JP2012142149A - Insulation barrier attachment structure for electric power switch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an insulation barrier attachment structure which is improved so that one kind of the insulation barrier can satisfy all the requirements by commonly using components between an interphase insulation barrier and a lateral insulation barrier for an electric power switch.SOLUTION: An insulation barrier attachment structure is applied to an interphase insulation barrier and a lateral insulation barrier for an electric power switch which mounts multiple-poles switches on a base side by side. In an insulation barrier 5, an attachment metal fitting 6 fixed to an insulation plate 5a has a bolt fastening on the base to support the insulation barrier in an erect posture. In screw seats 6a and 6b protrusively formed from both ends of the attachment metal fitting 6 to lateral direction, U-shaped grooves 6a-1 and 6b-1 that fit into fastening bolts are formed in which opening ends of the U-shaped grooves are oriented so as to face each other. When installing the insulation barrier to the switch, the insulation barriers applied to the interphase insulation barrier 5A, and at least one of the right and left lateral insulation barriers 5B are bolt-fastened to the base in the same direction, while the insulation barrier applied to the other lateral insulation barrier 5C is turned at 180 degrees and bolt-fastened to the base.

Description

  The present invention relates to an insulating barrier mounting structure applied to a power switching device such as a disconnect switch or a load switch.

  As is well known, the high voltage switchgear installed in the power receiving / transforming equipment is equipped with an insulation barrier (optional product) to ensure insulation between phases and ground and to prevent short circuit accidents due to falling foreign matters.

  Next, taking a tripolar disconnector as an example, a mounting structure of an insulation barrier (conventional product) attached to the disconnector is shown in FIGS. 3 and 4, reference numeral 1 is a base of a disconnector, 2 is a disconnector corresponding to R, S, and T phases of a three-phase power distribution circuit mounted on the front side of the base 1 side by side. The control lever is linked to the disconnector 2 of each phase via the phase-separation switch 2 of the R, S, T phase, and between the left and right sides, as shown in FIG. A surface insulating barrier 5 </ b> B and a right side insulating barrier 5 </ b> C are arranged on the base 1. As will be described later in detail, the insulating barrier is erected in an upright position by being fastened to the base 1 with a bolt 7 via a mounting bracket 6 fixed to an insulating plate 5a having a substantially rectangular shape. Note that the detailed structure and switching operation of the disconnector 2 are well known, and the description thereof is omitted.

  Next, FIGS. 5A and 5B show the conventional structure of the mounting bracket 6 provided on each of the interphase insulating barrier 5A, the left side insulating barrier 5B, and the right side insulating barrier 5C. This mounting bracket 6 is an L-shaped sheet metal product having a length corresponding to the width of the base 1, and is secured to the side edge of the insulating plate 5a of the insulating barrier by rivets 8, and from both ends thereof U-shaped grooves 6 a-1 and 6 b-1 that are inserted into the fastening bolts 7 are formed in the screw seats 6 a and 6 b that project outward.

  Here, with respect to the interphase insulating barrier 5A and the left side insulating barrier 5B, as shown in FIG. 5A, the screw seats 6a and 6b of the mounting bracket 6 project to the right side of the insulating plate 5a. The U-shaped grooves 6a-1 and 6b- formed in 6b are formed in the same direction with their open ends facing downward. On the other hand, with respect to the right side insulating barrier 5C, the shape of the mounting bracket 6 is different from the mounting bracket 6 of FIG. 5A, and the screw seat 6a is fixed to the insulating plate 5a as shown in FIG. 5B. 6b projects to the left side of the insulating plate 5a, and the U-shaped grooves 6a-1 and 6b-1 formed in the screw seats 6a and 6b are the same with the opening end of the groove facing down as in FIG. It is formed in the direction. In this way, the shape and direction of the mounting bracket 6 are changed depending on the arrangement position of the insulation barrier, as shown in FIG. 3, the insulation barriers arranged on both sides of the R, S, T phase disconnector 2 between them. This is because a required insulation interval is secured between 5A, 5B, and 5C.

  And in order to assemble each said insulation barrier 5A, 5B, 5C to the base 1 of a disconnector, the volt | bolt 7 is half-tightened to the bolt hole previously drilled in the front surface of the board | substrate 1 according to the attachment position of the insulation barrier. The U-shaped grooves 6a-1, 6b-1 of the mounting bracket 6 are fitted to the bolt 7 from above the base 1, and the insulating barriers 5A, 5B, 5C are brought into predetermined mounting positions. Hold and tighten the bolt 7 in this state.

  The above-mentioned insulation barrier is an optional product that is generally shipped by the manufacturer according to the user's specifications. However, some users may purchase additional insulation barriers after installing a product without an insulation barrier. It may be retrofitted later, or may be purchased and retrofitted to replace an insulation barrier that has been damaged during use.

  As described above, the power switchgear equipped with the three-pole switch (disconnector 2) corresponding to the R, S, and T phase distribution paths on the base 1 includes an interphase insulating barrier 5A and a left side insulating barrier 5B. And a total of four insulation barriers comprising the right side insulation barrier 5C.

  By the way, in the insulation barrier having the conventional structure, the shape of the mounting bracket 6 and the mounting direction with respect to the insulating plate 5a are different between the interphase insulating barrier 5A, the left side insulating barrier 5B, and the right side insulating barrier 5C (FIG. 5 (a ), (B)), the manufacturer needs to prepare two types of insulation barriers as optional parts.

  This complicates the management of the insulation barrier components at the manufacturer. Further, even when the user places an additional order and attaches it later, there is a risk that the order of the parts and the mounting position may be wrong because the type and direction of the insulation barrier differ depending on the mounting position on the switchgear.

