JP2013005504A - Solid insulation switch gear and assembly method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the assembly work of a solid insulation switch gear forming a power source system by stacking multiple molded electric members.SOLUTION: A solid insulation switch gear includes: a first frame 3 housing a first operation mechanism 2; a flange 4 fixed to the first frame 3; a first movable insulation part 6 fixed to the flange 4; a circuit breaker 7 connecting with the first movable insulation part 6; a rear surface side unit 1a having a first bus bar side current transformer 9 connecting with the circuit breaker 7; a second frame 18 fixed to the flange 4 through a dimension adjustment member; a second movable insulation part 20 fixed to the second frame 18; a second bus bar side current transformer 21 connecting with the second movable insulation part 20; and a front surface side unit having a disconnector 22 connecting with the second movable insulation part 20. The first bus bar side current transformer 9 is connected with the second bus bar side current transformer 21 by a coupling conductor 10.

Description

  Embodiments described herein relate generally to a solid-insulated switchgear in which an electric member constituting a power supply system is molded (cast) with an insulating material and an assembling method.

  Conventionally, this type of solid-insulated switchgear is configured by molding electrical members such as vacuum valves and conductors with an insulating material such as an epoxy resin, and combining them to form a power supply system (see, for example, Patent Document 1). .

  For this reason, depending on the power supply system, a large number of molded electrical members must be arranged in a box and connected together, making assembly work difficult. Moreover, although dimension control etc. are performed with each molded electric member, when many are stacked and connected, the height dimension of each phase may be uneven. In particular, in the case of adding a double busbar specification or a current transformer, there are many electric members to be connected, and dimensional management is difficult.

Japanese Patent Laid-Open No. 2005-6483

  The problem to be solved by the present invention is to provide a solid insulated switchgear that forms a power supply system by connecting a large number of molded electrical members, and that can facilitate assembly work. is there.

  In order to solve the above-described problems, a solid insulated switchgear according to an embodiment includes a first frame housing a first operation mechanism, a flange having one side fixed to the first frame, and other flanges. A first movable insulating portion fixed to one end of a side surface; a circuit breaker connected to one end of the first movable insulating portion and opened and closed by the first operating mechanism; and the circuit breaker A rear-side unit having a first bus-side current transformer connected to the cable, a cable-side current transformer connected to the other end of the first movable insulating portion, and the other end of the other side of the flange. A second frame which is fixed via the dimension adjusting member and which houses the second operation mechanism; a second movable insulating portion fixed to the second frame; and a second movable insulating portion A second bus-side current transformer connected to one end; A front-side unit that is connected to the other end of the movable insulating portion and that is opened and closed by the second operation mechanism, the first bus-side current transformer and the second The bus-side current transformer is connected by a connecting conductor.

The side view which shows the structure of the solid insulation switchgear which concerns on Example 1 of this invention. 1 is a power system diagram of a solid insulated switchgear according to a first embodiment of the present invention. The principal part expanded sectional view of the solid insulation switchgear which concerns on Example 1 of this invention. The front view which shows the liner of FIG. The principal part expanded sectional view of the solid insulation switchgear which concerns on Example 2 of this invention. The front view which shows the liner of FIG.

  Embodiments of the present invention will be described below with reference to the drawings.

  First, a solid insulating switch gear according to a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a side view showing a configuration of a solid insulated switchgear according to a first embodiment of the present invention, FIG. 2 is a power supply system diagram of the solid insulated switchgear according to the first embodiment of the present invention, and FIG. The principal part expanded sectional view of the solid insulation switchgear which concerns on Example 1 of this, FIG. 4 is a front view which shows the liner of FIG. The solid-insulated switchgear is a double bus and uses many current transformers that measure current.

  As shown in FIG. 1, the inside of the box 1 is divided into a rear side unit 1a occupying the floor portion and the entire rear surface portion, and a front side unit 1b from the front middle to the ceiling portion, with the dotted line as a boundary. ing.

  A first frame 3 that houses the first operating mechanism 2 is fixed to the floor surface of the box 1 in the back unit 1a. One side surface of the flange 4 is fixed to the upper part of the first frame 3 with bolts 5. A first movable insulating portion 6 in which a conductor is molded with an epoxy resin is fixed to the right side in the figure, which is one end of the other side surface of the flange 4. The first movable insulating portion 6 is a molded electric member that constitutes a power supply system. Hereinafter, what is molded is a similar electric member.

  One end of the first movable insulating portion 6 on the left side of the figure is connected to a circuit breaker 7 (CB) in which a blocking vacuum valve that is opened and closed by the first operating mechanism 2 is molded. Note that the symbols in parentheses correspond to the power supply system of FIG. The circuit breaker 7 is connected to a third current transformer 9 (CT3) in which a winding is molded via a linear connecting conductor 8 in which a conductor is molded. The third current transformer 9 is connected to one end of a U-shaped connecting conductor 10 in which a conductor is molded.

