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Whereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities, in order to promote transparency and accountability in the working of every public authority, and whereas the attached publication of the Bureau of Indian Standards is of particular interest to the public, particularly disadvantaged communities and those engaged in the pursuit of education and knowledge, the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public.

इंटरनेट मानक

“!ान $ एक न' भारत का +नम-ण”Satyanarayan Gangaram Pitroda

“Invent a New India Using Knowledge”

“प0रा1 को छोड न' 5 तरफ”Jawaharlal Nehru

“Step Out From the Old to the New”

“जान1 का अ+धकार, जी1 का अ+धकार”Mazdoor Kisan Shakti Sangathan

“The Right to Information, The Right to Live”

“!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता है”Bhartṛhari—Nītiśatakam

“Knowledge is such a treasure which cannot be stolen”

“Invent a New India Using Knowledge”

है”ह”ह

IS 9335-3-2 (1985): Cellulosic papers for electricalpurposes, Part 3: Specifications for individual materials,Section 2: Capacitor paper [ETD 2: Solid ElectricalInsulating Materials and Insulation Systems]

IS : 9335 ( Part 3/Set 2 ) - 1985

Indian Standard

SPECIFICATION FOR CELLULOSIC PAPERS FOR ELECTRICAL PURPOSES

PART 3 SPECIFICATIONS FOR INDIVIDUAL MATERIALS

Section 2 Capacitor Paper

Solid Electrical Insulating Materials Sectional Committee, ETDC 63

Chairman

SERI A. S. LAESHIKANAN

Members

Representing

Senapathy Whitelay Ltd, Bangalore

SHRI B. A. GOVINDARAJ ( Alternate to Shri A. S. Lakshmanan )

SHRI S. B. BAPAT Dr Beck & Co ( India ) Ltd, Pune SHR~ R. S. LAAD ( Alternate )

DR M. V. DALAL Bharat Heavy Electricals Ltd, Hyderabad SHRI B. SUDARSHAN ( Alternate I ) SHRI C. L. NAILAYANA ( Alternate II )

SARI S. M. DASTUR Fibre-Glass Pilkington Ltd, Bombay SHRI R. K. A~~~wAL ( Alternate )

SHRI V. B. DESAI Jyoti Ltd, Vadodara SRRI B. G. Su~rzxaa ( Alternate )

DIRE~T~I~ Central Power Research Institute, Bangalore SHRI K. S. ARUNACEALA

SASTRY ( Alternate ) DIRECTOR ( HTD-VIII ) Central Electricity Authority, New Delhi

DIREOTOR ( TED ) ( Alterrrate ) SHRI P. N. HIRIYANNAIAH Kirloskar Electric Co Ltd, Bangalore

SHRI G. Usr~sa ( Altertrate ) JOINT DIREOTOR S T A N D A R D s

ELECTRICAL/Q Research? Designs and Standards Organization,

Minlstry of Railways, Lucknow DEPUTY DIRECTOR STANDARDS

ELECTRICAL/B-~ ( Alternate ) SHRI R. D. KAWATRA Directorate General of Technical Development,

New Delhi SHRI B. MUKHOPADHYAY-A National Test House, Calcutta

SHRI P. C. PRADHA’N ( Alternate)

(Continued on page ‘2 )

@ZJ Copyright 1986

INDIAN STANDARDS INSTITUTION

This publication is protected under the Indian Copyri,oht Act ( XIV of 1957) and reproduction in whole or in part by any means except with written permission of the

publisher shall be deemed to be an infringement of copyright under the said Act.

IS : 9335 ( Part 3/Set 2 ) - 1985

( Continuedfrompagc 1 )

Members Representing

DR M. S. NAIDU Indian Institute of Science, Bangalore PROB V. PRABHASHANKER (Alternate )

LT-COL A. R. NAMBIAR Ministry of Defence ( DGI ), New Delhi MAJ K. S. SETHI ( Alternate )

SHRI R. V. NARAYANAN Directorate General of Supplies and Disposals, New Delhi

DR M. S. PADBIDRI Hindustan Brown Boveri Ltd, Bombay SHRI S. R. POTNIS ( Alternate )

SHRI S. W. PATWARDHAN The Bombay Burmah Trading Corporation Ltd ( Formica India Division ), Pune

