Iec 60127 7 2015

IEC 601 27 7 Edition 2 0 201 5 09 INTERNATIONAL STANDARD Miniature fuses – Part 7 Miniature fuse links for special applications IE C 6 0 1 2 7 7 2 0 1 5 0 9 (e n ) ® Copyright International Electrotec[.]

IEC 601 27- 7

Miniat ure fuses –

Part 7: Miniat ure fuse- links for special appl cat ions

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IEC 601 27- 7

Edit io 2.0 2 15-0

Miniat ure fuses –

Part 7: Miniat ure fuse- link s for special appl cat ions

FOREWORD 3

INTRODUCTION 5

1 Sco e 6

2 Normative ref eren es 6

3 Terms an def i ition 7

4 General req irements 8

5 Stan ard ratin s 8

6 Markin 8

7 General notes on tests 9

8 Dimen ion an con tru tion 14 9 Electrical req irements 15 10 Stan ard s e ts 2

An ex A (informative) Guidan e on ratin s to b sp cified by the man facturer or to b agre d up n with the testin hou e 2

Biblogra h 2

Fig re 1 – Stan ard test b ard for fu e-l n s with wire termination 1

Fig re 2 – Test b ard for s rf ace mou t fu e-l n s 12 Fig re 3 – Test fu e b se 13 Fig re 4 – Test circ its for bre kin ca acity tests 16 Ta le 1 – Power factor an time con tant 17 Ta le 2 – Testin s hed le for in ivid al amp re ratin s f or a.c or d.c bre kin ca acity fu e-l n s 2

Ta le 3 – Testin s hed le for in ivid al amp re ratin s for a.c an d.c bre kin ca acity fu e-l n s 21

Ta le 4 – Testin s hed le for maximum amp re ratin of a homogene u series (a.c or d.c bre kin ca acity fu e-l n s) 2

Ta le 5 – Testin s hed le for maximum amp re ratin of a homogene u series (a.c an d.c bre kin ca acity fu e-l n s) 2

Ta le 6 – Testin s hed le for minimum amp re ratin of a homogene u series 2

Ta le 7 – Testin s hed le for al intermediate amp re ratin s of a homogene u series 2

Ta le A.1 – Guidan e on ratin s to b sp cified by the man f acturer or to b agre d up n with the testin hou e 2

INTERNATIONAL ELECTROTECHNICAL COMMISSION

Part 7: Miniature fuse-l nks for special appl cations

1 Th Intern tio al Ele trote h ic l Commis io (IEC) is a worldwid org niz tio for 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 f i ld 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 refer e to a “IEC

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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

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th later

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International Stan ard IEC 6 12 -7 has b en pre ared by s bcommit e 3 C: Miniature f uses,

of IEC tec nical commite 3 : Fu es

This secon edition can els an re laces the f irst edition publ s ed in 2 13

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

edition:

a) definin a test b ard for s rf ace mou t f use-l n s, Fig re 2;

b) definin test s hed les f or homogenou series

The text of this standard 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 publ cation 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 12 series, publs ed u der the general title Miniature fuses,

can b fou d on the IEC we site

This International Stan ard is to b u ed in conju ction with IEC 6 12 -1:2 0 , Miniature

fuses – Part 1: Definit ions for miniature fuses a d g n ral re uireme ts for miniat ure

fuse-li ks an its Amen ment 1 (2 1 )

The clau es of this stan ard s p lement, modify or re lace the cor esp n in clau es in

IEC 6 12 -1

Where there is no cor esp n in clau e or s bclau e in this stan ard, the clau e or

s bclau e of IEC 6 12 -1 a pl es without modif i ation as far as is re sona le When this

stan ard states “ad ition” or “re lacement , the relevant text in IEC 6 12 -1 is to b ada ted

ac ordin ly

Subclau es whic are ad itional to those in Part 1 are n mb red startin f om 101 Ad itional

an exes are n mb red AA, BB, etc

The commit e has decided that the contents of this publ cation wi remain u c an ed u ti

the sta i ty date indicated on the IEC we site u der "ht p:/webstore.iec.c " in the data

related to the sp cif i publ cation At this date, the publ cation wi b

recommen ation an other doc ments relatin to miniature fu es s ould have the same

publ cation n mb r in order to faci tate referen e to fu es in other sp cif i ation , for example,

eq ipment sp cif i ation

Furthermore, a sin le publ cation n mb r an s bdivision into p rts would faci tate the

esta ls ment of new stan ard , b cau e clau es containin general req irements ne d not

