CLC/SR 27 - Industrial electroheating equipment

IEC 60676:2024 This document specifies the basic test procedures, conditions and methods for establishing the main performance parameters and the main operational characteristics of furnaces for direct arc heating, forming arcs between the electrode and metal, such as electric arc furnaces using alternating current (EAF AC) or direct current (EAF DC), and ladle furnaces (LF), with rated power level above 500 kVA . This fourth edition cancels and replaces the third edition published in 2011. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) The structure has been redrafted according to IEC 60398:2015. b) The scope has been redrafted. c) The terms/definitions, normative references and bibliography have been updated and completed. d) The test methods and content from IEC 60398:2015 have been confirmed, replaced, or complemented with regards to direct arc furnaces (EAF, LF). e) The annexes from IEC 60398:2015 have been confirmed, replaced, or complemented with regards to direct arc furnaces (EAF, LF).

IEC 63078:2019 specifies the test procedures, conditions and methods for determining the main performance parameters and operational characteristics of induction through-heating installations. Measurements and tests that are solely used for the verification of safety requirements of the installations are outside the scope of this document and are covered by IEC 60519-1 and IEC 60519-3.

This part of IEC 60519 is applicable to equipment using high frequency or microwave energy alone or in combination with other kinds of energy for industrial heating and processing of materials. It is also applicable to HF and MW generators made available to users as separate units. This part is applicable to equipment operating in the frequency range 3 MHz to 300 GHz, with the following limitations. - This document applies to only high frequency dielectric heating and processing as defined in 3.1.103. It does not apply to induction heating, which it is possible to carry out in the lower part of the specified frequency band and is covered by IEC 60519-3, with magnetic field safety aspects addressed in IEC TS 62997:2017, the latter to be replaced by a technical report (TR) or by a revised technical specification (TS). - The ISM centre frequencies for dielectric heating and processing of industrial interest are narrow bands about 6,78 MHz, 13,56 MHz, 27,12 MHz and 40,68 MHz. Different field emission measurement procedures and limiting values are applicable, depending on the processing frequency in the high frequency range 3 to 300 MHz. Specifications are in Annex BB. - This document specifies limits for microwave emission only for the ISM frequencies between 800 MHz and 6 MHz, as specified in Annex CC. For other microwave frequencies the basic restriction and IEC 62311 apply. - The foundations for compliance with emission values are the basic restrictions, referred to in the IEEE/ANSI C95.1:2019 and Directive 2013/35/EU. However, maximum HF processing frequency electric and magnetic field values are taken from the IEEE/ANSI C95.1:2019 standard, as indicated in Annex BB. - This document is not applicable to: -- appliances for household and similar use (covered by e.g. IEC 60335-2-25); -- commercial use (covered by IEC 60335-2-90 and IEC 60335-2-110); -- laboratory use (covered by IEC 61010-2-010); -- medical high frequency equipment and accessories (covered by IEC 60601-2-2). NOTE 101 Since high frequency and microwave tunnel ovens and also some other types of microwave and high frequency equipment are sometimes intended either for commercial, laboratory or industrial use, the following criteria are suitable for determination of the classification as industrial equipment: - commercial equipment is typically designed and planned for series production of many identical units, whereas industrial equipment is typically produced in small series or even as single units. The processed goods are consumed or ready for final use at the end of the heating process. - laboratory heating equipment is for preparing material in a laboratory environment, and the processed material is immediately available for investigations or further processing. Regular production of large quantities of material is not foreseen. - with industrial equipment, the processed goods are not immediately accessible to the end user, and the goods are sometimes not in a final state from the perspective of the end user.

