Photovoltaic system and installation method thereof

Abstract

The invention discloses a photovoltaic system and an installation method thereof.The photovoltaic system comprises roof batten assemblies and photovoltaic tile modules installed on the roof batten assemblies, and the roof batten assemblies are sequentially arranged and used for being installed on a roof to form multiple rows of roof batten assemblies; a plurality of photovoltaic tile modules are sequentially arranged between every two adjacent rows of roof batten assemblies in a lap joint mode, and the photovoltaic tile modules on the two sides of each row of roof batten assemblies are in lap joint with one another to form a photovoltaic tile. According to the photovoltaic tile system, the photovoltaic pieces are installed on the basis of a lap joint mode, meanwhile, due to the design of the roof batten assemblies, the photovoltaic tile modules can be better installed on the roof batten assemblies, too much learning cost is not added to construction, the form presented after construction is completed is not affected, only the photovoltaic cell piece assemblies need to be replaced regularly, and the construction efficiency is improved. And the maintenance cost is low, or the tile units can be conveniently replaced when the tiles are damaged.

Description

Technical Field

[0001] The invention relates to the technical field of photovoltaic buildings, and in particular to a photovoltaic system and an installation method thereof. Background Art

[0002] As the global demand for clean energy grows, the development and utilization of solar energy, as an inexhaustible green energy, has attracted much attention. Photovoltaic tile systems have emerged as the times require. They combine photovoltaic power generation functions with building roof tiles, aiming to achieve building energy self-sufficiency and reduce dependence on traditional power grids.

[0003] In the early days of the construction industry, roofing materials mainly focused on basic functions such as waterproofing and heat insulation. Traditional tiles such as clay tiles and cement tiles can meet basic needs of sheltering from wind and rain, but they have made no contribution to energy utilization. With the development of technology, people have tried to integrate solar panels into buildings. However, the initial forms were mostly simple additional installations, that is, ordinary solar panels were directly fixed on the roof. This brings many disadvantages: on the one hand, the additional panels increase the load-bearing burden of the roof, posing a challenge to the safety of the building structure; on the other hand, this patchwork combination destroys the overall aesthetics of the building. The panels and roof tiles are very different in style and are visually inconsistent.

[0004] Focusing further on the power supply structure, the power supply line layout of the early photovoltaic tile system was chaotic. Due to the lack of system planning, the wires shuttled randomly on the roof, which not only affected the overall cleanliness of the roof, but also easily damaged by the shaking and friction of the wires in windy and rainy weather, causing leakage and power outage risks, threatening personal and building safety. Moreover, the power supply connection nodes are simply designed, mostly using simple plug-in or screw-fastened connections. In long-term outdoor environments, they are easily affected by changes in temperature and humidity, and may become loose, oxidatively corroded, and cause poor contact and unstable power supply, which seriously affects the power transmission efficiency and reduces the reliability of the entire photovoltaic tile system in supplying power to the building. Considering these problems, there is an urgent need for a new, highly integrated, efficient and reliable photovoltaic tile system to fill the gap in existing technologies and meet the market demand for both energy saving and aesthetics in buildings. Summary of the invention

[0005] The purpose of the present invention is to provide a photovoltaic tile system to address the technical defects in the prior art.

[0006] Another object of the present invention is to provide an installation method of the photovoltaic tile system.

[0007] The technical solution adopted to achieve the purpose of the present invention is:

[0008] A photovoltaic tile system comprises a tile bar assembly and a photovoltaic tile module installed on the tile bar assembly. The tile bar assemblies are arranged in sequence for installation on a roof to form multiple columns of tile bar assemblies. Multiple photovoltaic tile modules are overlapped and arranged in sequence between each two adjacent columns of tile bar assemblies. The photovoltaic tile modules on both sides of each column of tile bar assemblies overlap each other to form a photovoltaic tile.

[0009] In the above technical solution, the photovoltaic tile module includes a tile unit, a photovoltaic cell unit and a junction box, and the photovoltaic cell unit is installed on the top of the tile unit;

[0010] The tile unit comprises a tile and a plurality of groove slide rails sequentially and transversely embedded on the top of the tile, a first overlap structure is arranged on two opposite sides of the tile, and a second overlap structure is arranged on the other two opposite sides of the tile;

[0011] The photovoltaic cell unit comprises a pressing sheet, a photovoltaic cell and a sliding sheet which are sequentially installed from top to bottom, the pressing sheet and the sliding sheet are arranged opposite to each other up and down, and each sliding sheet is slidably installed in one of the groove slide rails to slide the photovoltaic cell unit onto the tile unit;

[0012] The junction box is electrically connected to the photovoltaic cells and is located below the tile unit.

