JP2022120873A - ground-mounted transformer - Google Patents

Abstract

To provide a ground installation-type transformer which can improve productivity by further reducing the number of components constituting a pressure-discharge device, simplifying a configuration and eliminating assembly adjustment as much as possible.SOLUTION: Ventilation openings 34a-34c and 35a-35d are provided in one compartment room 37a housing a transformer device 38, and a part of a bulkhead 36 is constituted of gaskets 47 and 48, The gaskets 47 and 47 are configured to be disengaged from the bulkhead 36 when internal pressure in the other compartment room 37b abnormally increases. Thus, the internal pressure of the other compartment room 37b is released to one compartment room 37a, and is discharged to the outside from the ventilation openings 34a-34c and 35a-35d.SELECTED DRAWING: Figure 8

Description

TECHNICAL FIELD The present invention relates to improvements in ground-mounted transformers that are installed on sidewalks in areas such as urban areas where distribution lines are underground, receive high-voltage power, step it down, and supply power to low-voltage consumers.

In urban commercial areas and busy urban areas, the underground power distribution system has long been widely used in place of the overhead power distribution system in order to maintain the beauty of the city and prevent power outages caused by the collapse of utility poles in the event of a disaster. It is being adopted.

As the electrical equipment used in the underground power distribution system, ground-mounted transformers, which house high-voltage equipment, a transformer device, and a low-voltage branch device in a housing, are generally installed on sidewalks.

The above-mentioned ground-mounted transformer is generally installed at a position close to the roadway on a sidewalk with a lot of traffic. In order to prevent intrusion of dust, dirt, moisture, etc., and to prevent contact with live parts, such as sticking metal objects such as wires from the outside due to mischief, it is almost sealed with a metal housing leaving ventilation holes. It is formed in a

As a result, if a short-circuit accident or the like occurs on the side of the high-voltage equipment housed in the housing and the internal pressure in the compartment housing the high-voltage equipment rises sharply, the internal pressure must be released quickly to There was a problem that the body was damaged by the internal pressure, and the joint part of the housing was peeled off.

For this reason, conventionally, for example, as in the ground-mounted electrical equipment (ground-mounted transformer) disclosed in Japanese Utility Model Publication No. 3-57045, the abnormal pressure inside the housing is released to the outside, A pressure release device is installed to prevent damage.

In addition, the applicant of the present application has disclosed a low-cost pressure relief device having a structure that can be installed in a narrow space in a housing by simplifying the configuration of the conventional pressure relief device in Patent Document 1 below.

JP 2006-129628

The ground-mounted transformer device disclosed in the above-mentioned Patent Document 1 generally includes a pressure relief device as follows. 5 to 7 of Patent Document 1, the pressure release device A is composed of a spring member 15 and a stopper member 21, and is located inside the compartment 2b of the pressure release door 11 shown in FIG. , a pair is attached to the upper and lower portions shown in FIG.

As shown in FIG. 6 of Patent Document 1, the spring member 15 is made of a flat plate-like horizontally long leaf spring, and is attached by bolting the base end to the first vertical beam 2b1 of the compartment 2b of the housing 2, or the like. The free end side of the tip of the leaf spring extending toward the free end side of the pressure relief door 11 is secured by locking pins 17 implanted in the pressure relief door 11 in the longitudinal direction of the leaf spring. is attached to the pressure release door 11 by loosely fitting the .

The stopper member 21, as shown in FIGS. A rotatably pivoted lever body 23, a locking plate 24 secured to the inner surface of the pressure release door 11 facing the free end side of the tip of the lever body 23, and a locking plate 24 extending in its length direction. An engaging pin 26 attached to the free end of the lever body 23 is loosely fitted into the horizontal hole 25 so that the lever body 23 is connected to the pressure release door 11. The pressure release device A is configured to support the spring member 15 so that the restoring force (spring pressure) of the spring member 15 is not lost when the spring member 15 is opened at a certain angle or more.

