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BS EN IEC 60676:2024 – TC

BS EN IEC 60676:2024 – TC

$217.84

Tracked Changes. Industrial electroheating equipment. Test methods for direct arc furnaces

Published By Publication Date Number of Pages
BSI 2024 99
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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).

PDF Catalog

PDF Pages PDF Title
57 undefined
60 Annex ZA (normative)Normative references to international publicationswith their corresponding European publications
61 English
CONTENTS
63 FOREWORD
65 INTRODUCTION
66 1 Scope
2 Normative references
67 3 Terms, definitions and abbreviated terms
3.1 Terms and definitions
71 3.2 Abbreviated terms
72 4 Basic provisions for testing and test conditions
4.1 Aim of testing
4.2 Communication of test results
4.3 Boundaries of the energy using system for testing
4.3.1 General considerations
4.3.2 Batch type installations
73 4.3.3 Continuous type installations
4.4 General requirements for testing
4.5 Operating conditions during tests
4.6 Environmental conditions during tests
4.7 Supply voltage
74 5 Comparing equipment or installations
6 Measurements and charged material
6.1 General
6.2 Time resolution
6.3 Frequency measurement
6.4 Measurement of electrical data
6.4.1 Supply voltage and current
6.4.2 Voltage, current, electrical power and resistance
75 6.4.3 Measurement positions
6.5 Temperature measurement
6.5.101 Dipping probes for liquid steel or slag
6.6 Measurement of pressure, humidity or composition of fluids
6.7 Charged material
76 7 Numerical modelling
77 8 Technical tests
8.101 General
8.102 Electrical insulation
8.103 Cold function test
8.104 Hot commissioning
8.104.1 General
8.104.2 Energy consumption during holding operation
78 8.104.3 Energy consumption during normal operation
8.104.4 Rated arc furnace capacity
8.105 Preparation for performance test
79 8.105.1 Performance dependence on supply voltage
8.105.2 Processing range of intended operation
8.105.3 Short circuit test
8.105.4 Electrode consumption
8.105.5 Tap-to-tap time
8.105.6 Power on time
8.105.7 Arcing time
8.105.8 Process time
8.105.9 Apparent power
8.105.10 Active power
80 8.105.11 Reactive power
8.105.12 Power factor
9 Efficiency of the installation
9.1 General
9.2 Specific energy consumption
9.3 Heating efficiency of arc furnace installation
81 9.4 Supply power usage efficiency
9.5 Energy transfer efficiency
82 Annex A (informative)Energy efficiency assessment
83 Annex B (informative)Visual display of energy efficiency related information
Figures
Figure B.101 – Sankey diagram of a 130 MVA EAF DC (see Bibliography, Kühn)
85 Figure B.102 – Example of a time resolved power usage diagram of EAF scrap melting
87 Annex C (informative)Estimating energy use
C.1 General
C.2 Minimum energy consumption
88 C.3 Holding power
C.4 Transfer losses and transfer efficiency
C.5 Examples
89 Annex D (informative)Energy recoverability
90 Annex AA (informative)Short circuit test procedures (dip test)
AA.1 General
AA.1.1 EAF AC
AA.1.2 EAF DC
AA.2 High current system: resistance and reactance of EAF AC
AA.3 Impedances determined by short circuit test
91 AA.4 Test procedures for EAF AC
92 Figure AA.1 – Typical single line diagram for measuring electrical data of the high current system to determine the resistance and reactance values
95 AA.5 Reactance asymmetry factor
96 AA.6 Uncertainties of the operational short circuit measurements
97 Bibliography

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BS EN IEC 60676:2024 - TC
$217.84