Network-related test wiring device with insulation monitoring function

Abstract

The embodiment of the invention provides a network-related test wiring device with an insulation monitoring function. The network-related test wiring device comprises a main cable, a branch cable, a branch connection box and a temperature insulation monitoring module, the first end of the main cable is used for connecting network-related test equipment; the branch connection box is used for detachably connecting the first end of the branch cable with the main cable; the second ends of the main cable and the branch cable are respectively provided with a first cable head and a second cable head which are used for connecting to-be-tested equipment; the temperature insulation monitoring module is used for monitoring the temperature and insulativity in the branch connection box. According to the embodiment of the invention, the two cable heads are detachably combined on one cable through the branch cable, and can be dismounted according to different equipment wiring requirements, thereby overcoming the condition that the test equipment and the tested equipment are different in wiring mode and cannot be normally connected to carry out a network-related test. And meanwhile, the temperature and the insulativity of the disassembly and assembly part are monitored, so that real and effective test data are timely and accurately provided for a power grid.

Description

Technical Field

[0001] The embodiments of the present disclosure belong to the technical field of network-related tests, and specifically relate to a network-related test wiring device with an insulation monitoring function. Background Art

[0002] In order to ensure the safe and stable operation of power stations, the power grid requires that new energy sites must complete grid-related tests within 6 months after commissioning, including a series of test items such as power quality, grid adaptability, and fault voltage ride-through. The test conditions required for different tests are also different. The grid adaptability test and the fault voltage ride-through test require the test equipment to be connected in series to the high-voltage side of the boost transformer at the outlet of the unit / generation unit. At present, the wiring methods of the high-voltage side of the boost transformer produced by different manufacturers are different. The more common ones are the crimped cable connector and the elbow cable connector (also known as the European cable connector) that are directly connected by bolts with high-voltage cold shrink cable connectors.

[0003] At present, the wiring of equipment involved in network tests in the industry is all crimped with high-voltage cold shrink cable connectors. As a result, it is easy for the wiring method of the test equipment and the tested equipment to be different, resulting in a failure to connect normally, the on-site test cannot be carried out normally, and the corresponding test items cannot be completed as required by relevant regulations. As a result, the safe and stable operation of the power grid cannot be effectively guaranteed and the operation of equipment in the station also has safety risks. Summary of the invention

[0004] The embodiments of the present disclosure aim to solve at least one of the technical problems existing in the prior art and provide a grid-related test wiring device with an insulation monitoring function.

[0005] The grid-related test wiring and insulation monitoring device includes a main cable, a branch cable, a branch connection box and a temperature insulation monitoring module;

[0006] The first end of the main cable is used to connect to network-related test equipment;

[0007] The branch connection box is used to detachably connect the first end of the branch cable to the main cable;

[0008] The second ends of the main cable and the branch cable are respectively provided with a first cable head and a second cable head for connecting to the tested equipment;

[0009] The temperature and insulation monitoring module is used to monitor the temperature and insulation inside the branch connection box.

[0010] Furthermore, the branch connection box comprises an insulating shell and a wire core clamping plate arranged in the insulating shell;

[0011] The insulating housing comprises a first half shell and a second half shell, wherein the first half shell and the second half shell are detachably fixed to each other by fixing bolts;

[0012] The wire core clamp includes a first plate and a second plate, wherein the first plate and the second plate are detachably fixed to each other by fixing bolts;

[0013] The wire cores of the main cable and the branch cable are both clamped between the first plate and the second plate, so that the main cable and the branch cable are electrically connected through the wire core clamp.

[0014] Further, the insulating shell includes a first insulating shell and a second insulating shell;

[0015] The first insulating shell is disposed around the second insulating shell;

[0016] A sealing strip is provided at the junction of the first half shell and the second half shell of the first insulating shell.

[0017] Furthermore, a waterproof component is provided at the wire outlet at the second end of the first insulating shell.

[0018] Furthermore, the branch connection box is also provided with a shielded grounding wire;

[0019] The first end of the shielded grounding wire is electrically connected to the shielding layers of the main cable and the branch cable and the insulating shell respectively, and the second end of the shielded grounding wire is electrically connected to the grounding end.