When an internal short-circuit accident or the like occurs in the partitioned chamber 2b containing the high-voltage equipment 7 and the internal pressure of the partitioned chamber 2b rises, the internal pressure presses the entire peripheral wall of the partitioned chamber 2b. If less than the spring pressure of member 15, relief door 11 will hardly open. However, when the internal pressure becomes higher than the spring pressure of the spring member 15, the pressure release door 11 is pushed open to release the pressure inside the compartment 2b to the outside through the pressure release port 11a.

As shown in FIG. 7, the pressure-releasing door 11 is pivotally supported in the compartment 2b, and is opened to the outside of the housing 2 against the spring pressure of the spring member 15 about a rotating member 29 such as a hinge. be. When the internal pressure is released, as shown in FIG. 5, the locking pin 17 loosely fitted in the long hole 16 drilled at the tip of the spring member 15 moves inside the long hole 16 as the pressure release door 11 is opened. When the spring member 15 reaches the end of the long hole 16, the spring member 15 bends into a bow shape as shown in FIG.

In addition, as the pressure release door 11 is opened, the lever body 23 of the stopper member 21 rotates clockwise around the pivot point of the support plate 22 to which the base end is pivotally supported in FIG. The tip of the lever body 23 follows the opening of the pressure release door 11 by moving rightward in FIG. to move.

When the locking pin 26 at the tip of the lever body 23 reaches the end of the horizontal hole 25, the pressure relief door 11 is prevented from being opened beyond the dead point of the spring member 15 any further.

The pressure release device A described in Patent Document 1 described above is configured as described above, and as shown in FIGS. It can be installed using space and contributes to miniaturization of ground-mounted transformer equipment.

In addition, it has the advantage of being able to be constructed simply and inexpensively, as compared with pressure relief devices of the past.

However, the pressure release device A described in Patent Document 1 requires the spring member 15 and the stopper member 21 as described above. It is necessary to bolt the base end of the spring to the first vertical beam 2b1, or provide a long hole 16 at the tip of the leaf spring to loosely fit the locking pin 17 planted in the pressure release door 11.

Also, the stopper member 21 is composed of a support plate 22, a lever body 23, and a locking plate 24. It is movably pivoted, an engagement pin 26 is attached to its free end, and the locking plate 24 is secured to the inner surface of the pressure release door 11, and then a horizontal hole 25 is formed in the locking plate 24. The engaging pin 26 must be loosely fitted in the lateral hole 25, and many members having special shapes must be prepared, which hinders the production cost of the pressure relief device A. was a factor.

In addition, assembly and adjustment are required to assemble these many members, which requires a considerable amount of labor, skill, and working time, causing a decrease in productivity.

Therefore, in view of the various problems described above, the present invention further reduces the number of parts constituting the pressure relief device to make the structure simpler and eliminates the need for assembly adjustment as much as possible, thereby improving productivity. It is an object of the present invention to provide a ground-mounted transformer capable of

In the ground-mounted transformer according to claim 1, the housing is divided into two compartments, one of which houses and installs the transformer device, and the primary side of the transformer device is connected to the housing through the partition wall. A ground-mounted transformer configured by connecting to a high-voltage equipment housed and installed in the other compartment, and connecting the secondary side of said transformer device to a low-voltage branch device connected to the consumer side, wherein said transformer device One of the compartments housing the high-pressure equipment is equipped with a ventilation port to the outside, and a part of the partition wall is composed of a gasket, and when the internal pressure in the other compartment containing the high-pressure equipment rises, the gasket falls off. It is characterized in that it is configured to

The ground-mounted transformer according to claim 2 is characterized in that the tank of the transformer device according to claim 1 is used when the partition is mounted inside the housing.

A ground-mounted transformer according to claim 3 is characterized in that a part of the partition wall is formed by an outer frame having a double structure sandwiching the gasket according to claim 1 or claim 2 .

A ground-mounted transformer according to claim 4 is characterized in that the gasket according to any one of claims 1 to 3 is arranged between the transformer device and the inner surface of the housing.

