Bsi bs en 60079 30 1 2017

This edition in lu es the fol owin sig ificant c an es, a art f rom the general revision an updatin of the first edition of IEC 6 0 9-3 -1 an harmonization with IEEE Std 515, with resp c

Ex plosi ve atmospheres

Part 30-1: Electrical r esistanc trac heating — General and testing r equirements

National foreword

This British Stan ard is the UK implementation of EN 6 0 9-3 -1:2 1

It is de ived from IEC IEE 6 0 9-3 -1:2 1 It supe sedes

BSEN 6 0 9-3 -1:2 0 , w hich iswith rawn

The CENELECcommon modif icationsha e be n implement ed at the

a pro riat e plac s in the t ext The s art an finish of each common

modif ication is in icat ed in the t ext b  

The UK p rticip tion in it pr p ration was entrust ed t o Te hnical

Committ ee EXL 3 , Eq ipment for ex losive atmosphe es

A l s of org nizations r pr sent ed on this committ ee can be o tained on

r q es t o it se r tary

This publ cation does not purp rt t o inclu e al the ne es ary pro isions

of a contract Use s ar r sponsible for it cor e t a plcation

© The British Stan ards Ins itution 2 1

Publshed b BSI Stan ards Limit ed 2 1

ISBN 9 8 05 0 7 8 0 7

ICS 2 2 0.2

Compl ance with a British Standard cannot co fer immunity from

le al o lg tio s

This British Stan ard was publ shed u de the a uthority of the

Stan ards Polcy an Strat eg C mmitt ee on 3 July 2 1

Amendments /cor ig en a is ued since publ catio

Explosive at mospheres - Part 30-1: Elec t ric al resist anc e t rac e

heat ing - General and t est ing requirement s

(IEC/IEEE 60079-30-1:2015 , modified)

Atmo p ère e plo iv es - Partie 3 - : Tra a e p r

ré ist an e élec t riq e - Exig n e g n rale et d'e s i

(IEC/IE E 6 0 9-3 - :2 15 ,mo ifié )

Ex lo io s efä rd ter Bereic e - Tei 3 - : Ele t ris h

Wid rsta d - Be leit heiz n e - Allg mein A nford ru g n

u d Prüfa ford ru g n

(IEC/IE E 6 0 9-3 - :2 15 , mo ifiziert )

This Euro e n St an ard wa a prov ed b CENELEC o 2 17-0 -0 CENELEC memb rs are b u d to c mply wit h th CEN/ CENELEC

Int ern l R eg latio s whic st ip late th c n it io s for giv in t his Euro e n St an ard th st atu of a n tio al sta d rd wit ho t a y alteratio

Up-t o-d te lsts a d biblo ra hic l refere c s c n ernin s c n tio al st an ard ma b o tain d o a plc t io t o th CEN-CENELEC

Ma a eme t Ce t re or t o a y CENELEC memb r

This Euro e n St an ard e ist s in thre oficial v ersio s (En ls , Fre c , Germa ) A v ersio in a y ther la g a e ma e b t ra slatio

u d r t he re p n ibi ty f a CENELEC memb r int o its own la g a e a d n tifie t o th CEN-CENELEC Ma a eme t Ce t re h s th

s me st atu a t he oficial v ersio s

CENELEC memb rs are th n tio al elec t rot ec nic l c mmit te s of Aust ria, Belgium, Bulg ria,Cro tia, Cy pru ,t he Cz c R ep blc,

De mark , Est onia, Finla d, Former Yu o la R ep blc f Ma e o ia, Fra c , Germa y , Gre c ,Hu g ry , Ic la d, Irela d, It aly, L t v ia,

Lith a ia, L x mb urg,Malta,th Net herla d , Norway , Pola d,Portu al R oma ia,Serbia, Slov akia, Slov enia,Sp in, Swe e ,

Swit z erla d, Turk ey n th Unite K in d m

Europea n Commit tee for Ele t rotechnica l Sta nd a rd iza tio

Comit é Europé n d e Norma lisa t io Ele t rotech nique

Europä isches Komitee für Elektrot ech nische Nor mu ng

CEN- CENE EC Management Cent re: Av en e Marnix 17, B- 10 0 Brus els

© 2 17 CENELEC All rig t s of e ploitat io in a y form a d b a y me n re erv ed worldwid for CENELEC Memb rs

R ef.No.EN 6 0 9-3 - :2 17 E

European foreword

This doc ument (EN 6 0 9-3 -1:2 17) c on ist s of t he t ext of IEC/IEEE 6 0 9-30-1:2 15

pre ared by IEC/TC 31 "Eq ipment for explosiv e at mospheres" in c olab rat ion wit h IEEE

St an ard As oc iat ion (IEEE-SA), toget her with t he c ommon modific ation pre ared by

CLC/ TC 31 "Elect ric al a p rat us for p t ent ialy ex plosive atmospheres"

The folowin dat es are fixed:

• lat est dat e by whic h t his doc ument has t o b

implement ed

at nat ional lev el by publcation of an ident ic al

nat ional st an ard or by en orsement

(do ) 2 18-0 -0

• lat est dat e by whic h t he nat ional st an ard c onflc t in

w it h t his doc ument have t o b with rawn

(dow) 2 2 -0 -0

This do c ument s p rsedes EN 6 07 -3 -1:2 07

The St at e o f the Art is inc lu ed in An ex ZY “Significant chan es b t we n this Euro e n

St an ard and EN 6 0 9-3 -1:2 0 ”

For t he significant c han es wit h resp ct t o EN 6 0 9-3 -1:2 0 , se An ex ZY

An exes whic h are ad itional t o t hose in IEC/IEEE 6 0 9-3 -1:2 15 are prefixed “Z”

This document has b en pre ared u der a man at e given t o CENELEC by t he Euro e n

Commis ion and t he Euro e n Fre Trade As ociat ion, an s p ort s es ential requirement s

o f EU Direc tive

For t he relat ion hip with EU Direc t ive se informat ive Annex Z Z, whic h is an int egral p rt

o f t his doc umen

Annex ZA

(normat iv )

Normat ive references t o int ernat ional publ cat ions

wit h t heir cor esponding European publ cat ions

The folowin referenc ed documents are in isp n a le for t he a plc at ion o f t his doc men

For dated referenc es, only the edit ion c it ed a ples F r u dat ed referenc es, t he latest edit ion

o f t he referenc ed document inc lu in an amen ment s) a ples

NOT E Wh n a int ern tio al p blc atio h s b e mo ifie b c mmo mo ific t io s, in icated b (mo ), the

rele a t EN/ HD a ples

IEC 6 0 0-151 2 01 Intern tio al Elect rotechnic al Voc b lary -

Part 151: Ele tric al a d ma n t ic d vic es

IEC 6 0 0-4 6 2 0 Intern tio al Elec t rotechnic l Voc b lar y -

Part 4 6: Eq ipme t or e plosive atmosp eres

IEC 6 6 5-1 -3 - Fire h z ard tes n - Part 1 -3: T est lames – 5 0 W

flames - App ratus a d confirmatio al test metho s

EN 6 6 5-1 -3 -

ISO 4 8 - Plas c s - Determin tio of c ha g s in c lo r a d

v ariatio s in pro erties after e p sure to d ylg t u d r

glas , n tural weat herin or la oratory lg t so rc es

ISO 4 9 -1 - Plas c s - Met ho s of e p sure to la oratory lg t

so rc s - Part 1: Ge eral g id nc e

EN 4 9 -1 -

ISO 4 9 -2 - Plas c s - Met ho s of e p sure to la oratory lg t

so rc s - Part 2: Xe o -arc lamps

EN 4 9 -2 -

AST M D5 2 - Stan ard sp cific tio for la oratory b rn r use for

smal-sc ale b rnin tests o plas c mat erials

AST M G15 - Stan ard prac tic for o eratin x n n arc lg t

a p rat us for e p sure of n nmetal c materials

Annex ZY

(informat iv e)

Signific nt c a ges bet we n this Europea St andard and EN 60 79- 30- 1:2 0

The sig ific ant c han es w ith resp ct t o EN 6 0 9-30-1:2 07 are as lst ed b low

