JPH0711812U - Lightning arrester for distribution board - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a lightning arrester for a distribution board that can be installed in the distribution board without providing a board separately from the distribution board and using a screw. [Structure] Board 16 having lightning arrester 11, input-side terminal fitting 3 and ground-side terminal fitting 4 attached at predetermined mounting positions, and board 16
And a bottom case 1 in which a mounting seat 5 for accommodating the input side terminal fitting 3 and the ground side terminal fitting 4 is attached.
And a case lid 2 formed to have a width narrower than a space between the input side terminal fitting 3 and the mounting seat 5 of the ground side terminal fitting 4, and the input side terminal fitting 3 and the ground side terminal of the bottom case 1. While a mounting claw hole 6 having a predetermined shape is formed on the lower outer surface of the mounting seat 5 of the metal fitting 4, a display surface 9 having a predetermined shape is formed so as to project on the upper outer surface of the case lid 2, and the lightning arrester is provided on the display surface 9 H
The operation display lamp 10 is provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a lightning arrester for a distribution board, and more particularly to a lightning arrester for a distribution board for use with a collective type circuit breaker for a light distribution board (JIS C8370 Annex 5).

[0002]

[Prior art]

 The inside of the distribution board is formed so that a breaker of the size specified in JIS C8370 Annex 5 can be installed, and the inside bottom and the inside bottom installed inside the distribution board are attached to it. A connecting mounting plate is provided by projecting at the specified width dimension position.The connecting mounting plate is provided on the lower outer surface of the input side terminal and the grounding side terminal with mounting claw holes corresponding to the claws of the connecting mounting plate. A circuit breaker is removably attached, and an inner lid with an opening corresponding to the size of the switch of the circuit breaker is attached on the top surface of the circuit breaker. A lightning arrester is connected to either the input side or the output side of the circuit breaker.

There are various forms of the lightning arrester, in which the lightning arrester main body part and the external connection terminal part are integrally formed, or the lightning arrester main body part and the external connection terminal part are formed in a plug-in type. Some are only exchangeable. Then, a screw hole is formed on the outside of the case of the external connection terminal for mounting on a distribution board, and / or a rail specified by the DIN standard on the bottom of the case (hereinafter referred to as DIN rail). ) Is formed with a shallow groove having a predetermined size.

The above-mentioned lightning arrester is installed by using a screw screw hole in the inner bottom of the distribution board where the connecting mounting plate is attached so as to match the screw hole of the lightning arrester, and by using a screw screw. Install a lightning arrester board in parallel with the distribution board outside the switchboard, and drill a screw screw hole in the inner bottom of this board in the same manner as above and attach it with a screw screw, or use a DIN screw on the inner bottom of the board. A rail is provided, and this DIN rail is mounted by engaging and sandwiching the groove on the bottom surface of the case.

[0005]

[Problems to be solved by the device]

 Since the installation of the lightning arrester to the conventional distribution board is performed as described above, when attaching to the inner bottom of the distribution board with a screw screw, a screw screw hole must be drilled to match the screw hole of the arrester. In addition, each time you replace it, you must loosen the screw and replace it. It is also necessary to confirm that there is a lightning arrestor installation margin on the insole before installation. Also, when a panel for lightning arresters is installed side by side outside the distribution board, it is necessary to prepare the panel separately from the distribution board, and it is necessary to secure the mounting position of the panel. Not economical.

The present invention has been made in view of the above circumstances, and an object thereof is to install it in a distribution board without providing a board separately from the distribution board and without using a screw screw. It is to provide a lightning arrester for an electric panel.

[0007]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, a lightning arrester for a distribution board of the present invention is a board on which a lightning arrester, an input side terminal metal fitting and a ground side terminal metal fitting are attached at a predetermined mounting position, and an input side terminal which accommodates the board. It consists of a bottom case with a mounting seat for mounting the metal fittings and the ground-side terminal fitting, and a case lid that is narrower than the space between the mounting seats of the input-side terminal fitting and the ground-side terminal fitting. At the same time, a mounting hole with a predetermined shape is formed on the lower outer surface of the mounting seat of the input side terminal fitting and the ground side terminal fitting of the bottom case, while a display surface with a predetermined shape is formed on the upper and outer surfaces of the case lid. It is formed by projecting, and the operation display lamp of the arrester is provided on the display surface.

[0008]

[Action]

 In the above configuration, the lightning arrester is formed so that its external shape and size are almost the same as the circuit breaker specified in JIS C8370 Annex 5, and the mounting case for the input side terminal fitting and the ground side terminal fitting of the bottom case It is possible to install by mounting the tab for the lightning arrester separately from the distribution board, by engaging the claw of the connecting mounting plate arranged in the distribution board with the mounting claw hole formed on the lower outer surface of the Instead, it can be installed together with the circuit breaker on the connecting plate. In addition, screw screws for mounting to the panel are not required, and mounting is extremely easy, and at the same time, if the lightning arrester is damaged, it can be replaced easily. In addition, since the display surface of the operation display lamp of the lightning arrester is aligned with the opening / closing switch of the circuit breaker in the opening of the inner lid, the inside of the distribution board can be neatly arranged.

[0009]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. 1 is a top view of a lightning arrester for a distribution board showing an example of the present invention, FIG. 2 is a right side view of FIG. 1, FIG. 3 is a left side view of FIG. 1, and FIG. 4 is a front view of FIG. In the figure, 1 is a bottom case, 2 is a case lid, 3 is an input side terminal fitting, and 4 is a grounding side terminal fitting.

