IEC 60216-5 Electrical insulating materials – Thermal endurance properties – Part 5: Determination of relative thermal endurance index (RTE) of an insulating material

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IEC 60216-5 Document Information:

Title
Electrical insulating materials – Thermal endurance properties – Part 5: Determination of relative thermal endurance index (RTE) of an insulating material

Matériaux isolants électriques – Propriétés d'endurance thermique – Partie 5: Détermination de l’indice d’endurance thermique relatif (RTE) d’un matériau isolant

International Electrotechnical Commission

Publication Date:
Mar 1, 2008

Scope:

This part of IEC 60216 specifies the experimental and calculation procedures to be used for deriving the relative thermal endurance index of a material from experimental data obtained in accordance with the instructions of IEC 60216-1 and IEC 60216-2. The calculation procedures are supplementary to those of IEC 60216-3.

Guidance is also given for assessment of thermal ageing after a single fixed time and temperature, without extrapolation.

The experimental data may in principle be obtained using destructive, non-destructive or proof tests, although destructive tests have been much more extensively employed. Data obtained from non-destructive or proof tests may be “censored”, in that measurement of times taken to reach the endpoint may have been terminated at some point after the median time but before all specimens have reached end-point (see 3.1 of IEC 60216-3).

Guidance is given for preliminary assignment of a material to an insulation class, based upon the thermal ageing performance.

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