Addit io of t able sp cify in t he a plc t io or e clusio of

sp cific cla ses of IEC 6 0 9-0 Editio 6

For stabi ze d sig s, a clarific t io for t he n e for

verific t io b t es n a d t he a ditio of a t able for t he

sp cific re uireme t s

4.5.2 X

For c nt role d sig s, a c larific t io for t he n e for

verific t io b t es n a d t he a ditio of a t able for t he

sp cific re uireme t s

4.5.3 X

For c nt role d sig s, clarificat io s a d a ditio s o t he

se arat e re uireme ts for Gb/Db a d Gc /Dc

T he re uireme t s for c albratio of t he flamma i t y t est

fixt ure are re lac ed wit h e uiv le t re uireme ts for t he

e erg levels of t he t est g ses

T he re la eme t of t he t hermalsafet y pro e ure wit ha

t hermal p rforma c proc ed re

5.1.12

C2

T he a ditio of a se o d proc ed re ut ilzin a plat e fixt ure

for t he sy st ems met ho for ma imum sh at h temp rature

R eq ireme t c ha g d for t he markin of t he minimum

instalat io t emp rat ure

Addit io of Ann x sp cify in t ra e h at in d sig

verific t io met ho olo y , mo e from IEC 6 0 9-3 -2

Ann x C

C6

NOT Th te h ic l c a g s ref ere to in lu e th sig ific n e of te h ic l c a g s in th r evise

IEC Sta d rd, b t th y d n t form a e h ustiv lst of al mo ific tio s from th pre io s v rsio

Ex lanation of the Types of Signific nt Changes:

A) Def initions

1 Minor and editor ial c anges:

• Clarifi ation

• Decr ease of tec nical r equirements

• Minor tec nical c an e

• Editorial cor rections

These ar e c an es w hic modif y requir ements in an editorial or a minor tec nical

w ay They in lude c an es of the w or ding to clarify tec nical requirements w ithout

an tec nical c ange, or a redu tion in level of existing requir ement

2 Exte sion:

• Addition of tec nical o tion

These ar e c an es whic add new or modify existing tec nical requir ements, in a

w ay that new options are given, but without in r easing r equir ements for equipment

that was fuly complant with the pr eviou standard Theref or e, these w il not have

to be considered for pr od cts in confor mity w ith the preceding edition

3 Major tec nic l cha ges:

• ad ition of tec nical r eq ir ements

• incr ease of tec nical r equir ements

These ar e c anges to tec nical requir ements (addition, incr ease of the level or

removal) made in a w ay that a pr odu t in confor mity w ith the pr eceding edition w il

not alway b able to fulfil the r equir ements given in the later edition These

c anges have to b considered for produ ts in conf or mity with the pr ecedin

edition For these c anges additional infor mation is provided in item B) below

NOT Th se c a g s re rese t c re t te h olo ic l k owle g Howe er, th se c a g s sh uld

n t n rmaly h v a inf lu n e o e uipme t alre d pla e o th mark t

B) Inf or mation about the bac ground of ‘Major te hnical cha ges’

C1 – The r equir ements for additional mec anical testing have be n in luded f or

har monization an for ad ed safety

C2 – The r eq ir ements for ther mal perf or mance have b en in lu ed to r ecognize the

neces ity for thermal stabi ty of pr od cts in explosive atmospher es

C3 – A secon pr oced r e uti zin a plate fi tur e has b en in lu ed f or s e th

temper atur e deter mination, w hic may be used in leu of the s e th temp r atur e

ver if i ation par t of 5.1.13.4.2

C4 – An outdoor expos r e test has be n added to cover pr odu ts that may be exposed

to s nlght an moistur e in the inten ed a plcation

C5 – Additional mar kin and doc mentation r equir ements have b en added to pr ovide

additional inf or mation to the end user

C6 – The tr ace he tin design ver if i ation methodology has b en ad ed to algn with

the evaluation r equir ements for the sta i zed desig and the contr oled design

method of maximum s eath temp r atur e deter mination

Annex ZZ

(informat iv )

R elat ionship between t his European st andard and t he essent ial requirement s

of Direct ive 2014/34/EU aimed t o be covered

This Europ an stan ard has be n pre ared u der a Commis ion’s st an ardiz at ion request

t o prov ide one v olu t ary me n of c onformin t o es ent ial of Direct iv e 2 14/3 / EU of t he

Euro e n Parlament an of the Cou c il of 2 Fe ruary 2 14 on the a proximat ion of t he

laws of the Member St at es c onc ernin eq ipment an prot ectiv e syst ems inten ed for u e in

p t ent ialy explosive at mospheres

Onc e this st an ard is c ited in the Ofic ial Journal of the Euro e n Union u der t hat Direc t ive,

c omplanc e w ith t he normat iv e c lau es of t his st an ard given in Ta le ZZ.1 c onfers, wit hin

t he lmits of t he sc op of t his st an ard, a pres mpt ion of c onformit y with t he c orresp n in

es ent ial req irement s of t hat Direc tiv e, an as oc iat ed EFTA regulat ion

Table ZZ.1 – Cor espondence between t his European st andard and Annex I of

Direct ive 2014/34/EU

Es ent ial R eq irement s of

1.2.6 Not c ov ered Not a plc able

1.2.7 4, 5, 7, An ex C Cov ered exc ept of

av oidanc e of injury by

t ouc hin hot s rfac es of t he

t rac e he t ers or work piec e

for t his, refer to

EN 6 07 -30-2

Es ent ial R eq irement s of

1.3.1 All Cov ered by t he prin iple of

the t ype of prot ec t ion

Es ent ial R eq irement s of

WAR NING 1: Pres mpt ion of c onformit y st ays v ald only as lon as a referenc e to t his

Europ an st an ard is maintained in t he lst publs ed in t he Ofic ial Journal of t he Euro e n

Union Users of t his st an ard s ould c ons lt frequently t he lat est lst publs ed in t he Ofic ial

Journal of the Euro e n Union

WAR NING 2: Ot her Union legislat ion may b ap lc able t o t he prod c t fal ng within t he

sc op of t his st an ard

© IEC/IEEE 2 15

CONTENTS

FOREWORD 5

INTRODUCTION 10 1 Sco e 1

2 Normative referen es 1

5 3 Terms an definition 16 4 General req irements 2

4.1 General 2

4.2 Mec anical stren th 2

4.3 Termination an con ection 2

4.4 Circ it protection req irements for bran h circ its 2

4.5 Temp rature req irements 2

4.5.1 General 2

4.5.2 Sta i zed desig 2

4.5.3 Control ed desig 2

5 Testin 2

5.1 Typ tests 2

5.1.1 General 2

5.1.2 Dielectric test 2

5.1.3 Electrical in ulation resistan e test 2

5.1 4 Flamma i ty test 2

5.1.5 Imp ct tests 2

5.1.6 Deformation test 3

5.1.7 Cold b n test 3

5.1.8 Water resistan e test 3

5.1.9 Integral comp nents resistan e to water test 3

5.1.10 Verification of ated output 3

5.1.1 Thermal sta i ty of electrical in ulatin material 3

5.1.12 Thermal p r orman e test 3

5.1.13 Determination of maximum s e th temp rature 3

5.1.14 Verification of start-up c r ent 4

5.1.15 Verification of the electrical resistan e of electrical y con u tive coverin 4

5.1.16 Outdo r exp s re test 4

5.2 Routine tests 4

5.2.1 Dielectric test 4

5.2.2 Verification of ated output 4

6 Markin 4

6.1 Prod ct markin s f or trace he ters 4

6.2 Markin s f or field as embled comp nents 4

7 Doc mentation req irements 4

7.1 General 4

7.2 Circ it desig doc mentation 4

7.3 Trace he tin s stem doc mentation 4

7.3.1 General 4

An ex C (normative) Trace he ter prod ct desig verif i ation methodolog 5

C.1 General 5

C.2 Desig methodolog an selection of trace he ters 5

C.3 Sta i zed desig calc lation 5

C.4 Trace he ter p r orman e an eq i brium con ition 5

C.5 He t los calc lation 5

C.6 He t los desig saf ety factor 5

C.7 Maximum temp rature determination 5

C.7.1 The retical pip an s e th temp rature calc lation – Metal c a pl cation 5

C.7.2 The retical ves el an s e th temp rature calc lation – Metal c a pl cation 5

C.7.3 She th temp rature – metal c a plcation uti zin a temp rature lmiter control sen in the trace he ter s e th or an artificial hot sp t 6