In the ground-mounted transformer according to claim 5, the gasket according to claim 3 or 4 is attached between the outer frames of the double structure by supporting one point thereof by a fixing member. It is characterized by

The ground-mounted transformer according to claim 6 is characterized in that the outer frame according to any one of claims 1 to 5 is provided with a hollow portion for applying the internal pressure of the other compartment to the gasket, and the outer frame. It is characterized in that it is configured with a mounting portion for mounting at a fixed position.

A ground-mounted transformer according to claim 7 is characterized in that the mounting portion according to claim 6 is provided with a fixed portion.

According to the first aspect of the invention, when the internal pressure of the compartment in which the high-pressure equipment is housed is normal, the compartment is kept sealed, and when the internal pressure of the compartment rises abnormally, the By falling off the gasket attached to the partition wall between the compartment and the compartment containing the transformer device, the internal pressure of the compartment containing the high-voltage equipment is released to the side of the compartment containing the transformer device, Since it can be discharged to the outside from the ventilation opening provided in the compartment where the transformer equipment is housed, the case of the ground-mounted transformer will be damaged due to an abnormal rise in the internal pressure of the compartment where the high-voltage equipment is housed. You can definitely prevent it from happening.

According to the second aspect of the invention, since the tank of the transformer device can be used for mounting the partition, the number of parts of the pressure relief device can be reduced as much as possible, and the manufacturing cost can be suppressed.

According to the third aspect of the invention, the gasket is sandwiched between the outer frames of the double structure, and the outer frame is fixed to the tank of the transformer device to form a part of the partition wall. need not be prepared separately.

According to the fourth aspect of the invention, since the gasket is arranged between the transformer device and the inner side surface of the housing, the dead space in the housing can be effectively used to mount the pressure relief device, thereby improving the device. It can contribute to miniaturization.

According to the fifth aspect of the invention, when internal pressure is applied to the gasket attached between the outer frames of the double structure, the gasket rotates around the support point of the fixing member, thereby removing the gasket from between the outer frames of the double structure. It becomes possible to drop easily.

According to the sixth aspect of the invention, the structure of the pressure relief device can be simplified, so assembly and adjustment are not required as much as possible, and the pressure relief device can be installed with less labor and less work time, improving productivity. can be achieved.

According to the seventh aspect of the present invention, since the mounting portion of the outer frame is provided with the fixing portion, the degree of freedom of the fixing position of the outer frame can be increased.

1 is a front view of a ground-mounted transformer of the present invention; FIG. FIG. 2 is a plan view showing a state in which the door of the ground-mounted transformer of the present invention is opened; 1 is a right side view of a ground-mounted transformer of the present invention; FIG. 1 is a rear view of a ground-mounted transformer of the present invention; FIG. 1 is a front view showing the inside of a ground-mounted transformer of the present invention; FIG. FIG. 2 is a left side view showing the inside of the ground-mounted transformer of the present invention; 1 is a plan view showing the inside of a ground-mounted transformer of the present invention; FIG. 1 is a schematic perspective view of the low-voltage side of a ground-mounted transformer of the present invention; FIG. FIG. 4 is a perspective view for explaining a method of attaching a pressure release device to a transformer constituting a low-voltage side of the ground-mounted transformer of the present invention; FIG. 2 is a left side view showing a case where a pressure relief device is attached to a transformer constituting a low-voltage side of the ground-mounted transformer of the present invention; FIG. 4 is a left side view showing a state in which the transformer-mounted pressure relief device constituting the low-voltage side of the ground-mounted transformer of the present invention is in operation;

An embodiment of the present invention will be described below with reference to FIGS. 1 to 10. FIG. FIG. 1 is a front view showing a ground-mounted transformer PMT of the present invention, which is often used by being installed on the side of a sidewalk (at the boundary with a roadway) in an urban area or the like.

In FIG. 1, 31 is a housing (case) of the ground-mounted transformer PMT formed in a rectangular shape, 32 is a first inspection door attached to the right side of the housing 31 when viewed from the front, and 33 is the housing. 31 shows a second inspection door attached to the left side of 31 in front view.

