Lightning protection device storage case

Abstract

To provide a lightning protection device storage case which facilitates the handling of the lightning protection device.SOLUTION: A lightning protection device storage case 1 for housing a lightning protection device 10 according to the invention has: a lightning protection insulator 11 formed of an insulating rubber material with a built-in lightning protection element; a pair of terminal metal fittings 12a, 12b connected to the lightning protection element and exposed from the lightning protection insulator 11; and a pair of connecting metal fittings 13, 14 attached to the pair of terminal metal fittings 12a, 12b and attached to a steel tower and connected to a supporting insulator for supporting a power transmission line, wherein a lower case 2 and an upper case 3 are provided for housing the lightning protection device 10 while exposing the pair of connection metal fittings 13 and 14 by pinching and fixing a part of the pair of connection metal fittings 13, 14 in a recess in the plate, and wherein the lower case 2 and the upper case 3 are configured not to come into contact with the lightning protection insulator 11.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present invention relates to a storage case for a lightning arrester. [Background technology]

[0002] In recent years, a temporary construction method (cable jumper method) has been implemented in which the transmission lines near the tower are bypassed with an insulated jumper wire, making it possible to carry out work such as tower replacement safely (uninterrupted work) even when the power is on.

[0003] When performing uninterruptible power outage construction using this cable jumper method, a lightning arrester is used to prevent the cable jumper from being damaged by high voltage caused by a lightning surge when lightning strikes, and to prevent the high voltage from being transmitted to the power transmission line (see, for example, Patent Document 1).

[0004] The lightning arrester described in Patent Document 1 includes a lightning insulator connected to a support insulator that supports a power transmission line via a mounting bracket, and a power-transmission-side arcing horn. The lightning insulator is a lightning arrester element made of zinc oxide with nonlinear resistance characteristics molded in silicone rubber. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2004-303624 A Summary of the Invention [Problem to be solved by the invention]

[0006] The silicone rubber that makes up lightning insulators is very soft, and requires careful handling and storage (for example, taking care not to apply force to the silicone rubber, and taking care to protect it from dirt, scratches, dust, etc.).

[0007] Since lightning arresters are used in the cable jumper method, they are transported to the construction site, attached to the insulator string (support insulator) on the tower, and after the required period of use, removed from the insulator string, transported, and stored in a warehouse, but they are delivered in wooden boxes or cardboard boxes. Since wooden boxes and cardboard boxes are not designed for use in the cable jumper method, they cannot be stored again after being opened, and if they are transported in cardboard boxes and exposed to rain, they become unusable.

[0008] For this reason, after use, the lightning arresters are cleaned (removing dirt and salt with a cloth, etc.), the metal parts are placed on a wooden stand (pillow), and covered with a vinyl bag or a polythene bag to protect them from dust, etc., and then stored. This storage method requires a large storage space, and if the metal parts of the lightning arresters come off the wooden stand, there is a possibility that the silicone rubber may be deformed or damaged. In addition, since the same problem occurs when transporting them from the warehouse to the site, great care is taken to prevent damage to the silicone rubber. Furthermore, at the construction site, the lightning arresters need to be lifted to a high place, but since there are no suitable hanging tools or alternative hanging holes, workers take great care and slowly lift the lightning arresters to a high place by hand, and then carefully attach them to the insulator strings.

[0009] Therefore, an object of the present invention is to provide a storage case for a lightning arrester that allows easy handling of the lightning arrester. [Means for solving the problem]

[0010] [1] A lightning insulator having a built-in lightning protection element and made of an insulating rubber material; A pair of terminal fittings connected to the lightning protection element and exposed from the lightning protection insulator; A lightning arrester storage case for storing a lightning arrester having a pair of connecting fittings attached to the pair of terminal fittings and connected to a support insulator attached to a steel tower and supporting a power transmission line, a housing that houses the lightning arrester while exposing the pair of connecting fittings by sandwiching and fixing a portion of the pair of connecting fittings in a recess of a plate; The housing is configured so that the lightning insulator does not come into contact with the housing. [2] The lightning protection device storage case described in [1] above, wherein the housing has a plurality of hanging devices attached to its outer surface for suspending the lightning protection device storage case. [3] The lightning protection device storage case according to [2], wherein the housing is openable and closable. [4] The lightning arrester storage case described in [3] above, wherein the housing has a cylindrical shape overall and includes semi-cylindrical lower and upper cases with both longitudinal ends closed, and further includes hinges that support the lower and upper cases so that they can be opened and closed, and a locking device that secures the lower and upper cases in a closed position. [5] The lightning protection device storage case described in [4] above, wherein when the lightning protection device storage case containing the lightning protection device is hung using the hanging device, the hinge is positioned at the upper side and the locking device is positioned at the lower side. Effect of the Invention

