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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.

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“Invent a New India Using Knowledge”

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“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”

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“Knowledge is such a treasure which cannot be stolen”

“Invent a New India Using Knowledge”

है”ह”ह

IS 10242-3-11 (1986): Electrical installations in ships,Part 3: Equipment, Section 11: Insulating materials forshipboard power cables [ETD 20: Electrical Installation]

IS : 10242 (Part 3/Set 11) - 1986

Indian Standard SPECIFICATION FOR

ELECTRICAL INSTALLATIONS IN SHIPS PART 3 EQUIPMENT

Section 11 Insulating Materials for Shipboard Power Cables

Electrical Equipment and Installations in Ships Sectional Committee, ETDC 62

Chairman

SHRI H. K. TANEJA

Members

Representing

Indian Register of Shipping, Bombay

SHRI S. CHANDRA ( Alternate to Shri H. K. Taneja )

SHRI S. S. ANAND Directorate of Warships Projects ( DGI ), Ministry of Defence

SHRI H. P. SINGH ( Alternate ) SHRI C. R. BALASUBRAMANIAN The English Electric Co of India Ltd, Madras

SHRI K. VASUDEVAN ( Alternate ) SHRI S. N. BASSI Garden Reach Shipbuilders and Engineers

Ltd, Calcutta SHRI A. D. BHATTACHARYA ( Alternate >

CDR A. M. BHOOPATI Directorate of Electrical Engineering ( NHQ ), Ministry of Defence

CDR M. S. CHANDRASHEKHAR ( Alternate ) SHRI N. CHAWRABORTY Directorate General of Shipping, Bombay SHRI B.B. BADWAL ( Alternate ) DR L. R. CHARY The Shipping Corporation of India Ltd, Bombay

SHRI N. N. BAHADURI ( Alternate ) SHRI S. P. CHAUDHRY Delton Cable Industries Ltd, New Delhi

SHRI P. MUKUNDAN ( Alternate ) SHRI S. K. DATTA General Electric Co of India Ltd. Calcutta SHRI A. N. GHOSH Development Commissioner, Small Scale

Industries, New Delhi SHRI A. BANDYOPADHYAY ( Alternate )

SHRI L. GOPALAKRISHNAN Directorate General of Technical Development, New Delhi

( Continued on page 2 )

@ Copyright 1987

BUREAU OF INDIAN STANDARDS

This publication is protected under the Indian Copyright 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 : 10242 (Part f/Set 11) - 1986

( Continued from page 1 )

Membera

SHRI K. KISHORE

Representing

Directoto;rav of Marine Engineering Training,

SHRI D. K. SANYAL ( Alternate ) SHRI K. V. MANIUNATH Kirloskar Electric Co Ltd, Bangalore

SHRI CHANDIRAKUMAR ( Alternate ) SHRI R. Y. MASTER Larsen and Toubro Ltd, Bombay

SHRI SHYAM SUNDER ( Alternate ) SHRI M. A. N~~RUDDIN Siemens India Ltd, Bombay

SHRI SHRI R. JAIRAM ( Alternate ) M. M. OKA Crompton Greaves Ltd, Bombay

SHRI M. G. BHATT ( Alternate ) CDR S. S. PARMAR Directorate of Production and Inspection ( DGI ),

CDR VINOD KUMAR ( Alternate ) Ministry of Defence

SHRI H. D. PENDSE Mazagon Dock Ltd, Bombay SHRI B. D. POPAWALA ( Alternate )

DR B. R. RAGHUNATH Jyoti Ltd, Vadodara SHRI R. PALANI ( Alternate )

SHRI K. R. RAMACHANDRAN Bharat Heavy Electricals Ltd, Hyderabad SHRI S. C. BHARGAVA ( Alternate I ) DR S. K. GUPTA ( Alternate 11 )

SHRI K. V. K. RAO The Indian Cable Co Ltd, Jamshedpur SHRI S. BHATTACHARYA ( Alternate )

