A three-phase current sensor mounting structure of a switchgear

Abstract

This invention discloses a three-phase current sensor mounting structure for a switch cabinet, belonging to the field of three-phase current sensors. It includes a switch cabinet with a movably mounted door on its side. A hinge is fixedly mounted on the door and movably mounted to the switch cabinet via the hinge. A lock is movably mounted on one side of the door. A bracket is fixedly mounted inside the switch cabinet, and a mounting frame is fixedly mounted on the bracket. Bolts are movably mounted at both ends of the mounting frame and are fixed to the bracket via these bolts. The fixed mechanism makes the locking blocks more wear-resistant and durable, and the fixing mechanism more durable. The fixing effect between the locking blocks and the mounting frame can be adjusted using an adjusting plate and other structures, allowing for flexible and convenient adjustment of the tightness after installation. An anti-detachment structure transfers the pulling force on the connecting wires to the anti-detachment rod, preventing the wire ends in the wiring holes from being pulled and falling out.

Description

Technical Field

[0001] This invention relates to the field of installation structure technology, and in particular to a three-phase current sensor installation structure for switchgear. Background Technology

[0002] A current sensor is a detection device that can sense the information of the measured current and transform the sensed information into an electrical signal or other required form of information output that meets certain standards, so as to meet the requirements of information transmission, processing, storage, display, recording and control.

[0003] The three-phase current sensor is installed on the mounting bracket of the switch cabinet. The current sensor is installed by snapping into the mounting bracket through the slot on the back. However, after repeated installations, the slot is prone to wear, which reduces the fixing performance of the three-phase current sensor.

[0004] The three-phase current sensor is mainly connected to the outside via wiring terminals. When there are many electrical components in the switch cabinet, the wires need to be bundled together to keep the wiring organized. This makes the wiring of the three-phase current sensor easily pulled by the wiring of other electrical components, causing the wire ends to come loose and resulting in poor contact. Summary of the Invention

[0005] The main objective of this invention is to provide a three-phase current sensor mounting structure for switchgear, thereby solving the problems in the background art.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] A three-phase current sensor mounting structure for a switch cabinet includes a switch cabinet, within which a mounting bracket for fixing a three-phase sensor is provided. A slot is fixedly installed on the back of the three-phase sensor, and the three-phase sensor is engaged with the mounting bracket via the slot. The characteristic feature is that a fixing mechanism is provided on one side of the three-phase sensor. This fixing mechanism uses a telescopically movable locking block to fix the three-phase sensor to the mounting bracket, reducing wear during installation through the telescopic movement of the locking block. Several wiring holes are fixedly installed on the upper and lower parts of the three-phase sensor, and an anti-detachment mechanism is fixedly installed on the side of the three-phase sensor located at the wiring holes.

[0008] Preferably, the fixing mechanism includes: a first movable slot, a locking block, a first movable rod, an adjusting plate, a mounting plate, a first screw, an anti-detachment shell, and a first spring. A first movable slot is provided above and below the locking slot. The locking block is movably installed within the first movable slot. One end of the first movable rod is fixedly installed above the locking block. The adjusting plate is movably installed on the first movable rod. The mounting plate is also movably installed on the first movable rod and is located above the adjusting plate. The first screw is movably installed in the middle of the mounting plate. The anti-detachment shell is fixedly installed in the middle of the adjusting plate. One end of the first screw is movably installed within the anti-detachment shell. The first spring is movably installed on the first movable rod and is located between the locking block and the adjusting plate.

[0009] Preferably, the fixing mechanism further includes a second bolt, and the three-phase sensor has screw holes fixedly installed on both sides of the first movable slot, and the mounting plate has through holes fixedly installed on both sides, and the second bolt is fixedly installed in the through holes of the mounting plate and the screw holes of the three-phase sensor.

[0010] Preferably, the fixing mechanism further includes a connecting frame and a mounting platform. Two movable rods are fixedly installed on each of the locking blocks. The connecting frame is installed at the other end of the two movable rods. The mounting platform is fixedly installed in the middle of the mounting plate. A screw hole is fixedly opened in the mounting platform, and the screw rod is movably installed in the screw hole of the mounting platform.

