Technical Specifications for 24fiber/48fiber armoured Underground Optical Fiber Cable

Transcription

1 Specification No.CSC-130/R-1/DH/UH/P&D/ Technical Specifications for 24fiber/48fiber armoured Underground Optical Fiber Cable Issue Month:June-2016 (CSC Amendment date Common Specification Committee UHBVN & DHBVN Page 1 of 16

2 1. Scope: The scope of this document is to specify the technical requirement for 24F/48F Armoured Optical Fiber Cable for DHBVN. 2. Applicable Standards: The cable shall conform to the standards named below and the technical specifications described in the following sections. All standards, specifications and codes of practice referred to herein shall be the latest editions including all applicable official amendments and revisions as on date of opening of bid. In case of conflict between this specification and those (IS codes, standards etc.) referred to herein, the former shall prevail. Fiber :ITU-T-G652D Fiber Color :TIA/EIA-598 or IEC or Bellcore GR-20 colour coding scheme Mechanical and Environmental performances of the optical fiber cable :EIA/TIA B & IEC F5 : EIA & IEC E11 : EIA & IEC E4 : EIA & IEC E3 : EIA A & IEC E1 : EIA & IEC E8 : EIA & IEC E6 : EIA-455-3A & IEC F1 Mechanical and Environmental performances of the optical fiber :EIA A & IEC C1A : IEC CIC : EIA A & IEC C9B : IEC A-A2 : IEC C7A : IEC D1 3. Climatic Conditions of the Installation: 1 Location Haryana 2 Maximum ambient air temperature 50 deg C 3 Minimum ambient air temperature (-)5 deg C 4 Average daily maximum ambient 40 deg C temperature 5 Max yearly weighted average ambient 32 deg C Page 2 of 16

3 temperature 6 Isoceraunic level 45 days/year 7 Maximum altitude above mean sea level 1000 meters 8 Minimum relative humidity 26% 9 Max. relative humidity 100% 10 Average no of rainy days/ year Basic Wind Speed 47m/s 12 Avg. Annual rainfall 900 mm 13 Pollution Moderate 14 Maximum wind pressure 195 kg/ m sq 15 Sesimic Zone Zone-IV,III,II The atmosphere is generally laden with mild acid and dust in suspension during the dry months and subjected to fog in cold months 4. General Technical Requirements: The jelly Filled Multi-tube 24F/48F Fiber Optical Cable should meet the following technical requirements Fiber: The Dual window Single Moe Cladded Optical Fibers to be used in the Optical Fiber Cable should meet the ITU-T-G652D requirements. The fiber to be used should be from reputed manufacturer approved by DHBVN. 4.2.Number of Fibers: The No. of Fibers shall be 24 or 48 depending on the requirement. 4.3.Fiber Optic Parameters: The Optical Fiber should meet technical parameter as below- The optical fiber should meet technical parameters as below:- Page 3 of 16

4 S.No. Parameter Unit Value 1 Fiber Description Dual Window Sigle -Mode 2 MFD at 1310 MFD at 1550 µm 9.2+/ / Core Diameter µm Cladding Diameter µm 125±1 5 Cladding non-circularity % 1 6 Mode Field concentricity error µm 0.6 (Nominal 0.25) 7 Attenuation (Fiber) Attenuation (Cabled) Chromatic disperson Ps/nm.km In In & 1550 Cabled Ps/sq.root km Individual fiber 0.2 (Nominal 0.1) Link design value Zero Disperson slope Ps/(nm2.km) Water peak at nm Db/km 1.0 (Nominal 0.5) Water peak at 1385 nm Db/km Zero Disperson Wave Length Nm Point Discontinuity Db 0.05 at 1310, 1550 & Fiber Cut-Off Nm 1320 (Nominal 1280) Cable Cut-Off Attenuation Vs Wavelength Ref ƛ are 1310 & 1550 nm nm Db/km 0.05 (Nominal 0.03) nm 0.05 (Nominal 0.03) 17 Refractive Vs Differences % Please Specify 18 Effective group index of Refraction Please specify Nominal MFD Page 4 of 16