[0011] According to the invention as defined in claim 1, the lightning arrester can be easily handled. According to the invention as set forth in claim 2, the work of installing the lightning arrester on the support insulator can be performed in a state in which the lightning arrester storage case housing the lightning arrester is suspended. According to the invention as defined in claim 3, the lightning protection insulator can be protected until the installation work of the lightning protection device on the support insulator is completed. According to the invention as defined in claim 4, the housing can be manufactured using commercially available pipes. According to the invention as defined in claim 5, after the lightning arrester is installed on the supporting insulator, the lightning arrester storage case can be easily removed from the lightning arrester. [Brief description of the drawings]

[0012] [Figure 1]FIG. 1 is a front view showing a storage state of a lightning arrester storage case according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a plan view of the lightning arrester storage case shown in FIG. [Diagram 3] FIG. 3 is a rear view of the lightning arrester storage case shown in FIG. [Figure 4] FIG. 4 is a left side view of the lightning arrester storage case shown in FIG. [Diagram 5] FIG. 5 is a right side view of the lightning arrester storage case shown in FIG. [Figure 6] FIG. 6 is a plan view showing a state in which the upper case of the lightning arrester storage case in which the lightning arrester is stored is open. [Figure 7] FIG. 7 is a diagram for explaining the installation work of the lightning arrester. [Figure 8] 8(a) to (d) are photographs showing an example of the details of the installation work of a lightning arrester. [Figure 9] 9(a) to (e) are photographs showing an example of the details of the removal work of a lightning arrester. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In each drawing, components having substantially the same functions are designated by the same reference numerals, and duplicated explanations will be omitted.

[0014] [Embodiment Mode] Figures 1 to 5 show the storage state of a lightning arrester storage case in accordance with an embodiment of the present invention, with Figure 1 being a front view, Figure 2 being a plan view, Figure 3 being a rear view, Figure 4 being a left side view, and Figure 5 being a right side view.

[0015] The lightning protection device storage case 1 (hereinafter also simply referred to as "storage case 1") includes a lower case 2, an upper case 3, a plurality of (e.g., two) hinges 4 that support the lower case 2 and the upper case 3 so as to be openable and closable, a plurality of (e.g., two) locking devices 5 called catch clips or snap locks that fix the lower case 2 and the upper case 3 in a closed state, and a plurality of (e.g., eight) hanging devices such as eye bolts 6a1, 6a2, 6b, 6c, 6d, 6e, 6x1, 6x2 (hereinafter also referred to as "hanging devices 6" when these are collectively referred to) that are attached to the outer surfaces of the lower case 2 and the upper case 3 and can hang the lightning protection device 10 in a state where it is stored in the lightning protection device storage case 1. The number of hanging devices 6 is not limited to eight. The lower case 2 and the upper case 3 are an example of a housing.

[0016] The lower case 2 and the upper case 3 house the lightning arrester 10 so that the lightning insulator 11 (see FIG. 6), which will be described later, does not come into contact with the lower case 2 and the upper case 3. Specifically, the center line 11c (see FIG. 6) along the longitudinal direction of the lightning insulator 11 (hereinafter referred to as the lightning insulator center line) is aligned with the center line 1a (see FIG. 2) along the longitudinal direction of the lower case 2 and the upper case 3. This makes it possible to suppress damage to the lightning insulator 11.

[0017] The lower case 2 and the upper case 3 can be opened and closed by means of a hinge 4. This makes it possible to protect the lightning protection insulator 11 until the installation work of the lightning protection device 10 on the support insulator 110 (see FIG. 7) is completed.

