Page 99 - Industrial Power Engineering and Applications Handbook

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Relevant Standards

IEC Title IS BS
60076- 1/1993 Power transformers - General Specification for 2026- 11199 1 BS EN 60076-1/1997
tapping and connections

Notes
1 In the tables of relevant Standards in this book while the latest editions of the standards are provided, it is possible that revised editions
have become available. With the advances of technology and/or its application, the updating of standards is a continuous process by
different standards organizations. It is therefore advisable that for more authentic references, readers should consult the relevant
organizations for the latest version of a standard.
2 Some of the BS or IS standards mentioned against IEC may not be identical.
3 The year noted against each standard may also refer to the year of its last amendment and not necessarily the year of publication.

List of formulae used kV = applied voltage
kVA(,-,,, = continuous rating of the autotransformer

Tapping of autotransformer = 42 . 100% (4.1)
Further reading
ZAT = starting current on an autotransformer switching
ZDoL = starting current on a DOL switching Byatt, J.R., Selection of Primary Starters for Cage Motors and
Secondary Star?ers for Slip-ring Motors, AOIP Electrical, UK.
Rating of autotransformer Kajiji, Y.H., Liquid Resistance Starting, AOYP Engineering Co.
(P) Ltd, Mumbai, India.
.
I<VA(,,,, = 8 kV ' I,, (4.2) Werninck, E.H. (ed.), Electric Motor Hand Book.