IEC 62821 2 Edition 1 0 201 5 02 INTERNATIONAL STANDARD NORME INTERNATIONALE Electric cables – Halogen free, low smoke, thermoplastic insulated and sheathed cables of rated voltages up to and includin[.]
Trang 1Elect ric cables – Halogen- free, low smoke, t hermoplast ic insulat ed and sheat hed
cables of rat ed volt ages up t o and including 450/750 V –
Part 2: Test met hods
Câbles élect riques – Câbles à isolat ion et gaine t hermoplast ique sans halogène
à faible dégagement de fumée, de t ension assignée au plus égale à 450/750 V –
Part ie 2: Mét hodes d'essais
Trang 2THIS PUBLICATION IS COPYRIGHT PROTECTED
Copyr ight © 2 15 IEC, Ge e a, Switzer la d
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Trang 3Elect ric cables – Halogen- free, low smoke, t hermoplast ic insulat ed and sheat hed
cables of rat ed volt ages up t o and including 450/750 V –
Part 2: Test met hods
Câbles élect riques – Câbles à isolat ion et gaine t hermoplast ique sans halogène à
faible dégagement de fumée, de t ension assignée au plus égale à 45 /750 V –
Part ie 2: Mét hodes d'ess is
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 t en c te publc tion via u distribute r a ré
Trang 4FOREWORD 3
1 Sco e 5
2 Normative ref eren es 5
3 Terms an def i ition 5
4 General req irements 5
4.1 Pre-con itionin 5
4 2 Test temp rature
5 4.3 Test voltage 6
4.4 Test values 6
5 Test method 6
5.1 Electrical test method
6 5.1.1 L ng-term resistan e of in ulation to d.c voltage 6
5.1.2 Absen e of aults in in ulation 6
5.1.3 Sur ace resistan e of s e th 7
5.1.4 Voltage test on cores in water 8
5.2 Mec anical test method 8
5.2.1 Water immersion on s e th 8
5.3 Chemical test – Determination of halogen – Elemental test 9
5.3.1 WARNING 9
5.3.2 Eq ipment 9
5.3.3 Materials 9
5.3.4 Proced re 9
Trang 5INTERNATIONAL ELECTROTECHNICAL COMMISSION
_
INCLUDING 450/750 V –
Part 2: Test methods
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International Stan ard IEC 6 8 1-2 has b en pre ared by IEC tec nical commit e 2 :
Electric ca les
The text of this stan ard is b sed on the f ol owin doc ments:
Ful inf ormation on the votin f or the a proval of this stan ard can b foun 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
Trang 6A l st of al p rts in the IEC 6 8 1 series, publ s ed u der the general title, Ele tric c bles –
H al og n-fe , low smo e, thermo l ast ic insul ated a d sh athed c bl es ofrat ed v lt ag s u to
a d incl ud ing 450/7 50 V, can b f ou d on the IEC we site
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 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 publ cation wi b
• recon rmed,
• with rawn,
• re laced by a revised edition, or
Trang 7ELECTRIC CA BLES – HA LOGEN-FREE, LOW SMOKE, THERMOPLA STIC
INCLUDING 450/750 V –
Part 2: Test methods
This p rt of IEC 6 8 1 sp cifies test method whic are p rtic lar f or ca les with in ulation,
an s e th b sed on halogen-f re , thermo lastic comp u d, an havin low emis ion of
smoke an cor osive gases when exp sed to f ire, of rated voltages U
0/U up to an in lu in
4 0/7 0 V a.c
General req irements are sp cified in IEC 6 8 1-1 an p rtic lar typ s of f lexible ca les are
sp cified in IEC 6 8 1-3
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 referen 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 81 -5 1, Ele tric a d o t ic l fibre c bl es – Test met hods for n n-met al lic materials –
P art 501: Mec a ic l t ests – Tests for d et ermining t he me h nic l pro ert ies of insul ating a d
sh athing c mp u ds
IEC 6 2 0, Ele tric c bl es – Sp rk- est met hod
IEC 6 8 1-1, El ectric c bles – Hal og n-fe low smok e, t hermo lastic insulated a d sh at hed
c bl es ofrated voltag s u t o a d incl ud in 450/7 50 V – Part 1: Ge eral re uireme ts
IEC 6 8 1-3, Ele tric c bles – Halo e -fe l ow smoke t hermo l astic insulated a d sh at hed
c bles ofrat ed v lt ag u to a d includ ing 450/7 50 V – P art 3: F lex ibl e c bl es (c rds)
3 Terms and def initions
