Iec 60424 2 2015

International Stan ard IEC 6 4 4-2 has b en pre ared by tec nical commit e 51: Mag etic comp nents an f er ite materials.. This secon edition can els an re laces the f irst edition publ

THIS PUBLICATION IS COPYRIGHT PROTECTED

Copyr ight © 2 15 IEC, Ge e a, Switzer la d

Al rig ts r es r ve Unle s oth rwis s e ifi d, n p rt of this p blc tio ma b r epr od c d or uti z d in a y form

or b a y me n , ele tr onic or me h nic l in lu in p oto o yin a d microfim, with ut p rmis io in wr itin from

eith r IEC or IEC's memb r Natio al Commite in th c u tr y of th re u ste If y u h v a y q e tio s a o t IEC

c p r i ht or h v a e q ir y a o t o tainin a ditio al ri hts to this p blc tio , ple s c nta t th a dr es b low or

y ur lo al IEC memb r Natio al Commite for ur th r informatio

Dr oits d r eprod ctio ré er vé Sa f in ic tio c ntraire, a c n p rtie d c te p blc tio n p ut êtr e repro uite

ni uti s e s u q elq e forme q e c s it et p r a c n pro é é, éle troniq e o mé a iq e, y c mp s la p oto o ie

et le micr ofilms, s n la c rd é rit d l EC o d Comité n tio al d l EC d p y d d ma d ur Si v u a e d s

q e tio s s r le c p r i ht d l EC o si v u d sire o te ir d s droits s p léme tair es s r c te p blc tio , uti s z

le c ord n é s ci-a r ès o c nta te le Comité n tio al d l EC d v tr ep y d résid n e

Th Intern tio al Ele trote h ic l Commis io (IEC) is th le din glo al org niz tio th t pr ep res a d p bls e

Internatio al Sta d r ds for al ele tri al ele tr onic a d relate te h olo ie

Abo t IEC p blc tio s

Th te h ic l c nte t of IEC p blc tio s is k pt u d r c n ta t r eview b th IEC Ple s ma e s re th t y u h v th

late t e itio ,a c rrig n a or a ame dme t mig t h v b e p bls e

IEC Cat alo ue - webst ore.e ch/ cat alo ue

Th st an -alo e a plc t io for c n ultin th e tire

biblo ra hic l informat io o IEC Intern tio al Sta d rd ,

Te h ic l Sp cific tio s, Te h ic l R ep rts a d oth r

d c me ts A v aia le for P , Ma OS, A ndroid Ta let s a d

iPa

IEC p blc t i ns s arch - www ie ch/ se rch u

Th a v an e s arc e a le to fin IEC p blc t io s b a

variety of crit eria (efere c n mb r, t ext, t ec nic l

c mmitt e,…) It als gives informatio o projec t s, re la e

a d wit hdrawn p blc tio s

IEC Just P blshed - webst ore.e ch/ just pu lshed

St ay u to d te o al n w IEC p blc t io s Ju t Pu ls e

d t ais al n w p blc t io s rele s d A v aia le o ln a d

als o c a mo t h b emai

Ele t ro edia - www ele t ro edia.org

Th world's le din o ln dic t io ary of elec t ro ic a d

ele t ric l t erms c nt ainin more th n 3 0 0 terms a d

d finitio s in En ls a d Fre c , wit h e uiv ale t t erms in 15

a ditio al la g a e Als k nown a t he Int ern t io al

Elec t rot ec nic l Vo a ulary (IEV ) o ln

IEC Glos ar y - st d.e ch/ glos ary

More t ha 6 0 0 ele t rot ec nic l termin lo y e t rie in

En ls a d Fre c e tra t ed fom t he Terms a d Definitio s

cla s of IEC p blc t io s is u d sin e 2 0 Some e t rie

h v e b e c le t ed fom e rler p blc tio s of IEC TC 3 ,

7 ,8 a d CISPR

IEC Cust omer Servic Cent re - webst ore.ec ch/ csc

If y ou wis to giv e u your fe d a k o t his p blc tio or

n e furt her a sist an e, ple s c nt act h Cu t omer Serv ic

Ce t re:c c@ie c

A pro os de l'IEC

L Commis io Ele trote h iq e Inter natio ale (IEC) e t la premièr e orga is tio mo diale q i éla or e et p ble d s

Norme internatio ale p ur to t c q i a trait à léle tri ité,à léle tr oniq e et a x te h olo ie a p re té s