This part of IEC 60519 provides particular safety requirements for arc furnace installations. This document deals with the significant hazards, hazardous situations or hazardous events relevant to industrial arc furnace installations, as listed in Annex A, for normal operation and for single fault condition as well as under conditions of reasonably foreseeable misuse. This document specifies the requirements intended to be met by the manufacturer to ensure the safety of persons and property during the complete life cycle of the equipment from design through commissioning, operation, maintenance, inspection, to decommissioning, as well as in the event of foreseeable single fault condition that can occur in the equipment. The rated voltage of arc furnace installation can be in the range of low voltage or high voltage, details are given in 4.2. This standard is applicable to arc furnace installations such as: a) furnaces for direct arc heating, forming arcs between the electrode and metal such as the electric arc furnace using alternating current (EAF AC) or direct current (EAF DC), and the ladle furnace (LF); b) furnaces for arc-resistance heating forming arcs between the electrode and the charge material or heating the charge material by the Joule effect, such as the submerged arc resistance furnace using alternating current (SAF AC), or direct current (SAF DC). NOTE In some documents the terms smelter or electrical reduction furnace are used. Furnace installation for unattended operation is not covered by this standard. This document does not provide requirements for type testing. NOTE Industrial equipment covered by this document is typically produced as a single unit or a very small number of units; such unit usually has a very high value and can cause severe harm at disintegration. This document does not address data security and hazards arising from neglect of security. With respect to noise of electrical an arc furnace, ISO 13578:2017, 6.1.23 applies.

IEC 60519-12:2016 specifies safety requirements for industrial electroheating equipment and installations in which infrared radiation – usually generated by infrared emitters – is significantly dominating over heat convection or heat conduction as means of energy transfer to the workload. A further limitation of the scope is that the infrared emitters have a maximum spectral emission at longer wavelengths than 780 nm in air or vacuum, and are emitting wideband continuous spectra such as by thermal radiation or high pressure arcs. This second edition cancels and replaces the first edition published in 2013. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a. the structure has been redrafted according to IEC 60519-1:2015; b. terms/definitions, normative references and bibliography have been updated and completed; c. all requirements and content from IEC 60519-12:2013 that have been included in IEC 60519-1:2015 have been removed to avoid any duplication.

IEC 60779:2020 specifies the test procedures, conditions and methods for determining the main performance parameters and operational characteristics of electroslag remelting furnaces. Measurements and tests that are solely used for the verification of safety requirements of the installations are outside the scope of this document and are covered by IEC 60519-1 and IEC 60519-8. This third edition cancels and replaces the second edition published in 2005. It constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: - the structure has been redrafted according to IEC 60398:2015; - the scope and object have been redrafted; - the terms/definitions, normative references and bibliography have been updated and completed; - all test methods and content from IEC 60779:2005 that have been included in IEC 60398:2015 have been removed to avoid any duplication.

IEC 60519-8:2020 specifies particular safety requirements for electroslag remelting equipment and installations. This document specifies safety requirements applicable to mainly electroheating installations for remelting and, in some cases, for refining processes of metals through direct resistance heating of a conductive slag. The object of this document is to specify the particular requirements for the safety of persons in or around an electroslag remelting furnace. The general requirements are included in IEC 60519-1. This third edition cancels and replaces the second edition published in 2005. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) the structure has been redrafted according to IEC 60519-1:2020; b) the Scope has been redrafted; c) the terms and definitions, normative references and bibliography have been updated and completed; d) all requirements and content from IEC 60519-8:2005 that have been included in IEC 60519‑1:2020 have been removed to avoid any duplication.

IEC 60519-1:2020 is available as IEC 60519-1:2020 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.IEC 60519-1:2020 specifies the general safety requirements for industrial installations or equipment intended for electroheating (EH) and electroheating based treatment technologies as well as for electromagnetic processing of materials (EPM). This document deals with the significant hazards, hazardous situations or hazardous events relevant to industrial EH and EPM equipment, as listed in Annex A, for normal operation and for single fault condition as well as under conditions of reasonably foreseeable misuse. This sixth edition cancels and replaces the fifth edition published in 2015. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: - removal of noise from the scope; - clarification of EMC requirements; - risk classification of hazards based on emission for all processing frequencies; - clarification of boundaries between IEC 60519 (all parts) and ISO 13577 (all parts).