[0013] In the above technical solution, vertical through holes are opened on the tiles, and the through holes are used to pass wires, and the wires are used to connect the junction box and the photovoltaic cells. The ends of the power lines of the junction box are respectively equipped with connectors for connecting to an external power source.

[0014] In the above technical solution, the edges on both sides of the photovoltaic cell unit are sealed by means of pressure strips or silicone.

[0015] In the above technical solution, the bottom groove wall of the groove slide rail is connected to the tile through screws and nuts, and a gasket is arranged between the screws and the bottom groove wall of the groove slide rail.

[0016] In the above technical solution, adjacent tiles of the photovoltaic tile modules between two columns of tile bar assemblies are overlapped and arranged through the second overlap structure, and adjacent tiles of the photovoltaic tile modules on both sides of each column of tile bar assemblies are overlapped and arranged through the first overlap structure.

[0017] In the above technical solution, the tile hanging bar assembly includes a tile hanging bar, a connector and a sliding rail connected in sequence, the tile hanging bar is used to be installed on the roof, a sliding clamp is installed at the joint end of the photovoltaic tile module, three metal contacts are installed on the outer surface of the sliding clamp, and three conductive elements are installed along the length direction of the sliding rail, the joint is slidably installed in the sliding rail through the sliding clamp, each metal contact on the sliding clamp is in contact with a conductive element, and the three conductive elements are respectively connected to one of the live wire, the ground wire and the neutral wire.

[0018] In the above technical solution, the connecting member includes a connecting plate and an inserting strip installed on one side of the connecting plate, the other side of the connecting plate is installed on the tile hanging strip, and the inserting strip is inserted into the sliding track to install the sliding track on the tile hanging strip.

[0019] In the above technical solution, an electric wire is installed on one side of the tile hanging strip through silicone and connected to the switch of the sliding track to supply power to the interface. The electric wire is located below the connector and the sliding track, and a switch is installed at its end.

[0020] Another aspect of the present invention also includes the method for installing the photovoltaic tile system, comprising the following steps:

[0021] Step 1, photovoltaic cell unit installation: pass the slide, photovoltaic cell and pressing sheet through the screws from bottom to top, install washers and nuts on both ends of the screws, fasten the slide, photovoltaic cell and pressing sheet together to form a photovoltaic cell unit;

[0022] Step 2, tile unit installation: embed the groove rails on the tiles at intervals horizontally, and screw through the gasket, the bottom groove wall of the groove rails and the tiles from top to bottom in sequence, and fix the lower ends of the screws with nuts to fasten the groove rails and tiles together to form a tile unit;

[0023] Step 3, after the tile hanging strips are installed on the roof at intervals in the longitudinal direction, the tile units are fixed on the tile hanging strips, and the adjacent tile units in the longitudinal direction are overlapped together by the second overlap structure to form multiple columns of tile units, and the adjacent tile units in the transverse direction are overlapped together by the first overlap structure to form multiple rows of tile units, and finally form a photovoltaic tile;

[0024] Step 4, slide the installed photovoltaic cell unit from one end of the groove slide rail into the groove slide rail through the slide at the bottom of the photovoltaic cell unit, so as to install the photovoltaic cell on the tile unit, and seal the opposite ends of the photovoltaic cell unit by pressing blocks or silicone, and place a junction box at the bottom of each tile unit, and connect the junction box to the photovoltaic cell through wires;

[0025] Step 5, installation of tile hanging bar assembly: install the connecting plate of the connector on the tile hanging bar, slide the sliding track from one end of the insert, install the sliding track on the connector, fix the wire on the tile hanging bar with silicone, install the three conductive elements into the sliding track, and then insert the three metal contacts into the sliding track;

[0026] Step 6, the junction boxes under two vertically adjacent tile units are connected in series, and the positive and negative poles of each junction box are connected to a connector through wires. The connector slides into the sliding track through the sliding clamp, and the three metal contacts are in contact with three conductive elements. One of the three conductive elements is connected to the live wire, one is connected to the ground wire, and one is connected to the neutral wire.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. The tiles of the present invention are made of original fired tiles, which can retain the historical and cultural characteristics of the original buildings to the greatest extent, maintain the color, texture, size and other characteristics of the roof of the original buildings, and avoid the excessive impact of new technologies on ancient buildings to a certain extent.