SHRI V. K. HIN~NE ( Alternate ) DR G. M. PHADKE Indian Electrical Manufacturers’ Association,

Bombav SHRI K. K. GOSAIN (Alternate)

SHRI N. A. PURUSHOTHAMA IYER NGEP Ltd, Bangalore SHRI ASWATHANARAYANA ( Alternate )

SHRI D. S. SAHNEY Sahney Kirkwood Pvt Ltd, Thane SHRI K. S. KAPOOR ( Alternate )

SHRI C. C. SAKARDA Permali Wallace Ltd. Bhopal DR L. C. ANAND ( Alternate )

SHRI S. S. SEARMA Jhaveri Thanawala Corporation, Bombay SHRI K. T. THANAWALA ( A6ternate )

DR J. VAID Peico Electronics & Electricals Ltd, Bombay DR S. P. BHIDE ( Alternate )

SHRI S. K. VERMA Caprihans India Ltd, Bombay SHRI K. K. A. RAO (Alternate)

SHRI Y. S. VENKATESWARAN Lakshmanan Isola Ltd, Ramanagaram SHRI S. P. SAO~DEV, Director General, ISI ( Ex-ojitio Member )

Director ( Elec tech )

Sccretq

SHRI V. DEWAN Deputy Director ( Elec tech ), IS1

IS : 9335 ( Part 3/Set 2 )- 1985

Indian Standard

SPECIFICATION FOR CELLULOSIC PAPERS FOR ELECTRICAL PURPOSES

PART 3 SPECIFICATIONS FOR INDIVIDUAL MATERIALS

Section 2 Capacitor Paper

0. FOREWORD

0.1 This Indian Standard ( Part 3/Set 2 ) was adopted by the Indian Standards Institution on 5 February 1985, after the draft finalized by the Solid Electrical Insulating Materials Sectional Committee had been appro- ved by the Electrotechnical Division Council.

0.2 This standard ( Part S/Set 2 ) is one of the series of Imiian Standards which deal with cellulosic papers for electrical purposes. This series have the following three party:

Part 1 Definitions and genera1 requirements;

Part 2 Methods of test; and

Part 3 Specification for individual materials in the following five sections covering different cellulosic papers:

Section 1 General purpose electrical paper, Section 2 Capacitor paper, Section 3 Crepe paper, Section 4 Electrolytic capacitor paper, and Section 5 Special paper.

0.3 In preparation of this standard assistance has been derived from IEC Publication 554-3-2 ‘ Specification for cellulosic papers for electrical purpo- ses, Part 3 Specifications for individual materials, Sheet 2 Capacitor paper’, issued by International Electrotechnical Commission.

0.4 For the purpose of deciding whether a particular requirement of this standard is complied with, the final value, observed or calculated, express- ing the result of a test or analysis, shall be rounded off in accordance with IS : 2-1960*. The number of significant places retained in the rounded off

value should be the same as that of the specified value in this standard.

*Rules for rounding off numerical values ( revised ).

3

IS I 9335 ( Part 3/Set 2 ) - 1985

1. SCOPE

1.1 This standard ( Part 3/Set 2 ) covers the requirements of capacitor kraft paper.

2. TERMINOLOGY

2.1 For the purpose of this standard, the definitions given in IS : 9335 ( Part 1 )-1979* shall apply.

3. TYPES

3.1 The capacitor kraft papers are classified in four types:

a) Type 2.1 kraft capacitor paper,

b) Type 2.2 kraft capacitor paper, high reliability,

c) Type 2.3 kraft capacitor paper, low loss, and

d) Type 2.4 kraft capacitor paper, high reliability, low loss.

4. GENERAL REQUIREMENTS

4.1 The material shall conform to requirement stated in IS : 9335 ( Part 1 )- 1979*.

5. PERFORMANCE REQUIREMENT

5.1 When tested according to relevant method described in IS : 9335 ( Part 2 )-198lt. The material shall conform to the requirements given in Table 1.

*Specification for cellulosic papers for electrical purposes: Part 1 Definitions and general requirements.

PSpecification for cellulosic papers for electrical purposes: Part 2 Methods of test.

