KR20200063788A - Underground low voltage distribution box, and installation method of underground low voltage distribution box - Google Patents

Abstract

According to an embodiment of the present invention, provided is an underground low voltage distribution box which can be easily installed and removed by being easily coupled with a ground transformer through a coupling unit. The underground low voltage distribution box comprises: an enclosure having a pair of facing side plates, a cover plate connecting the side plates, a back surface plate, a front surface plate including an opening, and a bottom plate; a door rotatably assembled on an outer circumferential surface of the front surface plate through a rotating member to open and close the opening and having a locking means; a cable support unit capable of fixing a plurality of cables; and a coupling unit having an insulating plate to which a current breaker and a bus bar are fixed and a plurality of grooves and bolt holes.

Description

How to install the underground low voltage distribution box and the underground low voltage distribution box{UNDERGROUND LOW VOLTAGE DISTRIBUTION BOX, AND INSTALLATION METHOD OF UNDERGROUND LOW VOLTAGE DISTRIBUTION BOX}

The present invention relates to an underground low voltage distribution box, and more particularly, to an underground low voltage distribution box integrally installed on the ground transformer side.

In general, a low voltage distribution box is installed in the middle of a low voltage distribution line between a low voltage line for low voltage distribution lines and a low voltage junction box for low and medium voltage connection, and is used for preventing wide-range power outages for branching of branch or incoming lines and separating fault sections of low voltage distribution lines. .

As of December 2015, 43,282 ground transformers and 2,144 low-voltage distribution boxes were installed and operated in multiple protection systems.

That is, in urban areas, it is supplied to each consumer through a low-voltage distribution box adjacent to the ground transformer installed on the roadside, and in a small-scale power-consumption consumer area, distribution lines are constructed and supplied to each consumer through a low-voltage distribution box.

As shown in FIG. 1, since these low-voltage distribution boxes are individually installed on the ground transformer, there is a problem in that material cost and installation cost are excessive compared to effects, and a low-voltage distribution box is applied for occupancy by the local government to install the low-voltage distribution box, and permission is occupied. There is a problem in that an inconvenient payment of an occupancy fee is required every year and over-investment of the application of a multiple protection method compared to the load characteristics of the customer.

Korean Registered Utility No. 0480229

Embodiments of the present invention is a method for installing the underground low voltage distribution box and the ground voltage distribution box to the ground transformer to reduce the cost associated with the conventional low voltage distribution box occupancy service by integrating the underground low voltage distribution box to the ground transformer to reduce the material cost and installation cost. Want to provide.

According to one aspect of the present invention, the outer circumferential surface of the front plate to open and close the enclosure having a front plate and a bottom plate including a pair of opposing side plates and a cover plate connecting the side plates, a back plate, and an opening. It is rotatably assembled through a rotating member, and includes a cable support part capable of fixing a door and a plurality of cables with a locking means, an insulation plate to which a current breaker and a bus bar are fixed, and a fastening part having a plurality of grooves and bolt holes And, the back plate may contact one surface of the ground transformer.

In addition, the cable support part includes a support bar including a plurality of bolt holes and a cable bar connecting the support and including a plurality of cable fixing units, and the support can be located on both sides of the bottom plate lengthwise direction of the housing. .

In addition, it may include a cover in contact with the upper side of the rear plate and bent toward the ground transformer side.

In addition, air vents may be included on one side or both sides of the housing.

In addition, the cover plate may have a bent or convex upward shape.

In addition, it may include a reinforcement having a plurality of reinforcement on the inner surface of the door.

In addition, a waterproof packing may be included on the outer peripheral surface of the front plate.

In addition, it may include a rotation preventing portion connected between the inner surface of the door and the outer peripheral surface of the front plate.

In addition, it includes a lifting portion coupled to the side plate, the lifting portion may include a bolt hole and a lifting hole.

According to an aspect of the present invention, the step of fastening with the ground transformer through the fastening portion located on the side plate of the enclosure in the underground low voltage distribution box of claim 1 and the busbar and the N-phase busbar and the ground transformer connected to one side of the circuit breaker on the insulating plate in the enclosure. It may include the step of connecting the power cable via a copper tube terminal, and connecting the bus bar and the N-phase bus bar connected to the other side of the breaker to the customer power cable via the copper tube terminal.

Embodiments of the present invention can be integrated into a slim ground and low voltage distribution box installed on a ground transformer or a newly installed ground transformer, there is an effect that can reduce the material and installation costs and reduce the cost associated with the distribution box occupancy service.

