IEEE C57.12.56

IEEE C57.12.56 – IEEE Standard Test Procedure for Thermal Evaluation of Insulation Systems for Ventilated Dry-Type Power and Distribution Transformers

New IEEE Standard – Superseded.This IEEE Standards product is part of the C57 family on Power Distribution and Regulating Transformers. A test procedure for determining the temperature classification of ventilated dry-type power and distribution transformer insulation systems by test rather than by chemical composition is established. The intent is to provide a uniform method for providing data for selection of the temperature classification of the insulation system, for providing data that may be used as a basis for a loading guide, and for comparative evaluation of different insulation systems. Voltage-withstand endpoint criteria are related to the impulse voltage distribution within the coil or to the initial voltage-withstand of the coil. A relationship between impulse withstand of the insulation and short-term 60-Hz-withstand is identified so that 50/60–Hz testing of model coils is possible.

Product Details

Published:

10/03/1986

ISBN(s):

9780738108636

Number of Pages:

18

File Size:

1 file , 170 KB

Product Code(s):

STDSU10306

Note:

This product is unavailable in Russia, Belarus