[0011] Preferably, the fixing mechanism further includes a rotating platform, which is fixedly installed at one end of the first screw and movably installed inside the anti-detachment shell. The anti-detachment shell has a through hole corresponding to the position of the first screw, and the first screw passes through the through hole of the anti-detachment shell to enter the interior.

[0012] Preferably, the anti-detachment mechanism includes: an anti-detachment groove, an anti-detachment rod, a baffle, and a housing. The anti-detachment groove is fixedly installed above or below the wiring hole, the anti-detachment rod is fixedly installed in the anti-detachment groove, the baffle is fixedly installed at one end of the anti-detachment rod, and the housing is movably installed on the anti-detachment rod.

[0013] Preferably, the anti-detachment mechanism further includes a limiting strip and a second movable groove. There are two limiting strips, which are fixedly installed at the upper and lower ends of one side of the anti-detachment rod. The second movable groove is fixedly installed at the center of the bottom surface of the casing. The anti-detachment rod and the limiting strip are movably installed in the second movable groove of the casing.

[0014] Preferably, the anti-detachment mechanism further includes a first groove and a second groove, wherein the first groove is fixedly installed on the upper and lower surfaces of the casing, and the second groove is fixedly installed on the upper and lower surfaces of the baffle.

[0015] Preferably, the anti-detachment mechanism further includes a second spring, the other end of the anti-detachment rod is fixedly installed to the bottom surface of the anti-detachment groove, and the second spring is located on the anti-detachment rod and between the bottom surface of the sleeve and the anti-detachment groove.

[0016] Preferably, the switch cabinet (1) is further provided with: a cabinet door (2) is movably installed on the side of the switch cabinet (1); a hinge (3) is fixedly installed on the cabinet door (2) and is movably installed with the switch cabinet (1) via the hinge (3); a lock (4) is movably installed on one side of the cabinet door (2); a bracket (5) is fixedly installed inside the switch cabinet (1); a mounting bracket (6) is fixedly installed on the bracket (5); bolts (8) are movably installed at both ends of the mounting bracket (6) and are fixedly installed with the bracket (5) via bolts (8); and a three-phase sensor (7) is fixedly installed on the mounting bracket (6).

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The three-phase sensor is fixedly installed on the mounting bracket by means of a telescopic and movable locking block. The telescopic movement of the locking block reduces the wear and tear during the installation process, making the fixing mechanism more durable.

[0019] By using the adjustable plate and screw No. 1, the adjustable plate can be moved inward. By compressing the spring No. 1, the pressure on the locking block increases, thus improving the fixing effect between the locking block and the mounting bracket. This allows the fixing degree between the three-phase current sensor and the mounting bracket to be adjusted flexibly, making it easier for users to adjust the fixing degree of the three-phase current sensor according to the existing situation. The installation is more flexible and the fixing effect is better.

[0020] By using an anti-detachment structure, the connecting wire is fixedly wrapped around the anti-detachment rod, which then bears the pulling force when the wire is pulled, making the connection between the connecting wire and the wiring hole less likely to come off. The sleeve and baffle restrict the positions of both ends of the connecting wire through slot 1 and slot 2, making it less likely for the connecting wire on the anti-detachment rod to loosen and come off. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of a three-phase current sensor mounting structure for a switchgear according to the present invention.

[0022] Figure 2 This is a schematic diagram of the structure of a three-phase current sensor mounting structure for a switchgear according to the present invention, showing the three-phase sensor mounted on a mounting bracket.

[0023] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0024] Figure 4 A schematic diagram of the fixing mechanism for a three-phase current sensor mounting structure in a switchgear for invention;

[0025] Figure 5 This is a schematic diagram of the No. 1 screw and the anti-detachment structure of the three-phase current sensor mounting structure of the switchgear according to the present invention.

[0026] Figure 6 This is a schematic diagram of the anti-disconnection mechanism of a three-phase current sensor mounting structure for a switchgear according to the present invention;

[0027] Figure 7 This is a schematic diagram of the housing of a three-phase current sensor mounting structure for a switchgear according to the present invention.

