Elektroizolační materiály a systémy

Komise : IEC/TC 112 (Evaluation and qualification of electrical insulating materials and systems)
Původce: ISO\IEC\CEN\CENELEC
K připomínkám do: 27.08.2019
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This document is applicable to multifactor evaluation of an EIS for applications where the stresses of the application are a combination of the factors identified in IEC 60505. The severe operating conditions are expected to occur during operation at elevated temperatures.

This document establishes the procedure to evaluate the influence of stresses on the performance established following the thermal classification of the EIS. The thermal classification is established in Step 1 where the only ageing factor is thermal. The candidate EIS is first evaluated based on thermal stress only. This evaluation is defined as the baseline of the candidate EIS. In Step 2, the evaluation of the additional factors applied at elevated temperatures provides the measurement needed to establish the influence of the additional factors on the performance of the baseline EIS.

This document is about thermal endurance testing with one or more stress factors added during the thermal ageing process. It provides guidance regarding interpretation of the test results.

The performance of any product designed and constructed using the EIS established in accordance with this document shall be evaluated in accordance with the application requirements set by the appropriate IEC Technical Committee.

Komise : IEC/TC 112 (Evaluation and qualification of electrical insulating materials and systems)
Původce: ISO\IEC\CEN\CENELEC
K připomínkám do: 18.09.2019
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This document describes a test procedure for the thermal evaluation of an electrical insulation system [EIS] for use in dry-type transformers operating at voltages of 1 kV and above.

This Standard describes an evaluation procedure of an EIS to be used for coils constructed using the same EIS with insulation thickness being adjusted to maintain the Voltage Stress Level [VSL] at or below the tested values of the established EIS.

When the transformer is constructed with multiple high voltage windings using different electrical insulation systems, each of these windings shall be evaluated using this procedure. 

The performance of any transformer designed and constructed using the EIS established in accordance with this document shall be evaluated in accordance with the application requirements set by the appropriate IEC Technical Committee.