TABLE 1 REQUIREMENTS FOR CAPACITOR PAPER

( Clazrse 5.1 )

SL PROPERTY METHOD TYPE UNIT REQUIREMENTS REMARKS No. OF TEST

REFTO CL No.OF IS:9335- (PARTY) 1981*

r___-_*--_ ---~

Nominal Tolerances Thick- T----~--T

ness Nominal Nominal ama- aw=- rent rent

density density g/cm” below

0.90 and 0’90

(1) (2)

i) Thickness

(3)

3

ii) Apparent den- 5 sity

(4) (5) (6)

over *%

(7)

All ;Lm <6 10 >6to<8 8

>8 7

(9)

‘ill g/cm3 The apparent density shall not depart from the no- minal value than 0.05 g/cm*

by more

*Specification for cellulosic papers for electrical purposes: Part 2 Methods of test. tMethods of sampling and test for paper and allied products: Part 1 ( revised ).

( Continued )

vi) /IH of aqueous 14 All extract

vii) Conductivity 13 All of aqueous extract

viii) Chloride con- 15 All tent of aque- ous extract

ix) Electric stren- 22 (b) 2’1 gth dc [Ref Amen-

dment No. 1 to IS : 9335

( Part 2 ) 1981*]

2.2

2.3

2.4

mS/m 3’0 Max

mdkg

kV/mm Nominal densitv gjcmr

0’8 1’0 1’1 1’2

b 1’3

kV/mm Nominal density gicms

1’0

2 :*3’ kV/mm Nominal

density g/cm8

0-a ;:;

kV/mm Nominal density g/cm3

0.8 1’0 1’17

6-O IO 8.0

5.0 Maw

Lowest value ( Min )

20 30 35

2;

Central 20121 value value (Min) (Min)

85 a0 110 IO0 125 115

Lowest value ( Min )

20 30 40

Central 20/21 value value

(Min) (Min) 55

1:: 100 ;8

110 105 125 115

*Specification for cellulosic papers for electrical purposes: Part 2 Methods of test.

For types 2.1 and 2.3, nine tests shall be made and no individual reading shall be lower than the value shown

For types 2’2 and 2’4, twenty-one tests shall be made and not more than one reading shall be below the 20/21 value shown

cc

TABLE 1 REQUIREMENTS FOR CAPACITOR PAPER - Contd

SL. PROPERTY METHOD TYPE UNIT REQUIRE.MENTS REMARKS No. OB TEST, ~-_---h_-~~~

REF TO Nominal Maximum Dissipation CL No. OF Density IS : 9335- alcms

( PART 2 ) 1981*

Factor of Impreg- nated Paper at “C

r__--h_--~ 25 50 80 100 120

(1) (2) (3) (4) (5) (6)

x) Dissipation - 2.1 1 x lo-4 0’8 factor 1’0 ( Impreg- 1’1 nated )

>:*:

2’2 1x10-4 1.0

>:.:

(7) (8) (9! (10) (11) (12)

30 26 26 27 35 ii 30 32 39 33 33 35 42 36 36 38 46 39 39 41

35 30 30 32 38 42 36 36 38 45 46 39 39 41 49

2’3 lx 10-4 0.8 24 21 21 21 1.0 29 26 26 26 1’2 36 31 31 31

2’4 1 x IO-4 0’8

:::7

24 21 21 21 29 26 26 26 35 31 30 30 36 32 31 31 42 33 33 35

32 38

:: 49

24

z

24

ii 35 40

Model capacitors are to be used, impregnated with the material to be used in practice and avoiding all contamination

Values are given for trichlordi- phenyl. Values using other im- pregnants should be agreed bet- ween the purchaser and the supplier

Measurements to be made at 15 kV/mm

The capacitors of nominal capacity 2 f 0.5 PF are to be wound using aluminium foil of capacitor manu- facturing quality ( oil free ) of width about 40 mm, the edge margin being at least 5 mm. The winding is to be on a 10 mm dia- meter removable core with ten complete turns of paper before the winding in of the foils

Connection wll be made by two tabs of soft tin foil per electrode al l/4 and 3/a of the winding length

‘9

xi) Conduct- 2.1 m-s ing ( z:thod paths 2)

Maximum Count Per ma ~__~~_~~h~__~~~~ Nominal Nominal density thickness g/cm’

r-_-__h_--_-~ pm 0.8 1.0 1.1 1.17 1’2,1’3

5 200 6 160 7 110

5’5 90 8 23 49 76 105 9 22 38 57 76

>lO::<l2 6 :: :: 2”: ::