[0028] In the diagram: 1. Switch cabinet; 2. Cabinet door; 3. Hinge; 4. Lock; 5. Bracket; 6. Mounting bracket; 7. Three-phase sensor; 8. Bolt No. 1; 9. Slot; 10. Fixing mechanism; 1001. Movable slot No. 1; 1002. Locking block; 1003. Movable rod No. 1; 1004. Connecting bracket; 1005. Adjusting plate; 1006. Mounting plate; 1007. Bolt No. 2; 1008. Screw No. 1 1009. Rod; 1010. Mounting platform; 1011. Rotating platform; 1012. Anti-detachment shell; 1013. Spring No. 1; 11. Wiring hole; 12. Anti-detachment mechanism; 1201. Anti-detachment groove; 1202. Anti-detachment rod; 1203. Limiting strip; 1204. Baffle; 1205. Sleeve; 1206. Spring No. 2; 1207. Cable groove No. 1; 1208. Cable groove No. 2; 1209. Movable groove No. 2. Detailed Implementation

[0029] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0030] like Figure 1-7 As shown, a three-phase current sensor mounting structure for a switch cabinet includes a switch cabinet 1. A cabinet door 2 is movably mounted on the side of the switch cabinet 1. A hinge 3 is fixedly mounted on one side of the cabinet door 2 and is movably mounted to the switch cabinet 1 through the hinge 3. A lock 4 is movably mounted on the other side of the cabinet door 2. A bracket 5 is fixedly mounted inside the switch cabinet 1. A mounting bracket 6 is mounted on the bracket 5. Bolts 8 are movably mounted at both ends of the mounting bracket 6 and are fixedly mounted to the bracket 5 through the bolts 8. A three-phase sensor 7 is fixedly mounted on the mounting bracket 6. A slot 9 is fixedly mounted on the back of the three-phase sensor 7 and is engaged with the mounting bracket 6 through the slot 9.

[0031] In a further preferred embodiment of the present invention, a fixing mechanism 10 is provided on one side of the three-phase sensor 7. The fixing mechanism 10 includes a first movable slot 1001, a locking block 1002, a first movable rod 1003, an adjusting plate 1005, a mounting plate 1006, a first screw 1008, an anti-detachment shell 1011, and a first spring 1012. The first movable slot 1001 is fixedly installed above and below the locking slot 9, and the locking block 1002 is movably installed in the first movable slot 1005. Inside, one end of the first movable rod 1003 is fixedly installed above the locking block 1002. The adjusting plate 1005 is movably installed on the first movable rod 1003. The mounting plate 1006 is also movably installed on the first movable rod 1003, located above the adjusting plate 1005. The first screw 1008 is movably installed in the middle of the mounting plate 1006. The anti-detachment shell 1011 is fixedly installed in the middle of the adjusting plate 1005. One end of the first screw 1008... The end is movably installed inside the anti-detachment housing 1011; the first spring 1012 is movably installed on the first movable rod 1003 and is located between the locking block 1002 and the adjusting plate 1005; the fixing mechanism 10 also includes a second bolt 1007; the three-phase sensor 7 has screw holes fixedly installed on both sides of the first movable slot 1001, and through holes fixedly installed on both sides of the mounting plate 1006, and the second bolt 1007 is fixedly installed in the through holes of the mounting plate 1006 and... The three-phase sensor 7 is inside the screw hole; the fixing mechanism 10 also includes a connecting frame 1004 and a mounting platform 1009. Two first movable rods 1003 are fixedly installed on each locking block 1002. The connecting frame 1004 is installed at the other end of the two first movable rods 1003. The mounting platform 1009 is fixedly installed in the middle of the mounting plate 1006. A screw hole is fixedly opened in the mounting platform 1009. The first screw 1008 is movably installed in the screw hole of the mounting platform 1009.The fixing mechanism 10 also includes a rotating platform 1010, which is fixedly installed at one end of the first screw 1008 and movably installed inside the anti-detachment housing 1011. The anti-detachment housing 1011 has a through hole corresponding to the position of the first screw 1008. The first screw 1008 passes through the through hole of the anti-detachment housing 1011 and enters the interior. The anti-detachment housing 1011 is a circular shell with an open bottom and a through hole at the top. The function of the anti-detachment housing 1011 is to prevent the rotating platform 1010 from detaching from the adjusting plate 1005, allowing the first screw 1008 to move the adjusting plate 1005 up and down, pulling the connecting bracket 1004 and causing the first movable rod 1003 and its lower locking block 1002 to move upwards, retracting the locking block 1002 into the first movable slot 1001. The first spring 1012 is compressed, installing the slot 9 and the mounting bracket 6. This mechanism is easier to install, and... During installation, wear on the locking block 1002 is minimal. Loosening the connecting bracket 1004 resets the first spring 1012, causing the locking block 1002 to move outward and lock onto the mounting bracket 6, thus securing the three-phase sensor 7 to the mounting bracket 6. This structure utilizes the reverse pressure exerted by the compressed first spring 1012 on the locking block 1002 to achieve a secure connection. Rotating the first screw 1008 causes the adjusting plate 1005 to move upward to release the first spring 1012 or downward to compress it, allowing for a more flexible or tighter fit between the locking block 1002 and the mounting bracket 6. This allows for adjustable fixation of the three-phase sensor 7 to the mounting bracket 6. Furthermore, the presence of the first spring 1012 allows the locking block 1002 to move inward under pressure, resulting in less wear and tear on both the locking block 1002 and the mounting bracket 6 when the three-phase sensor 7 is removed from the mounting bracket 6, thus enhancing durability.

