Wire diameter detector for connecting conductor of low-voltage surge protection device

Abstract

The utility model discloses a low-voltage surge protector connecting conductor wire diameter detector, which relates to the technical field of low-voltage surge protectors and comprises a comparator, and a standard sample area, a technical standard requirement area and an instruction area are arranged on the front surface of the comparator. The standard sample area is provided with six connecting conductor samples with different wire diameters, and the connecting conductor samples are fixedly mounted on the front surface of the comparator through wire clamps; the technical standard requirement area is engraved with a technical standard requirement of a surge protection device connecting conductor; and instructions and processes of the device are engraved in the instruction area. The low-voltage surge protection device connecting conductor wire diameter detector provided by the utility model meets the actual work requirements of field detection of a surge protection device connecting conductor, and solves the problems that direct measurement cannot be performed and electric shock risks exist.

Description

Technical Field

[0001] The utility model relates to the technical field of low-voltage surge protectors, in particular to a wire diameter detector for connecting conductors of a low-voltage surge protector. Background Art

[0002] (I) Surge protector connection conductor detection requirements

[0003] Lightning protection device is a whole system used to reduce personal injury and physical damage caused by lightning strikes on buildings. It consists of two parts: external and internal lightning protection devices. Surge protector is an important component of lightning protection device. It is an electrical appliance used to limit transient overvoltage and discharge surge current. Surge protector is widely used and installed in flammable and explosive hazardous chemical places, municipal buildings, residential and office buildings, and various electrical equipment. According to the relevant requirements of the "Lightning Protection and Disaster Reduction Management Measures" and "Lightning Protection Device Testing Technical Specifications" (GB / T 21431-2023), the inspection interval of lightning protection devices for buildings with explosive environments is 6 months, and the inspection interval of lightning protection devices for other buildings is 12 months. Lightning protection device is the whole process of inspection, measurement and comprehensive information analysis and processing to determine whether the lightning protection device meets the standard requirements. In the detection of lightning protection device, it is necessary to test the parameters such as surge protector layout, main performance parameters, materials and specifications of connecting conductors, connection process, appearance, protection level and inter-level coordination, external disconnector (overcurrent protection), and electrical connection performance.

[0004] (II) Technical indicators for detection of surge protector connection conductors

[0005] The materials and specifications of the connecting conductors of the power surge protector require that the materials and cross-sectional area of ​​the connecting conductors should meet certain requirements. The materials and cross-sectional area of ​​the connecting conductors are different according to the installation location and type of the surge protector. At the boundary between LPZ0 and LPZ1, the phase line of the Class I surge protector is not less than 6mm2 and the grounding terminal connection line is not less than 16mm2. The phase line of the Class II surge protector is not less than 4mm2 and the grounding terminal connection line is not less than 6mm2. The phase line of the Class II surge protector at other locations is not less than 2.5mm2 and the grounding terminal connection line is not less than 4mm2. The phase line of the Class III surge protector is not less than 1mm2 and the grounding terminal connection line is not less than 1.5mm2. In addition, the grounding terminal of the antenna feed line surge protector should be connected to the equipotential grounding terminal board at the junction of LPZ0A or LPZ0B and LPZ1 using a copper core wire with a cross-sectional area of ​​not less than 6mm2. The grounding terminal of the signal line surge protector should be connected to the equipotential connection network of the equipment room using a copper core wire with a cross-sectional area of ​​not less than 1mm2. The grounding wire should be short and straight.

[0006] (III) Current detection of surge protectors is difficult

[0007] In the detection of lightning protection devices, the installation of the Technical Specifications for Lightning Protection Devices (GB / T21431-2023) 5.5.6.3.3 requires that the detection be carried out by observation (can be carried out by comparison method), and if necessary, length measuring equipment is used for measurement, such as vernier calipers and other tools. In actual detection, the surge protector has been installed in the power supply box or the target location and is in a live working state. Direct measurement with a length measuring tool may cause electric shock to the inspector, thereby bringing safety operation risks. It is difficult to use a length measuring tool to reach into the power supply box to directly measure the wire diameter of the connecting conductor. At the same time, the spacing and space between the phase line and the phase line, and between the phase line and the grounding line in general installations are difficult to allow length measuring tools to be used for detection. When the detection specification requires that direct measurement is not possible, observation methods, such as comparison methods, can also be used for comparison inspection. In the actual work of lightning protection device detection, observation is often used for inspection. The inspector determines the approximate wire diameter of the connecting conductor by eyewitness, or asks the on-site staff about the wire diameter and compares it with the wire diameter of the connecting conductor in the detection technical specifications to determine whether the technical indicators are met. However, this inspection method has certain uncertainties. For example, if the inspectors are not familiar with the sizes of connecting conductors of various wire diameters, or if the on-site staff give incorrect answers, it will lead to incorrect judgment of the wire diameter of the surge protector connecting conductor, thereby posing a safety hazard to lightning protection, causing personal injury or loss of electrical equipment to users. Utility Model Content

[0008] The purpose of this utility model is to solve the problem of uncertainty and potential safety hazards in the current on-site detection of surge protectors. According to the technical requirements of the Technical Specifications for Lightning Protection Device Detection (GB / T 21431-2023), a surge protector connection conductor comparison device that is easy to use on the detection site is designed. The device is equipped with a 16mm 2 , 6mm 2 , 4mm 2 , 2.5mm 2 , 1.5mm 2 , 1mm 2 The standard connecting conductor of the wire diameter is used for comparison between the device and the connecting conductor of the surge protector being tested when the test personnel witness the test, so as to complete the test of the connecting conductor conveniently, quickly and safely.

