the high-voltage distributor device of FIG. 1, a voltage transformer 31, 32 is fixed by flange to each distribution element 12, 13, an intermediate box 35, 36 housing a three-pole current transformer 33, 34 is provided between the connection flanges 10 of the tubular switch boxes 2, 3 and the distribution elements 12, 13 so that a current transformer is associated with the line connections 8 of the switch units 6, 7. So that, from this assembly of current transformers 33, 34, the connecting element 24 arranged horizontally, the angle elements 21, 22 and the distribution elements 12, 13 are mounted on a common axis 37 horizontal, the connections 38 switch boxes 2, 3 tubular have a greater length than the connections 39 to the connection flange 10 of which the intermediate box 35, 36 housing the three-pole current transformer e 33, 34 is fixed. The high voltage distributor device according to FIG. 2 corresponds overall to that of FIG. 1. This means that, in this high voltage distributor device also, switch boxes 2, 3 tubular s arranged horizontally are provided symmetrical as in a mirror, with respect to a vertical axis 1, on both sides of this axis 1. In this high-voltage distributor device, the disconnecting and earthing elements 16, 17 are also designed as angle elements 21, 22 and are in connection via a connecting element 24 disposed horizontally 0o which houses the phase conductors 18 and the busbar 23 (see also Figure 3) which is connected via combined switches disconnectors and setting to earth 29, 30 with cable connections 27,

  28 provided on both sides of the connecting element 24.

  Relative to the high-voltage distributor device of FIG. 1, the high-voltage distributor device of FIG. 2 however includes other associated disconnecting and earthing elements 40, 41 which are designed as corner elements 42, 43 and each of which is associated with a circuit breaker 4, 5. In doing so, the disconnecting and earthing elements, 41 are connected on the one hand with the distribution elements 12, 13 equipped with bushings for the exterior 14, 15 and on the other hand with the connection flanges 10 of the tubular switch boxes 2, 3 via the intermediate boxes 35, 36 housing the three-pole current transformers 33, 34. In addition, in the high-voltage distributor device according to FIG. 2, a three-pole current transformer 44, 45 is connected each time between the connection flanges 11 of the switch units 6, 7 and the disconnector and earthing elements 16 , 17 and is housed in an intermediate box 46, 47. - By a second three-pole current transformer 44, 45 and by an identical length for the connections 38, 39 of the switch boxes 2, 3 tubular, we ensure that the connecting element 24 disposed horizontally, the corner elements 21, 22, 42, 43 and the distribution elements 12, 13 are mounted on a common axis 37 horizontal. In both the high-voltage distributor device of FIG. 1 and in that of FIG. 2, a switch control 50, 51 is provided frontly with respect to the tubular switch boxes 2, 3 which are

  each mounted on a supporting frame 48, 49.

  List of references 1 vertical axis 2, 3 horizontal tubular switch box 4, 5 circuit breaker 6, 7 switch unit 8, 9 line connection, 11 connection flange 12, 13 distribution element 14,15 type crossing outside 16, 17, 40, 41 disconnector and earthing element 18 phase conductor 19, 20, 29, 30 combined disconnector and earthing switch 21,22, 42, 43 corner element 23 busbar 24 connecting element 26 shielded box 27, 28 cable connection 31 voltage transformer 33, 34, 44, 45 three-pole current transformer, 36, 46, 47 intermediate box 37 horizontal axis 38, 39 connection 48, 49 support frame , 51 switch control

Claims (7)

  1. Polyphase high voltage distributor device, shielded, gas-insulated and of the outdoor type, comprising a circuit breaker (4) in the form of a tubular switch box (2) arranged horizontally and accommodating several switch units (6), in which the switch units are provided with line connections driven radially out of the switch housing provided with corresponding connection flanges, and in which it is associated with a line connection (8) a distribution element ( 12) equipped with bushings of the outdoor type (14) and at the other line connection (9) a disconnector and earthing element (16) with busbar (18) mounted on the downstream side, characterized by the fact that, to produce an electrical distribution installation comprising at least two circuit breakers, there is associated with the first mentioned circuit breaker (2, 4) a second circuit breaker (3, 5) constituted in the same way and available dared symmetrically as in a mirror with respect to the axial direction of the tubular switch box (2), the disconnecting and earthing elements (16, 17) being designed as corner elements (21, 22) and being connected in common to a bar   branching manifold (23), shielded and interposed therebetween.   2. High-voltage distributor device according to claim 1, characterized in that the shielded bypass busbar (23) comprises a connecting element (24) arranged horizontally and connecting the corner elements (21, 22).   3. High-voltage distributor device according to claim 1 or 2, characterized in that the distribution element (12, 13) associated with each circuit breaker (4, 5) and equipped with bushings of the outdoor type (14, ) is in connection with the connection flange (10) of the switch box (2, 3) via a disconnector and earthing element (40,   41) designed as a corner element (42, 43).   4. High voltage distributor device according to one of claims 1 to 3,   characterized in that an intermediate housing (35, 36) housing a three-pole current transformer (33, 34) is mounted each time between a connection flange (10) of each switch housing (2, 3) and o the associated distribution element (12, 13) or the associated corner element (42, 43) to the distribution element.   5. High voltage distributor device according to claim 4, characterized in that, in addition, an intermediate housing (46, 47) housing a three-pole current transformer (44, 45) is also disposed between the other connection flange ( 11) of each switch housing (2, 3)   and the associated corner element (21, 22).   6. High voltage distributor device according to one of claims 1 to 5,   characterized in that the connecting element (24) arranged horizontally as well as the corner elements (21, 22, 42, 43) and the   distribution elements (12, 13) have a common horizontal axis (37).   7. High voltage distributor device according to one of claims 1 to 6,   characterized in that a voltage transformer element (31, 32)   is attached by flange to at least one of the distribution elements (12, 13).