FIG. 2 is a plan view of the ground-mounted transformer PMT of the present invention, showing a state in which the first inspection door 32 and the second inspection door 33 are opened. The ground-mounted transformer PMT is installed on the sidewalk so that the opening direction of the first inspection door 32 is the sidewalk side.

FIG. 3 is a right side view of the transformer PMT, in which ventilation holes 34a to 34c are provided in a part of the housing 31. As shown in FIG. FIG. 4 is a rear view of the transformer PMT, and ventilation holes 35a to 35d are provided in a part of the housing 31. As shown in FIG. The ground-mounted transformer PMT is installed on the sidewalk so that the ventilation openings 35a to 35d shown in FIG. 4 are located on the roadway side.

FIG. 5 is a front view showing the internal structure of the ground-mounted transformer PMT of the present invention, and FIG. 6 is a left side view showing the internal structure of the transformer PMT. As shown in FIG. 5, in the ground-mounted transformer PMT of the present invention, the inside of a housing 31 is partitioned into two chambers in the width direction (horizontal direction in FIG. 5) by a partition wall 36 .

A transformer device 38 that constitutes the low-voltage side of the ground-mounted transformer PMT is accommodated and installed in one compartment (right side in FIG. 5) 37a of the housing 31. In front of the transformer device 38, is provided with a low-voltage branch device 39 electrically connected to the secondary charging portion of the transformer device 38 .

Reference numeral 40 denotes a low-voltage side cable connected to the low-voltage branching device 39, which is connected to the consumer side via a low-voltage side distribution line (not shown). 41 denotes a ground line connected to the low-voltage branch device 39. FIG.

As shown in FIGS. 5 and 6, a high-voltage device 42 is housed in the other compartment 37b of the housing 31. The high-voltage device 42 is generally operated by a switch 42a and a high-voltage cutout 42b. It is configured. The high voltage cutout 42b is connected to the high voltage side of the transformer device 38, and the switch 42a is connected to a high voltage side distribution line (not shown) via a high voltage side cable 43. As shown in FIG.

When the first inspection door 32 shown in FIGS. 1 and 2 is opened from the front side, the transformer device 38 and the low-voltage branch device 39 shown in FIG. inspection can be carried out. When the second inspection door 33 shown in FIGS. 1 and 2 is opened from the left side, the high voltage equipment 42 shown in FIG.・Inspection can be performed.

Next, the configuration of the pressure relief device, which is a characteristic part of the present invention, will be described. FIG. 7 is a plan view showing the inside of the ground-mounted transformer PMT of the present invention. The pressure release device of the present invention constitutes a part of the partition wall 36 which forms two compartments 37a and 37b in the housing 31. As shown in FIG.

That is, the partition wall 36 is located between the first pressure release device 44 installed between the upper surface of the housing 31 on the transformer device 38 and the rear surface of the housing 31 on the rear side of the transformer device 38. and a partition plate 46 installed between the first inspection door 32 of the housing 31 on the front side of the transformer device 38 and the second pressure release device 45 installed in the transformer device 38 .

The mounting positions of the pressure release devices 44 and 45 and the partition plate 46 are shown in the schematic diagram (perspective view) of the transformer device 38 shown in FIG. The first pressure release device 44 is attached to an upper position on the left end of the transformer device 38 when viewed from the front, and the second pressure release device 45 is attached to a rear position on the left end of the transformer device 38 when viewed from the front, The partition plate 46 is attached to the front position of the left end of the transformer device 38 when viewed from the front.

The gap between the left side of the first pressure release device 44 and the upper corner of the second pressure release device 45 in the side view, the right side of the first pressure release device 44 and the partition plate 46 side. Closing members, which will be described later, are attached to the gaps at the corners on the upper side and other gaps, and the partition walls 36 are formed by these members.

At the center of the first pressure release device 44 and the second pressure release device 45, there are gaskets 47, 48 that fall off from the respective pressure release devices 44, 45 when the internal pressure of the compartment 37b on the high pressure side rises abnormally. installed.

