MT 4 - TC 14/MT 4

IEC 60076-14:2013 applies to liquid-immersed power transformers employing either high-temperature insulation or combinations of high-temperature and conventional insulation, operating at temperatures above conventional limits. It is applicable to:
- power transformers in accordance with IEC 60076-1;
- convertor transformers according to IEC 61378 series;
- transformers for wind turbine applications in accordance with IEC 60076-16;
- arc furnace transformers;
- reactors in accordance with IEC 60076-6. This part of IEC 60076 may be applicable as a reference for the use of high-temperature insulation materials in other types of transformers and reactors. This first edition of IEC 60076-14 cancels and replaces the second edition of the Technical Specification IEC/TS 60076-14 published in 2009. It constitutes a technical revision.

IEC 60050-445:2010 defines terms related to specified-time relays. This second edition cancels and replaces the first edition published in 2002 and constitutes a technical edition. This new edition has been revised in order to:
- incorporate terms more commonly used by industry;
- incorporate timing charts to help explain definitions involving a sequence of operations.
It has the status of a horizontal standard in accordance with IEC Guide 108.

Provides design, testing and loading information for use by both the manufacturer and user of liquid-immersed power transformers using either high-temperature insulation or combinations of high-temperature and conventional insulation.

covers the requirements for flexible and semi-flexible radiating coaxial communication cables. It specifies preferred ratings and characteristics for radiating cables and enables selection of the appropriate tests and performance levels from the generic specification for inclusion in the detail specification.

IEC 60076-14:2009(E) provides specification, design, testing and loading information for use by both the manufacturer and user of liquid-immersed power transformers employing either high-temperature insulation or combinations of high-temperature and conventional insulation. Is applicable to:
- power transformers designed in accordance with IEC 60076-1,
- convertor transformers designed to IEC 61378 series,
- arc furnace transformers,
- and covers the use of various liquid and solid insulation combinations. This new edition includes the following significant technical changes with respect to the previous edition:
- enhancement of insulation system descriptions;
- clarification of temperature rise limits
- and the addition of overload temperature limits.

Is concerned with the classification of hazardous areas where flammable gas or vapour risks may arise, in order to permit the proper selection and installation of apparatus for use in such hazardous areas.