SHRI K. P. SARATHY NGEF Ltd, Bangalore SHRI JAVEED AHMBD ( Alternate )

SHRI P. J.C. SERENO Cochin Shipyard Ltd, Cochin SHRI A. K. MUKHERJEE ( Alternate )

SHRI B. J. D. SILVA The Scindia Steam Navigation Co Ltd, Bombay SHRI J. MANSUKHANI ( Alternate )

SHRI M. R. SRINIVASARAO Hindustan Shipyard Ltd, Vishakhapatnam SHRI P. S. P. RAO ( Alternate )

SHRI S. P. S~CHDEV, Director General, BIS ( Ex-officio Member ) Director ( Elec tech )

Secretary SHRI SUKH BIR SJNGH

Deputy Director ( Elec tech I, BIS

( Cotttittued on page 9 )

2

IS : 10242 (Part 3/Set 11) - 1986

Indian Standard SPECIFICATION FOR

ELECTRICAL INSTALLATIONS IN SHIPS PART 3 EQUIPMENT

Section 11 Insulating Materials for Shipboard Power Cables

0. FOREWORD

0.1 This Indian Standard ( Part 3/Set 11 ) was adopted by the Indian Standards Institution on 10 February 1986, after the draft finalized by the Electrical Equipment and Installations in Ships Sectional Committee had been approved by the Electrotechnical Division Council.

0.2 This standard ( Part 3/Set 11 ) is one among the series of Indian Standards on electrical installations in ships. This series consists of the following parts:

Part I General Part 2 System design Part 3 Equipment Part 4 Installation and test of completed installation Part 5 Special features

0.3 In Part 3, for ease in reference, Sections 10 to 19 have been reserved for low and medium voltage power cables while Sections 20 to 29 would deal with telecommunication cables for use in ships.

0.4 This standard ( Part 3/Set 11 ) deals with the requirements for insulating materials for shipboard cables for low voltage power systems. Other sections dealing with the low voltage power cables are as follows:

Part 3/Set 10 Low voltage cables for power systems: Section 10 General construction and test requirements for low voltage shipboard power cables ( under preparation )

Part 3/Set 12 Choice and installation of cables for low voltage power systems

0.5 In this standard, for details of test methods, reference has been made to appropriate parts of IS : 10810-1984*, which is, therefore, a neces- sary adjunct to this standard.

*Methods of test for cables.

3

IS : 10242 (Part S/Set 11) - 1986

0.6 In the preparation of this standard, assistance has been taken from IEC Pub 92-351 ( 1983 ) ‘Electrical installations in ships : Part 351 Insulating materials for shipboard power cables’, issued by the Inter- national Electrotechnical Commission ( IEC 1.

0.7 For the purpose of deciding whether a particular requirement of this standard is complied with, the final value, observed or calculated, expressing the result of a test, shall be rounded off in accordance with IS : Z-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.

1. SCOPE

1.1 This standard ( Part 3/Set 11 1 specifies the test requirements for electrical, mechanical and particular characteristics of insulating mate- rials intended to be used in shipboard power cables.

2. INSULATING MATERIALS

2.1 General - The types of insulating compound covered by this standard are listed in Table 1 together with abbreviated designation, operating and short-circuit maximum rated conductor temperatures.

TABLE 1 TYPES OF INSULATING COMPOUND

SL TYPE OF INSULATING ABBREVIATED NO. COMPOUND DESIGNATION

(1) (2) * 1. Thermoplastic:

(3)

- based upon polyvinyl chloride or PVC/A copolymer of vinyl chloride and vinyl acetate

2. Heat resistant PVC PVC/C 3. Elastomeric or thermosetting:

- based on butyl rubber or similar B 80 - based upon ethylene uropylene rubber EPR

or similar ( EPM or EPDM ) - based upon chemically cross-linked XLPE

polyethylene - based upon silicon rubber s 95

MAXIMUM RATED CON- DUCTOR TEMPERATURE (“C)

r----h- Normal Shorl7

Operation Circuit

(4) (5)

60 150

75 160

80 220 85 250

85 250

95 350

*Rules for rounding off numerical values ( revised).

