Is 5831 1984 PDF [PDF]

Zitiervorschau

Indian Standard

( Reaffirmed 2001 )

SPECIFICATION FOR PVC INSULATION AND SHEATH OF ELECTRIC CABLES (

First Revision )

Fourth Reprint JANUARY 1998

UDC 621.315.221.8:621.315.616.96[678.743.22]

B U R E A U QP I N D I A N BTANDARDI MANAlL EHAVAN, 9 BAHADUR SHAH ZAPAR INAltONEW DELHI 110002

s#pmbn 1984

IS : 5831.1984

Indian Standard SPECIFICATION FOR PVC INSULATION AND SHEATH OF ELECTRIC CABLES

( First Revisiop ) Power Cables Sectional Committee, ETDC 59 Chairman

SEIRI M. L. DON~RE

M-3, Satyam, 88, Sion Circle, Bombay Represent&g Bharat Heavy Electricals Ltd, Hyderabad

Members SHRI J. P. ANAL S HRI B. P. RAI ( Alternate) S HRI M. R. BEAT SHRI D. K. BASU ( Alternate ) CHIEF ENGINEER ( EL E C T R I C A L ) I WORKS S URVEYOR o F ( ELECT ) V ( Alternate ) D R K. DAS G U P T A

Tata Consulting Engineers, Bombay Central Public Works Department, New Delhi Calcutta Electric Supply Corporation ( India ) Ltd, Calcutta

S HRI P. NEOQI ( Alternate ) Central Power Research Institute, Bangalore D IRECTOR S HRI M. C. RATRA (Alternate ) S AFETY Directorate General of Mines Safety, Dhanbad D IRECTOR OR M I N E S ( ELECT ) ( HQ ) D IRECTOR OF, MINES SAFZTY ( ELECT ) ( Alternate ) Cable and Conductor Manufacturers’ Association S HRI R AVI K. DU T T of India, New Delhi SHRI S. R. SARAN ( Alternate ) Indian Cable Co Ltd, Jamshedpur SIIRI P. Grrosu SHRI K. V. R. Rao ( Alternate ) Cable Corporation of India Ltd, Bombay SHRI M. M. H~NAVAR \ SIIRI S. R. PAUMAN~BHAN ( Alternate J Directorate of Technical Development & ProducSI~I D. K. J AIN tion ( Air ), New Delhi SIII~I V. K. Snanaa~ ( Alternate ) Bombay Suburban Electric Supply Ltd, Bombay SIII 12.5 IllIn )

a) Test t?mpt’rature ( tole-

“C

- 5

b) Visual examination

-

No signs of cracks or scales

r a n c e f 2%

)

- 5

- 5

( Continued ) 6

Isr5831-1984 TABLE

1 TEST REQUIREMENTS FOR PVC INSULATION - Contd TEST

(2)

(1) xi) xii)

T YPE OB INSULATION C__-h--7 C B A

U NIT

(8)

Colour fastness to daylight exposure, Mitt Colour fastness to water C Tempera1 ture ( tolea) Treatment{ rance

(4) 4

rating

“C

70

(Duration hours b) Visual examination xiii) Thermal stability “C a) Test temperature ( tolerance * 0’5OC ) minutes b) Time, Min xiv) Bleeding and blooming test ( Tempera“C ( ture ( tolea) Treatment{ rance I f 2°C) 1 Duration hours b) Observation Water absorption test ( gravimetric ) f TemperaI t u r e ( totea) Treatment {’ rance’

I l PC 1 1 Duration

b) Water absorbed, Max

(8) 4

( I~C Note 3 )

I f 2OC)

xv)

(5) 4

METHOD OB TEST ( REP TO P ART No. OF IS : 10810* ) (7) 18

70

70

48 48 48 fret from traces of colour ( w Note 4 ) 200

200

200

80

100

100

50

50

50

19

72 72 72 no appreciable staining of indicator compound or filter paper 33

*Cl

85

days mg/cms

-

14 10

-

-

NOTE 1 - V o l u m e resis_tivity and insulation resiattnce tests mpy be done at room temperature instead oi 27°C. However, in case of doubt or disputr, the test results shall bc confirmed by testing at 27°C. N OTE 2 - Time under load: First case- Cab1t.s having a rated voltage not exceeding 3*3/3*3’3 kV and a wnductor cross-section notexceeding 35 mm*. Second cate-Cables not covered under first case. Now 3 - Undrr preparation. In the meantime, test method given in Appendix A shall be folloued. Norr~ 4 - Under p r e p a r a t i o n . I n t h e m e a n t i m e , t e s t m e t h o d s g i v e n i n Appendix U shall be followed. *Methods of tryst for cables.

