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1、BRITISH STANDARD BS EN 62395-1:2006 Electrical resistance trace heating systems for industrial and commercial applications Part 1: General and testing requirements The European Standard EN 62395-1:2006 has the status of a British Standard ICS 25.180.10 ? BS EN 62395-1:2006 This British Standard was
2、published under the authority of the Standards Policy and Strategy Committee on 31 October 2006 BSI 2006 ISBN 0 580 49341 5 National foreword This British Standard was published by BSI. It is the UK implementation of EN 62395-1:2006. It is identical with IEC 62395-1:2006. The UK participation in its
3、 preparation was entrusted to Technical Committee PEL/27, Electroheating. A list of organizations represented on PEL/27 can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct applicat
4、ion. Compliance with a British Standard cannot confer immunity from legal obligations. Amendments issued since publication Amd. No. DateComments EUROPEAN STANDARD EN 62395-1 NORME EUROPENNE EUROPISCHE NORM September 2006 CENELEC European Committee for Electrotechnical Standardization Comit Europen d
5、e Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2006 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 62395-1:2006 E ICS 25.180.10 English
6、 version Electrical resistance trace heating systems for industrial and commercial applications Part 1: General and testing requirements (IEC 62395-1:2006) Systmes de traage par rsistance lectrique pour applications industrielles et commerciales Partie 1: Exigences gnrales et dessai (CEI 62395-1:200
7、6) Elektrische Begleitheizungen Trace-Widerstandsheizungen fr industrielle und gewerbliche Zwecke Teil 1: Allgemeine Anforderungen und Prfanforderungen (IEC 62395-1:2006) This European Standard was approved by CENELEC on 2006-09-01. CENELEC members are bound to comply with the CEN/CENELEC Internal R
8、egulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CENELEC member.
9、 This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions. CENELEC me
10、mbers are the national electrotechnical committees of Austria, Belgium, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spai
11、n, Sweden, Switzerland and the United Kingdom. EN 62395-1:2006 2 Foreword The text of document 27/533/FDIS, future edition 1 of IEC 62395-1, prepared by IEC TC 27, Industrial electroheating equipment, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 62395-1 on 2006-09
12、-01. The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2007-06-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2009-09-01 Annex
13、 ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 62395-1:2006 was approved by CENELEC as a European Standard without any modification. _ 3 EN 62395-1:2006 CONTENTS INTRODUCTION.4 1 Scope and object5 2 Normative references .6 3 Terms and definitions .6 4
14、General requirements .11 4.1 General.11 4.2 Metallic braids or sheaths 11 4.3 Electrical circuit protection requirements for branch circuits11 4.4 Control and temperature requirements .12 5 Testing.12 5.1 Type tests General .12 5.2 Type tests .12 5.3 Type tests Additional tests for outdoor exposed a
15、rea installations without thermal insulation 25 5.4 Type tests Additional tests for installations with embedded trace heater.27 5.5 Type tests Additional tests for installations with trace heater inside conduit or piping27 5.6 Routine tests .28 6 Marking28 6.1 General.28 6.2 Product markings.28 6.3
16、Markings for field-assembled components29 7 Installation instructions .29 Annex ZA (normative) Normative references to international publications with their corresponding European publications31 Bibliography .30 Figure 1 Flammability test 15 Figure 2 Impact test .16 Figure 3 Cold bend test18 Figure
17、4 Moisture resistance test19 Figure 5 Verification of rated output21 Figure 6 Verification of sheath temperature using system approach 23 Figure 7 Maximum sheath temperature using the product classification approach24 Figure 8 Abrasion test27 Table 1 Test voltages for the dielectric test.13 EN 62395
18、-1:2006 4 INTRODUCTION IEC 62395-1 provides the essential requirements and testing appropriate to electrical resistance trace heating equipment used in industrial and commercial applications. While some of this work already exists in national or international standards, this standard has collated mu
19、ch of this existing work and added considerably to it. IEC/TS 62395-2 provides detailed recommendations for the system design, installation and maintenance of electric trace heating systems in industrial and commercial applications. It is the objective of IEC 62395 that, when in normal use, electric
20、al trace heating systems should operate safely under their defined conditions of use, by a) employing heaters of the appropriate construction and meeting the test criteria detailed in Part 1. The construction should include a metallic sheath, braid, screen or equivalent electrically conductive cover
21、ing; b) operating at safe temperatures when designed, installed, and maintained in accordance with Part 2; c) having at least the minimum levels of overcurrent and ground fault protection recommended in Part 2. Some tests of Part 1 differ from similar tests developed by TC 20 and are to be reviewed
22、in the future. These and other tests are almost identical to the tests given in IEC 62086-1:20011 and are duplicated in Part 1 for completeness (see notes in the text). 1 Permission to reproduce the text of several tests from IEC 62086-1:2001 that are not specific to explosive gas atmospheres has be
23、en granted by TC 31. 5 EN 62395-1:2006 ELECTRICAL RESISTANCE TRACE HEATING SYSTEMS FOR INDUSTRIAL AND COMMERCIAL APPLICATIONS Part 1: General and testing requirements 1 Scope and object This part of IEC 62395 specifies requirements for electrical resistance trace heating systems and includes general
24、 test requirements. This standard pertains to trace heating systems that may comprise either factory-fabricated or field-assembled (work-site) 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 w
25、ith the manufacturers instructions for connection to voltage supplies up to and including 450-750 V. This standard also includes requirements for termination assemblies and control methods used with trace heating systems. This standard does not include or provide for any applications in potentially
26、explosive atmospheres. This standard does not cover induction, impedance or skin effect heating. Trace heating systems can be grouped into different types of applications and the different conditions found during and after installation necessitate different requirements for testing. Trace heating sy