[0029] 2. The photovoltaic tile system of the present invention installs photovoltaic panels on the basis of the overlapping method. At the same time, the design of the tile hanging bar assembly can better install the photovoltaic tile module on the tile hanging bar assembly, which will not add too much learning cost to the construction and will not affect the appearance after the construction is completed. It only needs to replace the photovoltaic cell panel assembly regularly, with low maintenance cost, or when the tile is damaged, the tile unit can be easily replaced. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a usage status diagram of the photovoltaic tile module of Example 1.

[0031] Figure 2 This is a schematic diagram of the structure of the photovoltaic tile module of Example 1.

[0032] Figure 3 This is a side view of the tile unit of Example 1.

[0033] Figure 4 This is an exploded diagram of the tile unit of Example 1.

[0034] Figure 5 This is a schematic diagram of the bottom of the tile unit of Example 1.

[0035] Figure 6 This is a side view of the photovoltaic tile unit of Example 1.

[0036] Figure 7 This is an exploded diagram of the photovoltaic tile unit of Example 1.

[0037] Figure 8 This is a state diagram of the photovoltaic tile module used in Example 1.

[0038] Figure 9 This is a schematic diagram of the structure of the photovoltaic tile system of Example 2.

[0039] Figure 10 This is a schematic diagram of the structure of the photovoltaic tile system of Example 2.

[0040] Figure 11 This is a schematic diagram of the structure of the tile hanging strip assembly and joints of Example 2.

[0041] Figure 12 This is a schematic diagram of the structure of the tile hanging strip assembly and joints of Example 2.

[0042] Figure 13 This is a schematic diagram of the structure of the tile hanging strip assembly and joints of Example 2.

[0043] Among them, 1: tile unit, 1.1: tile, 1.2: groove slide rail, 1.3: first lap groove, 1.4: first lap plate, 1.5: second lap groove, 1.6: second lap plate, 1.7: through hole, 2: photovoltaic cell unit, 2.1: pressing sheet, 2.2: photovoltaic cell, 2.3: sliding sheet, 3: junction box, 4: pressing strip, 5: connector, 6: sliding clamp, 7: metal contact, 8: tile hanging bar assembly, 8.1: tile hanging bar, 8.2: connecting piece, 8.21: connecting plate, 8.22: insert strip, 8.3: sliding track, 8.4: copper bar, 8.5: plastic shell, 9: wire, 10: switch. DETAILED DESCRIPTION

[0044] The present invention is further described in detail below in conjunction with specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0045] Example 1

[0046] like Figures 1 - 13 As shown, a photovoltaic tile system includes a tile bar assembly 8 and a photovoltaic tile module installed on the tile bar assembly 8. The tile bar assembly 8 is arranged in sequence for installation on a roof to form multiple columns of tile bar assemblies 8. Multiple photovoltaic tile modules are arranged in sequence in a lapped manner between each two adjacent columns of tile bar assemblies 8. The tiles 1.1 of the photovoltaic tile modules on both sides of each column of tile bar assemblies 8 are overlapped with each other, and finally form a photovoltaic tile. Furthermore, the adjacent tiles 1.1 of the photovoltaic tile modules between the two columns of tile bar assemblies 8 are overlapped and arranged by a second overlap structure, and the adjacent tiles 1.1 of the photovoltaic tile modules on both sides of each column of tile bar assemblies 8 are overlapped and arranged by a first overlap structure.