[0032] In a further preferred embodiment of the present invention, a plurality of wiring holes 11 are fixedly installed on the upper and lower parts of the three-phase sensor 7. An anti-detachment mechanism 12 is fixedly installed on the three-phase sensor 7 on the side of the wiring holes 11. The anti-detachment mechanism 12 includes an anti-detachment groove 1201, an anti-detachment rod 1202, a baffle 1204, and a housing 1205. The anti-detachment groove 1201 is fixedly installed above or below the wiring holes 11. The anti-detachment rod 1202 is fixedly installed in the anti-detachment groove 1201. The baffle 1204 is fixedly installed at one end of the anti-detachment rod 1202. The housing 1205 is movably installed on the anti-detachment rod 1202. The anti-detachment mechanism 12 also includes a limiting strip 1203 and a second movable groove 1209. The number of limiting strips 1203 is two, and... The anti-detachment mechanism 12 is fixedly installed at the upper and lower ends of one side of the anti-detachment rod 1202. The second movable groove 1209 is fixedly installed at the center of the bottom surface of the housing 1205. The anti-detachment rod 1202 and the limiting strip 1203 are movably installed in the second movable groove 1209 of the housing 1205. The anti-detachment mechanism 12 also includes a first wire groove 1207 and a second wire groove 1208. The first wire groove 1207 is fixedly installed on the upper and lower surfaces of the housing 1205, and the second wire groove 1208 is fixedly installed on the upper and lower surfaces of the baffle 1204. The anti-detachment mechanism 12 also includes a second spring 1206. The other end of the anti-detachment rod 1202 is fixedly installed to the bottom surface of the anti-detachment groove 1201. The second spring 1206 is located on the anti-detachment rod 1202 and is located between the housing 1205 and the... Between the bottom surfaces of the anti-detachment groove 1201, the sleeve 1205 moves within the anti-detachment groove 1201. An annular stop is provided on the outer side of the sleeve 1205 to prevent it from completely entering the anti-detachment groove 1201. The sleeve 1205 moves on the anti-detachment rod 1202 via the second movable groove 1209. The limiting strip 1203 and the second movable groove 1209 are mutually installed, ensuring that the sleeve 1205 does not shift during movement, and that the centers of the first wire groove 1207 and the second wire groove 1208 remain on the same straight line. Subsequently, the connecting wire is inserted into the first wire groove 1207 or the second wire groove 1208, thus securing the incoming and outgoing wires through the first wire groove 1207 or the second wire groove 1208. To prevent the connecting wires on the anti-detachment rod 1202 from loosening and falling off, rotate the connecting wires around the anti-detachment rod 1202 several times to secure them. After securing them, cover the connecting wires with the sleeve 1205. Then, insert the inlet and outlet sides of the connecting wires into the second wire groove 1208 of the baffle 1204 or the first wire groove 1207 of the sleeve 1205. Secure the connecting wires with the first wire groove 1207 and the second wire groove 1208 to prevent them from loosening and to keep them securely wrapped around the anti-detachment rod 1202. This ensures that when the wires are pulled by external force, the anti-detachment rod 1202 is subjected to a pulling force, preventing the connecting wires in the wiring hole 11 from being pulled and falling off.

