OPTICAL FIBER CABLE TESTING COMMISSIONING AND QUALITY CONTROL

The best Guide to Quality Control of Fiber Optic Cable in Underground Electrical Energy Transmission Line Project 

Type sample and routine tests shall be undertaken on non metallic underground fiber optic cable, all fittings & accessories and the optical fibers in a accordance with the requirements of this specification, CCITT G652, IEC 793 and IEC 794 as appropriate. 

Contract drawings previously submitted to the Engineer shall be available at the time of testing.

The contractor / supplier shall give the Engineer the requisite period of notice prior to undertaking the tests and shall submit to the Engineer a test program and procedures for approval.

What should be the Optical Fibers?

Optical fibres shall be tested in accordance with the requirements of CCITT |G652 and IEC 793 as appropriate.

How Would be the Optical Joint Boxes to joint the Fiber Cable?

Optical joint boxes shall be visually inspected to ensure they meet the specified requirement. 

If the external housing or its door show any signs of distortion than the box shall be rejected. 

Details of the inspection shall be recorded and shall be made available to the Engineer upon request.

Why Need Non-metallic Underground Fibre Optic Cable?

Non-metallic underground fibre optic cable and the optical shall be tested in accordance with the requirements of CCIT G652, IFC 793 and IFC 794 as appropriate.

 How Test Fibre Optic Cables?

All fibre optic cables shall be tested prior to dispatch using an OTDR on each fibre.

Test Certificates of Fiber Optic Cables

Test records covering Type and Sample tests shall be made available to the Engineer.

Certificates of Conformity

When requested copies of the following certificates / records shall also be forwarded:

·         Optical joint boxes visual inspection records.

·         Routine test records

·         The records of the OTDR test results.

How Ensure Factory Acceptance Teats for Fiber Optic Cable?

In case the FOC’s and fittings are a significant portion of the Contract the Employer reserves the right to attend Routine tests at works of the supplier. 

The Bidder shall include in its bid, all costs (airfares accommodation etc.) associated with two members of the Employer’s staff ant the Employer’s Representative, if applicable attending and witnessing the above factory acceptance tests.

TESTING AN COMMISSIONING OF OPTICAL CABLES

The contractor shall provide details of all proposed type, routine, sample, pre-commissioning and commissioning tests to be carried out each FOC cable type, for each drum of cable delivered and each FOC link installed as appropriate.

Routine Test of Materials for Fiber Optic CAble

The Contractor shall provide test certificates for routine tests which are performed to ensure basic materials meet the requirements of the FOC Types.

What Sample Test of Fiber Optic Cable to Carry Out?

Contractors shall provide test certificates of sample tests which are performed on each drum of cable manufactured. Such certificates shall include as a minimum:

·     Mode diameter on each fibre

·     Cut-off wave length on each fibre

·     Optical Domain Reflectometer (OTDR) scan results for               each fibre  

       at the  system wave length.

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Routine Test of Fiber Optic Cable

Contractors shall provide test certificates of routine tests which are performed on each cable Batch manufactured. The routine test shall include as a minimum:

·         Water immersion / penetration tests for all FOC type.

·         Cable tensile strength tests for all FOC type.

·         Repeat bending performance test for all FOC type.

·         Fibre strain test for all FOC type.

·         Cladding diameter measurement for all fibres on all                   FOC type.

·         Mode field concentricity error measurement on all fibre            on all FOC type.

SINGLE MODE OPTICAL FIBRE CABLE REQUIREMENTS

Particulars				Requirements
Coating diameter			μm	245 + 10
Cladding diameter			μm	125 + 1
Cladding non-circularity			%	< 1
Mode field diameter			μm	9 + 0.5
Mode field concentricity error			μm	< 1
Cut off wave length			nm	< 1270
Attenuation at (maximum average)	1285 nm	1330	dB/km	< 0.4
Attenuation at (maximum average)	1550 nm		dB/km	< 0.25
Zero dispersion wave length			nm	< 1310
Chromatic dispersion at	1285 nm	1330	dB/(km-nm)	< 3.5
Chromatic dispersion at	1550 nm		dB/(km-nm)	< 20
Individual splice loss			dB	< 0.15
Mean splice loss			dB	< 0.1

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What References Standards Should be followed to Construct Fiber Optic Cable?

The reference standards and other documents referred to in this Section of the Specification are listed below:


IEC 529:         Classification of decrees of protection provided by enclosures

IEC 793- 1:    Optical Fibres Part 1: Generic Specification

IEC 793-2:     Optical Fibres Part 2: Product Specification

IEC 794-1:     Optical Fibre Cable Part 1: Generic Specification

IEC 794-2:     Optical Fibre Cable Part 2: Product Specification

BS 729:          Specification for hot dip galvanised coatings on iron and steel  articles
BS 1490:        Specification for Aluminium and aluminium alloy ingots and castings for general engineering purposes

BS 3100:        Specification for steel castings for general engineering purposes

BS 3643:        Ingot zinc

BS 4190:        Specification for ISO Metric hexagon bolts, screws and nuts

BS EN 1676:  Aluminium and aluminium alloys - Alloyed ingots forremelting
BS EN10025: Specification for hot rolled products of non-alloying structural steels and their technical delivery requirements.

CCITT G652:  Characteristics of single mode optical fibre cable.