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OELCHECK: Dielectric dissipation factorYear of publication: . Test standard: IEC , ASTM D Measuring range: tan δ up to x- Sample volume: ml Determined: Dissipation factor tan δ relative dielectric constant εr. The dielectric dissipation factor tan δ measured with a Baur DTL-C provides information on the extent of dielectric losses in the transformer oil occurring during

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