C.7.4 The retical s e th temp rature calc lation – Non-metal c a pl cation 6

C.7.5 She th temp rature – non-metal c a pl cation uti zin a temp rature lmiter control sen in the trace he ter s e th or an artificial hot sp t 6

An ex D (normative) Req irements f or Division 1 an Division 2 trace he tin s stems 6

D.1 Ap l cation 6

D.2 General 6

D.3 Termination an con ection 6

D.4 Control an temp rature req irements 6

D.4.1 General 6

D.4.2 Sta i zed desig 6

D.4.3 Control ed desig 6

D.4.4 Req irements for protective device in Division 1 an 2 6

D.5 Typ tests 6

D.5.1 Division 1 trace he tin eq ipment 6

D.5.2 Division 2 eq ipment 6

D.6 Markin 6

D.7 In tru tion – In talation req irements 6

An ex E (normative) Typ test matrix for Division 1 an 2 explosive atmospheres 6

Biblogra h 6

Fig re 1 – Flamma i ty test 2

Fig re 2 – Example of ro m temp rature imp ct test 3

Fig re 3 – Example of minimum temp rature imp ct test 31

Fig re 4 – Cold b n test 3

IEC/IEEE 6 0 9-3 -1:2015 – 3 – © IEC/IEEE 2 15 7.3.2 F r trace he tin s stems ac ordin to the prod ct clas ification method 4

7.3.3 F r trace he tin s stems ac ordin to sta i zed desig method 4

7.3.4 F r trace he tin s stems ac ordin to control ed desig method 4

7.4 In tru tion f or in tal ation of trace he tin s stem 5

7.5 In tru tion f or commis ionin 5

7.6 In tru tion f or maintenan e / re air or modif i ation 5

An ex A (informative) Typ test matrix for EPLs Gb/Gc/Db/Dc (Refer to IEC 6 0 9-14 f or the relation hip of EPLs to Zones) 5

An ex B (informative) Chec l st for in tal ation 5

An ex C (normative) Trace he ter prod ct desig verif i ation methodolog 5

C.1 General 5

C.2 Desig methodolog an selection of trace he ters 5

C.3 Sta i zed desig calc lation 5

C.4 Trace he ter p r orman e an eq i brium con ition 5

C.5 He t los calc lation 5

C.6 He t los desig saf ety factor 5

C.7 Maximum temp rature determination 5

C.7.1 The retical pip an s e th temp rature calc lation – Metal c a pl cation 5

C.7.2 The retical ves el an s e th temp rature calc lation – Metal c a pl cation 5

C.7.3 She th temp rature – metal c a plcation uti zin a temp rature lmiter control sen in the trace he ter s e th or an artificial hot sp t 6

C.7.4 The retical s e th temp rature calc lation – Non-metal c a pl cation 6

C.7.5 She th temp rature – non-metal c a pl cation uti zin a temp rature lmiter control sen in the trace he ter s e th or an artificial hot sp t 6

Fig re 5 – Integral comp nents resistan e to water test 3

Fig re 6 – Verification of rated output 3

Fig re 7 – Maximum s e th temp rature u in prod ct clas ification a pro c 3

Fig re 8 – Verification of s e th temp ratures u in pip s ulpture 41

Fig re 9 – Verification of s e th temp rature, plate test 4

Fig re 10 – Verification of s e th temp rature – plate test with serp ntined sample 4

Fig re 1 – Plate test with two samples cros ed over 4

Fig re 12 – Plate test with a sin le sample cros ed over 4

Fig re C.1 – Eq i brium con ition for workpiece maintenan e 5

Fig re C.2 – Eq i brium con ition for up er l mit evaluation 5

6

Fig re C.2 – Eq i brium con ition for up er l mit evaluation 5

Ta le 1 – Ap l cation or ex lu ion of sp cific clau es of IEC 6 0 9-0 1

Ta le 2 – She th temp rature desig con ition b sed on eq ipment protection levels – Sta i zed desig a pro c 2

Ta le 3 – She th temp rature desig con ition b sed on eq ipment protection levels EPLs – Control ed desig a pro c 2

Ta le 4 – Test voltages for the dielectric test 2

Ta le A.1 – Determination of test samples 5

Ta le B.1 – Trace he ter in tal ation record – Example 5

– 4 – IEC/IEEE 6 0 9-3 -1:2 15 © IEC/IEEE 2 15 Fig re 5 – Integral comp nents resistan e to water test 3

Fig re 6 – Verification of rated output 3

Fig re 7 – Maximum s e th temp rature u in prod ct clas ification a pro c 3

Fig re 8 – Verification of s e th temp ratures u in pip s ulpture 41

Fig re 9 – Verification of s e th temp rature, plate test 4

Fig re 10 – Verification of s e th temp rature – plate test with serp ntined sample 4

Fig re 1 – Plate test with two samples cros ed over 4

Fig re 12 – Plate test with a sin le sample cros ed over 4

Fig re C.1 – Eq i brium con ition for workpiece maintenan e 5

Fig re C.2 – Eq i brium con ition for up er l mit evaluation 5

Ta le 1 – Ap l cation or ex lu ion of sp cific clau es of IEC 6 0 9-0 1

Ta le 2 – She th temp rature desig con ition b sed on eq ipment protection levels – Sta i zed desig a pro c 2

Ta le 3 – She th temp rature desig con ition b sed on eq ipment protection levels EPLs – Control ed desig a pro c 2

Ta le 4 – Test voltages for the dielectric test 2

Ta le A.1 – Determination of test samples 5

Ta le B.1 – Trace he ter in tal ation record – Example 5

Ta le D.1 – Division trace he tin s stems 6

Ta le D.2 – She th temp rature desig con ition – Sta i zed desig a pro c 6

Ta le D.3 – She th temp rature desig con ition – With temp rature control device 6

Ta le E.1 – Ap lca le trace he ter an trace he ter p d an p nels tests by in tal ation location 6

Ta le E.2 – Ap lca le tests for integral comp nents with trace he ters an trace he ter p d an p nels 6

Part 30-1: Electrical resistance trace heating –

General and testing requirements

FOREWORD

1 Th Intern tio al Ele trote h ic l Commis io (IEC) is a worldwid org niz tio f or sta d rdiz tio c mprisin

al n tio al ele trote h ic l c mmite s (IEC Natio al Commite s) Th o je t of IEC is to promote

intern tio al c -o eratio o al q e tio s c n ernin sta d rdiz tio in th ele tric l a d ele tro ic field To

this e d a d in a ditio to oth r a tivitie , IEC p bls e Intern tio al Sta d rd , Te h ic l Sp cific tio s,

Te h ic l Re orts, Pu lcly Av ia le Sp cif i atio s (P S) a d Guid s (h re fter ref er e to a “IEC

Pu lc tio (s)”) Th ir pre aratio is e tru te to te h ic l c mmite s; a y IEC Natio al Commite intere te

in th s bje t d alt with ma p rticip te in this pre aratory work Intern tio al g v rnme tal a d n n

-g v rnme tal org niz tio s laisin with th IEC als p rticip te in this pre aratio

IE E Sta d rd d c me ts are d v lo e within IE E So ietie a dSta d rd Co rdin tin Commite s of th

IE E Sta d rd As o iatio (IE E-SA) Sta d rd Bo rd IE E d v lo s its sta d rd thro g a c n e s s

d v lo me t pro e s, a pro e b th Americ n Natio al Sta d rd In titute, whic brin s to eth r v lu te rs

re re e tin v rie viewp ints a d intere ts to a hie e th f i al pro u t Volu te rs are n t n c s ariy

memb rs of IE E a d s rv with ut c mp n atio Whie IE E a ministers th pro e s a d e ta ls e rule

to promote f airn s in th c n e s s d v lo me t pro e s, IE E d e n t in e e d ntly e alu te, te t, or

v rify th a c ra y of a y of th inf ormatio c ntain d in its sta d rd Us of IE E Sta d rd d c me ts is

wh ly v lu tary IEE E d ocume t s are made avail ble for us subj ect t o importa t not ice a d l egal discl aimers

(s e htp:/sta d rd e e.org/IPR/dis laimers.html

for more information)

IEC c la orate clo ely with IE E in a c rd n e with c n itio s d termin d b a re me t b twe n th two

org niz tio s This Du l L g Intern tio al Sta d rd wa jointly d v lo e b th IEC a d IE E u d r th

terms of th t a re me t

2) Th f ormal d cisio s of IEC o te h ic l maters e pre s, a n arly a p s ible, a intern tio al c n e s s of

o inio o th rele a t s bje ts sin e e c te h ic l c mmite h s re re e tatio fom al intere te IEC