Next, the structures of the first pressure release device 44, the second pressure release device 45 and the partition plate 46, and the method of fixing them in the housing 31 will be described with reference to FIG.

FIG. 9 is an enlarged perspective view of a main part showing the structure of a transformer device 38, first and second pressure release devices 44 and 45 attached thereto, and a partition plate 46, which constitute the ground-mounted transformer PMT of the present invention. be.

The first pressure release device 44 is roughly constituted by an outer frame made up of two thin steel plates 49 and 50 which are rectangular and stand upright with their longitudinal directions oriented sideways. The two thin steel plates 49 and 50 have hollow portions 51 and 52 (52 is not indicated by a drawing number for drawing purposes) formed by opening the central position, and mounting portions 53 and 54 around the hollow portions. A gasket 47 is sandwiched between the two thin steel plates 49 and 50 .

The gasket 47 is securely sandwiched and supported by one of the first fixing members 55 by fixing between the two thin steel plates 49 and 50 with the first fixing members 55 .

One of the two thin steel plates 49 and 50 has a second fixing portion 56 attached to the lower end of one of the thin steel plates 49 and 50 so as to protrude leftward when the transformer device 38 is viewed from the front. A second mounting hole 58 for mounting a second fixing member 57 is formed in the fixing portion 56 .

The second fixing member 57 is composed of a second bolt 60 projecting upward from the upper surface (not shown) of the tank 59 of the transformer device 38 and a second nut 61 attached thereto. The second bolt 60 is inserted through an insertion hole 63 formed in a top plate 62 placed on the top surface (not shown) of the tank 59 and protrudes upward from the top surface of the top plate 62. Its main purpose is to , the top plate 62 is fixed to the upper surface of the tank 59 of the transformer device 38 .

The second pressure release device 45 is roughly configured by an outer frame made up of two thin steel plates 64 and 65 standing upright with their longitudinal directions oriented vertically. The thin steel plates 64 and 65 have upper surfaces 66a and 66b, middle surfaces 67a and 67b, upper and lower surfaces 68a and 68b, vertical and short surfaces 69a and 69b connecting these surfaces, inclined surfaces 70a and 70b, and vertical surfaces 71a and 71a. 71b, and has a planar shape having lower lower stage surfaces 72a and 72b at the bottom.

The two thin steel plates 64, 65 have hollow portions 73, 74 (74 is not indicated by a drawing number for drawing purposes) formed by opening the central position, and mounting portions 75, 76 around the hollow portions. A gasket 48 is sandwiched between the two thin steel plates 64 and 65 .

The gasket 48 is securely sandwiched by fixing between the two thin steel plates 64 and 65 with a third fixing member 78 .

Further, the two thin steel plates 64, 65 are provided with fourth mounting holes 80a, 80b (80b are The fourth fixing member 79 is fixed to the edge of the side surface 59a of the tank 59 of the transformer device 38, and the side (the transformer device 38 is facing the front) is formed. It is composed of a fourth bolt 81 projecting leftward in view and a fourth nut 82 attached thereto.

The gasket 48 is supported between the two thin steel plates 64 and 65 by a set of a fourth bolt 81 and a fourth nut 82 .

The partition plate 46 is made of a single sheet of thin steel plate with its longitudinal direction vertically oriented. is formed. The fifth fixing member 84 is attached to the edge of the side surface 59a of the tank 59 of the transformer device 38 and protrudes laterally (to the left in front view of the transformer device 38). It consists of a bolt 86 and a fifth nut 87 attached thereto.

After inserting the second bolt 60 protruding upward from the top plate 62 of the transformer device 38 into the second mounting hole 58 of the second mounting portion 56, the first pressure release device 44 described above is By tightening a second nut 61 on the second bolt 60, the transformer assembly 38 is fixed on the edge of the top plate 62. As shown in FIG.

