bsen50483-6-20xxtestrequirementsforlowvoltageaerialbundledcableaccessories—part6environmental

bsen50483-6-20xxtestrequirementsforlowvoltageaerialbundledcableaccessories—part6environmental内容摘要：

cable with the specific function of withstanding voltage [IEV 4610201] type test test required to be made before supplying a type of material covered by this standard on a general mercial basis, in order to demonstrate satisfactory performance characteristics to meet the intended application NOTE These tests are of such a nature that, after they have been made, they need not be repeated unless changes are made to the accessory materials, design or type of manufacturing process which might change the performance characteristics. 4 Symbols λ1 and λ2 wavelength of UV light source Em mean energy received by the samples E radiated energy of the lamp n number of cycles (defined in appropriate part of this standard) θ temperature measured by the black standard thermometer θE temperature of the chamber 5 Marking See Clause 6 of EN 504831. 6 (Spare) 7 (Spare) BS EN 504836:2020 EN 504836:2020 – 6 – 8 Type tests Number of test samples and number of cycles The number of samples and number of cycles for each of the following tests are included in each relevant part of EN 50483. Requirements The requirements for the following tests shall be as given in the relevant parts of this standard. Cleaning On pletion of the environmental tests, and between different environmental tests when carried out as a sequence, the samples shall, unless otherwise specified, be cleaned using running tap water for 5 min to 10 min and then by using demineralised water for the same period. The temperature of the water shall not exceed 35 176。 C. The samples shall be dried either by shaking by hand or using air blast to remove droplets of water. Corrosion ageing tests These tests shall be carried out when the products contain metallic parts (or parts protected with a metallic coating), which are exposed to the atmosphere. A justification of the tests is given in Annex A. Salt mist test Principle This test exposes samples to a neutral salt spray (concentration of NaCl: 5 %). Test equipment The test equipment is defined in Clause 3 of EN 60068211:1999. Test arrangement The preparation and use of the salt solution is defined in Clause 4 of EN 60068211:1999. Procedure The test procedure is defined in Clause 7 of EN 60068211:1999. The connectors or accessories shall be installed as defined in the relevant parts of EN 50483. The cycle duration prescribed, in accordance with EN 60068211:1999, shall be 7 days. No cleaning of the samples shall be carried out between cycles. Test reports The test report shall include the duration of exposure and the concentration and pH of the salt solution. Gas atmosphere tests NOTE 1 Two methods of testing are provided to meet the requirements of the gas atmosphere test. The first, Method 1, is based on the test procedure that has been used for many years in some countries. These countries have gained experience of both the procedures and outes of the test. The second, Method 2 is provided as an alternative as it requires a less plicated test environment and is based on ASTM G85. NOTE 2 This test may be necessary for accessories that are used in areas subjected to heavy industrial pollution. Gas atmosphere test (Method 1) A justification of the tests is given in Annex A. BS EN 504836:2020 EN 504836:2020 – 7 – Principle This test exposes samples to a humiditysaturated atmosphere rich with sulphur dioxide (initial concentration SO2: 0,066 7 % (667 parts per million by volume)) with defined conditions of temperature and pressure. Test equipment The samples and supports shall be installed in a hermetic test chamber, with a humiditysaturated atmosphere in the presence of sulphur dioxide. This test chamber shall be made of inert material. The test shall be made in accordance with EN ISO 3231. Preparation of SO2 atmosphere After closing the chamber, sulphur dioxide (concentration = 0,066 7 %) shall be introduced from either a gas bottle or using a specific reaction in the chamber as described in Annex B. Procedure Each period, or basic module, shall prise a weekly sequence. 7 cycles of 24 h (168 h total), each cycle includes an 8 h exposure with saturated humidity and high sulphur dioxide atmosphere (a total exposure of 56 h), and a 16 h exposure at the laboratory atmosphere (a total exposure of 112 h). NOTE Exposure to laboratory atmosphere may be achieved by opening the chamber door. It is the intention of this phase to allow clean air to circulate around the test samples. During the 8 h period, the temperature is raised to (40 177。 3) 176。 C. During the 16 h period the chamber remains at ambient temperature and finally the water and sulphur dioxide atmosphere is renewed to the concentration as specified in . Cleaning W hen the specimens are exposed successively to a neutral salt spray and then to a humidity saturated atmosphere with sulphur dioxide, the procedure shall be 7 cycles of 24 h in salt, no cleaning, 7 cycles of 24 h in sulphur dioxide, cleaning in accordance with . Gas atmosphere test (Method 2) Procedure The test samples shall be subjected to a cyclic corrosion test consisting of 1 h period of drying and 1 h period of fog. The test shall consist of 500 cycles (1 000 h). The fog period shall be at ambient temperature, while the drying time shall be at a higher temperature. NOTE Experience indicates that longer cycle times may produce slower degradation. Test equipment The apparatus for salt spray (fog) testing consists of a fo。