7

1s : 5831 - 1984 TAELE 2

TEST REQUIREMENTS FOR PVC SHEATH

( Clause 4.1 TEST

T YPE OB SH E A T H _--h-_--, ST2 ’ ST1

UNIT

l%.

(1)

(2)

(3)

(4)

(5)

N/mm% percent

12’5 150

12’5 150

“C

80

100

days

7

7

N/mm*

12.5

12.5

percent

f 20

f 25

percent

150

150

percent

z!z 20

f 25

“C

80

100

days mg/cma

7 2

7 2

“C

80

30

hours hours percenl

: 50

ti 6 50

i) Without ageing a) Tensile strength, Min b) Elongation at break, Min

11

Min 2) Variation, Max iii)

10

Loss of mass in air oven (TemperaI ture ( tolea) Treatment{ rance I f 2°C) (Duration b) Loss of mass, MUX

15

iv) Hot deformation test a) Test temperature ( tolerance l 2°C ) b) Time under load ( see Note 1 ) First case Second case c) Depth of indentation, Max

(6) 7

ii) After ageing in air oven r Temperature ( tolea) Treatment .! rance i f 2oc) 1Duration b) Tensile strength 1) Value after ageing, Min 2) Variation, Max c) Elongation at break 1) Value after ageing,

hhWHODOB TEST (REP PART No. or IS: 10810* )

( Confinucd ) 8

fSr5831-1984 TABLE 2 SL No.

(1)

TEST REQUIREMENTS FOR PVC SHEATH - Confd

TEST

(2)

U NIT

TYPEOFSHEATH _-h_l-y ‘ST1 ST2

(3)

(4)

“C

150

150

1

1

(5)

v) Heat shock test (TemperaI ture f tolea) Treatment{ ran& I * 2°C ) 1Duration b) Visual examination

hour -

150

150

minutes

15

15

b) Shrinkage, M UX

percent

(6)

4

4 20

“C

- 15

- 15

No signs of cracks or scales

b) Visual examination

21 “C

- 5

b) Visual examination

-

ix) Colour fastness to daylight exposure, Min

rating

No signs of cracks or scales 4 4

- 5

18 ( See Note 2 )

x) Colour fastness to water f TemperaI ture ( tolea) Treatment{ rance i 2°C ) i, Duration b) Visual examination

OP

12 “C

viii) Cold impact test for diameter > 12.5 mm a) Test temperature ( tolerance * 2°C )

No.

No rigyc;racks or

CTempera1 ture ( tolea) Treatment{ rance I -f 2 ° C ) LDuration Cold bend test for diameter < 12’5 mm 1) Test temperature ( tolerance * 2°C’

PAR;

I S : 10810* ) 14

vi) Shrinkage test

vii)

M ETHOD OF T EST f REPTO

“C

hours -

70

70

48

48

Free from traces of colours ( Confinued )

9

ISr!5831- 1984 TABLE 2 TEST REQUIREMENTS FOR PVC SHEATH - Contd SL No.