[0020] Further, the temperature insulation monitoring module includes a temperature monitoring module, an insulation detection module and a main control module;

[0021] The temperature monitoring module is used to monitor the temperature inside the branch connection box;

[0022] The insulation detection module is used to monitor the resistance value of the branch connection box housing;

[0023] The main control module is electrically connected to the temperature monitoring module and the insulation detection module respectively, and is used to receive the temperature and the resistance value.

[0024] Furthermore, the temperature monitoring module includes a temperature sensor and a temperature controller;

[0025] The temperature sensor is arranged in the branch connection box and is used to measure the temperature in the branch connection box;

[0026] The temperature controller is electrically connected to the temperature sensor and the main control module respectively.

[0027] Further, the insulation detection module includes an insulation detection probe and an insulation detector;

[0028] The insulation detection probe is arranged on the shell of the branch connection box, and is used to apply voltage to the shell of the branch connection box and measure current;

[0029] The insulation tester is electrically connected to the insulation detection probe and the main control module respectively, and is used to calculate the resistance value of the branch connection box housing and send it to the main control module.

[0030] Optionally, the first cable head is a crimped cable head, and the second cable head is an elbow cable head;

[0031] A support is provided within a predetermined length extending from the second end of the main cable to the first end of the main cable, for preventing the crimping cable head from contacting the ground.

[0032] Optionally, the device further comprises an insulating protective cap;

[0033] The insulating protection cap is detachably provided on the first cable head and / or the second cable head, and is used for providing insulation protection to the first cable head and / or the second cable head in a non-test state.

[0034] The disclosed embodiment of a grid-related test wiring device with an insulation monitoring function combines two wiring methods in a detachable manner on one cable in the form of a branch cable, thereby overcoming the problem that the test equipment and the tested equipment cannot be normally connected for grid-related testing due to different wiring methods. The branch cable can be disassembled and assembled according to different equipment wiring requirements, which is convenient for on-site work and protection of the cable head, and realizes rapid and seamless conversion of wiring between different tested equipment at the grid-related test site. At the same time, the temperature and insulation of the cable branches are monitored in real time, ensuring that real and effective test data can be provided to the power grid in a timely and accurate manner, thereby improving the safety and stability of new energy sites and power grids. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a structural schematic diagram of a network-related test wiring device with insulation monitoring function according to an embodiment of the present disclosure;

[0036] Figure 2 It is a schematic diagram of the structure of the branch connection box of an embodiment of the present disclosure. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present disclosure.

[0038] In addition, the described features, structures or characteristics may be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present disclosure. However, those skilled in the art will appreciate that the technical solutions of the present disclosure may be practiced without one or more of the specific details, or other methods, components, devices, steps, etc. may be adopted. In other cases, known methods, devices, implementations or operations are not shown or described in detail to avoid blurring the various aspects of the present disclosure.

[0039] The flowcharts shown in the accompanying drawings are only exemplary and do not necessarily include all the contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps can be decomposed, and some operations / steps can be combined or partially combined, so the actual execution order may change according to actual conditions.

[0040] It should be understood that although the terms first, second, third, etc. may be used in this disclosure to describe various components, these components should not be limited by these terms. These terms are used to distinguish one component from another component. Therefore, the first component discussed below can be referred to as the second component without departing from the teachings of the concepts of the present disclosure. As used in this disclosure, the term "and / or" includes any one of the associated listed items and all combinations of one or more.

[0041] Those skilled in the art will appreciate that the drawings are merely schematic diagrams of example embodiments, and the modules or processes in the drawings are not necessarily necessary for implementing the present disclosure, and therefore cannot be used to limit the protection scope of the present disclosure.

[0042] like Figure 1 As shown, an embodiment of the present disclosure provides a network-related test wiring device with an insulation monitoring function, the device comprising a main cable 1, a branch cable 2, a branch connection box 3 and a temperature insulation monitoring module 31. The first end of the main cable 1 is used to connect the network-related test equipment. The branch connection box 3 is used to detachably connect the first end of the branch cable 2 to the main cable 1. The second ends of the main cable 1 and the branch cable 2 are respectively provided with a first cable head 4 and a second cable head 5 for connecting the tested equipment. The temperature insulation monitoring module 31 is used to monitor the temperature and insulation in the branch connection box 3.