Natio al Commite s Th f ormal d cisio s of IE E o te h ic l maters, o c c n e s s within IE E So ietie

a d Sta d rd Co rdin tin Commite s h s b e re c e , is d termin d b a b la c d b lot of materialy

intere te p rtie wh in ic te intere t in re iewin th pro o e sta d rd Fin l a pro al of th IE E

sta d rd d c me t is giv n b th IE E Sta d rd As o iatio (IE E-SA) Sta d rd Bo rd

3) IEC/IE E Pu lc tio s h v th form of re omme d tio s f or intern tio al u e a d are a c pte b IEC

Natio al Commite s/IE E So ietie in th t s n e Whie al re s n ble eff orts are ma e to e s re th t th

te h ic l c nte t of IEC/IE E Pu lc tio s is a c rate, IEC or IE E c n ot b h ld re p n ible for th wa in

whic th y are u e or for a y misinterpretatio b a y e d u er

4) In ord r to promote intern tio al u if ormity, IEC Natio al Commite s u d rta e to a ply IEC Pu lc tio s

(in lu in IEC/IE E Pu lc tio s) tra s are tly to th ma imum e te t p s ible in th ir n tio al a d re io al

p blc tio s An div rg n e b twe n a y IEC/IE E Pu lc tio a d th c re p n in n tio al or re io al

p blc tio s al b cle rly in ic te in th later

5) IEC a d IE E d n t pro id a y ate tatio of c nformity In e e d nt c rtific tio b die pro id c nformity

a s s me t s rvic s a d, in s me are s, a c s to IEC mark of c nformity IEC a d IE E are n t re p n ible

f or a y s rvic s c rie o t b in e e d nt c rtif i atio b die

6) Al u ers s o lde s re th t th y h v th late t e itio of this p blc tio

7) No la i ty s al ata h to IEC or IE E or th ir dire tors, emplo e s, s rv nts or a e ts in lu in in ivid al

e p rts a d memb rs of te h ic l c mmite s a d IEC Natio al Commite s, or v lu te rs of IE E So ietie

a d th Sta d rd Co rdin tin Commite s of th IE E Sta d rd As o iatio (IE E-SA) Sta d rd Bo rd,

f or a y p rs n l injury, pro erty d ma e or oth r d ma e of a y n ture wh ts e er, wh th r dire t or in ire t,

or for c sts (in lu in le al fe s) a d e p n e arisin o t of th p blc tio , u e of, or rela c u o , this

IEC/IE E Pu lc tio or a y oth r IEC or IE E Pu lc tio s

8) Ate tio is drawn to th n rmativ refere c s cite in this p blc tio Us of th ref ere c d p blc tio s is

in is e s ble f or th c r e t a plc tio of this p blc tio

9) Ate tio is drawn to th p s ibi ty th t impleme tatio of this IEC/IE E Pu lc tio ma re uire u e of

material c v re b p te t rig ts By p blc tio of this sta d rd, n p sitio is ta e with re p ct to th

e iste c or v ldity of a y p te t rig ts in c n e tio th rewith IEC or IE E s al n t b h ld re p n ible f or

id ntifyin Es e tial Pate t Claims for whic a lc n e ma b re uire , f or c n u tin in uirie into th le al

v ldity or s o e of Pate t Claims or d terminin wh th r a y lc n in terms or c n itio s pro id d in

c n e tio with s bmis io of a L ter of As ura c , if a y, or in a y lc n in a re me ts are re s n ble or

n n-dis rimin tory Us rs of this sta d rd are e pre sly a vis d th t d termin tio of th v ldity of a y p te t

rig ts, a d th ris of infin eme t of s c rig ts, is e tirely th ir own re p n ibi ty

© IEC/IEEE 2 15

International Stan ard IEC/IEEE 6 0 9-3 -1 has b en pre ared by IEC tec nical commite

31: Eq ipment f or explosive atmospheres, in co p ration with the Petroleum & Chemical

In u try Commite of the IEEE In u trial Ap l cation Society u der the IEC/IEEE Dual L go

Agre ment

This publ cation is publ s ed as an IEC/IEEE Dual L go stan ard

NOT A lst of IE E p rticip nts c n b f ou d at th f olowin URL:

htp:/sta d rd e e.org/d wnlo d /6 0 9/6 0 9-3 - -2 15/6 0 9-3 - -2 15_wg-p rticip nts.p f

This f irst edition of IEC/IEEE 6 0 9-3 -1 can els an re laces the first edition of IEC 6 0

9-3 -1 publ s ed in 2 0 an con titutes a tec nical revision

This edition in lu es the fol owin sig ificant c an es, a art f rom the general revision an

updatin of the first edition of IEC 6 0 9-3 -1 an harmonization with IEEE Std 515, with

resp ct to the previou edition:

• the in lu ion of a minimum temp rature imp ct test;

• the ad ition of a mec anical proced re in the thermal sta i ty test;

• the in lu ion of a thermal p r orman e test to re lace the thermal saf ety req irements;

• the in lu ion of a secon proced re uti zin a plate fixture f or s e th temp rature

determination;

• the in lu ion of an ultraviolet an con en ation test;

• the revision an sig ificant exp n ion of doc mentation req irements;

• the ad ition of An exes coverin req irements for Division 1 an 2;

• the ad ition of a ta le coverin the a pl ca i ty of req irements f rom IEC 6 0 9-0;

• the ad ition of an An ex coverin trace he ter prod ct desig verif i ation methodolog

(f ormerly located in IEC 6 0 9-3 -2);

• the further harmonization of this edition with several national stan ard

The sig ifican e of c an es b twe n IEC 6 0 9-3 -1, Edition 1.0 (2 0 ) an IEC/IEEE

For sta i z d d sig s, a clarific tio for th n e for

v rific tio b te tin a d th a ditio of a ta le for

th s e if i re uireme ts

4.5.2 X

For c ntrole d sig s, a clarific tio f or th n e f or

v rific tio b te tin a d th a ditio of a ta le f or

Ad itio of a minimum temp rature imp ct te t 5.1.5 C1

Tex t delet ed

Tex t d let ed

Th re la eme t of th th rmal s f ety pro e ure with

a th rmal p rorma c pro e ure

Th a ditio of a s c n pro e ure uti zin a plate

f i ture f or th s stems meth d f or ma imum s e th

temp rature d termin tio

Ad itio of o td or e p s re te t 5.1.16 C4

Re uireme t c a g d f or th markin of th minimum

in talatio temp rature

Ad itio of An e s e ifyin tra e h atin d sig

v rific tio meth d lo y, mo e f rom IEC 6 0 9-3 -2

Ad itio of An e f or th Divisio meth d of are

cla sific tio th t ma b a ple b s me u ers

Ad itio of An e f or th Divisio meth d of are

cla sific tio th t ma b a ple b s me u ers

NOT Th te h ic l c a g s refere to in lu e th sig if i a c of te h ic l c a g s in th re is d IEC

Sta d rd, b t th y d n t f orm a e h u tiv lst of al mo if i atio s fom th pre io s v rsio

editorial cor ection

These are c an es whic modify req irements in an editorial or a minor tec nical way They

in lu e c an es of the wordin to clarify tec nical req irements without an tec nical c an e,

or a red ction in level of existin req irement

Exte sion ad ition of tec nical o tion

These are c an es whic ad new or modify existin tec nical req irements, in a way that

new o tion are given, but without in re sin req irements f or eq ipment that was ful y

compl ant with the previou stan ard Theref ore, these wi not have to b con idered for

prod cts in conf ormity with the precedin edition

Tex t d let ed

© IEC/IEEE 2 15

Major te hnic l c a ge

ad ition of tec nical req irements

in re se of tec nical req irements

These are c an es to tec nical req irements (ad ition, in re se of the level or removal)

made in a way that a prod ct in conf ormity with the precedin edition wi not alway b a le

to f ulfi the req irements given in the later edition These c an es have to b con idered for

prod cts in conformity with the precedin edition For these c an es ad itional information is

provided in clau e B) b low

NOT Th s c a g s re re e t c re t te h olo ic l k owle g Howe er, th s c a g s s o ld n t n rmaly

h v a in u n e o e uipme t alre d pla e o th mark t

B) Inf ormation about the ba k round of ‘Major Te hnic l Cha ge ’