.4

10242 (Part S/Set 11) - 1986

2.2 Electrical Characteristics - The test requirements for electrical characteristics of insulating compounds are listed in Table 2.

-

TABLE 2 TEST REQUIREMENTS FOR ELECTRICAL CHARACTERISTICS OF INSULATING COMPOUNDS

SL DESIGNATION OF INSULATINQ No. COMPOUblD

(1) (2) 1. Insulation resistance constant

Ki ( M Q km ) ( see Note )

a) at 27”C, Min

b) at maximum operating temperature

2. Increase in ac capacity after immersion in water at 50°C ( percent )

a) between the end of the first day and the end of the 14th day, Max

b) between the end of the 7th day and the end of the 14th day, Max

;P8:/ XLPE s 95 PVC/ P;C/ ~rETlHo; A

( REF TO PART No. op IS : 108109

(3) (4) (5) (6) (7) (8) 43

3 670 (t) 1500 36-7 36.7

3.67 ( t ) 2 0.037 O-037

28

I5 - 15 15 15

5 - 5 5 5

NOTE - Insulation resistance test may be done at room temperature instead of 27°C. However, in case of doubt or dispute, the test results shall be confirmed by testing at 27°C.

*Methods of test for cables. tUnder consideration.

2.3 Mechanical Characteristics - The test requirements for mechanical characteristics of both aged and non-aged insulating compounds are listed in Table 3.

2.4 Particular Characteristics - The test requirements for particular characteristics of insulation compounds are listed in Table 4..

IS : 10242 (Part 3/Set 11) - 1986

TABLE 3 TEST REQUIREMENTS FOR MECHANICAL CHARACTERISTICS OF INSULATING COMPOUNDS

( CIause 2.3 )

(1) (2) 1. Mechanical characteristics

without ageing

1 .l Tensile strength, Min ( N/mm2 )

I .2 Elongation at break, Min ( percent )

2. Mechanical characteristics after ageing in air oven

1

temperature (tolerance Treatment 9~2°C)

duration ( h )

2.1 Tensile strength:

a) minimum value ( N/mma) b) variation, MUX ( percent )

2.2 Elongation at break: a) minimum value ( percent ) b) variation, Max ( percent )

3. Mechanical characteristics after ageing in air bomb at 0.55 f PO2 MPa

I

temperature (tolerance Treatment f2”C)

duration ( h )

3.1 Tensile strength:

a ) variation, Max ( percent )

3.2 Elongation at break:

a ) variation, Max ( percent )

*Methods of test for cables.

EBPSRO’ XLPE s95 PVACI Py B$;zt

(REP TO

p2iTIY 10810*\

(3) (4) (5) (6) (7) (8)

7

4.2 12.5 5.0 12.5 125

200 200 150 150 125

11

135 135 200 80 135

168 168 240 168 168

Go *<5 4.0 - f20 12.5 12.5 f25

Go f25 - 120 - f20 150 f35 125

16

127 - - - -

40 - - - -

f30 - - - -

f30 - - - -

6

IS : 10242 (Part 3,&ec 11) - 1986

TABLE 4 TEST REQUIREMENTS FOR PARTICULAR CHARACTERISTICS OF INSULATING COMPOUNDS

SL DNONATION OF INSULATING EPR/ No. COMPOUND B 80

(1)

1.

1.1

2.

2.1

2.2

3.

4.