In addition, it is convenient to install and remove the underground low voltage distribution box by facilitating the fastening with the ground transformer through the fastening portion present in the embodiments of the present invention.

1 is a photograph showing a conventional underground low-voltage distribution box.
2 is a conceptual diagram to which an embodiment of the present invention is applied.
3 is a perspective view of an embodiment of the present invention.
4 is an internal view of FIG. 3;
5 is a bottom view of an embodiment of the present invention.
6 is a side view of an embodiment of the present invention.
7 is an enlarged view of a fastening portion provided in an embodiment of the present invention.
Figure 8 is an enlarged view of the lifting portion provided in the embodiment of the present invention.
Figure 9 is a side view of the embodiment of the present invention fastened to the underground transformer.
10 is a front view of an embodiment of the present invention.

Hereinafter, with reference to the drawings according to an embodiment of the present invention.

The present invention underground low voltage distribution box (2000) is built in a circuit breaker (2174) and is operated by a separate protection method that supplies current to a number of consumers.

In addition, the present invention, the underground low-voltage distribution box (2000) is configured to enable the distribution box slimming and load safety management by being integrated with the ground transformer (1000) as shown in FIG. In the FIG. 2, the part of the two rectangular parallelepiped shapes shown below the underground transformer 1000 and the underground low voltage distribution box 2000 is a concrete base, and is a support for installing the underground transformer 1000. By installing the underground transformer 1000 on the concrete foundation, the underground low voltage distribution box 2000 of the present invention is installed in the remaining space, thereby reducing the area occupied by the distribution box and reducing costs associated with occupancy work.

The specific configuration of the inventors underground low-voltage distribution box 2000, as shown in Figure 3, includes a housing 2100, a door 2200, a cover 2300, a lifting part 2400, and a fastening part 2500 Can be.

The enclosure 2100 includes a pair of opposing side plates 2110 and a cover plate 2120 connecting the side plates 2110, a bottom plate 2130, a back plate 2140, and a front surface including an opening 2152. Plate 2150 may be included.

The enclosure 2100 is an outer case for storing and protecting internal parts including a cable support 2160, an insulating plate 2170, a busbar 2172, a circuit breaker 2174, and the like, and the appearance of the underground low voltage distribution box 2000 Make up.

The enclosure 2100 may have one side of the rear plate 2140 fixed to the ground transformer 1000 and/or the ground by bolts or the like.

Ground transformer power cables 2177 may be inserted into the bottom 2100 through the opening 2132 in the bottom plate 2130. The inserted ground transformer power cables 2177 may be connected to a circuit breaker 2174 for each phase through a copper tube terminal 2176 and a busbar 2172.

The enclosure front plate opening 2152 may be opened and closed by a door 2200 to be described later. According to the embodiment illustrated in FIG. 10, the opening 2152 is substantially similar to the shape of a letter'W', but is not limited thereto.

The housing cover plate 2120 may have a shape that is bent or raised convexly, so that when water falls on the cover plate 2120, the cover plate 2120 may descend without falling on the cover plate.

Furthermore, in order to prevent the inflow of water into the space between the rear panel 2140 of the enclosure and the ground transformer 1000, the upper surface of the rear panel 2140 is contacted and the cover 2300 bent toward the ground transformer 1000 is provided. Can be. The cover 2300 may be coupled to the rear plate 2140 in a variety of coupling manners such as bolting, welding, and sliding.

An air vent 2600 may be included on one side or both sides of the enclosure 2100. Air circulation between the inside and outside of the enclosure 2100 may be performed through the air vent 2600, thereby preventing an increase in the temperature inside the enclosure 2100. In addition, the housing 2100 is preferably made of a corrosion-resistant metal material, but may also be made of a synthetic resin material.

As shown in FIG. 10, a rotating member 2220 is provided on one side of the door 2200 to be rotatably installed on the outer circumferential surface of the front plate 2150 of the trap, to open and close the opening 2152, and the rotating member 2220 ) May be, for example, a hinge.

A locking means 2700 is provided inside the door 2200, and a bolt hole exists on the outside of the door 2200 so that the door can be locked through the bolt 2710 through the bolt hole. The insertion portion 2720 into which the bolt 2710 can be inserted may be coupled to the inside of the housing front plate 2150 as shown in FIG. 10. The bolt 2710 used herein is a flat head bolt that prevents the head from being rotated, and the head is a hexagonal bolt having a hexagonal shape, but is not limited thereto.