C1 – The req irements for ad itional mec anical testin have b en in lu ed f or

harmonization an f or ad ed saf ety

C2 – The req irements for thermal p r orman e have be n in lu ed to recog ize the

neces ity for thermal sta i ty of prod cts in explosive atmospheres

C3 – A secon proced re uti zin a plate f i ture has b en in lu ed f or s e th temp rature

determination, whic may b u ed in l eu of the s e th temp rature verification p rt of

5.1.13.4.2

C4 – An outdo r exp s re test has b en ad ed to cover prod cts that may b exp sed to

s nl g t an moisture in the inten ed a pl cation

C5 – Ad itional markin an doc mentation req irements have b en ad ed to provide

ad itional inf ormation to the en u er

C6 – The trace he tin desig verification methodolog has b en added to al g with the

evaluation req irements f or the sta i zed desig an the control ed desig method of

maximum s e th temp rature determination

The text of this stan ard is b sed on the fol owin IEC doc ments:

FDIS Re ort o v tin

31/1 91/FDIS 31/12 1/RV

Ful information on the votin for the a proval of this stan ard can b f ou d in the re ort on

votin in icated in the a ove ta le

International stan ard are draf ted in ac ordan e with the rules given in the ISO/IEC

Directives, Part 2

This stan ard is inten ed to b u ed in conju ction with IEC/IEEE 6 0 9-3 -2:2 15,

Ex plosiv atmosp eres – Part 3 -2: Electric l resistan e tra e h atin – Ap li ation g id e for

design, instal lation a d maint en n e

A l st of al p rts of IEC 6 0 9 series, u der the general title Ex pl osiv at mosp eres, can b

f ou d on the IEC we site

IEC/IEEE 6 0 9-3 -1:2015 – 9 –

© IEC/IEEE 2 15

The IEC Tec nical Commite an IEEE Tec nical Commite have decided that the contents

of this publ cation wi remain u c an ed u ti the sta i ty date in icated on the IEC we site

u der "ht p:/we store.iec.c " in the data related to the sp cific publ cation At this date, the

A bi n ual version of this publcation may b is ued at a later date

IMPORTANT – The 'colour inside' logo on the cov r pa e of this publ c tion indic te

th t it contains colours whic are considere to be us f ul for the cor e t

und rsta ding of its conte ts Us rs s ould theref ore print this doc me t using a

colour printer

© IEC/IEEE 2 15

INTRODUCTION

IEC/IEEE 6 0 9-3 -1 is inten ed to provide a comprehen ive overview of the es ential

requirements an testin a pro riate to electric s r ace he tin eq ipment u ed in explosive

atmospheres The req irements of this p rt of IEC 6 0 9 are con idered to b the minimum

requirements f or eq ipment protection levels Gb, Gc, Db, an Dc in explosive atmospheres

for gases, d sts, an f ibres/f l in s Whi e some of this work alre d exists in national

stan ard or international stan ard , this stan ard has col ated mu h of this existin work an

con idera ly ad ed to it This stan ard also contain the minimum req irements for u ers

a plyin the Division method of are clas ification

IEC/IEEE 6 0 9-3 -1:2015 – 1 –

© IEC/IEEE 2 15

EXPLOSIVE ATMOSPHERES –

Part 30-1: Electrical resistance trace heating –

General and testing requirements

1 Scope

This p rt of IEC 6 0 9 sp cifies general an testin req irements f or electrical resistan e

trace he ters for a plcation in explosive atmospheres with the ex lu ion of those for EPL Ga

an Da This stan ard covers trace he ters that comprise either factory or f ield (work-site)

as embled u its, an whic may b series trace he ters, p ral el trace he ters, trace he ter

p d , or trace he ter p nels that have b en as embled an /or terminated in ac ordan e with

the man f acturer’s in tru tion

This stan ard also in lu es req irements f or termination as embl es an control method

u ed with trace he tin s stems The explosive atmospheres refer ed to in this stan ard are

those defined in IEC 6 0 9-10-1 an IEC 6 07 -10-2

An exes D an E outl ne the a pl cation of this stan ard for those u ers a plyin the Division

method of are clas ification

This stan ard s p lements an modif ies the general req irements of IEC 6 0 9-0, ex e t as

in icated in Ta le 1 Where a req irement of this stan ard con icts with a req irement of

IEC 6 0 9-0, the req irement of this stan ard takes preceden e

Table 1 – Appl c tion or e clusion of spe ific cla s s of IEC 6 0 9-0

IEC 6 0 9-0

Ele tric l re istanc tra e he ters an

integral comp nents

(inf ormative)

Claus / S bclaus title

© IEC/IEEE 2 15

IEC 6 0 9-0

Ele tric l re istanc tra e he ters an

integral comp nents

(inf ormative)

Claus / S bclaus title

IEC/IEEE 6 0 9-3 -1:2015 – 13 –

© IEC/IEEE 2 15

IEC 6 0 9-0

Ele tric l re istanc tra e he ters an

integral comp nents

(inf ormative)

Claus / S bclaus title

(n rmative)

Gro p I an Gro p I Gro p I

of this sta d rd te ts of this sta d rd

ele tro tatic c arg o

e uipme t for Gro p I

© IEC/IEEE 2 15

IEC 6 0 9-0

Ele tric l re istanc tra e he ters an

integral comp nents

(inf ormative)

Claus / S bclaus title

IEC/IEEE 6 0 9-3 -1:2015 – 15 –

© IEC/IEEE 2 15

IEC 6 0 9-0

Ele tric l re istanc tra e he ters an

integral comp nents

(inf ormative)

Claus / S bclaus title

(n rmative)

Gro p I an Gro p I Gro p I

An e A Su pleme tary re uireme ts

NOT 1 Cla s n mb rs in th thre rig t-h n c lumn of this ta le ref er to IEC/IE E 6 0 9-3

-NOT 2 Th cla s n mb r in th a o e ta le is s own for inf ormatio o ly Th a plc ble re uireme ts of

IEC 6 0 9-0 are id ntif i d b th cla s title whic is n rmativ

Ap le : this re uireme t of IEC 6 0 9-0 is a ple with ut c a g

Ex lu e : this re uireme t of IEC6 0 9-0d e n t a ply

Mo if i d: this re uireme t of IEC 6 0 9-0 is mo if i d a d taie in this sta d rd

2 Normativ referenc s

The fol owin doc ments, in whole or in p rt, are normatively ref eren ed in this doc ment an

are in isp n a le for its a pl cation For dated referen es, only the edition cited a ples For

u dated ref eren es, the latest edition of the ref eren ed doc ment (in lu in any

amen ments) a pl es

IEC 6 0 0-151:2 01, Intern tion l El ectrot ec nic l Vo a ul ary – Part 151: El ectric l a d

ma n t ic d evic s

IEC 6 0 0-4 6:2 0 , I ntern tion l Ele trotec nic l Vo a ul ary – P art 4 6: Equipme t for

ex pl osiv atmosph res

IEC 6 0 9-0:2 1 , Explosive at mosp eres – Part 0: Eq ipme t – Ge eral re uireme ts

IEC 6 6 5-1 -3, Fire h z rd test in – Part 1 -3: Test fl ames – 50 W fl ames – Ap arat us a d

c nfirmat io al t est methods

ISO 4 8 , Plast ics – Determinat io of c a g s in c l our a d variat ions in pro erties after

ex posure t o d ayl ig t u d er glas , n t ural we t hering or l ab rat ory l ight so rc s

ISO 4 9 -1, Pl astics – Methods of e p sure to la oratory li ht so rc s – P art 1: Ge eral

g id an e

ISO 4 9 -2, Pl ast ics – Methods of e p sure to l ab rat ory l ight so rc s – Part 2: Xe o -arc

lamps

© IEC/IEEE 2 15

ASTM D5 2 , Sta dard sp cific tio for la oratory b rn r used for smal-sc le b rning tests

o pl astic mat erials

ASTM G15 , Sta d ard pra t ic for o erat ing x en n arc l i ht a p ratus for ex posure ofn

n-met al lic materials

ma imum ambie t temperature

hig est sp cif ied ambient temp rature

3.1.2

minimum ambie t temperature

<trace he tin >

lowest ambient temp rature sp cif ied at whic trace he tin is o era le an p r orms

ac ordin to sp cif ied req irements (an on whic he t-los calc lation are b sed)