For the purp ses of this doc ment, the terms an def i ition given in IEC 6 8 1-1 a ply
Trang 84.3 Te t volta e
Unles otherwise sp cif ied in the in ivid al clau e of this stan ard or in the prod ct stan ard,
the test voltage s al b a.c of a proximately sine wave f orm an of f req en y b twe n
4 Hz an 61 Hz The ratio of p ak value to r.m.s value s al b eq al to √ with a toleran e
of ± %
The values q oted are r.m.s values
4.4 Te t v lue
Ful test con ition (s c as temp ratures, d ration , etc.) an ful test req irements are not
sp cified in this stan ard It is inten ed that they s ould b sp cified by the stan ard de l n
with the relevant typ of ca le
An test req irements whic are given in this stan ard may b modified by the relevant ca le
stan ard to s it the ne d of a p rtic lar typ of ca le
5 Test methods
5.1 Ele tric l te t methods
5.1.1 Lon - erm re ista ce of ins lation to d.c volta e
5.1.1.1 Te t s mple
Car y out the test on a sample of ca le of 5 m len th f rom whic al coverin s have b en
removed The cores of lat u s e thed cord s al not b se arated
For ca les havin up to f i e cores, e c core s al b tested For multicore ca les havin
more than five cores, one core of e c colour in the ca le s al b tested, an where the
n mb r of colours is les than 5, d pl cate coloured cores s al b tested as neces ary to
brin the n mb r of cores tested up to a minimum of 5
Take care to avoid damage to the core(s) d rin removal of the coverin s
5.1.1.2 Proc d re
Immerse the sample, f or the p riod an at the temp rature given in the relevant ca le
stan ard, in an aq e u solution of sodium c loride havin a con entration of 10 g/l, with a
len th of a out 2 0 mm at e c en of the sample projectin a ove the solution Connect the
negative p le of a 2 0 V d.c s p ly to the con u tor(s) of the sample an the p sitive p le to
a co p r electrode immersed in the solution for the time given in the relevant ca le stan ard
Test al the ca le that is in the f i al stage of man facture, whether it is in del very len th or
in man f acturin len th prior to b in c t into del very len th
Trang 9Test sin le core ca les, whether s e thed or u s e thed, by the sp rk test in ac ordan e
with 5.1.2.2 Test al other ca les, in lu in s e thed flat ca les, with the voltage test in
ac ordan e with 5.1.2.3
The req irements of 4.1 of this stan ard do not a ply when the c ec for a sen e of faults is
car ied out as a routine (R) test
5.1.2.2 Spark te t
5.1.2.2.1 Proc dure
Car y out the test ac ordin to IEC 6 2 0, ex e t that the o tion to u e a pulsed waveform
hig -voltage source is not p rmited
5.1.2.2.2 Re uireme t
No faults s al b detected d rin the test
5.1.2.3 Voltag te t
5.1.2.3.1 Proc dure
With the ca le in the dry state an at ambient temp rature a ply a voltage of the mag itu e
given in the relevant ca le stan ard, s p l ed either f rom an a.c source or f rom a d.c source,
b twe n e c con u tor an al the other con u tors an , if an , the metal c layer con ected
to e rth
In re se the voltage grad al y an maintain it at the ful value for the d ration given in the
relevant ca le stan ard
Cle n the s e th of e c of the samples with in u trial meth lated spirit an a ply to e c
sample two electrodes, con istin of wire hel ces of co p r wire of b twe n 0,2 mm an
0,6 mm diameter, at a distan e of (10 ± 2) mm f rom e c other Af ter the wire has b en
a pl ed, cle n the s r ace of the s e th again thorou hly b twe n the electrodes
Con ition the samples with electrodes at ac ed in a con itionin c amb r at a temp rature of
(2 ± 2) °C an a relative h midity of (6 ± 5) % f or 2 h
Immediately after removal fom the con itionin c amb r, a ply a d.c voltage of b twe n
10 V an 50 V b twe n the electrodes, an me s re the resistan e after 1 min
Multiply the me s red resistan e of e c sample, in ohms, by a/10 , where a is the
circ mferen e of the s e th of the sample, in mi imetres Record the median of the thre
values so o tained as the s race resistan e of the s e th
