DANSK DSF/ISO/FDIS 18095 PDF

This International Standard gives guidelines for the monitoring techniques to be considered when setting up a condition monitoring programme for power transformers and includes references to associated standards required in this process. It is intended to help in the implementation of a coherent condition monitoring and condition based maintenance programme such as described following ISO 17359. This International Standard is applicable to single-phase alternating current power transformers of ≥ 1 kVA and three phase alternating current power transformers of ≥ 5 kVA. This International Standard is aimed at asset managers, equipment specifiers, owners, operators, reliability and maintenance engineers. It provides a selection process "road map" accessible to nonspecialists. The parameters and techniques are directed towards best -practice condition based maintenance, detecting fault conditions, directing maintenance decisions and estimation of asset health. It is principally aimed at people who are not transformer experts, but who may have a small number of transformers for example supplying power into a manufacturing site where many other items of equipment depend on the power continuing to be supplied by the transformers. The upper limit for the size of such transformers is probably around 50 MVA. Whilst the same principles will also apply to owners and operators of large numbers of transformers such as utilities, which may exceed 50 MVA, it is expected that they will already have their own internal company guidelines and procedures for monitoring their transformers and so are not the primary target of this standard.