IEC 60398:2015 specifies the basic test procedures, conditions and methods for establishing the main performance parameters and the main operational characteristics of industrial installations and equipment intended for electroheating (EH) or electromagnetic processing of materials (EPM). This third edition cancels and replaces the second edition of IEC 60398 published in 1999 and the first edition of IEC TS 62796 published in 2013. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: - the title and scope of the standard have been expanded to include installations and equipment for electromagnetic processing of materials; - the requirements have been restructured; - tests concerning safety have been moved to IEC 60519-1; - new tests and clauses addressing energy efficiency considerations have been added; - a new annex placing this standard in the context of energy efficiency assessment as developed by ISO and IEC has been added; - new annexes addressing visual display of data, estimation of energy use and energy recoverability of fluids have been added.

IEC 62798:2014 specifies test procedures, conditions and methods according to which the main parameters and the main operational characteristics of industrial infrared emitters are established. A limitation of the scope of this standard is that the infrared emitters have a maximum spectral emission at longer wavelengths than 780 nm in air or vacuum, and are emitting wideband continuous spectra such as by thermal radiation or high pressure arcs.

IEC/TS 62395-2:2008 provides detailed recommendations for the system design, installation, maintenance and repair of electrical resistance trace heating systems in industrial and commercial applications. Pertains to trace heating systems that may comprise either factory constructed or field (work-site) assembled units, and which may be series heater cables, parallel heater cables, heater pads or heater panels that have been assembled and/or terminated in accordance with the manufacturer's instructions for connection to voltage supplies up to and including 450 V/750 V.

IEC 62395-1:2013 specifies requirements for electrical resistance trace heating systems and includes general test requirements. This second edition cancels and replaces the previous edition published in 2006 and constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: - Tests have been added for trace heating on sprinkler systems; - The flammability test has been changed to align with the latest draft of future IEC/IEEE 60079-30-1; - A supplementary test has been added for the verification of sheath temperature using trace heating mounted on a plate fixture.

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.

IEC 62693:2013 specifies test procedures, conditions and methods according to which the main parameters and the main operational characteristics of industrial infrared electroheating installations are established. A limitation of the scope is that the infrared emitters have a maximum spectral emission at longer wavelengths than 780 nm in air or vacuum, and are emitting wideband continuous spectra such as by thermal radiation or high pressure arcs.

IEC 60519-10:2013 provides safety requirements for electrical resistance trace heating systems used in industrial and commercial applications for piping, vessels, roofs, concrete slab heating and other similar applications. This second edition cancels and replaces the first edition published in 2005. 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; - References to IEC 62395-1 and IEC 62395-2 have been completed.

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.

This International Standard 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.

IEC 61307:2011 specifies test methods for the determination of the available microwave output power and the efficiency of frequency conversion from the electrical input in industrial microwave heating installations. This standard also specifies test methods for assessing the microwave power deposition in the microwave workload - the microwave workload power, in microwave-only installations. This standard is applicable to industrial microwave heating equipment and installations in the frequency range from 300 MHz to 300 GHz. This third edition cancels and replaces the second edition published in 2006. It constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) it covers how to measure not only the microwave power output of all typical equipment designs, but also the system efficiency, including the standby and hibernation modes; b) the handling of the former A and B types of equipment is replaced by measurements of the available microwave power output and microwave workload power, respectively.

IEC 60519-6:2011 is applicable to equipment using microwave energy alone or in combination with other kinds of energy for industrial heating of materials. This part is applicable to industrial microwave heating equipment operating in the frequency range 300 MHz to 300 GHz. This third edition cancels and replaces the second edition published in 2002 and constitutes a technical revision. The significant changes with respect to the previous edition are as follows: - the third edition of IEC 60519-1:2003 has been taken into account (the structure of clauses was adapted to it as far as practicable); - some definitions are modified or brought into line with IEC 60050-841:2004; - clauses on abnormal operation, access openings, microwave enclosure and barriers are added; - the microwave leakage measurements are in a normative Annex A; - an informative Annex B on the rationales for microwave exposure and leakage limits is added; - Bibliography is added.

IEC 60703:2008 lays down the test methods to determine the essential parameters, technical data and characteristics of electroheating installations comprising one or more electron guns. The significant changes with respect to the previous edition are as follows: the latest edition of IEC 60519-7 has been taken into account; test requirements have been completed.