  The present invention has been made in view of the above points. The purpose of the present invention is to make the components of the interphase insulation barrier and the left and right side insulation barriers of the power switchgear common, and improve the insulation so that all of them can be handled by one type of insulation barrier. The object is to provide a barrier mounting structure.

In order to achieve the above object, according to the present invention, there is provided an insulating barrier mounting structure that is applied as an interphase insulating barrier and a side insulating barrier of a power switchgear in which a multipole switch is mounted side by side on a base. In this case, the insulating barrier is the one in which the mounting bracket fixed to the side edge of the insulating plate is bolted to the base and supported in an upright posture.
On the screw seat formed to project laterally from both ends in the longitudinal direction of the mounting bracket, U-shaped grooves to be inserted into the fastening bolts are formed so that the opening ends thereof face each other (Claim 1). When mounting to equipment, the insulation barrier applied to the interphase insulation barrier and the left and right side insulation barriers are aligned in the same direction and bolted to the base, and the insulation barrier applied to the other side insulation barrier is oriented. Is reversed 180 degrees and bolted to the base (claim 2).

  According to the above configuration, one type of insulating barrier can be applied as a common component to the interphase insulating barrier and the left and right side insulating barriers of the switchgear. This makes it easier for manufacturers to manage parts, and even when users purchase additional insulation barriers and install them later, they can use common parts without having to select the type of insulation barrier according to the mounting position as before. Therefore, it is possible to easily construct interphase insulation barriers and left and right side insulation barriers for switchgears.

BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram of the insulation barrier by the Example of this invention, Comprising: (a) is an external perspective view, (b), (c) is the attachment corresponding to an interphase insulation barrier, a left side insulation barrier, and a right side insulation barrier, respectively. It is an enlarged plan view of a metal fitting. It is a top view of the 3 pole type disconnector equipped with the insulation barrier of FIG. It is a top view of the 3 pole type disconnector equipped with the insulation barrier of the conventional structure. FIG. 4 is a side view of FIG. 3. 4A and 4B are enlarged plan views of mounting brackets corresponding to an interphase insulating barrier, a left side insulating barrier, and a right side insulating barrier, respectively.

  Hereinafter, an embodiment of the present invention will be described based on the examples shown in FIGS. 1 and 2, taking an insulating barrier provided in a three-pole disconnector as an example. In the drawings of the embodiment, members corresponding to those in FIG. 3 and FIG.

  That is, the interphase insulating barrier 5A and the left and right side insulating barriers 5B and 5C arranged on the front surface of the base 1 on which the disconnectors 2 for R, S, and T phases are arranged side by side are shown in FIG. The insulating barrier 5 is used as a common component and is erected at a predetermined position of the base 1 through its mounting bracket 6 and bolt 7 (see FIG. 2). Here, the mounting bracket 6 is fixed to the center position of the side edge along the longitudinal direction of the insulating plate 5a having a rectangular shape, and the U-shape formed on the screw seats 6a and 6b projecting laterally from both ends of the mounting bracket 6. The grooves 6-1 and 6b-1 are formed in such a direction that the open ends of the U-shaped grooves 6-1 and 6b-1 face each other, unlike the conventional mounting bracket shown in FIG. (See (b) and (c)).

  In order to attach the interphase insulating barrier 5A and the left and right side surface insulating barriers 5B and 5C to the base 1 of the disconnector shown in FIG. 2, the insulating barrier 5 which is a common component is screw seat 6a as shown in FIG. , 6b are bolted to the specified positions of the interphase insulating barrier 5A and the left side insulating barrier 5B in such a direction as to protrude to the right side of the insulating plate 5a, and the right side insulating barrier 5C is as shown in FIG. The insulation barrier 5 is inverted 180 degrees, and is bolted to the designated position of the right side insulation barrier 5C in such a direction that the screw seats 6a and 6b protrude to the left side of the insulation plate 5a.

  As a work procedure for fastening the insulation barrier 5 with the bolt, the bolt 7 is screwed into a half-tightened state in advance in a bolt hole on the upper row that has been drilled in the base 1 in advance. The U-shaped groove of the screw seat on the upper end side is inserted and held suspended, and then the bolt 7 is screwed into the bolt hole on the lower row side of the base 1 through the U-shaped groove of the screw seat on the lower end side and fastened. .

  As apparent from the above description, in the illustrated embodiment, the insulating barrier 5 shown in FIG. 1A is used as a common component, and the interphase insulating barrier 5A and the left and right side insulating barriers 5B and 5C shown in FIG. 2 are constructed. be able to.

DESCRIPTION OF SYMBOLS 1 Base 2 Disconnector 5 Insulation barrier 5A Interphase insulation barrier 5B Left side insulation barrier 5C Right side insulation barrier 5a Insulation plate 6 Mounting bracket 6a, 6b Screw seat 6a-1, 6b-1 U-shaped groove 7 Bolt

Claims (2)

Insulation barrier mounting structure that is used as an interphase insulation barrier and side insulation barrier for power switchgear with multiple pole switches mounted side by side on the base. The insulation barrier is fixed to the side edge of the insulation plate. In what supported the upright posture by fastening the bracket to the base,
For the power switchgear characterized in that a U-shaped groove to be inserted into the fastening bolt is formed in a direction in which the opening ends face each other on the screw seat formed to project laterally from both longitudinal ends of the mounting bracket. Insulation barrier mounting structure.   2. The insulating barrier mounting structure according to claim 1, wherein the insulating barrier applied to the interphase insulating barrier and the left and right side insulating barriers are bolted to the base in the same direction and applied to the other side insulating barrier. Insulating barrier mounting structure for power switchgear, wherein the insulating barrier is inverted 180 degrees and bolted to the base.