[0018] The lower case 2 and the upper case 3 are generally tubular (e.g., cylindrical) and have semi-tubular (e.g., semi-cylindrical) shapes with both ends in the longitudinal direction closed. This allows the lower case 2 and the upper case 3 to be manufactured inexpensively using commercially available pipes. The specific structures of the lower case 2 and the upper case 3 will be described later.

[0019] The multiple hanging devices 6 are attached to the lower case 2 and the upper case 3 so that, for example, when the lightning arrester storage case 1 housing the lightning arrester 10 is hung using the hanging devices 6, the inclination direction of the lightning arrester storage case 1 faces the same as the inclination direction when the lightning arrester 10 is attached to an overhead power transmission line, as shown in Fig. 7 described later. This allows the installation work of the lightning arrester 10 on the support insulator 110 to be performed without changing the inclination direction of the suspended lightning arrester storage case 1.

[0020] The position and hanging method of the suspending device 6 may be determined so that the inclination angle when the lightning arrester storage case 1 is suspended is approximately the same as the inclination angle θb (for example, the difference from the inclination angle θa is 15° or less, or 10° or less) as the inclination angle θa when the lightning arrester 10 is attached to the overhead power transmission line (for example, about 28° when the support insulator 110 is horizontal). Specifically, as shown in Fig. 1, two suspending devices 6a1 and 6a2 are provided near the hinge 4 of the lower case 2, three suspending devices 6b, 6x1 and 6c are provided along the axial direction at the top of the upper case 3, and three suspending devices 6d, 6x2 and 6e are provided along the axial direction at the bottom of the lower case 2. As shown in Fig. 2, the center of gravity of the lightning arrester storage case 1 in the stored state is located approximately at the case center 1b (the center in the longitudinal and radial directions), and therefore, as shown in Fig. 1, suspenders 6x1 and 6x2 are provided at positions corresponding to the case center 1b, and suspenders 6a1, 6a2, 6b, 6c, 6d, and 6e are provided at positions equidistant L from the case center 1b in the axial direction. This makes it possible to hoist the lightning arrester 10 while it is stored in the lightning arrester storage case 1, attach the lightning arrester 10 to the supporting insulator 110, and then remove the lightning arrester storage case 1 from the lightning arrester 10, facilitating the installation work of the lightning arrester 10.

[0021] The lower case 2 comprises a semi-cylindrical lower case body 21, a front plate 22 that covers one longitudinal end of the lower case body 21, and a rear plate 23 that covers the other longitudinal end of the lower case body 21, and the lower case body 21, the front plate 22 and the rear plate 23 are joined to each other by adhesive, welding, etc.

[0022] The upper case 3 comprises a semi-cylindrical upper case body 31, a front plate 32 that covers one longitudinal end of the upper case body 31, and a rear plate 33 that covers the other longitudinal end of the upper case body 31, and the upper case body 31, the front plate 32 and the rear plate 33 are joined to each other by adhesive, welding, etc.

[0023] The lower case body 21 and the upper case body 31 may be manufactured by processing, for example, a hard polyvinyl chloride pipe (JIS K 6741) VU pipe having an outer diameter of 216 mm and an inner diameter of 202 mm. The front plates 22, 32 and the rear plates 23, 33 may be made of, for example, a polyvinyl chloride plate having a thickness of 30 mm.

[0024] 4 and 6, in order to position and dispose the coordinate adjustment fitting 14 and the terminal fitting 12b constituting the lightning arrester 10 relative to the lightning arrester storage case 1, a recess 22a is formed in the front plate 22 of the lower case 2. Also, in order to position and dispose the terminal fitting 12a constituting the lightning arrester 10 relative to the lightning arrester storage case 1, a recess 23a is formed in the rear plate 23 of the lower case 2. Also, in order to position and dispose the support fitting 13 constituting the lightning arrester 10 relative to the lightning arrester storage case 1, a recess 21a is formed in the lower case main body 21 of the lower case 2, and a recess 23b is formed in the rear plate 23 of the lower case 2.

[0025] The coordinate adjustment fitting 14 (see Fig. 6) is exposed horizontally from the front plates 22, 32 of the lightning arrester storage case 1, and the support fitting 13 (see Fig. 6) is exposed horizontally from the rear plates 23, 33. The position at which the coordinate adjustment fitting 14 is exposed is slightly above the case center line 1a, as shown in Figs. 3 and 4. The support fitting 13 and the coordinate adjustment fitting 14 are an example of a pair of connecting fittings.