IEC/IEEE 6 0 9-3 -1:2015 – 17 –

© IEC/IEEE 2 15

3.3.3

power termination

termination a pl ed to the en of a trace he ter at whic the p wer is s p l ed

desig where the set p int of the a pl ca le temp rature controler or hig -l mit device is u ed

in esta l s in the maximum s e th temp rature

minimum p wer that me ts the desig req irements, in the sp cified ad erse con ition

(minimum ambient an maximum win velocity), af ter voltage an resistan e toleran es an

a pro riate safety factors have b en con idered

[SOURCE: IEC 6 0 0-4 6:2 0 , 4 6-2 -0 ]

3.7

ele tric l y conductiv cov ring

metal c s e th, metal c braid or other con u tive material

© IEC/IEEE 2 15

[SOURCE: IEC 6 0 0-4 6:2 0 , 4 6-2 -1 ]

3.1

he t sin

p rt that con u ts an dis ip tes he t away f om a workpiece

Note 1 to e try: Ty ic l h at sin s are pip s o s, pip s p orts a d items of larg ma s s c a v lv a tu tors

or p mp b die

[SOURCE: IEC 6 0 0-4 6:2 0 , 4 6-2 -12]

3.12

he t tra sf er aids

thermal y con u tive materials, s c as metal c f oi s or he t tran f er comp u d u ed to

in re se the he t tran fer eff i ien y fom trace he ters to the workpiece

inte ral compone ts

comp nents s c as he t s rin termination , cold le d con ection , moulded en se ls, or

spl ces, whic may conf orm to the general s a e of the trace he ter an are exp sed to the

same en ironments (s c as u der the thermal in ulation) as the trace he ter, that are not

inten ed to b re-u ed in the event of a re air or modif i ation, whic may b f actory

fa ricated or field as embled

3.15

ma imum continuous e pos re temperature (tra e he ter de-e ergize )

hig est al owa le contin ou temp rature to whic the trace he tin s stem may b exp sed

as declared by the man facturer

3.16

ma imum maintain temperature / ma imum continuous o eratin temperature (trac

he ter e ergize )

sp cified maximum workpiece temp rature the trace he ter o erates at contin ou ly as

declared by the man f acturer

3.17

ma imum intermit e t e pos re temperature (tra e he ter e ergize or d -e ergize )

hig est al owa le intermitent temp rature to whic a trace he ter may b exp sed, as

declared by the man f acturer

3.18

maintain temperature

sp cified temp rature of a workpiece or proces that the trace he ters s al b a le to

IEC/IEEE 6 0 9-3 -1:2015 – 19 –

© IEC/IEEE 2 15

3.2

ma imum with ta d temperature

maximum o eratin or exp s re temp rature that wi not ad ersely af fect the thermal sta i ty

of the trace he ter an its comp nent p rts

[SOURCE: IEC 6 0 0-4 6:2 0 , 4 6-2 -18]

3.21

minimum instal ation temperature

minimum temp rature at whic the trace he tin s stem may b han led an in tal ed

paral el tra e h ater(s)

he tin elements that are electrical y con ected in p ralel, either contin ou ly or in zones, so

that the wat den ity p r l ne l len th is maintained, ir esp ctive of an c an e in len th for

the contin ou typ or for any n mb r of dis rete zones

total p wer or p wer p r u it len th or u it s race are of a trace he ter, at rated voltage,

temp rature an len th or are

[SOURCE: IEC 6 0 0-4 6:2 0 , 4 6-2 -2 , modified (removal of "whic is normal y

expres ed in wat s, wats p r metre or wat s p r s uare metre")]

3.2

rate volta e

<trace he tin >

voltage as ig ed by the man f acturer to whic o eratin an p rf orman e c aracteristic of

trace he ters are ref er ed

he tin elements electrical y con ected in series with a sin le c r ent p th an with a sp cif i

resistan e at a given temp rature for a given length

[SOURCE: IEC 6 0 0-4 6:2 0 , 4 6-2 -2 ]

3.31

s e th

<trace he tin >

u if orm an contin ou metal c or non-metal c outer coverin en losin the trace he ter

u ed to provide protection again t influen e f rom the s r ou din s (cor osion, moisture etc.)

Note 1 to e try: Se o erja k t, 3.2

[SOURCE: IEC 6 0 0-4 6:2 0 , 4 6-2 -2 , modif ied (ad ition of Note 1 to entry)]

3.3

s e th temperature

<trace he tin >

temp rature of the outermost contin ou coverin that may b exp sed to the s r ou din

atmosphere

[SOURCE: IEC 6 0 0-4 6:2 0 , 4 6-2 -2 ]

3.3

stabi ize de ign

desig where the temp rature of the trace he ter, by desig an u e, sta i zes b low the

hig lmit temp rature, u der the most u f avoura le con ition , without the ne d for a

protective s stem to l mit the temp rature

[SOURCE: IEC 6 0 0-4 6:2 0 , 4 6-2 -2 ]

3.3

start up c r e t

c r ent resp n e of a trace he ter fol owin energization

[SOURCE: IEC 6 05 -4 6:2 0 , 4 6-2 -3 , modified ("immediately up n energizin "

re laced by " olowin energization")]

3.3

s stem doc me tation

<trace he tin >

information pre ared by the man facturer to al ow satisfactory u derstan in , in tal ation an

saf e u e of the trace he tin s stem

IEC/IEEE 6 0 9-3 -1:2015 – 21 –

© IEC/IEEE 2 15

3.3

temperature control er

device or combination of devices in orp ratin a me n of sen in temp rature an of

control n the p wer to the trace he ter

[SOURCE: IEC 6 0 0-4 6:2 0 , 4 6-2 -3 ]

3.3

temperature l mitin de ic

saf ety device that serves to switc of p wer to the trace he ter b f ore the maximum sp cified

device desig ed f or the purp se of prod cin he t on the prin iple of electrical resistan e an

typical y comp sed of one or more metal c con u tors an /or an electrical y con u tive

material, s ita ly electrical y in ulated an protected

[SOURCE: IEC 6 0 0-4 6:2 0 , 4 6-2 -3 ]

3.4

tra e h ater pa

trace he ter comprisin series or p ral el con ected elements havin s ff i ient flexibi ty to

conform to the s a e of the s r ace to b he ted

3.4

tra e h ater pa el

non-lexible trace he ter comprising series or p ralel con ected elements fa ricated to

conform to the general s a e of the s r ace to b he ted

3.4

tra e h ater unit

(tra e he ter s t)

series trace he ter, p ral el trace he ter, trace he ter p d or trace he ter p nel s ita ly

terminated in conformity with the manuf acturer’s in tru tion

3.4

tra e h atin

uti zation of electric trace he ters, trace he ter p d , trace he ter p nels an s p ort

comp nents, u ed to maintain or to raise the temp rature of contents in pipin , tan s an

as ociated eq ipment

[SOURCE: IEC 6 0 0-4 6:2 0 , 4 6-2 -3 , modif ied (removal of "external y a pl ed")]

© IEC/IEEE 2 15

3.4

tra e h atin s stem

uti zation of trace he tin in lu in al neces ary desig an in tal ation doc mentation

material that, when in taled on the outer s r ace of thermal in ulation, protects the thermal

in ulation f rom water or other lq id , fom ph sical damage cau ed by ice p lets, win or

mec anical a u e and f rom deterioration cau ed by solar radiation or atmospheric

contamination

[SOURCE: IEC 6 0 0-4 6:2 0 , 4 6-2 -4 , modif ied (re lacement of "sle t" by "ice p l ets")]

3.4

workpie e

<trace he tin >

o ject to whic a trace he ter is a pl ed

Note 1 to e try: Ex mple in lu e pro e s e uipme t s c a pipin , v s els, ta k , v lv s, in trume ts a d

simiar e uipme t

[SOURCE: IEC 6 0 0-4 6:2 0 , 4 6-2 -41, modif ied (ad ition of Note 1 to entry)]

