According to the new standard of IOS4207-2022, the developed and upgraded Current tracking test> instrument can be used in accordance with GB 4706.1-2008, IOS 4207-2022, IEC60112-2020 Solid insulating materials electric resistance Measurement method of tracking index and comparative tracking index, UL 746A, ASTM D 3638-2007, DIN 53480 and other standards, accurately and accurately measure the tracking index of actual materials and their comparative tracking index. In addition, the updated standard also pays attention to the influence of material composition and surface condition on the measurement results, and deletes IOS17037.1-1997, IOS7037.3-2003, IEC04, ISO293:1986 and ISO295:19915 A normative reference document.
Current leakage technology can be used to detect the conductive path in the material or insulating medium. It is to apply an AC voltage and drop a certain amount of electrolyte between the two electrodes. The surface is formed to detect the presence of leakage paths.
Current tracking is a non-destructive testing technique that can be used to detect conductive paths in substances or insulating media. This technology uses AC voltage to drop a certain amount of electrolyte solution between the two electrodes. When a certain amount of electrolyte solution is dropped, tiny tracking will be formed to detect the existing leakage path. Tracking test> technology is based on tracking to detect conductive paths in materials or insulating media, which can save a lot of time and money.The basic principle of
leakageelectrical tracking test> is to support the sample so that the upper surface is almost horizontal, apply electric stress through two electrodes, and continuously drop the electrolyte between the electrodes until The current device operates until sustained burning occurs or the test is passed. The duration of each group of tests is short (less than 1h), using platinum electrodes with a spacing of 4mm, at the center point of the two electrodes for 30sDrop about 50 drops or 100 drops (about 20mg per drop) of electrolyte at intervals, and apply an AC voltage of 100V-600V. If the medium is corroded or softened, a thicker sample can be used to retest, with a maximum thickness of 10mm. The existence of tracking is visible to the naked eye, this technology can save a lot of time and money, and provide an effective and reliable method for testing the insulation quality in materials or media.
Insulation material surface anti-tracking test> is a test method used to evaluate the surface anti-tracking performance of materials. As long as the sample size and processing technology are determined according to the operation steps, the anti-tracking ability of the insulating material surface can be accurately obtained. Liquid does not flow between the test electrodes, so there is no loss of electrolyte with this method. It is recommended to use a sample of 20 mm × 20 mm. If the electrolyte is not lost, a sample of 15 mm × 15 mm can also be used. An independent specimen is used for each test, and if multiple tests are to be performed on the same specimen, the distance between the test points may be sufficiently far apart to avoid flashes or smoke from the test points and contamination after corrosion or affecting other parts to be tested. measurement area.
Purpose of tracking test>
The main purpose is to simulate whether the conductive substances deposited on the surface of insulating materials by live parts of different polarities in the actual use of household appliances cause creepage on the surface of insulating materials, breakdown short circuit and fire hazard. It is an accelerated test conducted to ensure the safety of the product in a specific environment by the leakage traces that the insulating material is resistant to. Studies have found that when the environment is seriously polluted, some dirt or moisture will be deposited on the surface of the insulating material, resulting in leakage. Over time, the leakage will also cause corrosion and reduce the insulation performance of the insulating material. Therefore, the test of tracking resistance is imperative.
Application of tracking test>
Current tracking test> is used to measure the tolerance of solid insulating materials. It is widely used in various industries such as equipment, and can be used to measure the resistance of the surface of insulating materials under the combined action of electric field and polluted medium, as well as to measure the tracking index (CT1) and tracking index (PT1) of insulators. ). It consists of applying a defined voltage between platinum electrodes of defined dimensions (2mm×5mm) and dropping a defined droplet volume of contaminated liquid (0.1%NH4CL) at a defined height (35mm) at regular intervals (30s). The tracking tester is the preferred testing instrument for evaluating the withstand capacity of insulating materials, and it plays an important role in industries such as insulating materials, engineering plastics, electrical connectors, and accessories.