[0026] (Configuration of lightning protection device) 6 is a plan view showing a state in which the upper case 3 of the lightning arrester storage case 1 storing the lightning arrester 10 is open. The lightning arrester 10 shown in the figure is for a transmission voltage of 66 kV.

[0027] The lightning protection device 10 comprises a lightning protection insulator 11 incorporating a lightning protection element (not shown), a pair of terminal fittings 12a, 12b connected to the lightning protection element and exposed from the lightning protection insulator 11, a support fitting 13 attached to one of the terminal fittings 12a, and a coordinate adjustment fitting 14 attached to the other terminal fitting 12b.

[0028] The support bracket 13 is formed with a hole 13a for attachment to a connecting bracket 120a of the tower side mounting bracket 120 or a connecting bracket 130a of the electric wire side mounting bracket 130.

[0029] The coordinate adjustment fitting 14 has a long hole 14a formed therein for adjusting the relative position between a pair of lightning arresters 10 shown in FIG. 7, which will be described later, and for attaching the flat braided wire 17.

[0030] The lightning insulator 11 has large-diameter cap portions 11a and small-diameter cap portions 11b arranged alternately in the axial direction, and is made of an insulating rubber material such as silicone rubber. The lightning insulator 11 has an outer diameter of, for example, about 150 mm.

[0031] As described above, the lightning arrester 10 is stored in the lightning arrester storage case 1 so that the lightning insulator center line 11c of the lightning arrester 11 coincides with the case center line 1a of the lower case 2 and the upper case 3. The outer diameter of the lightning arrester 11 is approximately 148 mm, and the inner diameter of the lightning arrester storage case 1 is 202 mm, so a gap of 27 mm is provided.

[0032] In the case of a transmission voltage of 154 kV, the lightning insulator 11 becomes longer and the lightning arrester storage case 1 becomes longer accordingly, so that the lightning insulator 11 may be supported near the middle in the longitudinal direction from the inner surface of the lower case 2 by an elastic member such as sponge. Also, for lightning insulators 11 for a transmission voltage of 66 kV, the lightning insulator 11 may be supported near the middle in the longitudinal direction from the inner surface of the lower case 2 by an elastic member such as sponge.

[0033] (Outline of lightning protection device installation work) Next, an overview of the installation work of the lightning arrester 10 on the support insulator 110 will be described with reference to Fig. 7. Details of the installation work of the lightning arrester 10 on the support insulator 110 and details of the removal work of the lightning arrester 10 from the support insulator 110 will be described later. Fig. 7 shows only the overhead transmission lines on one side of the tower, but overhead transmission lines are arranged symmetrically on both sides of the tower with respect to the center line of the tower.

[0034] Of the overhead transmission line shown in the figure, the support insulator 110, the tower-side mounting bracket 120, the electric wire-side mounting bracket 130, and the overhead transmission line 140 are existing components, and the other components are newly installed components. One end of the support insulator 110 is attached to the tower via the tower-side mounting bracket 120, and the other end of the support insulator 110 is attached to the overhead transmission line 140 via the electric wire-side mounting bracket 130.

[0035] A jumper unit (also called a cable jumper) 100 is provided, which is arranged on either side of the tower and electrically connects between the overhead transmission lines 140 supported in a tightened state by the support insulator 110, the tower side mounting bracket 120, and the electric wire side mounting bracket 130.

[0036] In the jumper unit 100, a jumper wire 104a is connected to one side of a cable head 101, and a jumper wire 104b is connected to the other side of the cable head 101 via a terminal adapter 102. The terminal adapter 102 is hoisted up to a connection fitting 130b of a wire-side mounting fitting 130 by a turnbuckle 103.

[0037] The connecting fittings 120a, 130a at both ends of the support insulator 110 are connected by a pair of lightning arrester devices 10 and a flat braided wire 17 that connects the pair of lightning arrester devices 10. The pair of lightning arrester devices 10 have support fittings 13 connected to the connecting fittings 120a, 130a, respectively, and are connected to coordinate adjustment fittings 14 via the flat braided wire 17.