[0047] like Figures 10 - 13As shown, the tile-hanging strip assembly 8 comprises a tile-hanging strip 8.1, a connector 8.2 and a sliding track 8.3 connected in sequence, the bottom surface of the tile-hanging strip 8.1 is installed on the roof, the connector 8.2 comprises a connecting plate 8.21 and an inserting strip 8.22 installed on one side of the connecting plate 8.21, the other side of the connecting plate 8.21 is installed on the tile-hanging strip 8.1, and the inserting strip 8.22 is inserted into the sliding track 8.3 to install the sliding track 8.3 on the tile-hanging strip 8.1; a sliding clamp 6 is installed at the end of the joint 5 of the photovoltaic tile module, and three sliding clamps are installed at intervals on the outer surface of the sliding clamp 6. The metal contact 7 is provided with three copper strips 8.4 (conducting elements) along the length direction of the sliding track 8.3. The connector 5 is slidably installed in the sliding track 8.3 through the sliding clamp 6. Each metal contact 7 on the sliding clamp 6 is in contact with a copper strip 8.4. The three copper strips 8.4 are respectively connected to one of the live wire, the ground wire and the neutral wire (that is, one copper strip 8.4 is connected to the live wire, another copper strip 8.4 is connected to the ground wire, and the third copper strip 8.4 is connected to the neutral wire). The copper strip 8.4 is wrapped in a plastic shell 8.5 and installed in the sliding track 8.3, and one side of the opening is connected to the metal contact 7.

[0048] Furthermore, an electric wire 9 is installed on one side of the tile hanging bar 8.1 through silicone, and the electric wire 9 is located below the connecting piece 8.2 and the sliding track 8.3. A switch 10 is installed at the end of the electric wire 9 to supply power to the interface.

[0049] The photovoltaic tile module includes a tile unit 1, a photovoltaic cell unit 2 and a junction box 3. The photovoltaic cell unit 2 is installed on the top of the tile unit 1. The opposite side edges of the photovoltaic cell unit 2 are sealed by a pressure strip 4 or silicone. The junction box 3 is electrically connected to the photovoltaic cell unit 2 and is located at the bottom of the tile unit 1.

[0050] Specifically, Figures 2 - 4 As shown, the tile unit 1 includes a tile 1.1 (a flat tile in this embodiment) and three groove slide rails 1.2 embedded in the top of the tile 1.1 in sequence along the length direction of the tile, the bottom groove wall of the groove slide rail 1.2 is connected to the tile 1.1 by screws and nuts, and a gasket is arranged between the screws and the bottom groove wall of the groove slide rail 1.2, and first overlapping structures matching each other are arranged on opposite sides of the length direction of the tile 1.1, which are used for overlapping between adjacent tile units 1 along the length direction of the tile 1.1. In this embodiment, the first overlapping structure is a first overlapping groove 1.3 opening upward and a first overlapping plate 1.4 protruding downward, and second overlapping structures matching each other are arranged on opposite sides of the tile 1.1 along the width direction of the tile 1.1, which are used for overlapping between adjacent tile units 1 along the width direction of the tile 1.1, and the second overlapping structure is a second overlapping groove 1.5 opening upward and a second overlapping plate 1.6 protruding downward.

[0051] Specifically, Figures 5 - 6 As shown, the photovoltaic cell unit 2 includes a pressing plate 2.1, a photovoltaic cell 2.2 and a sliding plate 2.3 which are arranged in sequence from top to bottom and assembled together by screws and nuts. The pressing plate 2.1 and the sliding plate 2.3 are arranged relatively to each other up and down. In this embodiment, a pressing plate 2.1 and a sliding plate 2.3 are respectively arranged on the opposite sides and the middle position of the photovoltaic cell 2.2. The sliding plate 2.3 is slidably installed in the groove slide rail 1.2 to slide the photovoltaic cell unit 2 on the tile unit 1.

[0052] Further, such as Figure 8 As shown, a vertical through hole 1.7 is opened on the tile 1.1, and the through hole 1.7 is used to pass the wires, and the two ends of the wires are respectively connected to the junction box 3 and the photovoltaic cell 2.2. A connector 5 is installed at the end of the power line of the junction box 3, and the connector 5 is used to connect to an external power supply. The connector 5 is passed through the tile hanging bar assembly 8, and two adjacent junction boxes 3 along the width direction of the tile 1.1 are connected in series, that is, the junction boxes 3 of every two photovoltaic tile modules along the width direction of the tile 1.1 are connected in series.

