Electrical insulation systems. Thermal evaluation of modifications to an established electrical insulation system (EIS) - Form-wound EIS
Electrical insulation systems. Thermal evaluation of modifications to an established electrical insulation system (EIS) - Form-wound EIS
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1 Scope This part of IEC 61858 lists the required test procedures for qualification of modifications of an established electrical insulation system ( EIS ) with respect to its thermal classification. This standard is applicable to EIS used in form-wound electrotechnical devices. The test procedures are comparative in that the performance of a candidate EIS is compared to that of a reference EIS , which has proven service experience in accordance with IEC 60505 or has been evaluated by one of the procedures given in IEC 60085 and IEC 60034‑18‑31.
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