JPH0669248B2 - Insulating support - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to an insulating support used for a fixed frame for accommodating a circuit breaker of a drawer type circuit breaker, for example.

[Conventional technology]

Fig. 6 is a front view (Fig. 6 (a)) and a side view (Fig. 6 (b)) of a conventional breaker housing fixed frame using an insulator, in which Fig. 1 (1) is a breaker. Fixed frame for storage, (2) fixed frame
(1) Insulator insulator fixed to the insulator support (1d) with bolts,
(3) is the upper main circuit terminal bolted to this insulator (2), (4) is the lower main circuit terminal, and (5) is the drawer housed in this circuit breaker housing fixed frame (1). The main body of the circuit breaker, (6) is the main circuit contactor provided at the tip of the terminal of this circuit breaker.
In the figure, (1a) is the bottom plate of the fixed frame (1), (1b) is the rail welded to the bottom plate (1a), (1c) is the side plate welded to the rail (1b), (1d).
Is an insulator support welded to the side plate.

Next, the structure of the blocking and storing fixed frame will be described. FIG. 6 is manufactured as a general type using an insulator for the insulation of the main circuit terminals. This type of fixed frame consists of bottom plate (1a), rail (1b), side plate (1c), insulator support.
(1d) is welded and integrated, and the insulator support (2) is vertically fixed by bolts to the insulator support (1d) of this fixing frame. The main circuit contactor (6) is attached to the terminal tip of the breaker body (5).
By inserting the circuit breaker (5) into the fixed frame (1), the main circuit contactor (6) is connected to the main circuit terminal (3) of the fixed frame.
Connected with (4). This fixed frame is stored in a switchboard etc.,
The main circuit terminals (3) and (4) of the fixed frame are connected to conductors on the switchboard side or power cables.

[Problems to be solved by the invention]

In the conventional insulating support, each phase and each pole are individually configured by the insulator, so that the number of parts is large and the dimensional adjustment between the terminals is required.

The present invention has been made to solve the above problems, and an object of the present invention is to obtain an insulating support capable of reducing the number of parts by using a three-phase integrated insulating support, improving the assemblability, and reducing the cost. And

[Means for solving problems]

The insulating support according to the present invention uses a three-phase integrated insulating support, a conductor supporting portion is provided on the insulating support, and ridges are provided between the phases and between the ground so that the beam shape of the insulating support is H-shaped. It is what

[Action]

The insulating support according to the present invention has a sufficient H shape of the beam and an insulating creepage distance between the phases and the ground due to the insulating folds. In addition, since the beam has an H shape, it has sufficient mechanical strength and the material can be reduced.

Example of Invention

An embodiment of the present invention will be described below with reference to the drawings. First
FIG. 1 is a front view (FIG. 1 (a)) and a side view (FIG. 1 (b)) of a breaker housing fixed frame using an insulating support according to the present invention, and (1) is a breaker housing fixing Frame, (7) is the side plate (1
three-phase integrated insulation support bolted to c), (3),
(4) is the upper and lower main circuit terminals that are bolted to this insulation support, (5) is the breaker body housed in the fixing frame (1), and (6) is the breaker (5). This is the main circuit contactor installed at the tip of the terminal. In the figure (1a) is the bottom plate of the fixed frame (1), (1b)
Is welded to the bottom plate (1a) by rails. Fig. 2 is a detailed view of the mounting part of the insulation support (7), (3) is the upper main circuit terminal, (7)
Is an insulating support, (8a) is an insulating support (7), and is a side plate (1c) of the fixed frame (1).
Bolts, (8b) are bolts that fasten the upper main circuit terminal (3) to the insulation support (7), and (9) is terminals (3) (4).
It is a nut that fixes the bolt with a bolt (8b). Fig. 3 is a front view of this insulation support. In the figure, (7a) is the end face of the insulation support attached to the side plate (1c) of the fixed frame, (7b) is the main circuit terminal (3),
(4) is a through-end hole, that is, a conductor support portion, (7c) is a beam of an insulating support, (7e) is a central bone of an H-shaped cross-section beam, (7d) is an insulating fold that increases the creepage distance between the phase and the ground. Indicates. Fourth
FIG. 5 is a cross-sectional view of the insulating support taken along the line AA of FIG. 3 as seen from above, and FIG. 5 is a cross-sectional view taken along the line BB of FIG. 3 seen from the side.

