Photovoltaic monitoring system

Abstract

The utility model provides a photovoltaic monitoring system, which relates to the field of photovoltaic technology and comprises a first tail fiber, the first end of the first tail fiber is connected with the first end of an optical distribution frame, and the second end of the optical distribution frame is connected with the first end of a box-type transformer substation optical fiber distribution box through a single-mode optical cable; the second end of the box-type transformer substation optical fiber distribution box is connected in series with a plurality of photovoltaic monitoring units through a second tail fiber; the second end of the first tail fiber is connected with a monitoring host, and the monitoring host is connected with a remote vision work station through a network cable. By arranging the photovoltaic monitoring loop, all the photovoltaic arrays, the box-type transformer and the camera shooting assembly are connected with the monitoring host, and the effect of transmitting measurement and control signals of the photovoltaic arrays and the box-type transformer and video signals of the camera shooting assembly is achieved. The monitoring host is connected with the remote vision work station through a network cable, and remote monitoring of the photovoltaic array, the box-type transformer and the camera shooting assembly by workers is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaics, in particular to a photovoltaic monitoring system. Background Art

[0002] In the process of photovoltaic power generation, the photovoltaic field includes a large number of devices with different functions. In order to ensure that the photovoltaic field can continuously and stably output electrical energy, it is necessary to monitor the various components in the photovoltaic field in real time and promptly discover hidden dangers in the equipment, thereby ensuring the normal operation of the photovoltaic power generation equipment.

[0003] In practical applications, it is difficult to conduct timely and effective remote monitoring of a large number of photovoltaic arrays in a large photovoltaic field, which makes it difficult to timely discover hidden dangers in the equipment and ensure the normal operation of photovoltaic power generation equipment. Utility Model Content

[0004] The utility model provides a photovoltaic monitoring system, which solves the technical problem that it is difficult to effectively monitor a large number of photovoltaic arrays.

[0005] To solve the above technical problems, the technical solution of this novel invention is as follows:

[0006] A photovoltaic monitoring system, comprising:

[0007] A photovoltaic monitoring loop, the photovoltaic monitoring loop comprising: a first pigtail, a first end of the first pigtail being connected to a first end of an optical distribution frame, a second end of the optical distribution frame being connected to a first end of a box-type transformer optical fiber distribution box via a single-mode optical cable;

[0008] The second end of the box-type transformer optical fiber distribution box is connected in series with a plurality of photovoltaic monitoring units via a second pigtail;

[0009] The second end of the first pigtail is connected to a monitoring host, and the monitoring host is connected to a remote viewing workstation via a network cable.

[0010] Optionally, the photovoltaic monitoring unit includes a box-type transformer optical fiber junction box, a box-type transformer monitoring module and a video monitoring switch connected to the box-type transformer optical fiber junction box via a second pigtail;

[0011] The box-type transformer monitoring module is connected in series with the communication box, the string inverter and the photovoltaic array in sequence through cables;

[0012] The box-type transformer monitoring module includes: a box-type transformer measurement and control switch, a longitudinal encryption device connected to the box-type transformer measurement and control switch, and a box-type transformer measurement and control device connected to the longitudinal encryption device;

[0013] The video surveillance switch is connected in series with the optical terminal and the camera assembly in sequence through cables and network cables;

[0014] The box-type transformer monitoring module, the video monitoring switch and the camera assembly are all powered by the box-type transformer self-use transformer.

[0015] Optionally, the box-type transformer measurement and control switch is connected to the box-type transformer optical fiber junction box via a second pigtail;

[0016] The box-type transformer measurement and control switch and the longitudinal encryption device, as well as the longitudinal encryption device and the box-type transformer measurement and control device are connected via armored Category 5e shielded twisted pair cables.

[0017] Optionally, the second pigtail includes 24 pigtails, of which 8 are pigtails for signal transmission of the box-type transformer measurement and control device, 8 are pigtails for video surveillance signal transmission, and the remaining 8 are spare pigtails.

[0018] Optionally, the first end of the box-type transformer optical fiber distribution box is provided with an input port, and the second end is provided with 24 output ports.

[0019] Optionally, the photovoltaic monitoring loop includes 6 or 7 photovoltaic monitoring units.

