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  • BSI
    BS IEC 60076-21:2018 Power transformers - Standard requirements, terminology, and test code for step-voltage regulators
    Edition: 2018
    $569.57
    / user per year

Description of BS IEC 60076-21:2018 2018

IEC 60076-21:2018 describes electrical, mechanical and test requirements of liquid-immersed, single- and three-phase, 50 Hz and 60 Hz, self and forced-air cooled, distribution, overhead and substation, step-voltage regulators, 1 000 kVA (single-phase units) or 3 000 kVA (three-phase units) and smaller, 34 500 volts and below (2 400 V minimum) and their associated controls. Requirements, references and definitions relevant to either IEC or IEEE contexts are given and their use is described in Clause 4. This publication is published as an IEC/IEEE Dual Logo standard. This second edition cancels and replaces IEC 60076-21, published in 2011, and IEEE Std C57.15-2009. This edition includes the following significant technical changes with respect to IEC 60076­21:2011/IEEE Std C57.15-2009:
a) updated list of normative and bibliography IEC and IEEE references and their associated text;
b) updated tables of preferred ratings for inclusion of  maximum system voltage ( U m), nominal system voltage and rated voltage ( U r);
c) inclusion of tables for optional fan-cooled ratings, external dielectric clearances and sound pressure levels;
d) revision of short-circuit requirements for distribution and substation voltage regulators;
e) inclusion of an universal interface between control enclosure and apparatus;
f) inclusion of  tap-changer routine and type tests;
g) inclusion of audible sound pressure emissions test procedures;
h) inclusion of tank enclosure integrity type test procedures;
i) update of control environmental IEC reference test standard.
Keywords: step-voltage regulators

Standard NumberBS IEC 60076-21:2018
TitlePower transformers - Standard requirements, terminology, and test code for step-voltage regulators
StatusUnder Review
Publication Date2018-12-19
ReplacesBS IEC 60076-21:2011
Identical National Standard OfIEC 60076-21:2018
DescriptorsFrequency analyzers, Recording instruments (measurement), Amplitude, Measurement, Terminology, Frequency response, Ratios, Power transformers
ICS29.180 Transformers. Reactors
CommitteePEL/14
ISBN978 0 580 93227 4
PublisherBSI
Pages148

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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