A fire scenario-related evaluation of different types of transformers and the standards governing their classification and installation

The author sets out to show that the standards´ impasse we are experiencing in the field of power and distribution transformers is due to the fact that standards committees are still asking the old askarel questions: `Is it flammable or nonflammable?´ Instead, in the context of the possibility of fire causation by a dielectric fluid, for both practical and criteriological reasons, the question should be whether the liquid is actually capable of maintaining a transient flame and thus capable of propagating a fire. If the author follows the argument that `nonflammable´ should be replaced by the much more relevant notion of `nonpropagating´-and the test results shown make it difficult not to agree-then the author must set in motion the necessary procedures at IEC and CENELEC level