[0020] Optionally, the monitoring host includes a video surveillance host, a screen splitter, a video matrix switcher and a box transformer measurement and control host;

[0021] The video monitoring host, screen splitter, video matrix switcher and box-type transformer measurement and control host are all connected in parallel with the Ethernet switch;

[0022] The Ethernet switch is connected to the remote viewing workstation via a network cable.

[0023] Optionally, the first pigtail includes a pigtail for signal transmission of a box-type transformer measurement and control switch and a pigtail for signal transmission of a video switch;

[0024] The transmission pigtail of the box-type transformer measurement and control switch is connected to the box-type transformer measurement and control host, and the signal transmission pigtail of the video switch is connected in parallel to the video monitoring host, the screen splitter and the video matrix switch.

[0025] Optionally, the camera assembly includes a base plate;

[0026] A vertical pole vertically connected to the base plate;

[0027] A ball camera bracket vertically connected to the side of the vertical pole;

[0028] The end of the ball camera bracket is fixedly connected to the camera.

[0029] Optionally, a lightning rod is provided on the top of the vertical pole;

[0030] A reinforcing rib is provided between the bottom of the upright pole and the bottom plate;

[0031] The height of the vertical pole is greater than 4.5 meters;

[0032] The video monitoring switch and the optical terminal are both arranged inside the vertical pole.

[0033] The above solution of the utility model includes at least the following beneficial effects:

[0034] The above solution of the utility model is a photovoltaic monitoring system, comprising:

[0035] Photovoltaic monitoring circuit, the photovoltaic monitoring circuit comprises: a first pigtail, the first end of the first pigtail is connected to the first end of the optical distribution frame, the second end of the optical distribution frame is connected to the first end of the box transformer optical fiber distribution box through a single-mode optical cable; the second end of the box transformer optical fiber distribution box is connected in series with multiple photovoltaic monitoring units through a second pigtail; the second end of the first pigtail is connected to a monitoring host, and the monitoring host is connected to a remote viewing workstation through a network cable. The technical solution of the utility model, by setting up a photovoltaic monitoring circuit, connects all photovoltaic arrays, box transformers and camera components to the monitoring host, plays a role in transmitting the measurement and control signals of the photovoltaic array and box transformer and the video signal of the camera component. The monitoring host is connected to the remote viewing workstation through a network cable, so that the staff can remotely monitor the photovoltaic array, box transformer and camera component. The second pigtail is connected in series with multiple photovoltaic monitoring units, thereby connecting in series with multiple photovoltaic arrays, which plays a role in saving cables. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is the system configuration diagram of the utility model photovoltaic monitoring system;

[0037] Figure 2 This is the wiring diagram of the utility model photovoltaic monitoring system;

[0038] Figure 3 It is a schematic diagram of the structure of the camera assembly of the utility model;

[0039] Figure 4 This is the internal layout diagram of the optical distribution frame of the utility model;

[0040] Description of reference numerals:

[0041] 1. Remote viewing workstation; 2. Monitoring host; 3. First pigtail; 4. Optical distribution rack; 5. Single-mode optical cable; 6. Fiber optic distribution box of box-type transformer; 7. Second pigtail; 8. Fiber optic junction box of box-type transformer; 9. Monitoring module of box-type transformer; 91. Measurement and control switch of box-type transformer; 92. Vertical encryption equipment; 93. Measurement and control device of box-type transformer; 10. Video monitoring switch; 11. Optical terminal; 12. Camera assembly; 13. Bottom plate; 14. Pole; 15. Dome camera bracket; 16. Lightning rod; 17. Reinforcement rib; 18. Communication box; 19. String inverter; 20. Photovoltaic array; 21. Photovoltaic monitoring unit; 22. Box-type transformer for self-use. DETAILED DESCRIPTION

[0042] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0043] like Figure 1 and Figure 2 As shown, an embodiment of the utility model provides a photovoltaic monitoring system, comprising:

[0044] A photovoltaic monitoring circuit, the photovoltaic monitoring circuit comprising: a first pigtail 3, a first end of the first pigtail 3 is connected to a first end of an optical distribution frame 4, a second end of the optical distribution frame 4 is connected to a first end of a box-type transformer optical fiber distribution box 6 via a single-mode optical cable 5;

[0045] The second end of the box-type transformer optical fiber distribution box 6 is connected in series with a plurality of photovoltaic monitoring units 21 via a second pigtail 7;

[0046] The second end of the first pigtail 3 is connected to the monitoring host 2, and the monitoring host 2 is connected to the remote viewing workstation 1 via a network cable.