The IEC 6 12 series, u der the general he din Miniature fuses, is th s s bdivided as

f ol ows:

IEC 6 12 -1, Miniat ure fuses – P art 1: Definitio s for miniature fuses a d g n ral

re uireme ts for miniat ure fuse-l i ks

IEC 6 12 -2, Miniat ure fuses – Part 2: Cartridg fuse-l inks

IEC 6 12 -3, Miniat ure fuses – Part 3: Su -miniat ure fuse-l i ks

IEC 6 12 -4, Miniature fuses – Part 4: U niversal mod ul ar fuse-l i ks (UM F) – Thro g -h le

a d sura e mo nt typ s

IEC 6 12 -5, Miniature fuses – P art 5: Guid el ines for q a ty as es me t of miniature

fuse-li ks

IEC 6 12 -6, Miniat ure fuses – Part 6: Fuse-h l d ers for miniat ure fuse-l inks

IEC 6 12 -7, Miniat ure fuses – Part 7 : Miniature fuse-l inks for sp cial a pl ications

IEC 6 12 -8, (Fre for f urther doc ments)

IEC 6 12 -9, (Fre for f urther doc ments)

IEC 6 12 -10, Miniature fuses – Part 10: U ser g ide for miniat ure fuses

MINIA TURE FUSES –

Part 7: Miniature fuse-l nks for special appl cations

This p rt of IEC 6 12 covers req irements for miniature fu e-l n s for sp cial a pl cation

This p rt of IEC 6 12 is a plcable to f use-l n s with a rated voltage not ex e din 1 0 0 V,

a rated c r ent not ex e din 2 A an a rated bre kin ca acity not ex e din 5 kA

It do s not a ply to fu es completely covered by the s bseq ent p rts of IEC 6 2 9-1

It do s not a ply to miniature fu e-l n s f or a pl an es inten ed to b u ed u der special

con ition , s c as in cor osive or explosive atmospheres

This p rt of IEC 6 12 a pl es in ad ition to the req irements of IEC 6 12 -1

Miniature f use-l n s for sp cial a plcation are not inten ed to b re laced by the en -u er of

an electrical / electronic a pl an e

The o ject of this p rt of IEC 6 12 is to esta l s u iform test method f or miniature fu

e-l n s f or sp cial a plcation , so as to al ow verification of the values (for example meltin

time an bre kin ca acity values) sp cif ied by the man facturer

The f ol 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 f or its a pl cation For dated ref eren es, only the edition cited a ples For

u dated referen es, the latest edition of the referen ed doc ment (in lu in an

amen ments) a pl es

IEC 6 0 8-2-21:2 0 , Enviro me tal test ing – Part 2-21: Tests – Test U: Ro ustnes of

terminat io s a d int egral mo nting de ic s

IEC 6 12 -1:2 0 , Miniat ure fuses – Part 1: Definitions for miniature fuses a d g n ral

re uireme ts for miniature fuse-l i ks

IEC 6 12 -6:2 14, Miniature fuses – Part 6: F use-h l d ers for miniat ure fuse-links

IEC 6 6 4-1:2 0 , Insul at ion c ord in tion for e uipme t wit hin l ow-voltag systems – P art 1:

Principl es, re uireme ts a d t ests

IEC 6 6 5-2-12:2 10, Fire h z rd t est ing – P art 2-12: Gl owing/h t-wire b sed test methods –

Gl ow-wire fl amma ility index (GWFI ) test met hod for mat erials

IEC 6 6 5-2-12:2 10/AMD1:2 14

IEC 6 6 5-2-13:2 10, Fire h z rd test ing – Part 2-13: Gl owing/h t-wire b sed test met hods –