[0038] When attaching the lightning arrester 10 to the support insulator 110, ropes 15 are passed through each of the multiple hanging devices 6 (e.g., hanging devices 6a1, 6a2) of the lightning arrester storage case 1 housing the lightning arrester 10, and the lightning arrester storage case 1 is hung with a metal wheel from an appropriate position on the tower, and the ropes 15 are held by hooks 16a provided at the ends of the support ropes 16, and the support ropes 16 are moved using the metal wheel to suspend the lightning arrester storage case 1. At this time, the inclination angle θb of the lightning arrester storage case 1 is approximately the same as the inclination angle θa of the lightning arrester 10 when the lightning arrester 10 is attached to the support insulator 110, so that the installation work of the lightning arrester 10 on the support insulator 110 can be easily performed. Although rope 15 is passed through suspending devices 6a1 and 6a2 in FIG. 7, it may be passed through other suspending devices (for example, suspending devices 6b, 6c, 6d, and 6e) as shown in FIG. 8 described later.

[0039] With the lightning arrester storage case 1 suspended by the iron wheels, the support bracket 13 of the left lightning arrester 10 shown in Fig. 7 is attached to the connecting bracket 130a of the electric wire-side mounting bracket 130. Similarly, the support bracket 13 of the right lightning arrester 10 shown in Fig. 7 is attached to the connecting bracket 120a of the tower-side mounting bracket 120. Thereafter, the coordinate adjustment brackets 14 of the left and right lightning arresters 10 are connected by a flat braided wire 17.

[0040] Next, the lightning arrester storage case 1 is removed from the lightning arrester 10, and the installation work of the lightning arrester 10 on the support insulator 110 is completed.

[0041] (Details of the lightning protection device installation work) An example of the details of the installation work of the lightning arrester 10 on the support insulator 110 will be described with reference to Fig. 8. In Fig. 8, 130a shows a simulated connection fitting having the same shape as an actual connection fitting. Although the figure shows the installation work of the lightning arrester 10 on the left side of Fig. 7, the installation work of the lightning arrester 10 on the right side is performed in the same manner.

[0042] First, as shown in Fig. 8(a), the storage case 1 housing the lightning arrester 10 is suspended using the suspenders 6b to 6e and two ropes 15. That is, one of the two ropes 15 is passed through the two suspenders 6b and 6e provided on one side in the axial direction, and the other of the two ropes 15 is passed through the two suspenders 6c and 6d provided on the other side in the axial direction. This makes it possible to easily adjust the inclination angle θb of the storage case 1 by adjusting the length of one rope 15 and the other rope 15, as shown in Fig. 8(b) described later.

[0043] 8(a), the suspenders 6x1 and 6x2 are fastened to the storage case 1 with rope 15 to prevent it from opening. After fastening with rope 15, the two fasteners 5 are removed in advance. Furthermore, to prevent the lightning arrester 10 from falling, the suspenders 6a1 and 6a2 are connected to the lightning arrester 10 with rope 15 until the installation work is completed.

[0044] Next, as shown in FIG. 8(b), the two ropes 15 suspending the storage case 1 are moved to suspend the storage case 1 to an installation position.

[0045] Next, as shown in FIG. 8(c), after fixing the support bracket 13 of the lightning arrester 10 to the connecting bracket 130a, the ropes 15 passed through the hanging devices 6x1 and 6x2 are removed, and the ropes 15 passed through the hanging devices 6a1 and 6a2 are removed.

[0046] 8(d), by suspending the storage case 1 using the suspenders 6b to 6e and the two ropes 15, the storage case 1 can be easily opened and removed from the lightning arrester 10. In this manner, the lightning arrester 10 is installed.

[0047] (Details of the lightning arrester removal work) An example of the details of the removal of the lightning arrester 10 from the support insulator 110 will be described with reference to Fig. 9. In Fig. 9, 130a shows a simulated connection fitting having the same shape as an actual connection fitting. Although the figure shows the removal of the lightning arrester 10 on the left side of Fig. 7, the removal of the lightning arrester 10 on the right side is performed in the same manner.

[0048] First, as shown in FIG. 9(a), an empty storage case 1 that does not house a lightning arrester 10 is suspended using the suspension tools 6a1, 6a2 and the rope 15.

[0049] Next, as shown in FIG. 9(b), the storage case 1 is suspended up to the position of the lightning arrester 10 using the suspenders 6a1, 6a2 and the rope 15.