4 Ge eral requirements

4.1 Ge eral

The req irements of this stan ard confirm that electrical resistan e trace he tin within the

s o e of this stan ard has b en desig ed an con tru ted so as to val date electrical, thermal

an mec anical d ra i ty an rel a le p rf ormance

Electrical resistan e trace he ters an integral comp nents s al comply with or b ex lu ed

f rom the req irements of IEC 6 0 9-0, as lsted in Ta le 1

Trace he ters s al b provided with an evenly-distributed electrical y con u tive coverin

that s al cover at least 7 % of the s r ace Trace he ter p d an p nels s al be

con tru ted s c that the electrical y con u tive coverin s al b o p site the s rf ace to b

he ted The electrical y cond ctive coverin s al either b s ita le f or u e in the p rtic lar

atmosphere(s) or have a s ita le non-metal c overjac et over the coverin The man facturer

s al declare the maximum with tan temp rature in degre s Celsiu The materials u ed in

the trace he ter an integral comp nents s al with tand a temp rature of no les than the

man facturer's declared maximum with tan temp rature + 0 K, when tested in ac ordan e

with 5.1.1 The man f acturer s al provide doc mentation of the sp cification of non-metal c

materials on whic the mec anical stren th an the electrical in ulation de en (b twe n the

he ter an other con u tive p rts) whic s al in lu e identification of the material typ

4.2 Me ha ic l stre gth

The mec anical stren th of trace he ters s al b determined by the tests in 5.1.5, 5.1.6,

5.1.7 an 5.1.1

Trace he ters whic are identified for u e only in are s with a low ris of mec anical damage

are s bjected to a red ced energ in the imp ct tests in 5.1.5 an a red ced force in the

deformation test in 5.1.6, an s al b cle rly marked as sp cified in 7.4 e)

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Trace he ters may b s p led with ad itional mec anical protection to me t the

requirements of this stan ard if they are s p l ed as an integral as embly (prefa ricated), an

contain the f ol owing statement in the in tru tion : “This mec anical coverin s al not b

removed an the trace he ters s al not b o erated without the mec anical coverin b in in

place” In this case the tests in 5.1.5 an 5.1.6 s al b p r ormed with the ad itional

mec anical protection in tal ed on the trace he ter

4.3 Terminations a d conne tions

Termination an con ection may b identified as an integral p rt of a trace he ter, or may

b identified se arately, as Ex eq ipment or as Ex comp nents in ac ordan e with

IEC 6 0 9-0 Integral termination an con ection are tested as p rt of a re resentative

trace he ter u it; se 5.1.1

Electrical con ectors s p l ed with integral comp nents s al b certified for the c r en

t-car yin ca acity of the trace he tin con u tors declared by the man facturer an s al me t

the other pres rib d testin in this stan ard

Electrical resistan e trace he ter termination identif ied as se arate comp nents s al comply

with the req irements of one or more of the typ s of protection lsted in IEC 6 0 9-0 s ita le

f or the a pl cation, whic may b s p lemented an modified by the req irements of this

stan ard Se also Ta le 1

4.4 Circ it prote tion re uireme ts f or bra c circ its

The minimum req irements for trace he tin s stems f or u e in explosive atmospheres are as

f ol ows:

a) a me n of isolatin al l ne con u tors f rom the s p ly;

b) over c r ent protection provided f or e c bran h circ it;

c) a me n of protectin again t e rth f aults by dis on ectin al l ne con u tors

1) For TT an TN s stems, e c trace he ter or trace he ter bran h circ it, the electrical

protection s al b ca a le of inter uptin hig imp dan e e rth f aults as wel as s

ort-cir cuit faults This s al b ac ompls ed by an e rth-ault protective device, or a

control er with e rth- ault inter uption ca a i ty for u e in conju ction with s ita le

circ it protection The prefer ed trip level is nominal 3 mA or 3 mA a ove an

in erent ca acitive le kage c aracteristic of the he ter as sp cif ied by the trace he ter

s p l er

2) For IT s stems, an electrical in ulation monitorin device s al b in tal ed to

dis on ect the s p ly whenever the electrical resistan e is not gre ter than 5 Ω/V of

rated voltage

Ex e tion: Where con ition of maintenan e an s p rvision en ure that only q al f ied

p rson service the in taled s stems, an contin ed circ it o eration is neces ary f or the

safe o eration of the eq ipment or proces es, e rth-f ault detection without inter uption is

ac e ta le if alarmed in a man er to as ure an ac nowled ed resp n e

The req irements of a), b), an c) may b p rormed by one device

NOT 1 Th a plc tio of th a o e e c ptio is inte d d to b at th dis retio of th e d u er

NOT 2 This informatio is s e if i d to b pro id d with th pro u t d c me tatio a in ic te in Cla s 7

4.5 Temperature re uireme ts

4.5.1 Ge eral

A trace he tin s stem s al b desig ed so that the s e th temp rature of the trace he ters

is l mited to the temp rature clas or ig ition temp rature, min s 5 K for temp ratures les

than or eq al to 2 0 °C or min s 10 K f or temp ratures gre ter than 2 0 °C The maximum

© IEC/IEEE 2 15

s e th temp rature of the trace he ter s al also b les than the maximum with tan

temp rature

Maximum s e th temp ratures of trace he ters s al b determined f or the pro er a plcation

of the he ter The s e th temp rature is de en ent on the he ter p wer output den ity,

overal he t tran f er co ficient, an the temp rature of the s rf ace b in he ted

This s al b ac ieved either by:

1) determinin the trace he ter's maximum s e th temp rature ac ordin to the prod ct

clas ification method in ac ordan e with 5.1.13.3;

2) a sta i zed desig in ac ordan e with 4.5.2; or

3) a controled desig in ac ordan e with 4.5.3

For 2) an 3) a ove, when multiple trace he ters (esp cial y on pip s with diff erent flow

con ition ) are group d together u der a sin le temp rature control device, e c desig

con ition s al b analy ed

Req irements for eq ipment for u e in faci ties u in the Division method of are

clas ification are given in An ex D

4.5.2 Stabi ze d sign

The maximum s e th temp rature o tained by sta i zed desig is b sed on the energ

b lan e of he t los an he t prod ction of a s stem The energ b lan e is determined by

calc lation b sed on s stem p rameters

The desig calc lation , s stem p rameters an method f or sta i zed desig s al b

demon trated to the certif i ation b dy by the man facturer by comp rison to the test res lts

f rom 5.1.13.2 Ta le 2 gives the desig con ition for variou eq ipment protection levels for

the sta i zed desig a pro c

Desig con ition of no-win , the maximum ambient temp rature an the s stem he t

tran f er co f ficient s al b u ed to calc late the maximum workpiece temp rature an

maximum s e th temp rature Guidan e f or the desig calc lation is provided in An ex C

Table 2 – She th temperature de ign conditions ba e on e uipme t

prote tion le els – Stabi ize de ign ap roa h

Perc nt of o eratin v lta e 1 0 1 0

Ma imum work ie e temp rature f or c lc latio

-a

a

ma imum s e th temp rature- s e An e C

4.5.3 Control e d sign

4.5.3.1 Ge eral

The maximum s e th temp rature o tained throu h controled desig is b sed on energ

l mitation by temp rature control ers or l mitin devices These protective temp rature lmitin

devices are to b set to a temp rature no gre ter than the maximum alowa le s e th

temp rature cor esp n in to the temp rature clas red ced by;

(1) the predicted temp rature diff eren e b twe n the temp rature lmiter's set p int an the

maximum s e th temp rature of the trace he ter, an by

Tex t delet ed

IEC/IEEE 6 0 9-3 -1:2015 – 2 –

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(2) the amou t sp cif ied in 4.5.1

There are thre control ed desig method for l mitin the maximum s e th temp rature