Glow-wire ig ition temp rat ure (GWIT) test method for materials

IEC 6 6 5-2-13:2 10/AMD1:2 14

IEC 6 6 5-4:2 12, Fire h z rd test in – P art 4: Terminol og c n ernin fire tests for

ele trot ec nic l prod ucts

IEC 612 9-2-7:2 0 , Materials for print ed b ards a d ot her interc n e ting stru tures – Part

2-7 : Reinforc d b se materials clad a d u cl ad – Epo id e woven E-gl as l aminat ed sh et of

defined flamma ility (v rtic l b rning test), c p er-clad

ISO 3:19 3, P refer ed n mb rs – Series of prefered n mb rs

3 Terms and def initions

For the purp ses of this doc ment, the terms an def i ition given in Clau e 3 of IEC 6 12

-1:2 0 , ex e t 3.5, as wel as the fol owin a ply

3.1

miniature f us -l nk f or spe ial appl c tions

en losed fu e-ln whic is not covered in IEC 6 12 -2, IEC 6 12 -3 or IEC 6 12 -4 an of

rated bre kin ca acity not ex e din 5 kA, with a width an heig t not ex e din 12 mm

an a len th not ex e din 5 mm

Note 1 to e try: Sp cial pre a tio s ma b n c s ary to e s re th t th fu e-ln s wi b re la e b a fu e-ln

with th s me te h ic l p rameters

Note 2 to e try: For fu e-ln s h vin a metal c c p at e c e d, a y memb r of termin ls or termin tio s oth r

th n th metal c c p s c a wire termin tio s, pin a d b lt-in c nta ts ma n t b in lu e in th total le gth of

test c r ent for testin at elevated temp rature of 7 °C

Note 1 to e try: Pref ere v lu s are 0,8 I

3.4

I

te t

(A)

test c r ent for en uran e testin ac ordin to method A

Note 1 to e try: Pref ere v lu s are 1,0 I

3.5

I

te t

(B)

test c r ent for en uran e testin ac ordin to method B

Note 1 to e try: Pref ere v lu s are 0,8 I

N

or 1,0 I

N

Note 1 to e try: Pref ere v lu s are 1,2 I

3.7

I

OVL

(B)

test c r ent for me s rin the maximum s stained dis ip tion ac ordin to method B

Note 1 to e try: Pref ere v lu s are 1,0 I

N

or 1,2 I

N

– rated c r ent (se stan ard s e t 1 for prefer ed ratin s);

– rated bre kin ca acity (a.c an /or d.c.);

The f ol owin may b agre d up n on an o tional b sis:

– test at elevated temp rature;

– time/c r ent c aracteristic (ad itional y at 2,7 I

N

an 4 I

N)

An ad itional sp cif ied values are given in stan ard s e t 1

NOT A s mb l d n tin th time/c re t c ara teristic c n ot b state , b c u e this p rt of IEC 6 12 d e

n t s e ify a y v lu s for this p rameter

Add ition:

e) Typ desig ation

f ) Rated bre kin ca acity in amp res (A) or in kio amp res (kA)

Furthermore the rated bre kin ca acity in amp res (A) or in ki o amp res (kA) s al b

marked on the p c age la el

6.4

Add ition ofh ad in titl e a d re l ac me t of t ext:

6.4 Colour codin f or miniature fus -l nk f or spe ial appl c tions

Markin of f use-l n s by me n of colour b n s ac ordin to IEC 6 12 -1:2 0 , An ex A, is

not p rmit ed It is, however, p s ible to u e colour markin s that cle rly diff er fom this

colour b n s stem In this case, the man facturer s al provide the relevant information, f or

example colour key

Add ition l su clause:

6.101 Where markin is impractica le d e to sp ce l mitation , the relevant inf ormation

s ould a p ar on the smal est p c age an in the man facturer’s tec nical l terature

