电气绝缘油中芳香烃检测方案(红外光谱仪)

INFRARED FOURIERSPECTROMETERWWW.LUMEX.BIZ DETERMINATION OF AROMATIC HYDROCARBONS IN ELECTRICALINSULATING OILS GOST 28640-90 (IEC 60590-77)DIN IEC 60590-1986-09 INTRODUCTION One of the most widespread liquid electrical insulating materials is transformer oil. It is used to fill the poresin the fiber insulation and the space between the windings， thereby increasing the dielectric strength of theinsulation and improving the heat removal from the windings and the core of a transformer. The oil is alsoused in high-voltage current breakers. The most important quality parameters of insulating oils are theirdielectric properties， fast heat transfer and moisture resistance. The insulating oil is produced during crude oil refining， and the foreign impurities should be removed from theoil distillate， in particular， aromatic hydrocarbons that decrease oil resistance to oxidation， its dielectricalproperties and fluidity at low temperatures. Therefore， regulations impose limit on the concentration ofaromatic hydrocarbons in the electrical insulating oils. The infrared spectroscopic methods provide monitoring of the aromatic hydrocarbon content in insulating oilsin a range of 1.2-60%. Basing on the results of analysis， one can promptly respond to degradation of thequality parameters during the process of oil production， as well as ensure the high quality of the final productand prove-in performance. Infrared spectroscopy may also be used for quality control of mineral insulating oil. EQUIPMENT AND REAGENTS FOR ANALYSIS The following equipment and reagents are used for analysis： Fourier-Transform Infrared spectrometer InfraLUMFT-08 (with software)； Sealed liquid cell of fixed path length (from 0.05 to 0.3 mm)， the path length should be chosen according to the expected concentration of aromatic hydrocarbons in the analysed sample； Personal computer ADVANTAGES OF InfraLUM@ FT-08 SPECTROMETERS Easy to operate High selectivity Spectrum scanning is just one minute No sample pretreatment needed Various accessories may be used for analysis MEASUREMENTMETHOD A sealed liquid cell is filled with the analysed sample and is installed in the cell compartment of an InfraLum@FT-08 FTIR spectrometer. Infrared spectrum of the sample is recorded in the range of 1700-1500 cm， withresolution of 2 cm"and scanning time of 60 s. Edit Project 2D View Library InfraLum EXAMPLE OF A REAL ANALYSIS File maslo 0.75T0.6- 0.45- < D× 1600 1/cm 1550 The contents of this paper are subject to change without notice. C1553.834595 [1/cm].0.336146 [T] Department： PPO-2 The information in this leaflet is supplemental. To get more specific information on this method， please contact the developer of this application Lumex Ltd.     应用最广泛的液体电气绝缘材料之一是变压器油。它用于填充纤维绝缘中的孔隙和绕阻之间的空间，从而增加绝缘的介电强度，并改善变压器绕组和铁芯的热去除。该油还用于高压断路器。绝缘油最重要的质量参数是其介电性能、快速传热和耐湿性。    在原油精炼过程中产生绝缘油，从油馏分中除去杂质，特别是降低耐油氧化性的芳烃在低温下的介电性能和流动性。因此，法规限制了电气绝缘油中芳香烃的浓度。       红外光谱法提供了绝缘油中芳烃含量在1.2～60%范围内的监测。在分析结果的基础上，可以及时响应生产过程中的质量参数的劣化，保证最终产品的高质量，并在性能上得到证明。红外光谱法也可用于矿物绝缘油的质量控制。