+AMD1:2012 CSV 填充矿物油的电气设备.溶解气体分析（DGA）在电气设备工厂试验中的应用

[中文适用范围]： This International Standard specifies oil-sampling procedures, analysis requirements and procedures, and recommends sensitivity, repeatability and accuracy criteria for the application of dissolved gas analysis (DGA) to factory testing of new power transformers, reactors and instrument transformers filled with mineral insulating oil when DGA testing has been specified. The most effective and useful application of DGA techniques to factory testing is during the performance of long-term tests, typically temperature-rise (heat run) and overloading tests on power transformers and reactors, also impulse tests on instrument transformers. DGA may also be valuable for over-excitation tests run over an extended period of time. Experience with DGA results, before and after short-time dielectric tests, indicates that DGA is normally less sensitive than electrical and acoustic methods for detecting partial discharges. However, DGA will indicate when these partial discharges become harmful to the insulation and may be detected by inspection. La présente Norme internationale spécifie les modes opératoires d'échantillonnage des huiles, les exigences analytiques et les procédures, et recommande les critères de sensibilité, de répétabilité et de précision pour l'application de l'analyse des gaz dissous (AGD) aux essais en usine des transformateurs de puissance neufs, des bobines d'inductance et des transformateurs de mesure, dans le cas où le cahier des charges prévoit des essais d'analyse des gaz dissous (AGD). L'application des techniques d'AGD la plus utile et la plus efficace, au cours des essais en usine, est celle pratiquée pendant les essais de fonctionnement de longue durée, particulièrement les essais de surcharge et d'échauffement des transformateurs de puissance et des bobines d'inductance, ainsi que les essais au choc de foudre sur les transformateurs de mesure. L'analyse des gaz dissous peut être aussi valable pour les essais de surecitation effectués pendant une période de temps prolongée. L'expérience acquise avec les résultats de l'AGD, avant et après les essais diélectriques de courte durée, montre que, l'analyse des gaz dissous, est moins sensible que les méthodes électriques et acoustiques pour la détection des décharges partielles. Cependant, l'AGD indiquera quand ces décharges deviennent dangereuses pour l'isolation et peuvent être détectées par inspection. [外文原描述]： IEC 61181:2007+A1:2012 Specifies oil-sampling procedures, analysis requirements and procedures, and recommends sensitivity, repeatability and accuracy criteria for the application of dissolved gas analysis (DGA) to factory testing of new power transformers, reactors and instrument transformers filled with mineral insulating oil when DGA testing has been specified. The most effective and useful application of DGA techniques to factory testing is during the performance of long-term tests, typically temperature-rise (heat run) and overloading tests on power transformers and reactors, also impulse tests on instrument transformers. DGA may also be valuable for over-excitation tests run over an extended period of time. Experience with DGA results, before and after short-time dielectric tests, indicates that DGA is normally less sensitive than electrical and acoustic methods for detecting partial discharges. However, DGA will indicate when these partial discharges become harmful to the insulation and may be detected by inspection [2]. This edition includes the following significant technical changes with respect to the previous edition: a) the specific procedures used during factory tests (sampling location, sampling frequency, gas extraction and chromatographic analysis in the laboratory) are described in more detail; b) information is provided in Annex A concerning the residual gas contents recommended before thermal tests on power transformers, typical gas values observed during the tests and cases where gas formation during the tests was followed by problems in the transformers; c) typical values observed during chopped lightning-impulse tests on instrument transformers are indicated in Annex B. This consolidated version consists of the second edition (2007) and its amendment 1 (2012). Therefore, no need to order amendment in addition to this publication.