>12to415 4 5 8 >15to<l8 2 3 4 l3 :: 6 >RIto425 l 2 3 5 7

l 12 43 55

2.2 m-s l”o 7

>lO to Gl2 : >12 to <I5 3 >15to<18 2 >18 to G25

2’3 m-2 10 6 14

28 37

17 27 8 18

10 : 6

40

The approximate number .of turns required will be ( inclusive of the initial 10)

Thickness Density, g/cma

um ( 0’8 1’0 1’2 ---

8 154 152 159 10 170 168 ( / 166 12 183 181 i 179 15 196 194 / 192 18 207 205 203

NOTE l - If the number of faults found in the first square metre tes- ted exceeds the maximum permissi- ble value, but does not exceed 6, the test IS repeated until one of the following conditions is fulfilled:

a) The average number of faults per square metre be- comes less than the maxi- mum permissible value,

b) Six faults are counted

Only in case (b) shall the material be rejectable

NOTE 2 - Values for other no- minal densities shall be established by linear interpolation

( Continued )

TABLE 1 REQUIREMENTS FOR CAPACITOR PAPER - Contd

l%. PROPERTY METEOD TYPE UNIT REQUIREBXENTS REMARKS

OB TEST, ~---_-_---h----__~ REB TO Nominal Maximum Dissipation

CL No. OB Density IS : 9335- glcms

Factor of Impreg- nated Paper at “C

( PART 2 ) C_--_-_h-_-__~ 1931* 25 50 80 100 120

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) (12) >I0 to <12 4 10 29 NOTE 3 - These limits refer to >12 to<15 2 5 13 counts made with measuring equip- >15to<18 1 3 6 ment in accordance with 24

>18 to <25 1 2 5 ( Method 2 ) of IS : 9335 ( Part 2 ) 1981*. The use of other measuring-

2.4 m-s 8 16 32 38 55 equipment should be subject to 9 16 agreement between the purchaser

10 5 8 14 21 38 and the supplier

>10to912 3 5 10 15 27

>12toq15 2 4 7 10 18

>15 to%18 1 3 5 6 10 >18to<25 1 2 4 5 6

REQUIREBXENTS ~~_~~~h~-----~~

Maximum Count Per ma r------- “-----_--~

Nominal Apparent Apparent thickness density 1.0 density 1.0

r_*_T c-&-7

pm 1ov 4ov 10 v 4ov 24 2.1 m--2 8 75 2 500 120 700 NOTE 1 If the fault count in -

(Method 9 60 1 450 80 400 the first ma tested is than the value but greater less than 6,

45 980 60 230 permitted

3) 10 further equal area shall be tested >lOto<12 35 300 20 70 until either:

>12 to<15 8 40 12 30

Maximum Count Per ma C__---_-h-----,~ Nominal Apparent density 1’17 thickness r-_-_*-__-~

tJm 1OV 4ov 1oov

2.4 m-s 9 70 90 850 a) the average count per ma 10 47 55 215 falls the below permitted

value, or 12 23 16 70 (b) 6 faults have been counted. 15 10 10 20 Only in case (b) shall the material

be rejectable

NOTE 2 - The choice of voltage shall be subject to agreement bet- ween the purchaser and the supp- lier.

NOTE 3 -Values for other no- minal densities shall be established by linear interpolation.

INTERNATIONAL SYSTEM OF UNITS ( SI UNITS)

Base Units

QU”Mify

Length Mass

Time Electric current Thermodynamic

temperature Luminous intensity Amount of substance

Supplementary Units

Qoanf ity

Plane angle

Solid angle

Derived Units

Quantity

Force Energy

Power Flux Flux density Frequency Electric conductance Electromotive force Pressure, stress

Unif

metre kilogram second

ampere

kelvin

candela

mole

Unit

radian

steradian

Unif

newton

joule

watt weber

tesla

hertz

siemens

volt

Pascal

Symbol

m

kg

: K

cd mol

Symbol

rad sr

Symbol

N

W

Wb T

HZ S V

Pa

Defhition

t N = 1 kg.m/ss 1 J = 1 N.m

1 w = 1 J/s 1 Wb = 1 V.s 1 T = 1 Wb/ma 1 Hz = 1 c/s (s- ‘) 1 S = 1 A/V 1 V=lW/A 1 Pa - 1 N/m”