[0047] In the above embodiment, the box transformer optical fiber distribution box 6, photovoltaic monitoring unit 21, second pigtail 7 and box transformer self-use transformer 22 in the photovoltaic monitoring loop are all located inside the box transformer. The optical distribution rack 4 is located in the optical fiber ring network switch cabinet in the booster station relay room.

[0048] The box-type transformer optical fiber distribution box 6 fuses the single-mode optical cable 5 in one of the photovoltaic monitoring loops into multiple second pigtails 7, and connects to the box-type transformer monitoring module 9 and the video monitoring switch 10 through the second pigtails 7, thereby connecting the box-type transformer monitoring module 9 and the video monitoring switch 10 with the single-mode optical cable 5.

[0049] The technical solution of the utility model, by setting up a photovoltaic monitoring loop, connects all photovoltaic arrays 20, box-type transformers and camera components 12 to the monitoring host 2, which plays a role in transmitting the measurement and control signals of the photovoltaic array 20 and the box-type transformer and the video signal of the camera component 12. The monitoring host 2 is connected to the remote viewing workstation 1 through a network cable, so that the staff can remotely monitor the photovoltaic array 20, the box-type transformer and the camera component 12. The second pigtail 7 is connected in series with multiple photovoltaic monitoring units 21, and thus connected in series with multiple photovoltaic arrays 20, which plays a role in saving cables.

[0050] In an optional embodiment of the utility model, the photovoltaic monitoring unit 21 includes a box-type transformer optical fiber junction box 8, a box-type transformer monitoring module 9 and a video monitoring switch 10 connected to the box-type transformer optical fiber junction box 8 via a second pigtail 7;

[0051] The box-type transformer monitoring module 9 is connected in series with the communication box 18, the string inverter 19 and the photovoltaic array 20 in sequence through cables;

[0052] The box-type transformer monitoring module 9 includes: a box-type transformer measurement and control switch 91, a longitudinal encryption device 92 connected to the box-type transformer measurement and control switch 91, and a box-type transformer measurement and control device 93 connected to the longitudinal encryption device 92;

[0053] The video surveillance switch 10 is connected in series with the optical terminal 11 and the camera assembly 12 in sequence through cables and network cables;

[0054] The box-type transformer monitoring module 9 , the video monitoring switch 10 and the camera assembly 12 are all powered by the box-type transformer self-use transformer 22 .

[0055] In an optional embodiment of the present utility model, the box-type transformer measurement and control switch 91 is connected to the box-type transformer optical fiber junction box 8 via a second pigtail 7;

[0056] The box-type transformer measurement and control switch 91 and the longitudinal encryption device 92, as well as the longitudinal encryption device 92 and the box-type transformer measurement and control device 93 are connected via armored Category 5e shielded twisted pair cables.

[0057] In the above two embodiments, Figure 2 As shown, the box-type transformer measurement and control switch 91 is provided with two sets of receiving ends and transmitting ends, and both the receiving ends and transmitting ends are connected to the second pigtail 7, which plays a role in quickly transmitting the measurement and control signals of the photovoltaic array 20 and the box-type transformer. The box-type transformer measurement and control switch 91 is connected to the box-type transformer measurement and control device 93 through the longitudinal encryption device 92, which can encrypt the signals collected by the box-type transformer measurement and control device 93 and play a role in transmitting the signals collected by the box-type transformer measurement and control device 93.

[0058] The box-type transformer measurement and control switch 91 and the vertical encryption device 92, as well as the vertical encryption device 92 and the box-type transformer measurement and control device 93 are connected via armored Category 5e shielded twisted pair cables and jumper cables, which can effectively improve the anti-interference capability.

