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EVS-EN 60137:2017

Insulated bushings for alternating voltages above 1 000 V

General information
Valid from 01.12.2017
Base Documents
IEC 60137:2017; EN 60137:2017
Directives or regulations
None
Standard history
Status
Date
Type
Name
18.09.2018
Corrigendum
01.12.2017
Main
05.12.2008
Main
IEC 60137:2017 specifies the characteristics and tests for insulated bushings. This standard is applicable to bushings, as defined in Clause 3, intended for use in electrical apparatus, machinery, transformers, switchgear and installations for three-phase alternating current systems, having highest voltage for equipment above 1 000 V and power frequencies of 15 Hz up to and including 60 Hz. Subject to special agreement between purchaser and supplier, this standard may be applied, in part or as a whole, to the following: - bushings used in other than three-phase systems; - bushings for high-voltage direct current systems; - bushings for testing transformers; - bushings for capacitors. Special requirements and tests for transformer bushings in this standard apply also to reactor bushings. This standard is applicable to bushings made and sold separately. Bushings which are a part of an apparatus and which cannot be tested according to this standard should be tested with the apparatus of which they form part. This edition includes the following significant technical changes with respect to the previous edition: - Resin-impregnated synthetic (RIS) bushings has been introduced. - Bushings with Um ≤ 1,1 kV, Um = 1100 kV and Um = 1200 kV have been introduced. - Temperature rise testing has been included for liquid-insulated bushings according to clause to 3.4. - Introducing dry lightning impulse testing as a routine test for all transformer bushings with Um > 72,5 kV. - The altitude correction procedure has been revised (> 1 000 m). - An explanation about Very Fast Transient (VFT) phenomenon and its impact on bushings has been included.
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