[0043] Specifically, one end of the main cable 1 is led out by the test equipment, and the test equipment includes power supply, protection equipment, measuring instruments, etc. A first cable head 4 is set at the other end of the main cable 1. The first cable head 4 can be a crimping cable head with a wider range of usage scenarios, and is used for crimping wiring of box-type transformer test wiring. One end of the branch cable 2 is led out from the main cable 1 through the branch connection box 3. The branch connection box 3 can realize the electrical connection and separation between the main cable 1 and the branch cable 2. The branch connection box 3, that is, the connection point between the branch cable 2 and the main cable 1, can be set at the end of the main cable 1, that is, near the second end of the main cable 1, to facilitate the overall management of the network-related test wiring and insulation monitoring device. A second cable head 5 is set at the other end of the branch cable 2. The second cable head 5 can be an elbow cable head, which is used for the box-type transformer test wiring with European (i.e. elbow) plug wiring. The elbow cable head 5 is provided with a grounding wire 6. The grounding wire 6 is electrically connected to the shielding layer of the elbow cable head 5 and the ground terminal GND respectively, and the metal shell of the elbow cable head 5 is led out to the ground terminal GND, and a low-impedance electrical path is established between the metal shell of the elbow cable head 5 and the ground, so that when it fails or the live part contacts its metal shell, the grounding wire 6 will quickly guide the current of the live part to the ground to prevent the current from passing through the human body or other equipment and causing dangers such as electric shock and fire. Since the disassembly and assembly of the branch connection box 3 during use may affect its insulation, a temperature insulation monitoring module 31 needs to be set to monitor its temperature and insulation in real time.

[0044] For example, Figure 2 As shown, the branch connection box comprises an insulating shell (3) and a wire core clamp (4) arranged in the insulating shell. The insulating shell (3) comprises a first half shell and a second half shell, and the first half shell and the second half shell are detachably fixed to each other by fixing bolts (30). The wire core clamp (4) comprises a first plate member and a second plate member, and the first plate member and the second plate member are detachably fixed to each other by fixing bolts (40). The wire cores of the main cable (1) and the branch cable (2) are both clamped between the first plate member and the second plate member, so that the main cable (1) and the branch cable (2) are electrically connected through the wire core clamp (4).

[0045] Specifically, the insulating shell (3) is composed of two half shells spliced ​​together, and the two half shells are fixed to each other by fixing bolts (30). A plurality of wire core clamps (4) can be provided inside the insulating shell (3), and are arranged in sequence along the cable. Each wire core clamp (4) is composed of two plates, and the plates are fixed to each other by fixing bolts (40), wherein each plate is provided with grooves of corresponding sizes for clamping and fixing the wire cores of the main cable (1) and the branch cable (2) in the groove position. The wire core clamp (4) is made of the same material as the cable core box, so that the main cable (1) and the branch cable (2) clamped therein are conductive, thereby forming an electrical connection between the branch cable (2) and the main cable (1).

[0046] When the branch cable (2) is no longer needed, the fixing bolts (30) of the insulating housing (3) and the fixing bolts (40) of the wire core clamping plate (4) can be removed, and the branch cable (2) can be taken out and stored in a special storage device. Each time the branch cable is disassembled and assembled, cable cleaning paper, lubricating silicone grease, etc. can be used to ensure the sealing and insulation of the branch connection box.

[0047] For example, Figure 2 As shown, the insulating shell (3) comprises a first insulating shell (31) and a second insulating shell (32). The first insulating shell (31) is arranged around the second insulating shell (32). A sealing strip (5) is provided at the junction of the first half shell and the second half shell of the first insulating shell (31).

[0048] Specifically, the insulating shell (3) adopts a double-layer structure, the outer first insulating shell (31) has a high strength and plays the role of insulation and protection; the inner second insulating shell (32) has a lower strength requirement and plays the role of the second layer of insulation, thereby enhancing the insulation effect of the branch connection box and further ensuring that the insulation level can meet the requirements. When the first half shell and the second half shell of the first insulating shell (31) are connected, the sealing strip (5) is used to block the gap between the two half shells to prevent impurities such as dust or liquid from entering the interior of the insulating shell (3) and affecting the insulation of the branch connection box, thereby protecting the components inside the branch connection box and extending its service life.

[0049] For example, Figure 2 As shown, the wire outlet at the second end of the first insulating housing (31) is provided with a waterproof member (6).

[0050] Specifically, the second end of the first insulating housing (31) has outlets for the main cable (1) and the branch cable (2). This structure cannot be sealed with a sealing strip, and a waterproof component (6) needs to be separately provided to seal the cable outlets to prevent impurities such as dust or liquid from entering the interior of the insulating housing (3) and thus affecting the insulation of the branch connection box, thereby protecting the components inside the branch connection box and extending its service life.