Further, the second pressure release device 45 inserts a fourth bolt 81 projecting laterally from the side surface 59a of the tank 59 of the transformer device 38 into the fourth mounting holes 80a and 80b, and then By tightening a fourth nut 82 on a fourth bolt 81, the transformer assembly 38 is fixed to the side 59a edge of the tank 59. As shown in FIG.

At this time, on the upper part of the two thin steel plates 64, 65 constituting the second pressure release device 45, upper stage surfaces 66a, 66b, middle stage surfaces 67a, 67b, vertical and short surfaces 69a, 69b connecting these, Since the inclined surfaces 70a, 70b connecting the middle stage surfaces 67a, 67b and the longitudinal surfaces 71a, 71b are formed, the top plate 62 of the transformer device 38 and the bushing 88 on the high voltage side protrude sideways from the side surface 59a of the tank 59. The top plate 62 is fitted onto the middle stage surfaces 67a and 67b even if the top plate 62 is closed. In other words, the bushing 88 can be attached so as to avoid the second pressure release device 45 by the inclined surfaces 70a and 70b, and the second pressure release device 45 can be tightly fixed to the side surface 59a of the tank 59. .

Also, the partition plate 46 has a fifth bolt 86 protruding sideways from the side surface 59 a of the tank 59 of the transformer device 38 inserted into the fifth mounting hole 85 , and then the fifth bolt 86 is attached to the fifth bolt 86 . 5 is secured to the opposite edge of the side 59a of the tank 59 of the transformer assembly 38 by tightening the nut 87 thereof.

At this time, since the upper stage surface 83 is formed on the upper part of the partition plate 46, even if the top plate 62 of the transformer device 38 protrudes laterally from the side surface 59a of the tank 59, the top plate 62 is It is possible to fit the partition plate 46 above the upper stage surface 83 , and the partition plate 46 can be tightly fixed to the side surface 59 a of the tank 59 .

FIG. 10 is a left cross-sectional view of the ground-mounted transformer PMT of the present invention, showing the state in which the first and second pressure release devices 44 and 45 and the partition plate 46 are attached to the side surface 59a of the tank 59 of the transformer device 38. is. As shown in FIG. 10, when the first and second pressure release devices 44 and 45 are attached, the position of the first pressure release device 44 in the horizontal direction and the upward direction, and the position above the second pressure release device 45 At the directional position, the leftward position, the downward position, and the upward position, the rightward position, and the downward position of the partition plate 46, gaps that cannot be completely sealed by the pressure release devices 44, 45 and the partition plate 46 are generated.

Therefore, these gaps are blocked by blocking members 89a to 89h made of gaskets so that they do not come off, thereby forming the partition wall 36 shown in FIG. Then, the first partitioned chamber 37a and the second partitioned chamber 37b are separated, and the inside of the second partitioned chamber 37b is made a closed space.

Next, a situation in which the first and second pressure release devices 44 and 45 configured as described above are utilized will be described. In the second compartment 37b housing the high-voltage device 42 shown in FIG. The inner wall surface of the housing 31 forming the periphery of the compartment 37b is pushed outward.

At the same time, the partition wall 36 separating the inside of the housing 31 into the first partitioned chamber 37a and the second partitioned chamber 37b is also pressed, and the partition wall 36 is pushed toward the first partitioned chamber 37a. At this time, a uniform pressure is applied to the partition wall 36 on the side surface 59a of the tank 59 of the transformer device 38 shown in FIG. is added.

Gaskets 47 and 48 are sandwiched between two thin steel plates 49 and 50 and between two thin steel plates 64 and 65 in the first and second pressure release devices 44 and 45, respectively. It is peeping out from the parts 51 and 73 .

Therefore, the internal pressure applied to the partition wall 36 is applied to the gasket 47 of the first pressure release device 44 and the gasket 48 of the second pressure release device 45 as shown in FIG. Alternatively, the pair of fourth bolts and nuts 81, 82 are rotated to fall off from between the two thin steel plates 49, 50 or from between the thin steel plates 64, 65 to form the first compartment 37a shown in FIG. open the side.