Trang 10Pre are a sample of ca le 5 m lon , by careful y removin , without damagin the cores, the
s e th or the overal braid an an other coverin or fi in f om a len th of completed ca le
In the case of f lat u s e thed cord, make a c t in the in ulation b twe n the cores an
se arate the cores by han over a len th of 2 m
5.1.4.3 Proc d re
Immerse the sample in water at the temp rature, an for the p riod, sp cified in the ca le
stan ard En ure that the en s of the cores protru e a ove the water by a distan e s f ficient
to prevent ex es ive s race le kage when the test voltage is a pl ed Ap ly a voltage, of the
mag itu e sp cified in the ca le stan ard b twe n the con u tors an the water for the time
This test is to demon trate the ef fect of water on the mec anical pro erties of s e th by
determinin the ten i e stren th an elongation at bre k of the s e thin materials in the
u con itioned state as man f actured an in the con itioned state after immersion in water
The ten i e tests on the con itioned an u con itioned test pieces s al b made in
immediate s c es ion
5.2.1.2 Sampl ng a d preparation of te t pie e
Pre are test pieces in ac ordan e with the proced re des rib d in IEC 6 81 -5 1
The cros -sectional are of the sample s al b determined b fore immersion in water
5.2.1.3 Proc dure
Immerse the d mb-b l test pieces in de-ionized water f or the time an at the temp rature
given in the relevant stan ard for the ca le s e thin material Fol owin this immersion,
al ow the test pieces to co l to a temp rature of (2 ± 5) °C b fore removin them fom the
water Dry the test pieces with a sorb nt p p r an within 6 min of dryin me s re b th the
ten ie stren th an the elon ation at bre k in ac ordan e with the proced re des rib d in
IEC 6 81 -5 1
Trang 11Place 2 0 mg – 2 0 mg of the sample into the b tom of a smal soda glas test tub Ad
10 ml of disti ed/de-ionized water to the eva oratin b sin an place this in the f ume
c p o rd b hin the safety s re n Whi st holdin the test tub f irmly with the test tub holder
at an an le of 4 ° – 6 ° to the vertical, introd ce a piece of f es ly c t, cle n sodium (a out
the size of a smal p a) (2 0 mg – 2 0 mg) into the mouth of the test tub without al owin it
to come into contact with the sample With the safety s re n in place, gently he t the sodium
u ti it melts an ru s down on to the sample ( here may b a vigorou re ction when the
molten sodium re c es the sample if halogen are present He t the tub gently for a out
1 min, then more stron ly u ti the lower 2 mm of the tub glows red hot Plu ge the red hot
tube into the water in the eva oratin b sin, immediately placin the gau e on to (The
gau e prevents an los of material when the tub s at ers on contact with the water.) Al ow
an u re cted sodium to re ct b fore grin in up the solution an glas Fi ter an se arate
the fi trate into two eq al p rtion
5.3.4.2 Ide tific tion of the pre e c of c lorine a d/or bromin
To the f irst p rtion of the fitrate, ad s ff i ient nitric acid to make the solution acidic Boi this
solution u ti its total volume has b en red ced by half ( his is to remove an HCN or H2S, if
present, whic would inter ere with the test Ad 1 ml si ver nitrate solution
Trang 12A white or yel owis -white precipitate in icates the presen e of halogen (Cl, Br) in the original
sample (If the l q or is decanted, an the precipitate is white an re di y soluble in di ute
ammonia, then c loride is present.)
5.3.4.3 Id ntific tion of the pre e c of fluorine
To the secon p rtion of the fi trate, acidify with glacial acetic acid Boi this solution u ti its
total volume has b en red ced by half Ad 2 to 3 dro s of f res ly pre ared zirconium lake
re gent (eq al volumes o
a) alzarin solution: 0,0 g Al zarin red-S in 5 ml disti ed water;
b) zirconium solution: 0,0 g zirconium nitrate in 10 ml con entrated HCl di uted with 5 ml
disti ed water)
He t at 4 °C f or 1h
The presen e of fluoride is in icated by the red/pin colouration b in ble c ed to yel ow