TEST

U NIT

(1)

(2)

(3)

T YPE OF S HEATH ~---_*_-~~ ST1 ST2 (4)

(5)

( See Note 3)

xi) Thermal stahility a) Test temperature ( tolerance f 0’5%

M ETHOD OF T EST ( REP TO P ART No. O F IS : l;)lo* )

)

bj Time, Min

OC

200

200

minutes

40

80

“C

50

50

72

72

xii) Bleeding and blooming [Tempera/ ture \ ( tolea) Treatment{ rance

I f 2°C) 1 Duration

19

hours

appreciable No staining of indicator compound or filter pap&

b) Observations

-

xiii) Oxygen index

( Under consideration )

NOTE 1 - Time under load: First case-4 hours for test piece having an outer diameter not exceeding 12’5 mm. Second case--6 hours for test piece having an outer diameter exceeding 12’5 mm. NOTE 2 - Under preparation. In the meantime, test method given in Appendix A shall be followed. N OTE 3 - Under preparation. In the meantime, test method given in Appendix B shall be followed. *Methods of test for cables.

10

IS: !%831-1984

APPENDIX A [ Tuble 1, Item ( xii ) and Table 2, Item ( x ) ] TEST FOR COLOUR FASTNESS TO WATER A-l. A piece about 100 mm long of insulation or sheath is out into small

pieces and immersed for the specified period in about 10 times its own volume of distilled water maintained at the specified temperature. At the end of the period, the water shall be examined. It shall be free from any trace of colour.

APPENDIX B [ Table 1, Item ( xiii ) and Table 2, Item ( xi) ] THERMAL STABILITY TEST B-l. Testing Equipment El.1 Class tubes closed at one end 110 mm long with an outer diameter of approximately 5 mm and an inner diameter of 4.0 f 0.5 mm.

B-l.2 Universal indicating paper with a PH range of 1 to 10. B-1.3 Thermostatically controlled heating apparatus for the specified temperature. B-l.4 Thermometer calibrated in divisions of O*l”C. B-1.5 Stop-watch or a suitable time meter. B-2. Testing M e t h o d a) From the insulation of each core to be tested or from the sheath to be tested, three samples, each of 50 f 5 mg, shall be taken in the form of strip, if possible. For small thickness the sample may consist of two or more strips. Each sample shall be inserted into a glass tube as specified in B-1.1. The sample shall occupy the bottom of the tube and not project more than 30 mm above the bottom. b) A strip of dry universal indicating paper as specified in B-1.2, about 15 mm long and 3 mm wide, shall be inserted into the open end ( top ) of the glass tube so that the strip protrudes a b o u t 5 mm out of the tube and can be bent to keep it i n position. 11

k3 : 5831 - 1984 c) The glass tube shall be placed into the heating apparatus, as specified in B-1.3, which has already attained the test temperature specified. The glass tube shall be inserted. into the heating apparatus for a depth of 60 mm.

4

The time taken for the universal indicating paper to change colour from a pH value of 5 to a pH value of 3 shall be measured, or the test continued for the specified duration without the colour change occurring. The colour change point shall be considered to have been reached when the red colouring of the universal indicating paper characteristic of a @H value of 3 is just becoming visible. The universal indicating paper shall be renewed ( especially for long duration stabilities ) ‘towards the end of the expected test time every 5 to 10 min, so that the change point is better visible.

B-3. Evaluation B-3.1 The average value of the thermal stability times of the three samp les shall not be lower than the value specified in Table 1 or Table 2 as applicable.

12

BUREAU OF INDIAN STANDARDS Headqiarters: Manak Bhavan, 9 Bahadur Shah Zafar Marg, NEW DELHI 110002 Telephones: 323 0131, 323 3375,323 9402 Fax : 91 11 3234062,91 11 3239399,91 11 3239382 Telegrams : Manaksanstha (Common to all Offices) Central Laboratory: Telephone 8-77 00 32 Plot No. 2019, Site IV, Sahibabad Industrial Area, Sahibabad 201010 Regional Offices: Central : Manak Bhavan, 9 Bahadur Shah Zafar Marg, NEW DELHI 110002

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271085 309 65 28 222 39 71

Printed at Simco Printing Press, Delhi

AMENDMENT NO. 1

APRIL 1985

TO IS:5831 -1984 SPECIFICATION FOR PVC INSULATION AND SHEATH OF ELECTRIC CABLES

(First Revision) [Page 5, Table 1, SZ No,(v), itm (a)] - Insert the following after this iten:

‘(1)

(2)

b) Loss of mass,

(3)

m&cm2

(4)