These are only s ita le for situation where the workpiece is not s bjected to ad itional

sources of he t

a) By l mitin the maximum workpiece temp rature The temp rature control sen or an /or

the temp rature l miter sen or is in tal ed directly on the workpiece

b) By u in a hig temp rature lmiter with the sen or at ac ed to the trace he ter whic is

in tal ed on the workpiece Eac a pl cation req ires cor elation for the sp cific trace

he ter, p wer output level, an the l miter/sen or c aracteristic

c) By cre tin an artificial hot sp t where a hig temp rature l miter sen or is atac ed to the

trace he ter whic is located on a thermal in ulation sp cer on the workpiece Eac

a pl cation req ires cor elation for the sp cif i trace he ter, p wer output level,

l miter/sen or c aracteristic , an in ulation sp cer

The manuf acturer predicts the of fset (∆T

of fs t) b twe n the trace he tin s e th temp rature

an the temp rature control device’s set p int F r desig con ition se Ta le 3 The

man f acturer s al s p ort the calc lation method f or s e th temp rature by comp rin the

predicted res lts to test res lts f rom 5.1.13.2

NOT For c lc latio of ∆T

ofset (= T

s– T

L) refer to An e C ∆T

ofset

is th empiric ly d termin d temp rature

dif fere c b twe n th s n or a d th a tu l ma imum tra er s e th temp rature ∆T

ofset

is a fu ctio of

v ria le s c a g ometry a d ma s of tra e h ater a d s n or, p wer o tp t of th tra e h ater, h at tra sfer

c ef ficie t, a d c ntrol s stem h stere is

Table 3 – She th temperature d sign conditions ba e on e uipme t

prote tion le els EPLs – Control e de ign ap roa h

Perc nt of o eratin v lta e 1 0 1 0

Ma imum work ie e temp rature f or c lc latio

4.5.3.2 Re uireme ts for temperature control de ic s f or EPLs Gb a d Db

A temp rature l miter or simiar control device s al de-energize the s stem to prevent

ex e din the maximum p rmis ible s e th temp rature An device u ed for temp rature

control s al satisfy req irements for EPLs Gb an /or Db

Ad itional y a hig temp rature l mit fu ction s al:

1) o erate in e en ently f om the temp rature control er;

2) de-energize the trace he ter when the set p int of the hig temp rature lmiter is re c ed;

3) an u ciate when the hig temp rature lmit fu ction is activated;

4) have a hig l mit fu ction that req ires ac nowled ement to b reset;

5) mec anical y or electronical y loc the hig l mit set p int of the device to prevent

u authorized ac es ;

6) have a safety fu ction that de-energizes the circ it if the temp rature sen or malf un tion ;

7) b p s ible to re-set only after the normal o eratin con ition have b en returned, or if

the switc in state is monitored contin ou ly;

© IEC/IEEE 2 15

8) b evaluated to a minimum of 10 ,0 0 c cles of en uran e when multiple devices are

u ed f or control n an l mitin

4.5.3.3 Re uireme ts for temperature control de ic s f or EPLs Gc a d Dc

A sin le temp rature control er may b sp cified provided that it in orp rates an u ciation of

f ai ure con ition an has b en evaluated f or a minimum of 2 0 0 0 c cles of o eration

Alternatively, temp rature control devices ac ordin to 4.5.3.2 may b sp cif ied

If a sin le temp rature control er with fai ure an u ciation is sp cified, provision of adeq ate

monitorin of s c an an u ciation, s c as 2 h s rvei an e, s al b made

5 Testing

5.1 Type te ts

5.1.1 Ge eral

The provision of IEC 6 0 9-0 as sp cif ied in Ta le 1 a ply with the fol owin ad ition

Samples of trace he ters at le st 3 m in len th, u les otherwise sp cified, s al b selected

f or testin Tests s al b con u ted at a temp rature b twe n 10 °C an 4 °C unles

otherwise stated Integral comp nents s al b s bjected to the same tests as the trace

he ter, ex e t where otherwise noted The test samples ne ded for the typ tests are

s mmarized in An ex A

NOT As s e if i d in IEC 6 0 9-0, d e to th s fety fa tors in orp rate in th ty e of prote tio , th

u c rtainty of me s reme t in ere t in g o q alty, re ularly c lbrate me s reme t e uipme t is c n id re to

h v n sig ific nt d trime tal eff ect a d n e n t b ta e into a c u t wh n ma in th me s reme ts

n c s ary to v rif y c mpla c to this sta d rd

5.1.2 Diele tric te t

The dielectric test s al b p rf ormed on trace he ters in ac ordan e with Ta le 4 on test

sample(s) pre ared as des rib d in 5.1.1

Table 4 – Te t volta e f or the diele tric te t

Rated v ltage Te t v ltage

The test voltage, where U is the rated voltage, s al b a pl ed b twe n the con u tors an

the electrical y con u tive coverin at a rate of rise of neither les than 10 V/s nor more than

2 0 V/s an maintained for (6

−0

+5

s without dielectric bre k own The test voltage waveform

s al b es ential y sin soidal, with a f req en y of 4 Hz to 6 Hz Alternatively the dielectric

test may b con u ted by s bmerging the trace he ter in ta water at ro m temp rature

(resistivity typical y 5 0 Ω·m) The grou d braid or s e th s al b b n ed to the water an

the voltage s al b a pl ed b twe n the con u tors an the water

When determinin U, the cor ect u e of Phase to Phase or Phase to Neutral voltage levels

s al b con idered

For typ tests 5.1.5, 5.1.6, 5.1.7, 5.1.8, 5.1.9, 5.1.1 , an the routine test in 5.2.1, for MI trace

he ters the req ired test voltage is red ced to 2U + 5 0 V a.c for trace he ters rated over

IEC/IEEE 6 0 9-3 -1:2015 – 2 –

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3 V a.c or to

2

U + 5 0 V d.c for trace he ters rated over 6 V d.c d e to the dielectric

c aracteristic of the MI trace he ter con tru tion an electrical in ulation materials

5.1.3 Ele tric l ins lation re ista c te t

The electrical in ulation resistan e test s al b con u ted after the dielectric test sp cif ied in

5.1.2 on the same test sample(s) The resistan e of the electrical in ulation s al b

me s red b twe n con u tors an the electrical y con u tive coverin , by me n of a d.c

source voltage (nominal) of 5 0 V The me s red value s al b not les than 5 MΩ

Alternatively the in ulation resistan e test may b con u ted by s bmergin the trace he ter

in ta water at ro m temp rature (resistivity typical y 50 Ω·m) The grou d braid or s e th

s al b b n ed to the water an the voltage s al b a pl ed b twe n the con u tors an the

water

5.1.4 Flammabi ity te t

A flamma i ty test s al b p r ormed on trace he ters an on trace he ters with integral

comp nents The ful ran e of sizes s al b ca a le of complyin with the test The test s al

b car ied out in a ro m f e fom drau hts an in a flame c amb r or fume ho d with a

minimum volume of 0,5 c bic metres F r trace he ters, the sample s al b at le st 4 0 mm

in len th, an s al b s p orted in a vertical p sition For trace he ter p d an p nels (as

a pl ca le) the sample width s al b 8 mm

A g mmed u ble c ed p p r in icator s al b wra p d on e arou d the sample so that it

projects 2 mm fom the sample The p p r in icator s al b p sitioned 2 0 mm a ove the

p int at whic the in er blue cone of the flame contacts the sample A layer of dry, pure

s rgical coton not more than 6 mm in de th s al b placed u derne th the sample so that

the distan e f rom the cot on to the p int of the flame a pl cation is 2 0 mm

A la oratory burner as des rib d in IEC 6 6 5-1 -3 or in ASTM D 5 2 s al b u ed for the

test The f uel s al b methane, natural gas, pro ane, or butane with the fol owin pro erties:

a) Methane or natural gas – For methane: tec nical grade, 9 % minimum purity; For

methane or natural gas: he tin value of (3 ± 1) MJ/m

As s own in Fig re 1, the f lame s al b adju ted to a 13 mm heig t with a 4 mm in er blue

cone The burner s al b tited to an an le of 2 ° f om the vertical an the flame a pl ed to

the trace he ter so that the tip of in er blue cone of the flame tou hes the sp cimen at a p int

2 0 mm b low the u ble c ed p p r in icator an a proximately 15 mm f rom the b t om of

the sample For termination as embl es, the flame s al b set s c that it contacts the

material at the most v lnera le p int Clamps u ed to s p ort the sample s al be a ove the

p p r in icator an at le st 8 mm b low the p int of flame a plcation For trace he ter p d

an p nels, the flame is a pl ed at the horizontal mid-p int of the sample, with the

u ble c ed p p r in icator vertical y a ove the flame u in dimen ion as s own in Fig re 1

The la oratory burner s al b moved toward the sample u ti the in er blue cone tou hes

the sample; se Fig re 1 The flame s al b a pl ed f or 15 s, then removed for 15 s, u ti five

s c a pl cation have b en made

The test res lts s al b con idered satisfactory if the trace heater do s not s p ort

combu tion f or more than 1 min after the fifth a pl cation of the flame, do s not burn more

than 2 % of the exten ed u ble c ed p p r in icator, an do s not ig ite the coton fom

burnin fal n p rticles