Deals with safety of electroheat installations with electron guns and applies to all electroheat applications with electron guns. May also be used for non-thermal applications with electron guns and equipment employing glow discharge systems. Applies also to high-voltage sources feeding electron guns. The main changes with respect to the previous edition cover: - new editions of IEC publications taken into account; - addition of new clauses; - requirements for the earthing system updated; - arrangement of return conductor changed.

Lays down requirements common to installations using the effect of electromagnetic forces on liquid metals; specific requirements for electromagnetic pouring equipment; specific requirements for electromagnetic equipment with lining. The significant changes with respect to the previous edition are the latest editions of IEC 60519-1:2003 and IEC 60519-3:2005 which have been taken into account. To be used in conjunction with IEC 60519-1.

Standardizes test methods to determine the essential parameters and technical characteristics of electroheat installations comprising furnaces. Applies to electrical installations comprising industrial induction channel furnaces and induction crucible furnaces for melting, holding and superheating.

Is applicable to industrial high-frequency dielectric heating installations used for the purpose of thermal applications such as melting, drying, welding, insect extermination, and gluing of partially conductive or non-conductive materials. Assists in compliance with the requirements set out in 6.4 of IEC 60519-9 when testing electroheating power sources.

Specifies the dimensions of turned and threaded cylindrical graphite arc furnace electrodes and graphite electrode pins for use as full graphite electrode columns on arc furnaces. Is essential for the interchangeability of electrodes from different sources.

Consists of requirements common to both induction and conduction heating installations and induction melting installations, and specific requirements for induction and conduction heating installations, and specific requirements for induction melting installations.

Applicable to industrial radio- or high-frequency induction heating installations used for the purpose of thermal applications (e.g. for surface hardening, welding, soldering, melting, forging, zone refining of semiconductors, etc.). Relates to high-frequency induction heating installations in the frequency range up to 300 MHz for power levels of 500 W and above, comprising high-frequency generators and inductors together with necessary mechanical devices for charge handling (e.g. hardening machines). The main purpose is to provide the test methods for the determination of output power of industrial high-frequency induction heating power sources.

IEC 60519-1:2015 specifies general safety requirements for industrial installations or equipment intended for electroheating (EH) and electroheating based treatment technologies as well as for electromagnetic processing of materials (EPM). This fifth edition cancels and replaces the fourth edition published in 2010. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) The title and scope of the standard has been expanded to include installations and equipment for electromagnetic processing of materials. b) Terms and definitions as well as the list of normative references have been updated and completed with new items. c) The requirements have been restructured. d) Additional requirements for electric and magnetic fields, for touch currents as well as for optical radiation have been added. e) New clauses addressing verification have been added. f) New annexes specifying limits of exposure hazards for electric and magnetic fields, optical radiation, noise and vibration have been added. g) New annexes on EMC, markings and warnings, guidelines for using this standard and information on the connection to ISO 13577-1 have been added.

IEC 60519-12:2013 specifies safety requirements for industrial electroheating equipment and installations in which infrared radiation, usually generated by infrared emitters, is significantly dominating over heat convection or heat conduction as means of energy transfer to the material to be treated. A further limitation of the scope is that the infrared emitters have a maximum spectral emission at longer wavelengths than 780 nm in air or vacuum, and are emitting wideband continuous spectra such as by thermal radiation or high pressure arcs.

IEC 60519-1:2010 specifies the general safety requirements applicable to industrial electroheating installations. This fourth edition cancels and replaces the third edition published in 2003. It constitutes a technical revision. The main technical changes with respect to the previous edition are as follows: - scope and object have been modified, voltage limits and classification removed; - terms/definitions, normative references and bibliography have been updated and completed; - Clause 4 on classification of equipment according to process frequency has been modified; - Clause 5 (General requirements) has been redrafted and new provisions have been added (e.g. relating to single fault conditions and EMF issues), following the recommendations of IEC Guide 104; - Clause 8 has been redrafted, the contents of subclauses 8.2 and 8.3 has been moved to a new normative Annex A and 8.4 has been deleted; - a new Clause 12 (Protection against other hazards) has been added; - clauses dealing with marking and documentation have been amended. The French version of this standard has not been voted upon.

