1、 IEC 62395-2 Edition 1.0 2013-09 INTERNATIONAL STANDARD NORME INTERNATIONALE Electrical resistance trace heating systems for industrial and commercial applications Part 2: Application guide for system design, installation and maintenance Systmes de traage par rsistance lectrique pour applications in
2、dustrielles et commerciales Partie 2: Guide dapplication pour la conception, linstallation et la maintenance du systme IEC62395-2:2013 colourinsideTHIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2013 IEC, Geneva, Switzerland All rights reserved. Unless otherwise specified, no part of this publicat
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16、ommentaires sur cette publication ou si vous avez des questions contactez-nous: csciec.ch. IEC 62395-2 Edition 1.0 2013-09 INTERNATIONAL STANDARD NORME INTERNATIONALE Electrical resistance trace heating systems for industrial and commercial applications Part 2: Application guide for system design, i
17、nstallation and maintenance Systmes de traage par rsistance lectrique pour applications industrielles et commerciales Partie 2: Guide dapplication pour la conception, linstallation et la maintenance du systme INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE XC ICS
18、 25.180.10 PRICE CODE CODE PRIX ISBN 978-2-8322-1082-6 Registered trademark of the International Electrotechnical Commission Marque dpose de la Commission Electrotechnique Internationale Warning! Make sure that you obtained this publication from an authorized distributor. Attention! Veuillez vous as
19、surer que vous avez obtenu cette publication via un distributeur agr. colourinside 2 62395-2 IEC:2013 CONTENTS FOREWORD . 7 INTRODUCTION . 9 1 Scope . 10 2 Normative references . 11 3 Terms and definitions . 11 4 Surface heating of vessels and piping systems . 11 4.1 Application description 11 Gener
20、al . 11 4.1.1Environmental conditions . 11 4.1.2Trace heating systems considerations . 12 4.1.34.2 Design information General 12 General . 12 4.2.1Electrical system design 12 4.2.2Control and monitoring 12 4.2.3Trace heating system design . 13 4.2.4Design information documentation . 13 4.2.54.3 Ther
21、mal system design 14 General . 14 4.3.1Design conditions 14 4.3.2Thermal insulation . 15 4.3.3Heat loss determination . 19 4.3.4Design safety factor . 20 4.3.5Heat-up considerations 20 4.3.6Selection of trace heater 21 4.3.7Design calculations 23 4.3.8Theoretical sheath temperature calculations Meta
22、llic pipe 4.3.9applications . 24 Theoretical sheath temperature calculations Non-metallic pipe 4.3.10applications . 25 Design documentation . 26 4.3.11Start-up at low ambient temperatures 26 4.3.12Long trace heater circuits 27 4.3.13Chimney effect 27 4.3.144.4 Electrical design 27 4.5 Control and mo
23、nitoring system design . 27 General . 27 4.5.1Mechanical controllers . 28 4.5.2Electronic controllers . 28 4.5.3Application suitability . 28 4.5.4Location of controllers . 29 4.5.5Location of sensors . 29 4.5.6Alarm considerations . 30 4.5.7Integrated control 31 4.5.8Flow pattern analysis . 31 4.5.9
24、Dead-leg control technique 33 4.5.104.6 Special design considerations . 33 General . 33 4.6.162395-2 IEC:2013 3 Freeze protection systems . 33 4.6.2Sprinkler systems, fire suppression . 33 4.6.3Hot water services/tempered water 35 4.6.4Safety shower design requirements . 36 4.6.5Specialty lines . 36
25、 4.6.64.7 Installation. 38 General . 38 4.7.1Personnel aspects . 38 4.7.2Preparatory work . 38 4.7.3Preliminary installation of trace heating circuits . 39 4.7.4Insulation resistance test . 39 4.7.5Installation of trace heater systems . 39 4.7.6Installation of control and monitoring equipment 42 4.7
26、.7Necessary modifications 43 4.7.8Installation of the thermal insulation system. 43 4.7.9Installation of electrical power . 44 4.7.10Commissioning 45 4.7.114.8 Maintenance 46 General . 46 4.8.1Training of maintenance personnel 46 4.8.2Frequency of inspection . 46 4.8.3Maintenance program documentati
27、on 46 4.8.4Visual evaluation . 47 4.8.5Electrical evaluation 47 4.8.6Review of the electrical protection system . 47 4.8.74.9 Repair . 48 General . 48 4.9.1Fault location . 48 4.9.2Practicability of repair to electric trace heaters 48 4.9.3Repair techniques for electrical trace heaters 49 4.9.45 Roo
28、f and gutter de-icing . 49 5.1 Application description 49 5.2 Design information General 50 5.3 Thermal design . 51 5.4 Electrical design 51 5.5 Control and monitoring system design . 51 5.6 Special design considerations . 51 5.7 Installation. 51 General . 51 5.7.1Trace heaters and component mountin
29、g 52 5.7.25.8 Maintenance 55 5.9 Repair . 55 6 Rail heating 55 6.1 Application description 55 General . 55 6.1.1Switch point heating 56 6.1.2Contact/live rail heating . 56 6.1.3Track heating 56 6.1.4Catenary/pantograph shoe heating 56 6.1.5 4 62395-2 IEC:2013 6.2 Design information 57 General . 57 6
30、.2.1Weather data . 57 6.2.2Rail system description 57 6.2.3System design . 57 6.2.46.3 Thermal design . 57 Heating load determination 57 6.3.1Typical heating load 58 6.3.26.4 Electrical design 58 6.5 Control and monitoring system design . 58 6.6 Special design considerations . 58 Electrical consider