[0053] Example 2

[0054] like Figures 1 - 13 As shown, this embodiment provides a method for installing the photovoltaic tile system described in Embodiment 1, comprising the following steps:

[0055] Step 1, installation of photovoltaic cell unit 2: pass the slide 2.3, photovoltaic cell 2.2 and pressing sheet 2.1 through the screws from bottom to top, install washers and nuts at both ends of the screws, and fasten the slide 2.3, photovoltaic cell 2.2 and pressing sheet 2.1 together to form a photovoltaic cell unit 2;

[0056] Step 2, installation of tile unit 1: embed three groove rails 1.2 on tile 1.1 at intervals in the horizontal direction, and screw through the gasket, the bottom groove wall of the groove rail 1.2 and tile 1.1 from top to bottom in sequence, and fix the lower end of the screw with a nut to fasten the groove rail 1.2 and tile 1.1 together to form tile unit 1;

[0057] Step 3, after the tile hanging strips 8.1 (and the water-following strips) are installed on the roof at intervals in the longitudinal direction, the tile units 1 are fixed on the tile hanging strips 8.1 with iron wires, and the adjacent tile units 1 in the longitudinal direction are overlapped together through the second overlap grooves 1.5 and the second overlap plates 1.6 to form multiple columns of tile units 1, and the adjacent tile units 1 in the transverse direction are overlapped together through the first overlap grooves 1.3 and the first overlap plates 1.4 to form multiple rows of tile units 1, and finally form a photovoltaic tile;

[0058] Step 4, slide the installed photovoltaic cell unit 2 from one end of the groove slide rail 1.2 into the groove slide rail 1.2 through the slide 2.3 at the bottom thereof, so as to install the photovoltaic cell 2.2 on the tile unit 1. The opposite lateral ends of the photovoltaic cell unit 2 are sealed by a pressure strip 4 or silicone, and a junction box 3 is placed at the bottom of each tile unit 1. The output end of the junction box 3 is connected to the photovoltaic cell 2.2 by passing the wire through the through hole 1.7 on the tile 1.1.

[0059] Step 5, installation of the tile hanging bar assembly 8: install the connecting plate 8.21 of the connecting piece 8.2 on the tile hanging bar 8.1, slide the sliding track 8.3 from one end of the inserting strip 8.22, wear the sliding track 8.3 on the connecting piece 8.2, fix the wire on the tile hanging bar 8.1 with silicone, install the three copper bars into the sliding track 8.3, and then insert the three metal contacts 7 into the sliding track 8.3 at the upper, middle and lower positions.

[0060] Step 6, the junction boxes 3 under two longitudinally adjacent tile units 1 are connected in series, and the input end of each junction box 3 is connected to a connector 5 through an electric wire. The connector 5 slides into the sliding track 8.3 through the sliding clamp 6. The three metal contacts 7 are in contact with the three copper strips 8.4. One of the three copper strips 8.4 is connected to the live wire, one is connected to the ground wire, and one is connected to the neutral wire.

[0061] The above is only a preferred embodiment of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A photovoltaic tile system, characterized in that: It includes a tile hanging bar assembly and a photovoltaic tile module installed on the tile hanging bar assembly. The tile hanging bar assembly is arranged in sequence for installation on the roof to form multiple columns of tile hanging bar assemblies. Multiple photovoltaic tile modules are overlapped and arranged in sequence between each two adjacent columns of tile hanging bar assemblies. The photovoltaic tile modules on both sides of each column of tile hanging bar assemblies are overlapped with each other to form a photovoltaic tile.

2. The photovoltaic tile system according to claim 1, characterized in that: The photovoltaic tile module comprises a tile unit, a photovoltaic cell unit and a junction box, and the photovoltaic cell unit is installed on the top of the tile unit; The tile unit comprises a tile and a plurality of groove slide rails sequentially and transversely embedded on the top of the tile, a first overlap structure is arranged on two opposite sides of the tile, and a second overlap structure is arranged on the other two opposite sides of the tile; The photovoltaic cell unit comprises a pressing sheet, a photovoltaic cell and a sliding sheet which are sequentially installed from top to bottom, the pressing sheet and the sliding sheet are arranged opposite to each other up and down, and each sliding sheet is slidably installed in one of the groove slide rails to slide the photovoltaic cell unit onto the tile unit; The junction box is electrically connected to the photovoltaic cells and is located below the tile unit.