5 19 Coating geometry dia Um 245+/ Coating/cladding concentricity Um No. of Tubes and Fibers: The No. of tubes for 24F Optical Fiber Cable: 6 The No. of tubes for 48F Optical Fiber Cable: 6 The No. of Fibers per tube for 24F Optical Fiber Cable: 4 The No. of Fibers per tube for 48F Optical Fiber Cable: 8 No of Dummy for 24F/48F: Color of Tubes and Fibers: The Tube and fibers should be colored as per TIA/EIA-598 standard or IEC60304 or Bellcore GR20 colour coding scheme. 4.6.Diameter of Cable For 24F Cable (mm): 14.5±0.5 For 48F Cable (mm): 15.5± Life of Cable: The expected life of the cable is at least 25 years. The supplier shall submit necessary statistical calculation to prove this requirement. 4.8.Mechanical/Environmental requirements: A. Proof test: Entire length of the fiber should be subject to a tensile proof stress of > 100 (0.7 Gpa) B. Strip ability force: 1.3 F 8.9N C. Dynamic tensile strength: >3.8 Gpa(Nominal 5.26 Gpa) For both Unaged/Aged (30 days at 85 degree Celsius and 85% RH) D. Dynamic fatigue: 20 (Nominal 22) E. Static Fatigue: 20 (Nominal 25) F. Fiber curl: 4m radius of curvature Page 5 of 16

6 G. Fiber micro-bend: Mandrel Dia mm No. of Turns Wave length nm Induced attenuation in db <0.5 50/ < < / <0.05 The induced attenuation due to fiber wrapped around a mandrel of a specified diameter. H. Induced Attenuation at 1310/1550/1625 nm: 0.05 Db/km I. Temp Humidity Cycling -10 degree Celsius to 85 degree Celsius: < 0.05 db/km up to 98%RH where ref Temp is +23 degree Celsius J. Water Immersion 23 degree Celsius: 0.05 Db/km K. Heat Aging,85 degree Celsius, where Ref Temp is +23 degree Celsius: 0.05 Db/km 4.9.Mechanical Requirement of Cable After each mechanical test the change in attenuation shall 0.05 be db/km for each individual fiber. A) Tensile strength :The cable shall withstand a load of value 9.81 x 2.5 x W is the weight of 11km of the strain 0.25% B) Crush load : The cable shall sustain a compressive load of 4 KN/100x10mm. C) Impact load :Shall withstand an impact caused by a mass of weight of 50N D) Torsion load : Shall withstand a load of 100N for 2m cable length. E) Water penetration: Shall meet or exceed the limit as per latest. TEC specification. F) Cable bend : Minimum-bending radius will be 20D, where D is outer dia of the Cable. G) Others : Shall meet the latest TEC specification. 5. General Constructions: 5.1. Cable core Assembly: Primary coated fibers are placed in loose tubes which are around the central strength member. It shall be protected by means of filling compound having properties of nonhygroscope dielectric material or swelling tape Secondary Protection: Page 6 of 16