31、ations 58 6.6.1Finite element analysis 59 6.6.26.7 Installation. 59 General . 59 6.7.1Point heating . 60 6.7.2Swing nose crossing 60 6.7.3Clamp lock heating 61 6.7.4Contact/live rail heating and track heating . 61 6.7.5Catenary/pantograph shoe heating 62 6.7.66.8 Maintenance 62 6.9 Repair . 62 7 Sno
32、w melting 62 7.1 Application description 62 7.2 Design information 63 General . 63 7.2.1Weather data . 63 7.2.2Construction details of workpiece 63 7.2.3Electrical considerations 63 7.2.4System performance level . 63 7.2.5Trace heater layout and component mounting 64 7.2.67.3 Thermal design Power ou
33、tput (heat load) determination . 68 7.4 Electrical design 68 7.5 Control and monitoring system design . 68 7.6 Special design considerations . 68 7.7 Installation. 69 7.8 Maintenance 69 7.9 Repair . 70 8 Floor warming. 70 8.1 Application description 70 8.2 Design information 70 General . 70 8.2.1Env
34、ironmental data 70 8.2.2Construction details of workpiece 70 8.2.3Electrical considerations 70 8.2.4Trace heater layout and component mounting 71 8.2.58.3 Thermal design Heat load determination . 72 8.4 Electrical design 73 8.5 Control and monitoring system design . 73 62395-2 IEC:2013 5 8.6 Special
35、 design consideration . 73 8.7 Installation. 74 8.8 Maintenance 74 8.9 Repair . 74 9 Frost heave prevention . 74 9.1 Application description 74 9.2 Design information 75 General . 75 9.2.1Construction details of the floor . 75 9.2.2Electrical considerations 75 9.2.39.3 Heat load determination 75 Gen
36、eral . 75 9.3.1Trace heater layout and component mounting 77 9.3.29.4 Electrical design 77 9.5 Control and monitoring system design . 77 Control options 77 9.5.1Monitoring . 77 9.5.29.6 Special design considerations . 77 9.7 Installation. 78 9.8 Maintenance 78 9.9 Repair . 78 10 Underground thermal
37、energy storage systems 78 10.1 Application description 78 10.2 Design information 79 General . 79 10.2.1Environmental data 79 10.2.2Construction details of building 79 10.2.3Electrical considerations 79 10.2.4Trace heater layout and component mounting 79 10.2.510.3 Thermal design Heat-loss determina
38、tion . 80 10.4 Electrical design 80 10.5 Control and monitoring system design . 81 10.6 Special design considerations when trace heaters are located in sand layer 81 10.7 Installation. 81 General . 81 10.7.1Installation in sand 81 10.7.2Installation in concrete . 81 10.7.310.8 Maintenance 82 10.9 Re
39、pair . 82 Annex A (informative) Pre-installation checks 83 Annex B (informative) Trace heater commissioning record . 84 Annex C (informative) Maintenance schedule and log record . 85 Bibliography 86 Figure 1 Thermal insulation Weather-barrier installation 17 Figure 2 Typical temperature profile . 18
40、 Figure 3 Equilibrium conditions for workpiece maintenance 22 Figure 4 Equilibrium conditions for upper limit evaluation . 23 6 62395-2 IEC:2013 Figure 5 Heated tank example . 32 Figure 6 Bypass example . 32 Figure 7 Fire sprinkler sprig: tapered thermal insulation . 35 Figure 8 Double containment s
41、ystem . 37 Figure 9 Gravity flow piping systems 38 Figure 10 Ice dam formation 50 Figure 11 Downspout to underground drain 50 Figure 12 Roof and gutter trace heater arrangement 52 Figure 13 Gutter detail . 53 Figure 14 Typical roof mounting methods . 54 Figure 15 Drain detail for flat roof 55 Figure
42、 16 Typical positioning of point trace heater on stock rail and switch rail 60 Figure 17 Typical positioning of trace heater on swing nose crossing . 60 Figure 18 Typical clamp lock trace heater 61 Figure 19 Typical positioning of trace heater on steel and aluminium clad contact rails 61 Figure 20 T
43、ypical positioning of trace heater in pantograph shoe . 62 Figure 21 Snow melting trace heater embedded in concrete 65 Figure 22 Snow melting trace heater located in conduit . 66 Figure 23 Expansion joint detail . 67 Figure 24 Snow melting junction box location . 67 Figure 25 Typical floor warming t
44、race heater mounting 72 Figure 26 Typical floor heating power requirements . 73 Figure 27 Typical frost heave prevention substructure . 75 Figure 28 Frost heave prevention power requirements . 76 Figure 29 Typical underground thermal energy storage system installation 80 Table 1 Application types .
45、13 Table 2 Recommendations for monitoring and control Type II and III control . 29 Table 3 Recommendations for hot water services and tempered water temperatures . 35 Table 4 Typical snow melting heat loads 64 62395-2 IEC:2013 7 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ ELECTRICAL RESISTANCE TRACE
46、 HEATING SYSTEMS FOR INDUSTRIAL AND COMMERCIAL APPLICATIONS Part 2: Application guide for system design, installation and maintenance FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (I
47、EC National Committees). The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports
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49、governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations. 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an internationa