  A second current transformer 11 (CT2) and a first current transformer 12 (CT1) in which a winding is molded are connected in series to the other end on the right side of the first movable insulating portion 6 in the figure. A first grounding switch 13 (ES1) in which a switch is molded is connected to the first current transformer 12, and a branching instrument transformer 14 (VT) in which a winding is molded is connected. ing. The instrument transformer 14 is connected to a cable head 16 (CH) in which a conductor to which two power cables 15 are connected is molded.

  A second frame 18 that houses the second operation mechanism 17 is fixed to the front side unit 1 b with a bolt 19 on the left side in the figure, which is the other end of the other side surface of the flange 4. The bolts 19 and the bolts 5 are arranged alternately. A second movable insulating portion 20 in which a conductor is molded is fixed to the upper portion of the second frame 18 in the figure.

  A fourth current transformer 21 (CT4) in which a winding is molded is connected to one end on the right side of the second movable insulating portion 20 in the figure, and the other end of the connecting conductor 10 is connected to the fourth current transformer 21. Is connected. A first disconnector 22 (DS1) in which a disconnecting vacuum valve branched from the fourth current transformer 21 is molded is connected to an intermediate portion of the second movable insulating portion 20, and connected to an adjacent panel. It is connected to a first bus bar 23 (BUS1) in which a conductor to be molded is molded.

  A second disconnector 24 (DS2) in which a disconnecting vacuum valve is molded is connected to the other end on the left side of the second movable insulating portion 20 in the figure. The second disconnector 24 is connected to a second bus 25 (BUS2) molded with a conductor. A second earthing switch 26 (ES2) is provided between the first disconnector 22 and the second disconnector 24 and in the second movable insulating portion 20. The first disconnector 22, the second disconnector 24, and the second ground switch 26 are opened / closed by the second operation mechanism 17.

  Next, a method of fixing the back side unit 1a and the front side unit 1b will be described with reference to FIGS.

  As shown in FIG. 3, the second frame 18 whose end is bent in an L shape is fixed to the flange 4 with a bolt 19, but a liner 26 for adjusting the height can be inserted. . As shown in FIG. 4, the liner 26 has a horseshoe shape, bypasses the bolt 19, and is inserted between the temporarily fixed second frame 18 and the flange 4. The liner 26 becomes a dimension adjusting member having a predetermined thickness.

  In the assembly, each of the back side unit 1a and the front side unit 1b is assembled, and the front side unit 1b is put on the back side unit 1a for assembly. For this reason, in each of the back side unit 1a and the front side unit 1b, the number of the molded electric members can be reduced, and the assembling work can be facilitated. The number of molded electrical members to be stacked is small, and dimensional management in the height direction is easy.

  Further, in the connection of the connecting conductor 10, it is necessary to match the horizontal levels of the third current transformer 9 and the fourth current transformer 21, but the height can be adjusted by the liner 26. In this case, if the height direction of the electric member on the front unit 1b side including the fourth current transformer 21 is manufactured with a minus tolerance, adjustment with the liner is facilitated. When the horizontal levels of the third current transformer 9 and the fourth current transformer 21 match, the liner 26 is not necessary. Even in this case, since the liner 26 can be inserted, a dimension adjusting member is provided.

  Here, in the rear unit 1a, the electrical members to be assembled in advance are the first frame 3 that houses the first operating mechanism 2, the flange 4 that the first frame 3 is fixed to one side, and the flange 4 The first movable insulating part 6 fixed to the other side surface, the circuit breaker 7 connected to one end of the first movable insulating part 6, the connecting conductor 8, the third current transformer 9, and the first movable insulating part The second current transformer 11 and the first current transformer 12 are connected to the other end of the unit 6. The first ground switch 13, the instrument transformer 14, and the cable head 16 may be assembled, but have a tolerance in the height direction and depth direction of the box body 1, and it is necessary to strictly control the dimensions. And can be assembled in a later process. The cable head 16 is essential for configuring a power supply system.

  In addition, since the 3rd current transformer 9 and the connection conductor 8 can be integrated, this is called a 1st bus-line side current transformer. Moreover, since the 1st current transformer 12 and the 2nd current transformer 11 can be integrated, this is called a cable side current transformer.

  In the front side unit 1b, the second operating mechanism 17 is accommodated, the second frame 18 fixed to the other side surface of the flange 4, the second movable insulating portion 20 fixed to the second frame 18, the second A fourth current transformer 21 connected to one end of the movable insulating portion 20, and a first disconnector 22 and a second disconnector 24 connected to the other end. The first bus bar 23 and the second bus bar 25 may be assembled. However, there is a tolerance in the height direction of the box 1, and it is not necessary to perform strict dimensional control. Can do.