(5)

2

(6)

-

(7)

-

I

MZX

[Page 6, Table I, SZ No, (vi), itm (b), first case, co1 (611 - Substitute '4' for '-'. [Page 7, Table 1, LZ No. (xv)]: a) - Substitute 'tolerance' for 'toterance'.

b) - Substitute 'absorbed' for 'absortd'. [Page 8, Table 2, 5'2 No.(iv), item(a), co2 (5)] abstitute '80' for '30°. ,kTge 11, clause A-l, line 1) - Substitute 'cut' fop

I0

(Page 11, clause B-1.1, 'line 1) - Substitute 'Glass' for 'Class'.

(ETDC 59) Printed a! Simco Printing Press, Delhi, India

AMENDMENT NO. 2

DECEMBER 1995.

IS 5831 I 1984 SPEC%CATlON FOR PVC SHEATH OF ELECTRIC CABLES

INSULAT ION A ND

( Puge 4, clmse I.2 ) -- Add the following matter between ‘Type C’ and ‘Type ST1 :

‘Type II General purpose insulation for maxiinum rated conduct o r temncruture 7 0 ’ C intended Tar flexible c a b l e s wit)1 up to and including R-3/3*3 kV.’ the I’ollowi~r~ new pata for Type S.1’3 sheath intended for use in flexible at maximum rated conductor tem-

‘_I..

I able 1 ( C’onriftued )

‘/

!

I /

,2) Variation, dfw u i r oven * Teniperaturc ( tolcrnnce f’ 2°C ) R) TMtdcnt 1 Ihr:iliori b) L o s s o f ntass. ,Ifax '

7) Losvotninss ’

.;

. I

’

( lolcrluce f 2X’ ) b\ Tinlr nnder land ( .le~’ Note 2 ) 1) Firal case 2) scconh CnFC

N/IIWP

?tiii) pcrccnl pcrccnf

c

Terr~pc~;~lurc tolerance f 2°C)

. . .

” ‘-b) Visual cxnniinnjiou

I’

tl3ys mg/cm*

,

EO 7 2

; 2:

bows

4

IloIlrs

65

“C how ___

I 50 J No signs ol cracks or scales

15 6

-15

No signs of cr.tckc 01 scnlcs C~~d,i~l~c~ test ( for dimueter

b) Visual cxaniinntiorr

.

.

,

0. c

-

No signs of’ cracks or SCillhJ

2

Illceding nrd tlloorlliIlg ICFI a)

‘I rcnlrncnt

J(

‘l’elnp I :1111rc Iolcr~lllcc f 7°C.)

1. I)ilt;llior~

!\(I

150

> 12‘5 111111 ) n) Test tcIIlpcrntlIlc ( IOICIilIlCC * 2°C)

xiv)

1,) Oh5rt \';,I itrr1

.’

x)

'l~llCllllill slcibilily

b) ‘l’irllc, 11fin “C,

Hear shock test r

f ~Icwpcrrlfltrr

{ ( ~olcl;~llrc + ?"f? ) I_ I)ur:tlion

b) Visual cxarriitwliofl

prrccnt

pcrccnt

C) Depth of lllde~~lilli()ll. hfo.r

..__

3) l'lr:llllI~rll

“(’

a) Test tcmpcr:il~~rc

vii)

-.-

xii)

Ch)3

in

I’

1lOt dCfOfIlh7tfdl ICSt

VI)

Tea,

RI No.

c 0 ,

( tnlcrawe f 2°C ) { Dur:ltion h) Trn*ilc strength I ) Valua ofltr~a~csit~g. Afln 1’ : 2) Variation. Ai8.r I!) Elongalion 1; blc;lk I) Vnluc alter nl:uinl~, AfIn

‘4

.._-- -... ._

(3)

IclllpcI;llurc

,‘* n) Trcnlmcnl

a-

1 ype of III~ullltlOll

Upi1 f!) ( I ) i v ) A f t e r agcinl in ait oven

‘I’nhle I ( Ch

-_

3) 'llc:l~rllclll

f T’mpernlule

i ( lotcInIlce + 3"