Clau e 7 of IEC 6 12 -1:2 0 a pl es ex e t as fol ows

7.2 Type te ts

7.2.1

For testin the in ivid al c r ent ratin s of f uses with a.c or d.c bre kin ca acity, the

n mb r of f use-l n s req ired is 51, of whic 12 are ke t as sp res For f use-l n s with wire

termination six extra samples (E1 to E6) have to b taken by ran om an not sorted

ac ordin to voltage dro If neces ary, these samples can b u ed as ad itional sp res after

p rormin the tests ac ordin to 8.3

The testin s hed le is s own in Ta le 2

For testin the in ivid al c r ent ratin s of fu es with a.c an d.c bre kin ca acity, the

n mb r of fu e-l n s req ired is 6 , of whic 9 are ke t as sp res For fu e-l n s with wire

termination six extra samples (E1 to E6) have to b taken by ran om an not sorted

ac ordin to voltage dro If neces ary, these samples can b u ed as ad itional sp res after

p rormin the tests ac ordin to 8.3.The testin s hed le is s own in Ta le 3

For testin the maximum amp re ratin of a homogenou series with a.c or d.c bre kin

ca acity the n mb r of f use-l n s req ired is 51, of whic 2 are ke t as sp res For fu

e-l n s with wire termination six extra samples (E1 to E6) have to b taken by ran om an not

sorted ac ordin to voltage dro If neces ary, these samples can b u ed as ad itional

sp res after p rf ormin the tests ac ordin to 8.3

The testin s hed le is s own in Ta le 4

For testin the maximum amp re ratin of a homogenou series with a.c an d.c breakin

ca acity the n mb r of f use-l n s req ired is 6 , of whic 3 are ke t as sp res For f u

se-l n s with wire termination six extra samples (E1 to E6) have to b taken by ran om an not

sorted ac ordin to voltage dro If neces ary, these samples can be u ed as ad itional

sp res af ter p rf ormin the tests ac ordin to 8.3

The testin s hed le is s own in Ta le 5.

For testin the minimum amp re ratin of a homogenou series with a.c an / or d.c

breakin ca acity the n mb r of fu e-l n s req ired is 3 , of whic 16 are ke t as sp res

The testin s hed le is s own in Ta le 6

For testin al of the intermediate amp re ratin of a homogenou series with a.c an / or d.c

breakin ca acity the n mb r of fu e-l n s req ired is 3 , of whic 16 are ke t as sp res

For tests that req ire a printed circ it b ard f or mou tin an con ection of the fu e-l n s, a

test b ard ac ordin to Fig re 1 or Fig re 2 s al b u ed

The test b ard ac ordin to Fig re 1 s al b u ed for f use l n s with wire termination

inten ed f or in ertion in s ita ly desig ed holes or soc ets

The test b ard ac ordin to Fig re 2 s al b u ed for s rf ace mou t f use-l n s

When two or more fu e-l n s are tested in series, the f use-b ses s al b located so that

there wi b a sp cin of not les than 5 mm b twe n an two fu e-l n s u der testin The

con u tor con ectin the f use-b ses together, an con ectin the f use-b ses to the ammeter

an the source of s p ly s al b in ulated co p r wire The len th of e c con u tor s al b

5 0 mm an the cros -sectional are of the wire s al b a proximately 1 mm

Dime sion in mil l imet re

Key

O c p er la er; thic n s 0,0 5 mm or 0,0 0 mm

U c n e tio for v lta e dro me s reme t

D diameter of mm for rate c re ts u to a d in lu in 6,3 A;

diameter of ,5 mm f or rate c re ts e c e in 6,3 A

Fig re 1 – Sta d rd te t board for f us -l nk with wire termination

This test b ard s al b mou ted on the fu e-b se ac ordin to Fig re 3

Dime sion in mil l imet re

x e referin to Fig re 1 For smal d vic s, it ma b n c s ary to u e re u e tra k

width , re re e tin n rmal u e of th s d vic s This s o ld b re ord d in th te t re ort a d in th

ma uf acturer's lterature

P termin l s a in

R refer to sta d rd s e t 1, p g 1

T refer to sta d rd s e t 1, p g 1

NOT 1 Sold r re ist to b a ple in h tc e are s

Figure 2 – Te t board for s rfa e mount fus -l nk

This test b ard s al b mou ted on the fu e-b se ac ordin to Fig re 3

The lan are s s ould b s ita ly pre ared for solderin

A mec anical device may b u ed as lon as it is demon trated that the res lts are the same