  Here, the fourth current transformer 21 is referred to as a second bus-side current transformer. For this reason, the units 1a and 1b are partitioned by the first bus-side current transformer and the second bus-side current transformer, and are connected by the connecting conductor 10. In the case of the single bus specification, the second disconnector 24 and the second bus 25 are omitted. The buses 23 and (25) are indispensable for constituting a power supply system. In the simple power system, the second ground switch 26 is omitted.

  According to the solid insulated switchgear of the first embodiment, the rear side unit 1a and the front side unit 1b are assembled in advance, and the second frame 18 of the front side unit 1b is attached to the flange 4 of the rear side unit 1a with the bolt 19. Since the units 1a and 1b are fixed and assembled, the number of molded electrical members can be minimized, and the assembly work can be facilitated. In addition, since the liner 26 can be sandwiched between the flange 4 and the second frame 18, the dimension adjustment in the height direction can be facilitated.

  Next, a solid insulation switchgear according to a second embodiment of the present invention will be described with reference to FIGS. FIG. 5 is an enlarged cross-sectional view of the main part of the solid insulating switch gear according to the second embodiment of the present invention, and FIG. 6 is a front view showing the liner of FIG. The second embodiment is different from the first embodiment in the dimension adjusting method for the front unit. In each figure, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 5, the height of the second frame 18 can be adjusted by using jack bolts 27. A liner 28 is inserted into the gap with the flange 4. The liner 28 has a plurality of horseshoe shapes as shown in FIG. For example, jack bolts 27 are passed through the horseshoe-shaped opening in the center of the figure, and bolts 19 are passed through the openings on both sides.

  According to the solid insulated switchgear of the second embodiment, in addition to the effects of the first embodiment, the height adjustment of the second frame 18 can be facilitated.

  According to the embodiment as described above, the molded electrical member constituting the power supply system is divided into the back side unit and the front side unit, and the front unit is assembled using the dimension adjusting member on the back side unit. Can be made easy.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 1 Box 1a Back side unit 1b Front side unit 2 1st operation mechanism 3 1st flame | frame 4 Flange 5, 19 Bolt 6 1st movable insulation part 7 Breaker 8, 10 Connection conductor 9, 11, 12, 21 Current transformer 13 Ground switch 14 Instrument transformer 15 Power cable 16 Cable head 17 Second operating mechanism 18 Second frame 20 Second movable insulating parts 22 and 24 Disconnectors 23 and 25 Buses 26 and 28 Liner 27 Jack bolt

Claims (6)

A first frame containing a first operating mechanism;
A flange having one side fixed to the first frame;
A first movable insulating portion fixed to one end of the other side surface of the flange;
A circuit breaker connected to one end of the first movable insulating portion and opened and closed by the first operating mechanism;
A first bus-side current transformer connected to the circuit breaker;
A back side unit having a cable side current transformer connected to the other end of the first movable insulating portion;
A second frame which is fixed to the other end of the other side surface of the flange via a dimension adjusting member and which houses a second operation mechanism;
A second movable insulating portion fixed to the second frame;
A second bus-side current transformer connected to one end of the second movable insulating portion;
A front side unit having a disconnector connected to the other end of the second movable insulating portion and opened and closed by the second operation mechanism;
A solid insulated switchgear, wherein the first bus-side current transformer and the second bus-side current transformer are connected by a connecting conductor.   The solid insulation switchgear according to claim 1, wherein the dimension adjusting member is a liner having a predetermined thickness.   The solid insulation switchgear according to claim 1 or 2, wherein a jack bolt is used for the second frame, and a dimension with the flange is adjusted.   The solid insulated switchgear according to any one of claims 1 to 3, wherein a cable head for connecting a power cable is connected to the cable-side current transformer.   The solid insulated switchgear according to any one of claims 1 to 4, wherein a bus bar is connected to the disconnector. A first frame containing a first operating mechanism;
A flange having one side fixed to the first frame;
A first movable insulating portion fixed to one end of the other side surface of the flange;
A circuit breaker connected to one end of the first movable insulating portion and opened and closed by the first operating mechanism;
A first bus-side current transformer connected to the circuit breaker;
A back side unit having a cable side current transformer connected to the other end of the first movable insulating portion;
A second frame which is fixed to the other end of the other side surface of the flange via a dimension adjusting member and which houses a second operation mechanism;
A second movable insulating portion fixed to the second frame;
A second bus-side current transformer connected to one end of the second movable insulating portion;
A front side unit having a disconnector connected to the other end of the second movable insulating part and opened and closed by the second operation mechanism;
A method for assembling a solid insulated switchgear comprising a connecting conductor connecting the first bus-side current transformer and the second bus-side current transformer,
First, assemble each of the back side unit and the front side unit,
Next, the second frame is fixed to the other side of the flange with a bolt,
Next, a method for assembling the solid insulated switchgear characterized by connecting the connecting conductors.

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