MT 21 - TC 27/MT 21

IEC 60519-4:2013 provides particular safety requirements for electric arc furnace installations and its operating and maintenance personnel. These safety provisions concern the protection of persons and the environment against dangers of electrical origin and also against certain dangers of non-electrical origin. This fourth edition cancels and replaces the third edition published in 2006. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- The structure has been amended and adjusted to IEC 60519-1:2010;
- The classification (Clause 4) has been adapted to details with respect to secondary voltage in electric arc furnace installations;
- All provisions have been redrafted and the text is more concise with respect to EAF;
- Annexes AA, BB and CC have been restructured, with respect to details concerning high voltage designs and non-electrical issues, however to be aware of in those installations.
This publication is to be read in conjunction with IEC 60519-1:2010.

IEC 60676:2011 specifies test procedures, conditions and methods according to which the main parameters and the main operational characteristics of electric arc furnaces (EAF) operated either with alternating current (EAFac) or with direct current (EAFdc) with a capacity above 500 kg/heat are established. This third edition cancels and replaces the previous edition published in 2002 and constitutes a technical revision. Significant technical changes with respect to the previous edition are as follows:
- Clause 1 (Scope and object) - types of furnaces are more clearly defined.
- Clause 2 (Normative references) and Clause 3 (Terms and definitions) have been updated and completed.
- New Clause 4 (Features of the EAFsystem) has been added; it mainly concentrates on the tests necessary for high-voltage / high-current electrical equipment in the installation.
- Clause 5 (Type of tests and general conditions of their performance) and Clause 6 (Technical tests) have been modified according to today's requirements for safe operation of an EAF.

IEC 60683:2011 specifies test procedures, conditions and methods according to which the main parameters and the main operational characteristics of a submerged-arc furnace (SAF) with rated electrical power levels above 500 kVA are established. This standard is applicable to SAF with one or more electrodes. In order to determine further technical or economic assessments, additional tests may be necessary. Tests for some special equipment for semiconductor converter controlled furnaces, such as controlled rectifiers or controlled a.c. converters, are covered by IEC 60146-1-1. This second edition cancels and replaces the previous edition published in 1980 and constitutes a technical revision. Significant technical changes with respect to the previous edition are as follows:
- Clause 1 (Scope and object) - the types of furnaces covered by this standard are more clearly defined.
- Clause 2 (Normative references) and Clause 3 (Terms and definitions) have been updated and completed.
- A new Clause 4 (Features of the SAF sytem) has been added; it mainly concentrates on the tests necessary for high voltage/high current electrical equipment in the installation.
- Clause 5 (Tests and general conditions) and Clause 6 (Technical tests) have been modified according to today's requirements for safe operation of a SAF.

IEC 82079-1:2012 provides general principles and detailed requirements for the design and formulation of all types of instructions for use that will be necessary or helpful for users of products of all kinds, ranging from a tin of paint to large or highly complex products, such as large industrial machinery, turnkey based plants or buildings. This first edition cancels and replaces IEC 62079 published in 2001. It constitutes a technical revision. It has the status of a horizontal standard in accordance with IEC Guide 108.