Superseded by EN 62395-2:2013

Is applicable to electroheat installations such as furnaces for direct arc heating (direct arc furnaces, submerged arc furnaces, ladle arc heating furnaces) and furnaces for indirect arc heating. The contents of the corrigendum of December 2008 have been included in this copy.

Specifies requirements for electrical resistance trace heating systems and includes general test requirements. Also includes requirements for termination assemblies and control methods used with trace heating systems.

Specifies test methods for industrial microwave heating installations. Is applicable to industrial microwave heating equipment and installations used for the purpose of thermal application to loads containing water or moisture.

IEC 60519-21:2008 is applicable to indirect resistance heating equipment for the heating and melting of glass, operating in voltage bands 1 and 2. These particular requirements also apply to equipment for direct resistance heating and melting of glass by means of current introduced by electrodes passing through the charge to be heated. This new edition of IEC 60519-21 takes into account the latest editions of IEC 60519-1, of IEC 60519-2 and of IEC 60050-841.

Applicable to industrial electroslag remelting furnaces having one or more electrodes and having different melting power supplies, such as alternating current, direct current, or low-frequency current. Standardizes electroslag remelting furnace test conditions and methods to determine the main parameters and technical characteristics.

Is applicable to industrial high-frequency dielectric heating installations for the purpose of thermal applications such as melting, drying, welding, insect extermination and gluing of partially or non-conductive materials (plastics, wood, etc.) in both normal and protective atmospheres, using for example inert gases or vacuum. Relates to high-frequency dielectric heating installations with nominal frequency in the range from 1 MHz to 300 MHz with rated useful output power greater than 50 W. To be used in conjunction with EN 60519-1.

Applies to electroheat installations for remelting and, in some cases, for refining processes of metals through direct resistance heating of a conductive slag. To be used in conjunction with EN 60519-1. Test methods for electroslag remelting furnaces are specified in EN 60779.

Deals with safety requirements for electrical resistance trace heating systems in industrial and commercial applications. Pertains to trace heating systems that may comprise either factory fabricated or field (work-site) assembled units, and which may be series heater cables, parallel heater cables, heater pads or heater panels.

Lays down general safety requirements applicable to industrial electroheat installations, which may comprise electroheat equipment in the voltage range up to 3 600 V a.c. or 5 000 V d.c..

Standardizes safety requirements for both indirect and direct resistance heating equipment. Is applicable to the indirect resistance heating equipment and the direct resistance heating equipment operating in voltage bands 1 and 2.

Applies to equipment using microwave energy alone or in combination with other kinds of energy for industrial heating of materials.

Standardizes arc furnace test conditions and methods to determine the main parameters and technical operating characteristics. Applies to industrial three-phase direct arc furnaces, the rated capacity of which is equal to or greater than 0.5 tonne. Also applies to furnaces having one or more electrodes, other than three-phase furnaces.

EN following parallel vote

Describes the test conditions, fundamental measurements and general test methods applicable to all industrial electroheat installations to confirm their safety and performance specifications. It is intended to be used in conjunction with the relevant particular standards where there exist.

Cancels and replaces the previous edition which had the status of a report. Applies to direct and indirect resistance heating installations. Standardizes the safety requirements to be respected in the industrial furnaces energized with d.c. or a.c. single-phase or polyphase voltage of frequency up to 60 Hz.

Applies to electroheating installations comprising industrial coreless (crucible) induction furnaces for melting and for holding at temperature a molten charge. Standardizes test methods to determine the essential parameters and technical characteristics of electroheating installations comprising the furnaces indicated above.

Applies to turned and threaded cylindrical electrodes and to graphite nipples for arc furnaces.

Applies to systems such as: Stirring devices for continuous machines, adjoining or being part of arc furnaces, ladles, etc; transport of liquid metal for emptying or filling furnaces, launders or moulds; devices to transport liquid metal with simultaneous proportioning of the transported quantity, e.g. for filling diecasting machines; systems for influencing the ingot surface or the pouring stream enhancing crystallization by means of an electromagnetic field during continuous casting. Shall be read in conjunction with EN 60519-1