Disclosure to Promote the Right To Information

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

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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”

“!ा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 5801-2 (1970): Flexible Coaxial Radio Frequency Cableswith Characteristic Impedance 50 , Part 2: Cable Type50-3-2 [LITD 6: Wires, Cables, Waveguides and Accessories]

1s : 5801 ( Part II ) - 1970

Indian Standard SPECIFICATION FOR FLEXIBLE COAXIAL

RADIO FREQUENCY CABLES WITH CHARACTERISTIC IMPEDANCE 50 Q

PART II CArjLE TYPE 50-3-2

Cables, Wires and Waveguides for Telecommunication Equipment Sectional Committee, ETDC 42

Chairman SERI T; V. SRIRANQAN

Reprcscnting Directorate General of Posts & Telegraphs ( Depart-

ment of Communication ). New Delhi

Members SHRI S. BALRAM Civil Aviation Department (Ministry of Tourism &

Civil Aviation 1 SH~I RAM KUMAR GUPTA Delton Cables Co, Delhi

SHRI OBX PAVL (Abnnd#) SARI K. GURVRAJA Bharat Electronics Ltd, Bangalore

SARI R. SOJ~ASEEEARA ( A&trnalc ) Da KAILASH CHANDRA National Physical Laboratory ( CSIR ), New Delhi SWRI P. S. SHINIVASA MODALIAR Radio & Electricals Mfg Co Ltd, Bangalore SERI A. NAQARAJA RAO Hindustan Aeronautics Ltd, Hyderabad

SHRI V. RAMAMOAAN RAO.( Altemntc) SARI K. V. R. RAO Henley Cables India Ltd, Poona SHRI U. D. N. RAO Indian Telephone Industries Ltd, Bangalore Srisr V. S. Rao Directorate General of Inspection (Ministry of

Defence ) SHRI P. S. WAI~AR ( Alternate )

REPUESENTATIVE Central Electronics Engineering Research Institute I CSIR 1. Pilani I ---~ ,I

.~~

Sam S. K. ROY Hindustan Cables Ltd, Roopnarainpur SHRI RF SEN ( Alternate )

DaE. SCHINMEL Siemens India Ltd, Bombay SHRI N. KUMAR ( Aknata)

SEW R. V. S. STTARAM In personal capacity (Tata Institute of Fundamental Raswrch, Bombqy )

SHRI K. SOMASUNDARAM Directorate of Technical Development & Production (Air) ( Ministry of Defence )

SWRI P. M. SAANKAR RAO ( Alternate) Snn~ Y. S. VENKATESWARAN, Director General, IS1 ( Ex-@cia Member )

Director ( Elec tech)

Secretaty

SHRI K. RAQXVNATAAN Assistant Director ( Elec tech ), IS1

INDIAN STANDARDS INSTITUTION MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG

NEW DELHI

ISr5601 (Part Ix).1979

hdian Standard SPECIFICATION FOR FLEXIBLE COAXIAL

RADIO FREQUENCY CABLES WITH CHARACTERISTIC IMPEDANCE 50 n

PART II CABLE TYPE 50-3-2

0. FOREWORD

0.1 This Indian Standard ( Part II) was adopted by the Indian Standards Institution on 27 August 1970, after the draft finalized by the Cables, Wires and Waveguides for Telecommunication Equipment Sectional Committee had been approved by the Electrotechnical Division Council.

0.2 This standard deals with flexible coaxial RF cables with solid polyethylene dielectric and having a cl1aracteristi.c impedance of 50 R.

0.3 Assistance has been derived from the corresponding specification 50-3-3/50-3-4of IEC Publication 96-2 (1961) ‘ Radio-frequency cables: Part 2 Relevant cable specifications’ issued by the International Electrotechnical Cqmmission.

0.4 The diameters for the plain high conductivity annealed copper wire for inner and outer conductors have been chosen from the table of dia- meters of round conductors in IS : 4800 (Part I )-1968*.

0.5 ‘Indian Standard specification for radio frequency cables: Part I General requirements and tests ’ [ IS : 5026 I Part I )-1969 1 is a necessary adjunct to this standard.

0.6 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, shall be rounded off in accordance with IS :2-1960-t. 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 II) specifies the dimensions, constructional details and the requirements for the RF flexible coaxial cables having type designation 50-3-2.

*Specification for enamelled round winding wires: Part I Conductor data. tRulca for rounding off numerical values ( r&sad ).

IS:5801 (Part II)-1970

. 2. TYPE DESIGNATION

2.1 The cables covered by this standard are designated as 50-3-2 in accordance with 5.1 of IS : 5026 (Part I)-1969*.

3. CONSTRUCTION AND DIMJXNSIONS

3.1 The cable shall consist of a single inner conductor of plain annealed and high conductivity electrolytic copper, the dielectric consisting of solid polyethylene extruded over the conductor. Over the dielectric, a single braid of plain annealed copper wire shall be applied and the cable shall be finished overall with non-contaminating sheath of suitably compounded PVC black in colour ( see Fig. 1 ).

Nominal A = 2.95 mm

FIG. 1 CABLE CONSTRUCTION

3.2 Dimensions-The dimensional requirements shall be in accordance with Table 1.

SL No.

(1)

i) ii)

iii)

iv)

“1 vi)

TABLE 1 DIMENSIONS

All dimennions in millimetres.