[0059] The second end of the optical distribution frame 4 is connected to the multiple single-mode optical cables 5, and the multiple single-mode optical cables 5 are split into the first pigtails 3, and then connected to the monitoring host 2 through the second end of the first pigtails 3, so as to realize the transmission of the measurement and control signals of the photovoltaic array 20 and the box-type transformer and the video signal of the camera component 12 to the monitoring host 2, and at the same time, it plays a role in facilitating the connection of the box-type transformer with the optical distribution frame 4 which is far away.

[0060] The box-type transformer self-use transformer 22 supplies power to the box-type transformer monitoring module 9 , the video monitoring switch 10 and the camera assembly 12 through a power cable.

[0061] The communication box 18 communicates with the box-type transformer measurement and control device 93 via a 485 cable.

[0062] In an optional embodiment of the present invention, the second pigtail 7 includes 24 pigtails, 8 of which are pigtails for signal transmission of the box-type transformer measurement and control device, 8 of which are pigtails for video monitoring signal transmission, and the remaining 8 are spare pigtails.

[0063] In the above embodiment, preferably, cores 01-08 of the second fiber pigtail 7 are transmission fiber pigtails of the box-type transformer measurement and control device, serving as signal transmission channels of the box-type transformer measurement and control device 93; cores 09-16 of the second fiber pigtail 7 are video surveillance signal transmission fiber pigtails, serving as video surveillance signal transmission channels; and cores 17-24 of the second fiber pigtail 7 are spare fiber pigtails, serving as substitutes for cores 01-16.

[0064] One end of the second pigtail 7 is connected to the second end of the box-type transformer optical fiber distribution box 6, and the other end is connected in series with the box-type transformer optical fiber junction boxes 8, the box-type transformer monitoring modules 9 and the video monitoring switch 10 in the multiple photovoltaic monitoring units 21, so as to transmit the measurement and control signals of the photovoltaic array 20 and the box-type transformer in each photovoltaic monitoring loop, and the video signal of the camera component 12 to the box-type transformer optical fiber distribution box 6.

[0065] In an optional embodiment of the present invention, the first end of the box-type transformer optical fiber distribution box 6 is provided with an input port, and the second end is provided with 24 output ports.

[0066] In the above embodiment, the single-mode optical cable 5 is a 24-core single-mode optical cable. The first end of the box-type fiber distribution box 6 is connected to the single-mode optical cable 5, and the second end is connected to the 24 second pigtail fibers 7, so as to split the single-mode optical cable 5 into the second pigtail fibers 7.

[0067] In an optional embodiment of the present invention, the photovoltaic monitoring circuit includes 6 or 7 photovoltaic monitoring units 21 .

[0068] In the above embodiment, if Figure 2 As shown, in the photovoltaic monitoring loop, 6 or 7 photovoltaic monitoring units 21 are connected in series through the second pigtail 7, so that abnormal photovoltaic arrays 20 can be quickly discovered.

[0069] In an optional embodiment of the utility model, the monitoring host 2 includes a video monitoring host, a screen splitter, a video matrix switcher and a box transformer measurement and control host;

[0070] The video monitoring host, screen splitter, video matrix switcher and box-type transformer measurement and control host are all connected in parallel with the Ethernet switch;

[0071] The Ethernet switch is connected to the remote viewing workstation 1 via a network cable.

[0072] In an optional embodiment of the utility model, the first pigtail 3 includes a pigtail for signal transmission of a box-type transformer measurement and control switch and a pigtail for signal transmission of a video switch;

[0073] The transmission pigtail of the box-type transformer measurement and control switch is connected to the box-type transformer measurement and control host, and the signal transmission pigtail of the video switch is connected in parallel to the video monitoring host, the screen splitter and the video matrix switch.

[0074] In the above two embodiments, the video monitoring host, screen splitter, and video matrix switch are all connected to the video switch signal transmission pigtail in the first pigtail 3 to process the video signal. The box transformer measurement and control host is connected to the box transformer measurement and control switch signal transmission pigtail in the first pigtail 3 to process the measurement and control signal.

[0075] In an optional embodiment of the present utility model, the camera assembly 12 includes a bottom plate 13;

[0076] A vertical pole 14 vertically connected to the bottom plate 13;

[0077] A ball camera bracket 15 vertically connected to the side of the vertical pole 14;

[0078] The end of the ball camera bracket 15 is fixedly connected to the camera.