[0033] Working principle: During installation, pulling the connecting bracket 1004 causes the first movable rod 1003 to move the locking block 1002 inward, allowing the locking block 1002 to move into the first movable slot 1001. The first spring 1012 is compressed by the moving locking block 1002, facilitating the installation of the slot 9 and the mounting bracket 6. Then, releasing the connecting bracket 1004 allows the compressed first spring 1012 to reset, pushing the locking block 1002 out of the first movable slot 1001, thus fixing the mounting bracket 6. This ensures the three-phase sensor 7 is securely mounted on the mounting bracket 6, making the installation more stable. Furthermore, rotating the first screw 10... 08, causing the rotating platform 1010 at the lower end of the first screw 1008 to move upward or downward, thereby driving the adjusting plate 1005 to release the first spring 1012 upward or compress the first spring 1012 downward. This causes the locking block 1002 below the first spring 1012 to be subjected to force, making the installation degree between it and the mounting bracket 6 more loose or more secure. This allows for the adjustment of the installation and fixation degree between the three-phase sensor 7 and the mounting bracket 6. Due to the presence of the first spring 1012, the locking block 1002 will move inward after being subjected to force, thereby compressing the first spring 1012. When the three-phase sensor 7 is pulled out of the mounting bracket 6, the locking block 1002... 02 experiences less wear and tear on the mounting bracket 6, making it more durable. Through the anti-detachment mechanism 12, the housing 1205 moves towards the anti-detachment groove 1201, compressing the second spring 1206. This causes the housing 1205 to move along the anti-detachment rod 1202 via the second movable groove 1209. Due to the mutual movable installation of the limiting strip 1203 and the second movable groove 1209, the housing 1205 will not shift during movement, thus keeping the centers of the first wire groove 1207 and the second wire groove 1208 on the same straight line. Then, the connecting wire is rotated several times around the anti-detachment rod 1202, winding the connecting wire around the anti-detachment rod 1202. 2. Release the housing 1205 so that the housing 1205 resumes its movement under the action of the reset second spring 1206, so that the housing 1205 closes with the baffle 1204 again. Then, insert the inlet and outlet sides of the connecting wire into the second wire groove 1208 of the baffle 1204 or the first wire groove 1207 of the housing 1205. The connecting wire is fixed by the first wire groove 1207 and the second wire groove 1208 to prevent the wire from coming loose from being wrapped around the anti-detachment rod 1202. When the wire is pulled by an external force, the anti-detachment rod 1202 is subjected to a pulling force to prevent the wire end of the connecting wire in the wiring hole 11 from being pulled and causing it to fall off.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A three-phase current sensor mounting structure for a switch cabinet, comprising a switch cabinet (1), wherein the switch cabinet (1) is provided with a mounting bracket (6) for fixing a three-phase sensor (7), and a slot (9) is fixedly mounted on the back of the three-phase sensor (7), wherein the three-phase sensor (7) is engaged with the mounting bracket (6) through the slot (9), characterized in that: A fixing mechanism (10) is provided on one side of the three-phase sensor (7). The fixing mechanism uses a telescopically movable locking block to fix the three-phase sensor (7) to the mounting bracket (6). The telescopic movement of the locking block reduces the wear of the locking block during installation. Several wiring holes (11) are fixedly installed on the upper and lower parts of the three-phase sensor (7). An anti-detachment mechanism (12) is fixedly installed on the side of the three-phase sensor (7) located at the wiring holes (11). The fixing mechanism (10) includes: a first movable slot (1001), a locking block (1002), a first movable rod (1003), an adjusting plate (1005), a mounting plate (1006), a first screw (1008), an anti-detachment shell (1011), and a first spring (1012). A first movable slot (1001) is provided above and below the locking slot (9). The locking block (1002) is movably installed in the first movable slot (1001). One end of the first movable rod (1003) is fixedly installed above the locking block (1002). The adjusting plate (1005) is movably installed in the first movable slot (1001). On the moving rod (1003), the mounting plate (1006) is also movably mounted on the first moving rod (1003) and located above the adjusting plate (1005). The first screw (1008) is movably mounted in the middle of the mounting plate (1006). The anti-detachment shell (1011) is fixedly mounted in the middle of the adjusting plate (1005). One end of the first screw (1008) is movably mounted inside the anti-detachment shell (1011). The first spring (1012) is movably mounted on the first moving rod (1003) and located between the locking block (1002) and the adjusting plate (1005). The anti-detachment mechanism (12) includes: an anti-detachment groove (1201), an anti-detachment rod (1202), a baffle (1204), and a housing (1205). The anti-detachment groove (1201) is fixedly installed above or below the wiring hole (11). The anti-detachment rod (1202) is fixedly installed in the anti-detachment groove (1201). The baffle (1204) is fixedly installed at one end of the anti-detachment rod (1202). The housing (1205) is movably installed on the anti-detachment rod (1202).