ITEM DESCRIPTION MINIMUM

(2) Inner conductor

Dielectric

Core Outer conductor

Sheath

Overall diameter

(3) Single

Thickness

Diameter over dielectri

Braid wire diameter

Thickness

(4) 0.801

0.85

2.82

0.137

0.58

4.8

NOMINAL MAXI- YUM

(5) (6) 0.90 0.909 - -

2.95 3.08

ti140 0.143

0.75 -

5.0 5.2

1\TorE 1 - The filling factor shall be @70 to @95.

NOTE 2 -The braid angle shall be ( 45”.

*Specification for radio frequency cables : Part I General requirements and tests,

3

IS15801 (Part II)-1970

4. MARKING

4.1 The provisions of 4 of IS

5. TESTS

: 5026 ( Part I )-1969, shall apply.

5.1 Conditions of Tests -The conditions of tests shall be in accordance with 6.1 of IS : 5026 ( Part I)-1969*.

5.2 Classification of Tests

5.2.1

a) b) c) d)

e) f ) g)

h)

j) k)

m)

5.2.2

a)

b) c) d) e) f )

5.2.3

a)

b)

Typ 7&s-The following tests shall be the type tests:

Dimensions, Resistivity of inner conductor, Dielectric strength of core, Insulation resistance,

Spark test, Discharge test, Characteristic impedance ( seL &ote ), '

NOTE- The characteristic impedance value ia computed from capacitance and velocity ratio measurements.

Attenuation, High temperature- test, Low temperature test, and

Flow test.

Acce~~ur~e Tests-The following test’s shall be the acceptance tests:

Dielectric strength of core,

Insulation resistance,

Characteristic impedance [see Note under 5.2.1 ( g ) 1,

Attenuation, Dimensions, and High temperature test.

Routine Tests-The following tests shall be the routine tests:

Spark test on the core, Dielectric strength of core,

C) Insulation resistance,

*Specification for radio frequency cables: Part ‘I General requirements and tests.

4

ls : 5801 (Part II) - 1970

d) Spark test on sheath, e) Discharge test, f) Characteristic impedance [see Note under 5.2.1 (g) 1, and g) Attenuation.

5.3 Electrical Tests -The electrical tests and the requirements shall be as given in Table 2.

TABLE 2: ELECTRICAL TEST REQUIREMENTS

SL TEST CLAUSE REFERENCE REQ~JIRE~ENT No.

IS : 50ygfkt I )-

(1) (2) (3). (4)

i) Resistivity of inner conductor 5.2.1 As stated in IS : 5026-1969+

ii) Dielectric strength of core 5.2.2 4kV(rms)

iii) Insulation resistance 5.2.3 Not less than 5 000 MQ km

iv) Spark test 5.2.4 3 kV(rms)

“) Extinction voltage ( Corona test ) 5.2.5 Not less than l-9 kV ( rms )

vi) Characteristic impedance 5.2.9 5Oi2Q

vii) Attenuation ( see Note ) 5.2.11 0.22 dB/m maximum

The measuring frequency shall be 200 MHz

NOTE - The expected nominal frequency-attenuation curve is given in Fig. 2. The manufacturer shall provide such a curve for hi cables.

*Specification for radio frequency cables: Part I General requirements and tests.

5.4 Climatic and Mechanical Robustness Tests-The tests and requirements shall be as given in Table 3.

TABLE 3 GLIlb%ATIG AND MEC&IANIGAL TEST.9 RRQUmRhfRNTg

SL TEST CLAUSE REFERENCE’ REQUIREWENT NO. IN

IS : 5026 ( Part I )- 1969*

(1) (2) (3) (4) . 1) High temperature test 5.4.3.2 Maximum permitted increase jn

attenuation shall be 0.3 dB/m Low temperature test 5.4.3.3 Tlrr sph;irr shall be subjected to

at a of -35°C

temperature

ii) Low temperature test 5.4.3.3 ‘Thh spcfcyn shall be subjected to at a

of -40°C temperature

iii) Flow test 5.5 The weight to be applied at each end of the sample shall be 25 N (2.5kgf)

*Specification for radio frequency cables: Part I General requirements and tests.

5

IS:!%01 (Part IJ)-1970

._ I i i i iiti i ii.Wi i iiti i iiiti i i Httttl s

Q F 1

10

100 1000

FREQUENCY Wizl

FIG. 2 TYPICAL FREQUENCY-ATIXNUATION mu FREQUBNCY- POWER RATING CURVES

6

6. SERVICE ENGINEERING DATA

IS : 5801 (Part II) - 197B

SL TEST DATA No.

1 Rated capacitance

2 Rated velocity ratio

3 Rated characteristic impedance

4 Maximum alternating voltage for continu- ous use

5 Maximum voltage for unidirectional pulse operation

6 Approximate weight

7 Minimum bending radius for: Indoor installations Outdoor installations

8 Minimum coiling diameter for drums and reels

9 Minimum flexing temperature

10 Maximum power rating in air

11 Nominal attenuation

100 pF/m

0.66

5OQ

2.6 kV ( peak)

5.2 kV (peak)

40 g/m

2.5 cm 5.0 cm

10 cm

-40°C

See Fig. 2

See Fig. 2

7