[0079] In the above embodiment, if Figure 3As shown, the camera assembly 12 is arranged near the box-type transformer, so that the box-type transformer self-use transformer 22 in the box-type transformer can power the camera assembly 12. The camera is aimed at the monitoring target in the direction of the light source. Preferably, the camera assembly 12 is arranged on the south side of the box-type transformer, close to the road and installed in the direction of the light source, and the distance between the camera assembly 12 and the box-type transformer is less than 10 meters.

[0080] In an optional embodiment of the utility model, a lightning rod 16 is provided on the top of the vertical pole 14;

[0081] A reinforcing rib 17 is provided between the bottom of the upright 14 and the bottom plate 13;

[0082] The height of the vertical pole 14 is greater than 4.5 meters;

[0083] The video surveillance switch 10 and the optical terminal 11 are both arranged inside the pole 14 .

[0084] In the above embodiment, if Figure 3 As shown, the camera, video surveillance switch 10 and optical terminal 11 are all connected to the box transformer 22 through the power cable arranged inside the vertical pole 14, which plays the role of supplying power to the camera, video surveillance switch 10 and optical terminal 11. The camera, video surveillance switch 10 and optical terminal 11 are connected in series with the video surveillance switch 10 in sequence through the signal cable, which plays the role of transmitting the video signal of the camera assembly 12. Further, the power cable and the signal cable are both arranged in a PVC pipe with a diameter of 25 mm.

[0085] The materials of the base plate 13, the vertical pole 14, the reinforcing rib 17, the ball camera bracket 15 and the lightning rod 16 are all hot-dip galvanized flat steel, and the thickness of the hot-dip galvanized layer is greater than 70 microns, which plays a role in improving the corrosion resistance of the base plate 13, the vertical pole 14, the reinforcing rib 17, the ball camera bracket 15 and the lightning rod 16. The base plate 13 is fixedly connected to the ground by bolts. The height of the camera from the ground is greater than 4.5 meters, ensuring that the camera can capture the full view of the photovoltaic array 20. The thickness of the reinforcing rib 17 is greater than 10mm, which plays a role in improving the stability of the camera assembly 12. The length of the lightning rod 16 is greater than 50cm and the diameter is greater than 8mm, which can prevent lightning from damaging the camera assembly 12. The bottom of the lightning rod 16 is rotatably connected to the top of the vertical pole 14 for easy replacement.

[0086] In a specific embodiment of the utility model, the photovoltaic monitoring system described in the present application includes 10 photovoltaic monitoring circuits, namely A circuit, B circuit, C circuit, D circuit, E circuit, F circuit, G circuit, H circuit, I circuit, and J circuit. Among them, 6 photovoltaic monitoring units 21 are connected in series in the A circuit, 7 photovoltaic monitoring units 21 are connected in series in the B circuit, 6 photovoltaic monitoring units 21 are connected in series in the C circuit, 7 photovoltaic monitoring units 21 are connected in series in the D circuit, 6 photovoltaic monitoring units 21 are connected in series in the E circuit, 7 photovoltaic monitoring units 21 are connected in series in the F circuit, 7 photovoltaic monitoring units 21 are connected in series in the G circuit, 6 photovoltaic monitoring units 21 are connected in series in the H circuit, 6 photovoltaic monitoring units 21 are connected in series in the I circuit, and 6 photovoltaic monitoring units 21 are connected in series in the J circuit. Since the single-mode optical cable 5 is a 24-core single-mode optical cable, the second end of the optical distribution frame 4 is connected to the 10 single-mode optical cables 5. Figure 4 As shown, the first end of the optical rack 4 is provided with 240 interfaces for connecting with the first pigtail 3. Each of the photovoltaic monitoring units 21 is connected in series with the communication box 18, the string inverter 19 and the photovoltaic array 20 in sequence through cables, and each of the photovoltaic monitoring units 21 is connected in series with the optical terminal 11 and the camera assembly 12 in sequence through cables and network cables, thereby realizing the monitoring of 64 photovoltaic arrays 20.