The bottom case 1 is formed in a rectangular container, and mounting seats 5 for mounting terminal fittings (input side terminal fitting 3 and ground side terminal fitting 4) are provided on the left and right edges of the container, respectively. Three mounting holes 6 are formed at predetermined intervals, and a mounting claw hole 6 having a predetermined shape is formed under each mounting seat 5.

The case lid 2 has a main body 7 formed in an inverted shape of a rectangular container, and the width in the left-right direction is such that the input side terminal fitting 3 and the ground side terminal fitting 4 of the bottom case 1 are attached. The width of the seat 5 is narrower than that of the seat 5, and a protrusion 8 is formed on the outer surface in the left-right direction for partitioning the mounting seat 5 to prevent interference between adjacent terminals. A display surface 9 having a predetermined shape is formed so as to project on the upper and outer surfaces of the main body portion 7, and an operation display lamp 10 of the lightning arrester H is provided on the display surface 9.

As shown in FIG. 5, the input-side terminal fitting 3 and the ground-side terminal fitting 4 are provided on a board 16 on which a Z-trap (lightning protection element) 11, a fuse 12, a thermal fuse 13, a resistor 14, and a diode 15 are mounted. The board 16 is mounted at each mounting position, and when the board 16 is housed in the bottom case 1, it is mounted on the bottom case 1 by being screwed to the mounting seat 5 with a screw screw.

In the lightning arrester H having the above configuration, the dimension a between the left and right outer side surfaces where the mounting claw holes 6 of the bottom case 1 are formed, and the dimension b between the outer bottom surface of the bottom case 1 and the top surface of the case lid 2. The width c of the display surface 8 in the left-right direction is set to the dimension specified in JIS C8370 Annex 5.

FIG. 6 is a cross-sectional view of the distribution board when the lightning arrester H having the above-described structure is attached to the distribution board. The connecting mounting plate 19 is provided on the inner bottom 18 of the box 17 of the distribution board. The circuit breakers 20 are mounted on one row of the connecting mounting plate 19, and the arrester H having the above-mentioned structure is mounted on the other row. An inner lid 21 having an opening of a size suitable for the open / close switch section and the display surface 9 is attached. In this way, the lightning arrester H of the present invention can be attached by engaging the pawl 22 of the connecting mounting plate 19 arranged in the distribution board with the pawl hole 6 for mounting of the bottom case 1, and the distribution It is possible to install it together with the circuit breaker on the connecting mounting plate 19 without providing a board for the arrester separately from the board. Further, since the display surface 9 of the operation display lamp portion of the lightning arrester H is aligned with the opening / closing switch portion of the circuit breaker 20 in the opening of the inner lid 21, the inside of the distribution board can be neatly arranged.

In the above embodiment, as shown in FIG. 4, a groove 23 is formed on the outer bottom surface of the bottom case 1 in accordance with a DIN rail (not shown) so that it can be moved back and forth when it is attached to and detached from the DIN rail. Although the example in which the pawl 24 is provided is shown, this configuration may be omitted. Further, although an example is shown in which the outer surface of the projecting portion 8 of the case lid 2 is formed flat, a groove may be formed in the center of the outer surface for vertically increasing the creepage distance between the terminals. .

[0016]

[Effect of device]

 As described above, the lightning arrester for the distribution board according to the present invention can be mounted by engaging the claws of the connecting mounting plate arranged in the distribution board with the mounting claw holes of the bottom case. , It is possible to install the lightning arrester board separately from the distribution board and install it together with the circuit breaker on the connecting mounting plate. In addition, screw screws for mounting to the panel are not required, and mounting is extremely easy, and at the same time, if the lightning arrester is damaged, it can be replaced easily. In addition, since the display surface of the operation display lamp of the lightning arrester is aligned with the opening / closing switch of the circuit breaker in the opening of the inner lid, the inside of the distribution board can be neatly arranged.

[Brief description of drawings]

FIG. 1 is a top view of a lightning arrester for a distribution board showing an example of the present invention.

FIG. 2 is a right side view of FIG.

FIG. 3 is a left side view of FIG.

FIG. 4 is a front view of FIG.

5A and 5B are explanatory views of a board of a lightning arrester according to the present invention, in which a is a front view and b is a view taken along line X-X of a.

FIG. 6 is a view showing a state in which the lightning arrester according to the present invention is mounted on a distribution board.

[Explanation of symbols]

1: Bottom case 2: Case lid
3: Input side terminal fitting 4: Ground side terminal fitting 5: Mounting seat
6: Pawl hole for mounting 7: Main body 8: Projection
9: Display surface 10: Operation display lamp 16: Board 1
7: Distribution board box 18: Insole 19: Connection mounting plate 2
1: Inner lid 22: Claw H: Lightning arrester

Claims (1)

[Scope of utility model registration request] 1. A board having a lightning arrester, an input-side terminal fitting, and a ground-side terminal fitting mounted at predetermined mounting positions, and a mounting seat for housing the board and for mounting the input-side terminal fitting and the ground-side terminal fitting. And a bottom case, and a case lid formed with a width narrower than the space between the mounting seats of the input-side terminal fitting and the ground-side terminal fitting.The bottom case also mounts the input-side terminal fitting and the ground-side terminal fitting. While a mounting pawl hole of a predetermined shape is formed on the lower outer surface of the seat, a display surface of a predetermined shape is formed to project on the upper and outer surfaces of the case lid, and the operation display lamp of the arrester is provided on the display surface. Characteristic lightning arrester for distribution board.