Next, an embodiment of the present invention will be described. The structure of the fixed frame is shown in Fig. 1, and the bottom plate (1a) and the rail (1b) are welded together, the side plate (1c) that can be fixed to the rail (1b) with a bolt, and the side plate. Three-phase integrated insulation support (7) that can be fixed with bolts, and terminals (3), (4) that can be fixed to the insulation support (7) by bolts (8b) through the insulation support (7). ). And this insulation support (7) needs to ensure the reliable insulation between the earth and the phase, and the circuit breaker (5)
It is required to have sufficient strength to withstand insertion force during insertion, vibrations and shocks during circuit breaker opening and closing operations, and strong electromagnetic force during short-circuit current application. Therefore, the shape of the insulating support (7) is set as shown in FIGS. Basically insulation support
The beam (7c) of (7) has an H shape as shown in the cross-sectional view of FIG. 5 to ensure mechanical strength, and for the insulation creepage distance between the phases and the earth, a concave portion at the center of the H shape The main circuit terminals have been placed in such a position that effectively works (that is, the creepage insulation distance can be increased). Therefore, as for the insulation creepage distance, as shown in Fig. 4, the insulation creepage distance to ground: EL
Alternatively, a sufficient distance can be set for each inter-phase insulating creepage distance PL.

In the above embodiment, the main circuit terminal through hole (7b), that is, the conductor supporting portion is provided, and the main circuit terminals (3) and (4) are fixed to the insulating support (7) with bolts (8b). Main circuit terminals (3) (4)
It may be a one-piece molding or one-piece casting product, in which is embedded in the insulating support (7).

Further, in the above-mentioned embodiment, the example applied to the storage frame of the circuit breaker has been shown, but the present invention is not limited to this, and even if it is used for supporting a bus bar arranged in a switchboard, for example, it is equivalent to the above-mentioned embodiment. Produce an effect.

〔The invention's effect〕

As described above, according to the present invention, since the beam of the insulating support is H-shaped, it is possible to secure a sufficient insulating creepage distance in combination with the insulating folds. There is an effect that can be made cheap.

[Brief description of drawings]

FIG. 1 is a front view (FIG. 1 (a)), a side view (FIG. 1 (b)), and a second view showing a circuit breaker housing fixed frame according to an embodiment of the present invention.
FIG. 4 is a detailed view of the insulating support mounting portion of the present invention, FIG. 3 is a front view of the insulating support of the present invention, and FIG. 4 is a cross section AA of FIG.
Fig. 5 (a) is a sectional view taken along the line BB of Fig. 3, Fig. 5 (b) is a sectional view taken along the line CC of Fig. 3, and Fig. 6 is a general type using a conventional insulator. Front view showing a fixed frame for storing the circuit breaker (6th
It is a figure (a) and a side view (FIG. 6 (b)). In the figure, (3) is an upper main circuit terminal, (4) is a lower main circuit terminal, (7) is an insulating support, (7a) is a mounting portion, (7b) is a through hole,
(7c) is the beam, (7d) is the fold, and (7e) is the central bone of the beam. The same reference numerals in the drawings indicate the same or corresponding parts.

Claims (3)

[Claims] 1. At least two units arranged at a predetermined interval.
In an insulating support for collectively supporting a plurality of conductors, the insulating support comprises a beam having an H-shaped cross section and mounting portions at both ends thereof, and the beam is provided with support portions for the conductor at predetermined intervals. A plurality of folds are provided between the support portions of the conductor and between the support portion of the conductor and the mounting portion, the folds being orthogonal to the longitudinal direction of the beam and projecting over the entire circumference of the beam. An insulating support. 2. The insulating support according to claim 1, wherein the outer shape of the fold is substantially rectangular. 3. The insulating support according to claim 1, wherein the mounting portions at both ends are mounted on the side plates of the fixed plate.