[0009] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0010] A low-voltage surge protector connecting conductor wire diameter detector comprises a comparator, wherein the front of the comparator is provided with a standard sample area, a technical standard requirement area, and an instruction area; the standard sample area is provided with connecting conductor samples of six different wire diameters, and the connecting conductor samples are fixedly mounted on the front of the comparator through line clips; the technical standard requirement area is engraved with the technical standard requirements for the surge protector connecting conductor; and the instruction area is engraved with the instructions and process for use of the device.

[0011] As a further improvement of the above scheme, the connecting conductor samples of six different wire diameters are respectively: 2 , 6mm 2 , 4mm 2 , 2.5mm 2 , 1.5mm 2 , 1mm 2 connecting conductor.

[0012] As a further improvement of the above solution, the comparator is a rectangular box structure with a length, width and height of 12 cm, 8 cm and 1 cm respectively.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. The utility model provides a low-voltage surge protector connection conductor wire diameter detector, which meets the actual work needs of on-site detection of surge protector connection conductors and solves the problem of being unable to measure directly and having the risk of electric shock;

[0015] 2. When using comparative detection and direct observation, the standard connecting conductor is directly compared with the detected connecting conductor on site, which solves the problem of uncertain judgment results caused by insufficient experience of detection technicians or inaccurate information;

[0016] 3. The device lists in detail the wire diameter parameters of the surge protector connecting conductor, so that on-site testers can easily and quickly obtain test results and improve overall work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural schematic diagram of a low-voltage surge protector connected to a conductor wire diameter detector.

[0018] In the figure: 1. Comparator; 2. Standard sample area; 3. Technical standard requirement area; 4. Instructions for use area; 5. Connecting conductor sample; 6. Line card. DETAILED DESCRIPTION

[0019] The technical solution of this patent is further described in detail below in conjunction with specific implementation methods.

[0020] Example, see Figure 1A low-voltage surge protector connecting conductor wire diameter detector comprises a comparator 1, and the front of the comparator 1 is provided with a standard sample area 2, a technical standard requirement area 3, and an instruction area 4; the standard sample area 2 is provided with connecting conductor samples 5 with six different wire diameters, and the connecting conductor samples 5 are fixedly installed on the front of the comparator 1 through a wire clip 6; the technical standard requirement area 3 is engraved with the technical standard requirements for the connecting conductor of the surge protector in accordance with the requirements of 5.5.6.3.3 of the "Technical Specifications for Lightning Protection Device Testing" (GB / T 21431-2023); the instruction area 4 is engraved with the instructions and process of the device.

[0021] The connecting conductor samples 5 of six different wire diameters are respectively: 2 , 6mm 2 , 4mm 2 , 2.5mm 2 , 1.5mm 2 , 1mm 2 connecting conductor.

[0022] The comparator 1 is a rectangular box structure with a length, width and height of 12 cm, 8 cm and 1 cm respectively.

[0023] When using, directly observe the diameter of the conductors connected to the surge protector, including the phase-to-phase line, the ground connection line or other locations;

[0024] Use the standard wire diameter connecting conductor sample 5 in the standard sample area 2 on the comparator 1 to compare with the wire diameter of the connecting conductor to be inspected;

[0025] Confirm that the wire diameter of the conductor being inspected is not less than the standard requirements. If it is less, it does not meet the standard requirements.

[0026] The utility model provides a low-voltage surge protector connection conductor wire diameter detector, which meets the actual work needs of on-site detection of surge protector connection conductors and solves the problems of being unable to directly measure and having the risk of electric shock; when using comparative detection and direct observation, a standard connection conductor and a detected connection conductor are used for direct comparison on site, which solves the problem of uncertain judgment results caused by insufficient experience of detection technicians or inaccurate information; the device lists the wire diameter parameters of the surge protector connection conductor in detail, so that on-site detection personnel can easily and quickly obtain the detection results, thereby improving overall work efficiency.

Claims

1. A low voltage surge protector connected to a conductor wire diameter detector, comprising a comparator (1), characterized in that: The front of the comparator (1) is provided with a standard sample area (2), a technical standard requirement area (3), and an instruction area (4); the standard sample area (2) is provided with connection conductor samples (5) of six different wire diameters, and the connection conductor samples (5) are fixedly installed on the front of the comparator (1) through a wire clip (6); the technical standard requirement area (3) is engraved with the technical standard requirements for the connection conductor of the surge protector; and the instruction area (4) is engraved with the instructions and process for use of the device.

2. The low-voltage surge protector connecting conductor wire diameter detector according to claim 1, characterized in that: The connecting conductor samples (5) of six different wire diameters are respectively: the cross-sectional area is 16 mm 2 , 6mm 2 , 4mm 2 , 2.5mm 2 , 1.5mm 2 , 1mm 2 connecting conductor.

3. The low-voltage surge protector connecting conductor wire diameter detector according to claim 2, characterized in that: The comparator (1) is a rectangular box structure with a length, width and height of 12 cm, 8 cm and 1 cm respectively.

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