A pro os de p blc t i ns IEC

L c nte u te h iq e d s p blc tio s IEC e t c n tamme t rev Ve i e v u a s r er q e v u p s é e lé itio la

plu r éc nte, u c r rig n um o ame d me t p ut a oir été p blé

Cat alo ue IEC - webst ore.e ch/ cat alo ue

Applc t io a t on me p ur c n ult er t ou le re s ig eme t s

biblo ra hiq e s r le Norme intern t io ale ,

Sp cific t io s t ec niq e , R ap ort s te h iq e et a tre

d c me ts d l EC Dis o ible p ur P , Ma OS, t ablett es

A ndroid et iPa

Recherche de p blc t i ns IEC - w ww ie ch/ se rch u

L re h rc e avan é p rmet d t ro ver d s p blc tio s IEC

e uti s nt difére t s crit ère (n méro d référe c , t exte,

c mit é d’ét ud s,…) Ele d n e a s i d s informatio s s r le

projets et le p blc t io s remplac ée o retiré s

IEC Just P blshed - webst ore.e ch/ just pu lshed

R este informé s r le n uvele p blc t io s IEC Ju t

Pu ls e d tai e le n uv ele p blc t io s p ru s

Dis o ible e lg e et a s i u e fois p r mois p r emai

Ele t ro edia - www.ele t ro edia.org

L premier dic t io n ire e lg e d t erme éle tro iq e et

éle triq e I c ntie t plu d 3 0 0 terme et d finit io s e

a glais et e fa ç is, ain i q e le terme é uiv ale t s d n

15 la g e a ditio n le Eg leme t a p lé Vo a ulaire

Elec trote h iq e Int ern tio al (IEV) e lg e

Glos aire IEC - st d.e c h/ glos ar y

Plu d 6 0 0 e t ré s t ermin lo iq e élec t rot ec niq e , e

a glais et e fa ç is, e traite d s art icle Terme et

Définit io s d s p blc tio s IEC p ru s d p is 2 0 Plu

c rt ain s e tré s a t érie re e traite d s p blc t io s d s

CE 3 , 7 , 8 et CISPR d l EC

Serv ic Clent s - w ebst ore.e c h/ cs

Si vou d sire n u d n er d s c mme taire s r c tt e

p blc t io o si v ou av ez d s q e t io s c nt ac t ez-n u :

c c@iec c

W arnin ! Mak e s re that you o tain d this publc tion from a a t horize distributor

At te tion! V eui ez vou a s rer q e vou a ez o te u c t te publc t ion via u distribute r a ré

CONTENTS

FOREWORD 3

1 Sco e 5

2 Normative ref eren es 5

3 Limits of s rf ace ir eg larities 5

3.1 Vis al in p ction an recommen ed l mits 5

3.2 Chips an rag ed ed es 6

3.2.1 Chips an rag ed ed es on matin s rf aces 6

3.2 2 Chips an rag ed ed es on other s races

6 3.3 Crac s 9

3.4 Flas 10 3.5 Pul-outs 10 3.6 Cry tal tes 1

3 7 Pores 1

2 Bibl ogra h 13 Fig re 1 – Chips an rag ed ed es on matin s r aces 6

Fig re 2 – Crac s location – To view 9

Fig re 3 – Crac s location – Bot om view 9

Fig re 4 – Dimen ion W 10 Fig re 5 – Flas an pul -out location 1

Fig re 6 – Pul-out in clampin reces are 1

Fig re 7 – Cry tal tes location f or RM-core 1

Fig re 8 – Pores location for RM-core 12 Ta le 1 – Relevant s bclau es f or given ir eg larity vers s location 5

Ta le 2 – Al owa le c ip in are s 6

Ta le 3 – Are an len th ref eren es f or vis al in p ction 8

Ta le 4 – Limits f or crac s 10

Ta le 5 – W dimen ion 10

INTERNATIONAL ELECTROTECHNICAL COMMISSION

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 f ter ref ere 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 IEC c la orate clo ely

with th Intern tio al Org niz tio f or Sta d rdiz tio (ISO) 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

2) Th formal d cisio s or a re me ts 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 f rom al

intere te IEC Natio al Commite s

3) IEC Pu lc tio s h v th f orm 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 in th t s n e Whie al re s n ble ef forts are ma e to e s re th t th te h ic l c nte t of IEC

Pu lc tio s is a c rate, IEC c n ot b h ld re p n ible f or 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

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 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 its lf d e n t pro id a y ate tatio of c nf ormity In e e d nt c rtif i atio b die pro id c nf ormity

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 is 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 ld e 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 its 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 its te h ic l c mmite s a d IEC Natio al Commite s f or a y p rs n l injury, pro erty d ma e or

9) Ate tio is drawn to th p s ibi ty th t s me of th eleme ts of this IEC Pu lc tio ma b th s bje t of

p te t rig ts IEC s al n t b h ld re p n ible f or id ntifyin a y or al s c p te t rig ts

International Stan ard IEC 6 4 4-2 has b en pre ared by tec nical commit e 51: Mag etic

comp nents an f er ite materials

This secon edition can els an re laces the f irst edition publ s ed in 19 7 This edition

con titutes a tec nical revision

This edition in lu es the fol owin sig ificant tec nical c an es with resp ct to the previou

edition:

a) ad ition of cry tal tes in 3.6 an of p res in 3.7

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

Ful inf ormation on the votin for the a proval of this stan ard can b fou d in the re ort on

votin in icated in the a ove ta le

This publcation has b en draf ted in ac ordan e with the ISO/IEC Directives, Part 2

A l st of al p rts in the IEC 6 4 4 series, publ s ed u der the general title Ferite c res –