[0087] The above is 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 principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A photovoltaic monitoring system, characterized in that: include: A photovoltaic monitoring loop, the photovoltaic monitoring loop comprising: a first pigtail (3), a first end of the first pigtail (3) being connected to a first end of an optical distribution rack (4), a second end of the optical distribution rack (4) being connected to a first end of a box-type transformer optical fiber distribution box (6) via a single-mode optical cable (5); The second end of the box-type transformer optical fiber distribution box (6) is connected in series with a plurality of photovoltaic monitoring units (21) via a second pigtail (7); The second end of the first pigtail (3) is connected to a monitoring host (2), and the monitoring host (2) is connected to a remote viewing workstation (1) via a network cable.

2. The photovoltaic monitoring system according to claim 1, characterized in that: The photovoltaic monitoring unit (21) comprises a box-type transformer optical fiber junction box (8), a box-type transformer monitoring module (9) and a video monitoring switch (10) connected to the box-type transformer optical fiber junction box (8) via a second pigtail (7); The box-type transformer monitoring module (9) is connected in series with the communication box (18), the string inverter (19) and the photovoltaic array (20) in sequence through cables; The box-type transformer monitoring module (9) comprises: a box-type transformer measurement and control switch (91), a longitudinal encryption device (92) connected to the box-type transformer measurement and control switch (91), and a box-type transformer measurement and control device (93) connected to the longitudinal encryption device (92); The video monitoring switch (10) is connected in series with the optical terminal (11) and the camera assembly (12) in sequence through cables and network cables; The box-type transformer monitoring module (9), the video monitoring switch (10) and the camera assembly (12) are all powered by a box-type transformer self-use transformer (22).

3. The photovoltaic monitoring system according to claim 2, characterized in that: The box-type transformer measurement and control switch (91) is connected to the box-type transformer optical fiber junction box (8) via a second pigtail (7); The box-type transformer measurement and control switch (91) and the longitudinal encryption device (92), as well as the longitudinal encryption device (92) and the box-type transformer measurement and control device (93) are connected via armored Category 5e shielded twisted pair cables.

4. The photovoltaic monitoring system according to claim 1, characterized in that: The second pigtail (7) comprises 24 pigtails, of which 8 are pigtails for signal transmission of the box-type transformer measurement and control device, 8 are pigtails for video monitoring signal transmission, and the remaining 8 are spare pigtails.

5. The photovoltaic monitoring system according to claim 4, characterized in that: The box-type transformer optical fiber distribution box (6) is provided with an input port at the first end and 24 output ports at the second end.

6. The photovoltaic monitoring system according to claim 1, characterized in that: The photovoltaic monitoring loop comprises 6 or 7 photovoltaic monitoring units (21).

7. The photovoltaic monitoring system according to claim 2, characterized in that: The monitoring host (2) comprises a video monitoring host, a screen splitter, a video matrix switcher and a box transformer measurement and control host; The video monitoring host, screen splitter, video matrix switcher and box-type transformer measurement and control host are all connected in parallel with the Ethernet switch; The Ethernet switch is connected to the remote viewing workstation (1) via a network cable.

8. The photovoltaic monitoring system according to claim 7, characterized in that: The first pigtail (3) comprises a pigtail for signal transmission of a box-type transformer measurement and control switch and a pigtail for signal transmission of a video switch; The transmission pigtail of the box-type transformer measurement and control switch is connected to the box-type transformer measurement and control host, and the signal transmission pigtail of the video switch is connected in parallel to the video monitoring host, the screen splitter and the video matrix switch.

9. The photovoltaic monitoring system according to claim 8, characterized in that: The camera assembly (12) comprises a bottom plate (13); A vertical pole (14) vertically connected to the bottom plate (13); A ball camera bracket (15) vertically connected to the side of the vertical pole (14); The end of the ball camera bracket (15) is fixedly connected to the camera.

10. The photovoltaic monitoring system according to claim 9, characterized in that: A lightning rod (16) is arranged on the top of the vertical pole (14); A reinforcing rib (17) is provided between the bottom of the upright pole (14) and the bottom plate (13); The height of the vertical pole (14) is greater than 4.5 meters; The video monitoring switch (10) and the optical terminal (11) are both arranged inside the vertical pole (14).

Images