27、stems are usually certified for a specific type of installation or application. Typical applications for the different types of installation include, but are not limited to: a) installations of trace heating for surface heating on pipes, vessels and associated equipment applications include: freeze
28、protection and temperature maintenance; hot water lines; oil and chemical lines; sprinkler system mains and supply piping; b) outdoor exposed area installations of trace heating applications include: roof de-icing; gutter and down-spout de-icing; catch basins and drains; rail heating2; c) installati
29、on with embedded trace heating applications include: snow melting; frost heave protection; floor warming; 2 Further evaluation may be required to address application specific conditions such as fluctuations in impressed voltage and voltage spikes. EN 62395-1:2006 6 energy storage systems; door frame
30、s; d) installations with trace heating inside conduit or piping applications include: snow melting in conduit; frost heave protection in conduit; floor warming in conduit; energy storage systems in conduit; internal trace heating for freeze protection of potable water lines; enclosed drains and culv
31、erts. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60050-841:2004,
32、International Electrotechnical Vocabulary (IEV) Part 841: Industrial electroheat IEC 60068-2-9, Environmental testing Part 2: Tests Guidance for solar radiation testing IEC 60519-1:2003, Safety in electroheat installations Part 1: General requirements IEC 60519-10:2005, Safety in electroheat install
33、ations Part 10: Particular requirements for electrical resistance trace heating systems for industrial and commercial applications 3 Terms and definitions For the purposes of this document, the terms and definitions given in IEC 60050-841 and in IEC 60519-10, some of which are repeated here, as well
34、 as the following, apply. 3.1 ambient temperature average temperature of air or another medium in the vicinity of the equipment NOTE Where electrical trace heaters are enclosed in thermal insulation, the ambient temperature is the temperature exterior to such thermal insulation. IEV 826-10-03, modif
35、ied 3.2 branch circuit that portion of the wiring installation between the overcurrent device protecting the circuit and the trace heater(s) 3.3 connections (terminations) 3.3.1 cold lead (for trace heater) electrically insulated conductor or conductors used to connect a trace heater to the branch c
36、ircuit and designed so that it does not produce significant heat 7 EN 62395-1:2006 3.3.2 end termination termination, which may be heat producing, applied to a trace heater at the end opposite that where the power is supplied 3.3.3 integral components factory-fabricated or field-assembled electrical
37、 terminations and connections, such as heat shrink terminations, moulded end seals or splices, which conform to the general shape of the trace heater and are exposed to the same environments as the trace heater 3.3.4 power termination termination applied to the end of a trace heater at which the pow
38、er is supplied 3.3.5 tee electrical connection of trace heaters, in series or in parallel, to accommodate a branch in the circuit and resembling the shape of a capital T 3.4 dead leg segment of process piping segregated from the normal flow pattern for the purpose of providing a heat-loss reference
39、3.5 design loading minimum power that will meet the design requirements, in the worst conditions, after voltage and resistance tolerances and appropriate safety factors have been considered 3.6 factory-fabricated unit or set trace heater unit or set, including the necessary terminations and connecti
40、ons, assembled by the manufacturer 3.7 field-assembled unit or set trace heaters supplied in bulk with terminating components to be assembled at the work site 3.8 heat loss energy flow from a pipe, vessel or equipment to its surroundings 3.9 heat sink part that conducts and dissipates heat away from
41、 a workpiece NOTE Typical heat sinks are pipe shoes, pipe supports and items of large mass such as valve actuators or pump bodies. 3.10 heat transfer aids thermally conductive materials, such as metallic foils or heat transfer compounds used to increase the heat-transfer efficiency from trace heater
42、s to the workpiece EN 62395-1:2006 8 3.11 heater pad trace heater comprising series or parallel connected elements having sufficient flexibility to conform to the shape of the surface to be heated 3.12 heater panel non-flexible trace heater comprising series or parallel connected elements fabricated
43、 to conform to the general shape of the surface to be heated 3.13 high limit temperature maximum allowable temperature of the system, including piping, fluid and trace heating system 3.14 maximum ambient temperature highest ambient temperature at which the trace heater is operable and should perform
44、 according to specified requirements 3.15 maximum withstand temperature maximum operating or exposure temperature that does not adversely affect the thermal stability of the trace heater and its component parts 3.16 metallic covering metallic sheath, braid, screen or equivalent electrically conducti
45、ve covering used to provide an electrical path to operate an electrical protection device and may also provide additional physical protection for a trace heater 3.17 minimum ambient temperature lowest ambient temperature specified at which the trace heater is operable and performs according to speci
46、fied requirements NOTE Heat-loss calculations in IEC/TS 62395-2 are based on the minimum ambient temperature. 3.18 operating voltage actual voltage applied to the trace heater when in service 3.19 overjacket continuous layer of material applied outside the metallic sheath, screen or armouring to pro
47、tect against corrosion 3.20 parallel trace heater(s) heating elements electrically connected in parallel, with the heating element either continuous or in discrete units or zones, such that the watt density per unit length is not significantly changed with any change in circuit length 3.21 power den
48、sity (linear or surface) power output in watts per linear metre for trace heater cables and cable units, and in watts per square metre for trace heater pads and panels and trace heater pad and panel units 9 EN 62395-1:2006 3.22 rated output total power or power per unit length or unit surface area o
49、f the trace heater, at rated voltage, temperature, length or area which is normally expressed in watts, watts per metre or watts per square metre 3.23 rated voltage voltage to which operating and performance characteristics of trace heaters are referred 3.24 routine test test to which each individual devi