2. The three-phase current sensor mounting structure for a switchgear according to claim 1, characterized in that: The fixing mechanism (10) also includes a second bolt (1007), and the three-phase sensor (7) has screw holes fixedly installed on both sides of the first movable slot (1001). The mounting plate (1006) has through holes fixedly installed on both sides, and the second bolt (1007) is fixedly installed in the through holes of the mounting plate (1006) and the screw holes of the three-phase sensor (7).

3. The three-phase current sensor mounting structure for a switchgear according to claim 2, characterized in that: The fixing mechanism (10) also includes a connecting frame (1004) and a mounting platform (1009). Two first movable rods (1003) are fixedly installed on each of the locking blocks (1002). The connecting frame (1004) is installed at the other end of the two first movable rods (1003). The mounting platform (1009) is fixedly installed in the middle of the mounting plate (1006). A screw hole is fixedly opened in the mounting platform (1009). The first screw (1008) is movably installed in the screw hole of the mounting platform (1009).

4. The three-phase current sensor mounting structure for a switchgear according to claim 3, characterized in that: The fixing mechanism (10) also includes a rotating platform (1010), which is fixedly installed at one end of the first screw (1008) and is movably installed inside the anti-detachment shell (1011). The anti-detachment shell (1011) has a through hole corresponding to the position of the first screw (1008), and the first screw (1008) passes through the through hole of the anti-detachment shell (1011) and enters the interior.

5. The three-phase current sensor mounting structure for a switchgear according to claim 1, characterized in that: The anti-detachment mechanism (12) also includes a limiting strip (1203) and a second movable groove (1209). There are two limiting strips (1203), which are fixedly installed at the upper and lower ends of one side of the anti-detachment rod (1202). The second movable groove (1209) is fixedly installed at the center of the bottom surface of the casing (1205). The anti-detachment rod (1202) and the limiting strip (1203) are movably installed in the second movable groove (1209) of the casing (1205).

6. The three-phase current sensor mounting structure for a switchgear according to claim 5, characterized in that: The anti-detachment mechanism (12) also includes a first wire groove (1207) and a second wire groove (1208). The first wire groove (1207) is fixedly installed on the top and bottom of the casing (1205), and the second wire groove (1208) is fixedly installed on the top and bottom of the baffle (1204).

7. The three-phase current sensor mounting structure for a switchgear according to claim 6, characterized in that: The anti-detachment mechanism (12) also includes a second spring (1206). The other end of the anti-detachment rod (1202) is fixedly installed on the bottom surface of the anti-detachment groove (1201). The second spring (1206) is located on the anti-detachment rod (1202) and is located between the bottom surface of the sleeve (1205) and the anti-detachment groove (1201).

8. The three-phase current sensor mounting structure for a switchgear according to claim 1, characterized in that: Also includes: A cabinet door (2) is movably installed on the side of the switch cabinet (1). A hinge (3) is fixedly installed on the cabinet door (2) and is movably installed with the switch cabinet (1) through the hinge (3). A lock (4) is movably installed on one side of the cabinet door (2). A bracket (5) is fixedly installed inside the switch cabinet (1). A mounting bracket (6) is fixedly installed on the bracket (5). A bolt (8) is movably installed at both ends of the mounting bracket (6) and is fixedly installed with the bracket (5) through the bolt (8). A three-phase sensor (7) is fixedly installed on the mounting bracket (6).

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