[0051] For example, Figure 2 As shown, the branch connection box is further provided with a shielded grounding wire (7). The first end of the shielded grounding wire (7) is electrically connected to the shielding layers of the main cable (1) and the branch cable (2) and the insulating housing (3), respectively, and the second end of the shielded grounding wire (7) is electrically connected to a ground terminal GND.

[0052] Specifically, a shielded grounding wire (7) is provided to ground the shielding layers of the main cable (1) and the branch cable (2) and the insulating casing (3). Specifically, the outer first insulating casing (31) can be grounded, so that the shielding layers of the main cable (1) and the branch cable (2) and the insulating casing (3) are connected to the ground. When the branch connection box leaks electricity, the shielded grounding wire (7) will quickly guide the current of the live part to the ground to prevent the current from passing through the human body or other equipment and causing dangers such as electric shock and fire. At the same time, the shielded grounding wire (7) also improves the insulation level of the cable shielding layer and reduces interference with surrounding electrical equipment.

[0053] For example, Figure 2 As shown, the temperature insulation monitoring module comprises a temperature monitoring module, an insulation detection module and a main control module (10). The temperature monitoring module is used to monitor the temperature in the branch connection box. The insulation detection module is used to monitor the resistance value of the branch connection box housing. The main control module (10) is electrically connected to the temperature monitoring module and the insulation detection module respectively, and is used to receive the temperature and the resistance value.

[0054] Specifically, the temperature monitoring module comprises a temperature sensor (81) and a temperature controller (82). The temperature sensor (81) is arranged in the branch connection box and is used to measure the temperature in the branch connection box. The temperature controller (82) is electrically connected to the temperature sensor (81) and the main control module (10) respectively. The temperature sensor (81) may include a plurality of temperature sensors, and the temperature controller (82) receives the temperatures measured by each temperature sensor (81), calculates the average temperature, and inputs the average temperature into the main control module (10) through a network cable or the like.

[0055] The insulation detection module comprises an insulation detection probe (91) and an insulation detector (92). The insulation detection probe (91) is arranged on the outer shell of the branch connection box, and is used to apply voltage to the outer shell of the branch connection box and measure the current in the outer shell at the same time. The insulation detector (92) is electrically connected to the insulation detection probe (91) and the main control module (10) respectively. The insulation detection probe (91) sends the applied voltage value and the measured current value to the insulation detector (92). The insulation detector (92) calculates the resistance value of the outer shell of the branch connection box according to the voltage value and the current value, and sends it to the main control module through a network cable or the like.

[0056] The main control module (10) may include a computer, a PLC or a display device, etc., which respectively receives the temperature and resistance values ​​sent by the temperature monitoring module and the insulation detection module, performs data analysis and display, and issues an alarm when the data is unqualified, thereby realizing real-time monitoring of the temperature and insulation condition of the branch connection box.

[0057] For example, Figure 1 As shown, the device further comprises a support member 7. The support member 7 is arranged within a predetermined length extending from the second end of the main cable 1 to the first end of the main cable 1, and is used to prevent the crimping type cable head 4 from contacting the ground.

[0058] Specifically, a support member 7 is provided within a distance from the main cable 1 to the crimping type cable head 4. The support member 7 may be Figure 1 The discs shown in the figure are stacked and made of insulating materials such as rubber. When the main cable 1 is placed on the ground or the crimped cable head 4 falls from the tested equipment in a charged state, it plays a supporting role to prevent the crimped cable head 4 from directly contacting the ground, causing the current to flow to the ground through the contact point, forming the risk of electric shock injury to the human body when contacting the charged ground. In addition, it can also prevent equipment failures such as short circuit, overcurrent and even equipment damage caused by the cable head touching the ground.

[0059] For example, Figure 1 As shown, the device further comprises an insulating protection cap 8. The insulating protection cap 8 is detachably arranged on the first cable head 4 and / or the second cable head 5, and is used for insulating and protecting the first cable head 4 and / or the second cable head 5 in a non-test state.