Guideln s o th lmits of sura e ire ularities, can b fou d on the IEC we site

Future stan ard in this series wi car y the new general title as cited a ove Titles of existin

stan ard in this series wi b updated at the time of the next edition

The commite has 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 "htp:/we store.iec.c " in the data related to

the sp cific publcation At this date, the publ cation wi b

• re laced by a revised edition, or

FERRITE CORES – GUIDELINES ON THE LIMITS

Part 2: RM-cores

This p rt of IEC 6 4 4 provides g idelnes on the alowa le lmits of s r ace ir eg larities

a plca le to RM-cores in ac ordan e with the relevant generic sp cification

This stan ard s ould b con idered as a sectional sp cification u eful in the negotiation

b twe n f er ite core man facturers an c stomers a out s rf ace ir eg larities Normative

referen e

The folowin 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 F r dated referen es, only the edition cited a ples For

u dated referen es, the latest edition of the ref eren ed doc ment (in lu in an amen ments)

a ples

3 Limits of surf ace ir egularities

To faci tate q ic identification of recommen ed l mits for a given ir eg larity b sed on its

location, the folowin s bclau es are s mmarized in Ta le 1

Table 1 – Rele a t s bcla s s f or giv n ir e ularity v rs s loc tion

3.2 Chips a d ra g d e ge

The are s of the c ips located on the matin s races (C1, C1′ an C1″ ir eg larities in

Fig re 1) s al not ex e d the f ol owin lmits:

– the c mulative are of the c ips s al b les than 4 % of the total matin s rf ace;

– the total len th of the rag ed ed es s al b les than 2 % of the p rimeter of the relevant

Figure 1 – Chips a d ra g d e ge on mating s rf ac s

Alowa le c ip in are s for a given core are s mmarized in Ta le 2

Table 2 – A llowable c ipping are s

The are s of the c ips located on the other s rf aces s al not ex e d the f olowin l mits:

– The al owa le c ip in are s are doubled as comp red to the lmits for the matin s r ace

(se Ta le 2)

– The rule f or the rag ed ed es is the same as for the matin s rf ace

– Chips an rag ed ed es are not ac e ta le on the rid e of the clampin reces are

2

R1'

C1'

C1'

– Chips an rag ed ed es are not ac e ta le on the in er ed es of the wire slot are

(se Fig re 1)

The are an len th referen es f or vis al in p ction are given in Ta le 3

Table 3 – A re a d le gth ref ere c s f or vis al inspe tion

IE C

3.3 Cra k

A sin le contin ou crac whic intersects the p rimeter of the relevant s rf ace at two p ints is

not ac e ta le (se S1, S1′ an S1″ ir eg larities in Fig re 2)

The l mits for crac s at variou location s own in Fig re 2 an Fig re 3 are given in Ta le 4

Figure 2 – Cra k loc tion – To view

NOT Th b u d ry b twe n th o ter wal a d th b c wal is s own b a d s e ln in Fig re 3

Figure 3 – Cra k loc tion – Bot om view

IE C

S8 S6'

Table 4 – Limits for cra k

NOT For c re with ut a h le in th c ntre-p st, th c ntre-p st thic n s is re la e b a h lf of th c ntre

-p st diameter, i e in Ta le 4 th lmit of "5 % of th c ntre-p st thic n s " b c me "2 % of th c ntre-p st

diameter, a d "c ntre-p st thic n s " b c me "h lf of th c ntre-p st diameter

The ac e tan e criteria for the size of a crac are b sed on the minimum thic nes W of the

outer wal of the relevant core size Ta le 5 an Fig re 4 give al W values a proximated as

(a – d

2) 2

Fig re 5 s ows examples of f las location for an RM-core

There s al b no flas exten in f rom the core into the wire slot

3.5 Pul -outs

Fig re 5 an Fig re 6 s ow examples of pul-outs location f or RM-core

The c mulative are of the pul -outs on the b tom s rf ace or the clampin reces are of the

core s al b les than 2 % of the total resp ctive s rf ace are (in lu in wire-way are s for

Figure 5 – Fla h a d pul -out loc tion

Figure 6 – Pul -out in clampin re e s are

Fig re 7 s ows examples of cry tal tes location f or an RM-core

– A sin le are of the cry tal tes located on an s rf ace s al b les than 2 % of the

resp ctive s race are

– The c mulative are of the cry tal tes located on an s r ace s al b les than 4% of the

resp ctive s race are

Figure 7 – Cry tal te loc tion f or RM-core

3.7 Pore

Fig re 8 s ows examples of p res location for an RM-core

– The n mb r of p res located on the same s race s al not ex e d 2 The total n mb r of

Bibl ogr aphy

[1] IEC 6 4 4-1, Ferite c res – Guideln s o th lmits of sura e ire ularities – P art 1:

Ge eral sp cific tio

[2] IEC 6 4 4-2, Ferite c res – Guideln s o th lmits of sura e ire ularities of ferite

c res – P art 2: RM-c res

[3] IEC 6 4 4-3, Ferite c res – Guideln s o the lmits of sura e ire ularities – P art 3:

[4] IEC 6 4 4-4, Fer ite cores – Guidel nes on the l mits of s r ace ir eg larities – P art 4: