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Power transformers - Part 25: Neutral grounding resistors (IEC 60076-25:2023); German version EN IEC 60076-25:2023

Standard [CURRENT]

DIN EN IEC 60076-25:2024-05

VDE 0532-76-25:2024-05

Power transformers - Part 25: Neutral grounding resistors (IEC 60076-25:2023); German version EN IEC 60076-25:2023

German title
Leistungstransformatoren - Teil 25: Sternpunkt-Erdungswiderstände (IEC 60076-25:2023); Deutsche Fassung EN IEC 60076-25:2023
Publication date
2024-05
Original language
German
Pages
29

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Publication date
2024-05
Original language
German
Pages
29

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Overview

This part of IEC 60076 applies to dry type natural air-cooled resistors, for neutral grounding of transformers and generators, in order to limit the earth fault current in power systems by means of metallic resistive elements. Unless otherwise specified, this document applies to transformers operated under the conditions specified in IEC 60076-1 for normal operation. Restrictions also apply to use at altitudes above 1 000 m above normal sea level. In this case, corrections to the insulation levels in accordance with IEC 60071-2 shall be taken into account. This document helps to define requirements for neutral grounding resistors. In particular, it provides guidance on requirements regarding operating conditions, the corresponding tests, and labeling.

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