[0060] Specifically, the insulating protection cap 8 is made of a material with high insulation strength. When the crimped cable head 4 or the elbow cable head 5 is in a non-test state, that is, the cable head is not connected to the tested equipment, the insulating protection cap 8 is used to isolate the unused cable head from the outside to protect the cable head from external damage and its insulation. In the test state, when the crimped cable head 4 or the elbow cable head 5 needs to be connected to the tested equipment, the insulating protection cap 8 is removed from the cable head.

[0061] The disclosed embodiment of a grid-related test wiring device with an insulation monitoring function combines two wiring methods in a detachable manner on one cable in the form of a branch cable, thereby overcoming the problem that the test equipment and the tested equipment cannot be normally connected for grid-related testing due to different wiring methods. The branch cable can be disassembled and assembled according to different equipment wiring requirements, which is convenient for on-site work and protection of the cable head, and realizes rapid and seamless conversion of wiring between different tested equipment at the grid-related test site. At the same time, the temperature and insulation of the cable branches are monitored in real time, ensuring that real and effective test data can be provided to the power grid in a timely and accurate manner, thereby improving the safety and stability of new energy sites and power grids.

[0062] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present disclosure, but the present disclosure is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and substance of the present disclosure, and these modifications and improvements are also considered to be within the scope of protection of the present disclosure.

Claims

1. A network-related test wiring device with insulation monitoring function, characterized in that: The device comprises a main cable, a branch cable, a branch connection box and a temperature insulation monitoring module; The first end of the main cable is used to connect to network-related test equipment; The branch connection box is used to detachably connect the first end of the branch cable to the main cable; The second ends of the main cable and the branch cable are respectively provided with a first cable head and a second cable head for connecting to the tested equipment; The temperature and insulation monitoring module is used to monitor the temperature and insulation inside the branch connection box.

2. The device according to claim 1, characterized in that The branch connection box comprises an insulating shell and a wire core clamping plate arranged in the insulating shell; The insulating housing comprises a first half shell and a second half shell, wherein the first half shell and the second half shell are detachably fixed to each other by fixing bolts; The wire core clamp includes a first plate and a second plate, wherein the first plate and the second plate are detachably fixed to each other by fixing bolts; The wire cores of the main cable and the branch cable are both clamped between the first plate and the second plate, so that the main cable and the branch cable are electrically connected through the wire core clamp.

3. The device according to claim 2, characterized in that The insulating shell comprises a first insulating shell and a second insulating shell; The first insulating shell is disposed around the second insulating shell; A sealing strip is provided at the junction of the first half shell and the second half shell of the first insulating shell.

4. The device according to claim 3, characterized in that The wire outlet at the second end of the first insulating shell is provided with a waterproof member.

5. The device according to claim 2, characterized in that The branch connection box is also provided with a shielded grounding wire; The first end of the shielded grounding wire is electrically connected to the shielding layers of the main cable and the branch cable and the insulating shell respectively, and the second end of the shielded grounding wire is electrically connected to the grounding end.

6. The device according to any one of claims 1 to 5, characterized in that The temperature insulation monitoring module includes a temperature monitoring module, an insulation detection module and a main control module; The temperature monitoring module is used to monitor the temperature inside the branch connection box; The insulation detection module is used to monitor the resistance value of the branch connection box housing; The main control module is electrically connected to the temperature monitoring module and the insulation detection module respectively, and is used to receive the temperature and the resistance value.

7. The device according to claim 6, characterized in that The temperature monitoring module includes a temperature sensor and a temperature controller; The temperature sensor is arranged in the branch connection box and is used to measure the temperature in the branch connection box; The temperature controller is electrically connected to the temperature sensor and the main control module respectively.

8. The device according to claim 6, characterized in that The insulation detection module includes an insulation detection probe and an insulation detector; The insulation detection probe is arranged on the shell of the branch connection box, and is used to apply voltage to the shell of the branch connection box and measure current; The insulation tester is electrically connected to the insulation detection probe and the main control module respectively, and is used to calculate the resistance value of the branch connection box housing and send it to the main control module.

9. The device according to claim 1, characterized in that The first cable head is a crimped cable head, and the second cable head is an elbow cable head; A support is provided within a predetermined length extending from the second end of the main cable to the first end of the main cable, for preventing the crimping cable head from contacting the ground.

10. The device according to claim 1, characterized in that The device also includes an insulating protective cap; The insulating protection cap is detachably provided on the first cable head and / or the second cable head, and is used for providing insulation protection to the first cable head and / or the second cable head in a non-test state.

Images