3. The photovoltaic tile system according to claim 2, characterized in that: A vertical through hole is provided on the tile, and the through hole is used for passing electric wires, and the electric wires are used for connecting the junction box and the photovoltaic cell sheet. The ends of the power lines of the junction box are respectively provided with connectors for connecting to an external power source.

4. The photovoltaic tile system according to claim 2, characterized in that: The opposite side edges of the photovoltaic cell unit are sealed by means of pressure strips or silica gel.

5. The photovoltaic tile system according to claim 2, characterized in that: The bottom groove wall of the groove slide rail is connected to the tile through screws and nuts, and a gasket is arranged between the screws and the bottom groove wall of the groove slide rail.

6. The photovoltaic tile system according to claim 2, characterized in that: Adjacent tiles of the photovoltaic tile modules between two columns of tile bar assemblies are overlapped and arranged through the second overlap structure, and adjacent tiles of the photovoltaic tile modules on both sides of each column of tile bar assemblies are overlapped and arranged through the first overlap structure.

7. The photovoltaic tile system according to claim 3, characterized in that: The tile hanging bar assembly includes a tile hanging bar, a connector and a sliding rail connected in sequence. The tile hanging bar is used to be installed on the roof. A sliding clamp is installed at the joint end of the photovoltaic tile module, three metal contacts are installed on the outer surface of the sliding clamp, and three conductive elements are installed along the length direction of the sliding rail. The joint is slidably installed in the sliding rail through the sliding clamp, and each metal contact on the sliding clamp is in contact with a conductive element. The three conductive elements are respectively connected to one of the live wire, the ground wire and the neutral wire.

8. The photovoltaic tile system according to claim 7, characterized in that: The connecting piece comprises a connecting plate and an inserting strip installed on one side of the connecting plate, the other side of the connecting plate is installed on the tile hanging strip, and the inserting strip is inserted into the sliding track to install the sliding track on the tile hanging strip.

9. The photovoltaic tile system according to claim 7, characterized in that: An electric wire is installed on one side of the tile hanging strip through silicone and connected to the switch of the sliding track to supply power to the interface. The electric wire is located below the connector and the sliding track, and a switch is installed at the end of the electric wire.

10. The method for installing a photovoltaic tile system according to any one of claims 2 to 9, characterized in that: The following steps are involved: Step 1, photovoltaic cell unit installation: pass the slide, photovoltaic cell and pressing sheet through the screws from bottom to top, install washers and nuts on both ends of the screws, fasten the slide, photovoltaic cell and pressing sheet together to form a photovoltaic cell unit; Step 2, tile unit installation: embed the groove rails on the tiles at intervals horizontally, and screw through the gasket, the bottom groove wall of the groove rails and the tiles from top to bottom in sequence, and fix the lower ends of the screws with nuts to fasten the groove rails and tiles together to form a tile unit; Step 3, after the tile hanging strips are installed on the roof at intervals in the longitudinal direction, the tile units are fixed on the tile hanging strips, and the adjacent tile units in the longitudinal direction are overlapped together by the second overlap structure to form multiple columns of tile units, and the adjacent tile units in the transverse direction are overlapped together by the first overlap structure to form multiple rows of tile units, and finally form a photovoltaic tile; Step 4, slide the installed photovoltaic cell unit from one end of the groove slide rail into the groove slide rail through the slide at the bottom of the photovoltaic cell unit, so as to install the photovoltaic cell on the tile unit, and seal the opposite ends of the photovoltaic cell unit by pressing blocks or silicone, and place a junction box at the bottom of each tile unit, and connect the junction box to the photovoltaic cell through wires; Step 5, installation of tile hanging bar assembly: install the connecting plate of the connector on the tile hanging bar, slide the sliding track from one end of the insert, install the sliding track on the connector, fix the wire on the tile hanging bar with silicone, install the three conductive elements into the sliding track, and then insert the three metal contacts into the sliding track; Step 6, the junction boxes under two vertically adjacent tile units are connected in series, and the positive and negative poles of each junction box are connected to a connector through wires. The connector slides into the sliding track through the sliding clamp, and the three metal contacts are in contact with three conductive elements. One of the three conductive elements is connected to the live wire, one is connected to the ground wire, and one is connected to the neutral wire.

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