Then, as shown in FIG. 8, the first compartment 37a has ventilation openings 34a to 34c on the right side of the housing 31 and ventilation openings 35a to 35d on the back of the housing 31. The pressure inside the housing 31 flows inside the first compartment 37a as indicated by the dotted lines in FIG. 8, and is released to the outside through the plurality of ventilation openings 34a to 34c and 35a to 35d.

As a result, even if an abnormal internal pressure rise occurs in the second partitioned chamber 37b in which the high-pressure equipment 42 is housed, the pressure can be quickly released to the outside via the 31st partitioned chamber 37a. , it is possible to reliably prevent the problem that the housing 31 is damaged by the internal pressure or the joint portion of the housing 31 is peeled off.

As described above, the pressure relief device attached to the ground-mounted transformer of the present invention can dramatically reduce the number of parts and simplify the structure compared to the conventional pressure relief device. Since the device cost can be reduced and the assembly and adjustment at the time of installation are minimized, the installation work can be performed with less labor and less work time, and productivity can be improved.

In addition, since the pressure release devices 44 and 45 are configured using the partition wall 36 that separates the first compartment 37a and the second compartment 37b, it is necessary to separately secure a space for installing the pressure release devices 44 and 45. This contributes to miniaturization of the device.

INDUSTRIAL APPLICABILITY The present invention can be applied to various electric devices that form a closed space with partition walls.

31 housing 32 first inspection door 33 second inspection door 34a to 34c, 35a, 35d ventilation port 36 partition wall 37a first compartment 37b second compartment 38 transformer device 39 low voltage branch device 40 low voltage side cable 41 ground wire 42 high voltage side device 42a switch 42b high voltage cutout 43 high voltage side cable 44 first pressure relief device 45 second pressure relief device 46 partition plate 47, 48 gasket 49, 50, 64, 65 thin steel plate 51, 52, 73, 74 Hollow part 53, 54, 75, 76 Mounting part 55 First fixing member 56 Second fixing part 57 Second fixing member 58 Second mounting hole 59 Tank 59a Tank side surface 60 Second bolt 61 Second nut 62 Top plate 63 Insertion hole 66a, 66b Upper stage surface 67a, 67b Middle stage surface 68a, 68b Upper lower stage surface 69a, 69b Vertical short surface 70a, 70b Inclined surface 71a, 71b Longitudinal surface 72a, 72b Lower lower stage surface 78 Third fixing member 79 Fourth fixing member 80a, 80b Fourth mounting hole 81 Fourth bolt 82 Fourth nut 83 Fifth mounting hole 84 Fifth fixing member 85 Fifth mounting hole 86 Fifth bolt 87 fifth nut 88 bushing 89a-89h closing member PMT ground-mounted transformer

Claims (7)

The housing is divided into two compartments, one of which houses and installs a transformer device. and the secondary side of the transformer device is connected to a low-voltage branch device connected to the consumer side, in which one of the compartments housing the transformer device is ventilated to the outside A ground installation characterized in that a port is provided, a part of the partition wall is composed of a gasket, and the gasket falls off when the internal pressure in the other compartment in which the high-pressure equipment is housed and installed rises. type transformer. 2. The ground-mounted transformer according to claim 1, wherein the tank of the transformer device is utilized when mounting the bulkhead within the housing. 3. The ground-mounted transformer according to claim 1, wherein the gasket forms a part of the partition wall together with a double-structured outer frame sandwiching the gasket. 4. The ground-mounted transformer according to claim 1, wherein the gasket is arranged between the transformer device and the inner surface of the housing. 5. The ground-mounted transformer according to claim 3, wherein the gasket is attached between the outer frames of the double structure by supporting one point thereof with a fixing member. 6. The outer frame according to any one of claims 1 to 5, wherein the outer frame is composed of a hollow portion for applying the internal pressure of the other compartment to the gasket, and an attachment portion for attaching the outer frame to a fixed position. A ground-mounted transformer according to any one of the above. 7. The ground-mounted transformer according to claim 6, wherein the mounting portion is configured with a fixed portion.

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