BS IEC 60076-7:2018 - Power transformers. Loading guide for mineral-oil-immersed power transformers

BS IEC 60076-7:2018

Power transformers. Loading guide for mineral-oil-immersed power transformers

Status : Current, Under review   Published : February 2018



IEC 60076-7:2018 is now available as

IEC 60076-7:2018 RLV

which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.

IEC 60076-7:2018 is applicable to mineral-oil-immersed transformers. It describes the effect of operation under various ambient temperatures and load conditions on transformer life. This document provides guidance for the specification and loading of power transformers from the point of view of operating temperatures and thermal ageing. It provides recommendations for loading above the nameplate rating and guidance for the planner to choose appropriate rated quantities and loading conditions for new installations. This edition includes the following significant technical changes with respect to the previous edition:

a) title has been updated from "oil-immersed power transformers" to "mineral-oil-immersed transformers";

b) insulation life is updated by considering latest research findings;

c) temperature limits have been reviewed and maximum core temperature is recommended;

d) number of fibre optic sensors is recommended for temperature rise test;

e) Q, S and H factors are considered;

f) thermal models are revised and rewritten in generally applicable mathematical form;

g) geomagnetic induced currents are briefly discussed and corresponding temperature limits are suggested;

h) extensive literature review has been performed and a number of references added to bibliography.

Standard NumberBS IEC 60076-7:2018
TitlePower transformers. Loading guide for mineral-oil-immersed power transformers
StatusCurrent, Under review
Publication Date14 February 2018
Normative References(Required to achieve compliance to this standard)IEC 60076-2, IEC 60076-14
Informative References(Provided for Information)C57.100-2011, IEEE Std C57.119-2001, IEEE 1538:2000, CIGRE WG A2.38, CIGRE WG A2.35, IEC 60076-5, CIGRE WG A2.24, CIGRE SC 12, IEEE Std C57.91:2011, CIGRE TF D1.01.10, ASTM D982 - 16, IEC 60076-2:1993, IEC 60214-1:2014, IEC 60076-1:2011, IEC 62770:2013, IEC 60354:1991
ReplacesBS IEC 60076-7:2005
International RelationshipsIEC 60076-7:2018
DescriptorsDeterioration, Power transformers, Temperature, Electric load, Mathematical calculations, Overload (electric), Transformers, Electrical equipment, Overload protection, Oil-immersed transformers, Rated current, Ratings, Temperature rise, Oil-cooled systems, Rated power, Oil-filled electrical equipment, Windings, Life (durability), Ageing (materials), Thermal stability
ISBN978 0 580 89555 5
File Size2.047 MB

 Your basket
Your basket is empty

Multi-user access to over 3,500 medical device standards, regulations, expert commentaries and other documents

Collaborate, Innovate, Accelerate.

Tracked Changes

Understand the changes made to a standard with our new Tracked Changes version


The faster, easier way to work with standards