Dime sion in mil l imet re

Fig re 3 – F s -ln s with wire terminatio s (printed circuit tra k u derne th)

Fig re 3b – S rf ac mo nt f us -ln (printed circuit tra k o to )

Dime sion in mil l imet re

A b s of low h at c n u tin material thic n s

E c nta t s rews h ldin s ld r termin l K siv r plate bra s s rew to ma e c nta t with th

The nominal thic nes of co p r layer may b 0,0 5 mm or 0,07 mm.

The nominal width of co p r layer may b 2,5 mm, 5 mm, 7,5 mm or 10 mm

The nominal thic nes an nominal width of a pl ed co p r layer s al b stated in the test

re ort

Metal p rts of the fu e-b se s al b made of bras with a co p r content b twe n 5 % an

7 % Contact p rts s al b si ver plated

The fu e-element s al b completely en losed

The f use-l n s s al b resistant to he t ac ordin to 9.7, an to fire ac ordin to

IEC 6 6 5-2-12 an IEC 6 6 5-2-13

IEC 6 6 5-4:2 12, 3.7

For f use b dies made of plastic material or of material containin organic s bstan es the

f ol owin minimum req irements a ply:

– Glow-wire ig ition temp rature (GWIT) = 7 5 °C

– Glow-wire flamma i ty in ex (GWFI) = 8 0 °C

NOT 1 Dime sio s f or th material plate f or th glow wire te ts are giv n in IEC 6 6 5-2- 2:2 10, 4.2 or in

IEC 6 6 5-2- 3:2 10, 4.2

NOT 2 For materials s c a gla s a d c ramic wh s GWIT a d GWFI are th u ht to b hig er th n 7 5 °C

a d re p ctiv ly 8 0 °C th glow-wire te ts d n t a ply

8.3 Fu e-l nk terminations

Repla eme t:

Subclau e 8.3 a ples only to fu e-ln s with wire termination

Fu e-ln contacts s al b made of non-cor odin material or of material s ita ly protected

again t cor osion, an s al b eff ectively f e f om flu or other non-con u tin s bstan e on

their outer s races

Nic el or si ver platin is de med to b adeq ate protection for bras en ca s.

The f use-l n termination s al b rel a ly at ac ed

The samples s al b immersed in water f or 2 h at a temp rature of b twe n 15 °C an

3 °C

Termination s al with tan the mec anical f orces l kely to b en ou tered d rin normal

u e With the f use-ln held in a fixed p sition, e c terminal in turn is s bjected at ambient

temp rature to the f orces laid down in this stan ard The test samples s al b eq al y divided

amon the sp cif i termination tests

Present test method s al b p rf ormed in ac ordan e with IEC 6 0 8-2-21

– F r the ten i e test (Ua

1, the f orce a pl ed s al b 10 N

– For the thru t test (Ua

2), the force a pl ed s al b 2 N

– For the b n in test (Ub), if a pl ca le, the force a pl ed s al b 5 N an the n mb r of

After the con lu ion of testin , the fu e-l n termination s al remain firmly atac ed an the

voltage dro s al not ex e d the maximum alowed value in stan ard s e t 1

Clau e 9 of IEC 6 12 -1:2 0 ap l es ex e t as fol ows

9.1 Volta e drop

Add ition, after Not e 2:

The u e of a hig imp dan e voltmeter is recommen ed f or me s rin the voltage dro The

voltage dro s al b me s red directly at the f use-l n termination or, where this is not

p s ible, in the immediate vicinity of the fu e b d

If the test b ard ac ordin to Fig re 1 or Fig re 2 is u ed, the voltage dro may b me s red

at the p ints marked with U

9.2 Time/c r e t c ara teristic

9.2.1 Time/cur e t c ara teristic at normal ambie t temperature

N) are

req ired to b sp cif ied Limit values t

1, t

3, t

4, t

5, t

6

7are o tional