4.1

5. 5.1

(2) (3) Hot deformation test Test temperature ( tolerance f2”C ) - Time u$)er load 1 ls&y~;;~

Maximum permissible depth of indentation ( percent ) Hot set test

r

temperature (tolerance f2”C) time under

Treatment 4 load (minutes) 1 mechanical lstress (N/cm2 )

Maximum elongation under load ( percent ) Maximum permanent elongation ( percent )

Heat shock test

t

temperature Treatment (tolerance f 2°C)

duration (h) Visual examination

Loss 0 f mass temperature

Treatment i

(tolerance f 2°C) duration (h)

Maximum permissible loss of mass (m&ma ) Behaviour at low temperature

(5) (6) (7)

- 80 95 - - - - 6” 6” - - 50 50

250 (t) - -

15 (t) - -

20 (i) - -

175 (t) - -

15 (0 - -

- - 150 150

- - 1 1 No signs of cracks or scales

- - 80 -

- - 168 - - - 2 -

Tests to be carried out with previous

%%& test (for core diameter <125&m) ’

( CIousr 2.4 )

XLPE

(4)

- - - -

200

15

20

175

15

-

-

(RI&TO PART No. OF 1s : 10810.)

(8) 15

30

14

IO

20 and 21

Test temperature (“C) Visual examination

- - -1s -15 No signs of cracks or scales

( Continued)

7

IS : 10242 (Part B/Set 11)’ - 1986

TABLE 4 TEST REQUIREMENTS FOR PARTICULAR CHARACTERISTICS OF INSULATING COMPOUNDS - Conrd

%.

(1) 5.2

5.3

6.

DESIGNAT~~F~FULATING

(REF TO PART No.

OF 1s : 10810*)

(2) (3) (4) (5) (6) (7) (8)

Elongation test ( for cores not subjected to the bending test ) Test temperature ( “C ) (for core diameter 612.5 mm)

Impact test

- - - -15 -15

Test temperature ( for core - -

- -15 -15 diameter712.5 mm ) (“C)

Ozone resistance test Ozone concentration 0.025 - - - - ( by volume ) (percent)

o*$o

Test duration without cracks(h) 30 - - - - Visual examination No signs of cracks or scales

*Methods of test for cables. TUnder consideration.

13

,. IS : 10242 (Part 3/Set 11) - 1986

( ContinueJ from page 2 )

Panel for Cables, ETDC 62/P4

Convener

SHRl K. v. R. RAO

Members

Representing

The Indian Cable Co Ltd, Jamshedpur

SHRI S. BHATTACHARYA ( Alternate to Shri K1 V. R. Rao )

SHRI S. P. CHOUDHRY Delton Cable Industries Ltd, New Delhi SHRI M. M. HONAVAR Cable Corporation of India Ltd, Bombay

SHRI S. R. PADMANABHAN ( Alternate ) SHRI P. V. NARASIMHAN Hindustan Shipyard Ltd, Vishakhapatnam

SHRI P. S. P. RAO ( Alternate ) CDR S. S. PARMAR Directorate of Production and Inspection ( DGI),

CDR VINOD KUMAR ( Alternate ) Ministry of Defence

SHRI H. D. PENDSE Mazagon Dock Ltd, Bombay SHRI B. D. POPAWALA (Alternate )

SHRI S. SANKARA RAMAN Universal Cables Ltd, Satna SHRI R. C. AGARWAL ( Alternate )

SHRI S. R. SARVAN SIXRI P. J. C. SERENO

Industrial Cables ( India ) Ltd, Rajpura Cochin Shipyard Ltd, Cochin

SHRI K. T. KOEHUPAUL ( Alternate )

~EBNA’EIONAL SYSTEM OF UNITS ( $1 UNITS )

Base Units

QUAMIITY

Length Mass Time Electric curqeat Thermodynamic

temperature Luminous intensity

Amount of substance

Supplementary Units

QUANTITY Plane angle Solid angle

Derived Units

QUANTITU

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

UNIT

metre kilogram second ampere kelvin

candela mole

UNIT radian eteradiao

UNIT

newton joule watt weber tcsla hertz siemens volt Pascal

SYMBOL

m kg

: K

cd mol

SYMaOL rad Sr

SYMBOL

N

J W Wb T HZ s V Pa

DIWINITION

1 N = 1 kg.m/ss 1 J = 1 N.m I W = 1 J/s I Wb = 1 V.s 1 T = 1 Wb/ms 1 Hz = 1 c/s (s -1) 1 S = 1 A/V 1 V== 1 W/A 1 Pa = 1 N/ma