[0050] Next, as shown in FIG. 9(c), the position of the support metal fitting 13 of the lightning arrester 10 is aligned with the position of the recess 21a of the storage case 1, and the position of the coordinate adjustment metal fitting 14 of the lightning arrester 10 is aligned with the position of the recess 22a of the storage case 1.

[0051] Next, as shown in FIG. 9(d), storage case 1 is closed while being suspended using hanging devices 6a1, 6a2 and rope 15.

[0052] Finally, as shown in Fig. 9(e), the lower case 2 and the upper case 3 are closed by fastening the fasteners 5, and the lightning arrester 10 is stored in the storage case 1. The support fittings 13 of the lightning arrester 10 are removed from the connecting fittings 130a, and the storage case 1 containing the lightning arrester 10 is suspended using the suspenders 6a1, 6a2 and the rope 15 and lowered to the ground. In this manner, the removal work of the lightning arrester 10 is completed.

[0053] (Operation of the embodiment) The lightning arrester storage case 1 according to the present embodiment provides the following advantages. (a) Since the metal portions at both ends of the lightning arrester 10 are held by the lightning arrester storage case 1, the lightning arrester insulator 11 does not come into contact with the housing and the entire lightning arrester insulator 11 is stored therein. This makes it possible to protect the lightning arrester insulator 11 from dirt and to store and transport the insulators by stacking them. (b) By attaching the suspender 6 to the housing, it is possible to attach the rope 15 when lifting it to a high place or when attaching or detaching it to the support insulator 110, which improves ease and safety of the work.

[0054] Although the embodiment of the present invention has been described above, the embodiment of the present invention is not limited to the above embodiment, and various modifications and implementations are possible. In addition, some of the components of the above embodiment may be omitted or modified. [Explanation of symbols]

[0055] 1...lightning protection device storage case, 1a...case center line, 1b...case center, 2...lower case, 3...upper case, 4...hinge, 5...fastening device, 6, 6a1, 6a2, 6b-6e, 6x1, 6x2...hanging device, 10...lightning protection device, 11...lightning protection insulator, 11a, 11b...cap portion, 11c...lightning protection insulator center line, 12a, 12b...terminal fitting, 13...support fitting, 13a...hole, 14...coordinate adjustment fitting, 14a...long hole, 15...rope, 16...support rope, 16a...hook, 17...flat braided wire, 21...lower case body, 21a...recess , 22...front plate, 22a...recess, 23...rear plate, 23a, 23b...recess, 31...upper case body, 32...front plate, 33...rear plate, 33a, 33b...recess, 100...jumper unit, 101...cable head, 102...terminal adapter, 103...turnbuckle, 104a, 104b...jumper wire, 110...support insulator, 120...pylon side mounting bracket, 120a, 120b...connecting bracket, 130...electric wire side mounting bracket, 130a, 130b...connecting bracket, 140...overhead power line

Claims

1. A lightning insulator having a built-in lightning protection element and formed from an insulating rubber material; A pair of terminal fittings connected to the lightning protection element and exposed from the lightning protection insulator; A lightning arrester storage case for storing a lightning arrester having a pair of connecting fittings attached to the pair of terminal fittings and connected to a support insulator attached to a steel tower and supporting a power transmission line, a housing that houses the lightning arrester while exposing the pair of connecting fittings by sandwiching and fixing a portion of the pair of connecting fittings in a recess of a plate; The housing is configured so as not to come into contact with the lightning insulator. Lightning protection device storage case.

2. The housing has a plurality of hanging fixtures attached to an outer surface thereof for hanging the lightning arrester storage case. The lightning arrester storage case according to claim 1.

3. The housing is openable and closable. The lightning arrester storage case according to claim 2.

4. The housing has a cylindrical shape as a whole and includes a semi-cylindrical lower case and an upper case, both ends of which in a longitudinal direction are closed. a hinge that supports the lower case and the upper case so as to be openable and closable; a locking device for fixing the lower case and the upper case in a closed state; The lightning arrester storage case according to claim 3, further comprising:

5. When the lightning arrester storage case housing the lightning arrester is hung by the hanging tool, the hinge is provided to be located on the upper side and the locking tool is provided to be located on the lower side. The lightning arrester storage case according to claim 4.

Images