Unlike the above embodiment, the locking means 2700 is not limited to the door lock through the bolt fastening, and is operated via a key from the outside of the door to be rotated inside the front panel 2150 of the enclosure to selectively select the door 2200. It may be of a type that is fixed to the opening (2152).

At least one of all corners of the door 2200 may include a bent part 2210 that is bent more than once. However, when the door 2200 is closed, the bent portion 2210 may be omitted on both sides in the longitudinal direction of the door 2200 for a firm closing with the front plate 2150 of the enclosure, as illustrated in FIG. 10. As can be seen it looks like a groove.

The bent portion 2210 is to prevent the inflow of water sprinkling from all directions, and more reliably prevent the infiltration of water flowing into the inside of the trap 2100 from between the outer circumferential surface of the front plate 2150 of the trap and the door 2200 To do so, a waterproof packing 2800 may be formed on the outer circumferential surface of the front plate 2150 of the hamchae.

The inner surface of the door 2200 may include a reinforcement part 2910 having a plurality of reinforcement stands 2912. The plurality of reinforcing bars 2912 may be continuously connected to form an'ㅁ' shape, or an'X' shape to form a shape of the reinforcing portion 2910 is not limited. Since the reinforcing portion 2910 is present on the inner surface of the door 2200, door shake is prevented from external shock and durability can be enhanced.

A rotation preventing portion 2920 may be provided between the inner surface of the door 2200 and the outer circumferential surface of the housing front plate 2150 as shown in FIG. 10. Due to the presence of the anti-rotation portion 2920, the door 2200 rotates 180 degrees or more, and thus, a bunch that can be applied to the rotating member 2220 can be removed in advance.

The cable support 2160 may include a support bar 2162 including a plurality of bolt holes 2163 and a cable bar 2164 connecting the support 2162 and including a plurality of cable fixing units 2165. .

The support 2162 may be located on both sides in the longitudinal direction of the housing bottom plate 2130 so that the support is provided on at least one of the housing bottom plate 2130 and the housing back plate 2140 for solid support of the cable bar 2164. Two or more (2162) can be fused.

As illustrated in FIG. 4, the cable bar 2164 may control access to and from the plurality of cable fixing units 2165 through the holes 2166. When power cable support is required, it is preferable that the cable fixing unit 2165 is substantially similar to an'U' shape, considering that the power cable is securely supported through the cable fixing unit 2165 and the power cable is cylindrical. Do.

The insulating plate 2170 is fixed to the inside of the enclosure 2000 and supports internal parts such as a busbar 2172 and a breaker 2174.

The ground transformer power cable 2177, busbar 2172, circuit breaker 2174, and consumer power cable 2178 are disposed on the front surface of the insulating plate 2170.

The busbars 2172 and 2173 become four phases of R, S, T, and N, and colors may be assigned to distinguish each phase. For example, R may be red, S white, T blue, and N black.

Each busbar 2172 may be connected to the circuit breaker 2174 through the copper tube terminal 2176. The circuit breaker 2174 may have a phase loss prevention function, and may be two or more provisional or thermoelectric circuit breakers for variable cable rated current.

Each busbar 2172 has a breaker current capacity or higher. The end of the busbar 2172 may be provided with two bolt holes or a fastening portion to allow connection of the copper tube terminal 2176.

The lifting part 2400 is coupled to the enclosure side plate 2110, and may include a bolt hole 2440 and a lifting hole 2420. The bolt hole 2440 is a point where a bolt is inserted for coupling with the enclosure side plate 2110, and the lifting hole 2420 is for moving the underground low voltage distribution box 2000 of the present invention. The lifting part 2420 rotates about the bolt hole 2440 when the underground low voltage distribution box 2000 of the present invention is moved so that the lifting hole 2420 is present on the enclosure cover plate 2120, and In other cases, the lifting hole 2420 may exist on the side plate 2110 of the enclosure so that the lifting portion 2420 is not positioned outside the enclosure 2100.

The fastening part 2500 may include a plurality of grooves 2520 and a bolt hole 2510. The fastening part 2500 is a projecting groove 1100, for example, a bolt head, which is present on the ground transformer 1000 in order to ensure that the underground low voltage distribution box 2000 according to the present invention is coupled with the ground transformer 1000 side. This is to make a connection with the same part. Therefore, the fastening part 2500 is provided with a groove 2520 for coupling with the protruding groove 1100. In order to adjust the distance between the underground low voltage distribution box 2000 and the underground transformer 1000 according to the size of the underground transformer 1000 or the external environment, a plurality of grooves 2520 may be continuously provided.

The lifting part 2420 and the fastening part 2500 may fasten the bolt in a state where a washer is fastened to the end of the bolt in the state where the respective bolt holes overlap.

For the easy installation of the inventors underground low voltage distribution box (2000), only the fastening part (2500) should be attached to the ground transformer (1000) side, so the depth of the recess (2520) is the protrusion existing in the underground transformer (1000) It should be deep enough to engage the groove 1100.

The process of installing the underground low voltage distribution box 2000 using the embodiment of the present invention can be fastened with the ground transformer 1000 through the fastening part 2500 provided on the side plate 2110 of the enclosure. For more secure fastening, the enclosure 2100 can be bolted to one surface and/or the ground of the ground transformer 1000 to fix the enclosure 2100 to the ground transformer 1000 side. In addition, the insulating plate 2170 on which the busbar 2172 and the circuit breaker 2174 are disposed may be fixed to the inside of the enclosure 2100 via a bolt.

The cover 2300 bent toward the ground transformer 1000 may be installed on the rear panel 2140 of the enclosure to contact the rear panel 2140.

Copper tube terminals (2176) for R, S, T phase busbars (2172) and N phase busbars (2173) and ground transformer power cables (2177) connected to one side of the breaker (2174) on the insulating plate (2170) in the enclosure (2100) And the R, S, T-phase busbar 2172 and N-phase busbar 2173 connected to the other side of the circuit breaker 2174 to the accommodating power cable 2178 via the copper tube terminal 2176. I can connect.

The above-described ground low voltage distribution box 2000 can reduce the cost associated with the distribution box occupancy service, thereby reducing material costs and labor costs. In addition, when the ground transformer (1000) is newly installed, there is no need to install a separate underground low voltage distribution box, which can prevent traffic inconveniences and civil complaints related to occupancy.

As described above, one embodiment of the present invention has been described, but those skilled in the art can add, change, delete, or add elements within the scope of the present invention as described in the claims. It will be said that the present invention can be variously modified and changed by the like, and this is also included within the scope of the present invention.

1000: ground transformer
2000: Underground low voltage distribution box
2100: enclosure
2200: door
2300: cover
2400: Salvage Department
2500: fastener
2600: Air vent

Claims (10)

A housing having a pair of opposing side plates and a cover plate connecting the side plates, a back plate, and a front plate and a bottom plate including openings; and a rotating member on the outer circumferential surface of the front plate to open and close the opening It is possible to assemble, a door having a locking means; and a cable support for fixing a plurality of cables; and an insulation plate to which a current breaker and a busbar are fixed; and a fastening part having a plurality of grooves and bolt holes;
Underground low voltage distribution box, characterized in that the back plate is in contact with one surface of the ground transformer. According to claim 1,
The cable support includes a support bar comprising a plurality of bolt holes; and a cable bar connecting the support and including a plurality of cable fixing units;
The support is located on both sides in the longitudinal direction of the bottom plate of the housing, characterized in that the low-voltage distribution box. According to claim 1,
Underground low voltage distribution box, characterized in that it comprises a cover that is in contact with the upper side of the rear plate and bent toward the ground transformer. According to claim 1,
Underground low pressure distribution box, characterized in that the air vent is included on one or both sides of the housing. According to claim 1,
Underground low voltage distribution box, characterized in that the cover plate has a bent or convex upward shape. According to claim 1,
Underground low-voltage distribution box, characterized in that it comprises a; reinforcement having a plurality of reinforcement on the inner surface of the door. The method of claim 5,
Underground low voltage distribution box characterized in that it comprises a waterproof packing on the outer peripheral surface of the front plate. The method of claim 5,
Underground voltage distribution box characterized in that it comprises a rotation preventing portion connected between the inner surface of the door and the outer peripheral surface of the front plate. The method of claim 5,
It includes a lifting portion coupled to the side plate,
The lifting portion underground voltage distribution box, characterized in that it comprises a bolt hole and the lifting hole. The step of fastening with the ground transformer through a fastening portion located on the side plate of the enclosure in the underground low-voltage distribution box of claim 1; And
The busbar connected to one side of the breaker on the insulating plate in the enclosure and the N-phase busbar and the ground transformer power cable are connected via copper tube terminals, and the busbar and N-phase busbar connected to the other side of the circuit breaker are connected to the customer's power cable via copper tube terminals. A method of installing an underground low voltage distribution box comprising the step of connecting.

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