7 Loose packing within a tube, which shall be filled with thyrotrophic jelly to protect the coated fibers Strength member: Fiber reinforced plastic or non-metallic member which will be provided strength, and flexible enough in order to keep the fiber strain within the permissible values. 5.4 Filling Compound: It shall be compatible to the fiber, secondary protection, core wrapping etc., and preferably thyrotrophic jelly. It shall be removable easily for splicing of the fibers.it should inhibit generation of hydrogen within cable filling compound and should remain stable for ambient temperatures & should not drip, leak or flow. Drip point should not be less than 70 deg C. It should be non-toxic homogeneous water proffing compound that is free of dirt, ant- hygroscopic, electrically non-conductive. 5.5 Inner Sheath: The Fiber Optic Cable shall be covered with tough weather resistant Black High Density Polythene Compound (HDPE) of thickness not less than 1.2mm. It shall be circular, free from holes, joints, mended pieces and defects. 5.6 Armoring: Armoring shall be provided over inner sheath by Corrugated Stainless Steel Armoring Tape to make the cable rodent and Termite Proof. The steel tape should be both side coated with transparent polymer coating of minimum thickness of 0.05mm. The height of the corrugations shall be minimum 0.6 mm and the pitch of the corrugated tape shall be max. 2.5mm. The chemical and mechanical properties shall be as specified in Table 1 and 2 of ATSM:A B FOR AISI Outer Sheath: The armor shall be covered with tough weather resistant non-nylon High Density Polythene Compound (HDPE) of thickness not less than 1.6mm. It shall be circular, free from joints and other defects. 6. Cable drums, Marking, Packaging and Transport All optical fibre cable shall be supplied on strong wooden drums provided with lagging with adequate strength, constructed to protect the cabling against all damage and displacement during transit, storage and subsequent handling during installation. The cable drum shall be suitable to carry underground fibre optic cable of length up to 4 Km ±5% or 2 km ±10%. The Contractor may offer higher cable drum length in straight routes subject to transportation, handling and installation limitations. However, the exact lengths for drums to be supplied for each link shall be determined by the Contractor during detailed engineering/survey. Drum schedule shall be approved by the Employer before manufacturing the FO cable. Both cable ends in the drum shall be sealed and shall be readily accessible. The drum shall be marked with arrows to indicate the Page 7 of 16

8 direction of rotation. Both the ends of the cable shall be provided with pulling eye. The pulling eye and its coupling system should withstand the same tensile load as applicable to the cable. The following marking shall be done on each side of the cable drums. i) Drum number ii) Consignee s name and address iii) Contractor s name and address iv) Type of cable v) Number of fibres vi) Type of fibres vii) Year of manufacturing, month & batch no viii) Name of manufacturer ix) Total cable length x) Inner end marking and Outer end marking Packing list supplied with each drum shall have all the information provided on marking on the respective cable drum and following additional information: OTDR length measurement of each fibre and Ratio of fibre and cable length. 7. Optical fibre cable marking A suitable marking shall be applied in order to identify this cable from other cables. Marking on the cable shall be inde liable, of durable quality, shall last long and shall be applied at regular interval of one-meter length. Marking shall be imprinted and must clearly contrast with the surface and colors used must withstand the environmental influences experienced in the field. The accuracy of the sequential marking must be within + 0.5% of the actual measured length. The sequential length marking must not rub off during normal installation. In case laser printing is used the marking shall not exceed 0.15 mm depth. The optical fibre cable shall have the following markings in every meter. i) Type of Cable ii) Running meter length iii) Number of fibres iv) Type of fibre v) Laser symbol & caution notice vi) Year of manufacture and batch no. vii) Manufacturer s name viii) Employer s Name 8. Operating Instructions Page 8 of 16

9 Complete technical literature in English with detailed cable construction diagram of various sub-component with dimensions and test data of the cable shall be provided. All aspects of installation shall also be covered in the handbook. 9. Test and Inspection: The general conditions for Type, Factory Acceptance Testing & Site Acceptance testing shall be done as per the technical specification requirement. 10. Type Testing The bidder shall have valid Type Approval certificate (TAC) from TEC/Technical Specification Evaluation Certificate (TSEC) given by BSNL QA for 24/48F Metal free Optical Fibre Cable with Double HDPE Sheath OFCs at the time of offer of material for inspection and a copy of valid TAC/TSEC certificate shall be submitted along with the offer for inspection. However, the bidder shall ensure that, in all the cases the TSEC/TAC certificate would be valid at the time of offer for inspection. In case type approval certificate validity expires after placement of Letter of Award (LoA), the contractor shall take advance action so that the supply is not delayed due to non-availability of type approval certificate for the offered fibre optic cable meeting the requirement. In case, TSEC/TEC certificate of UGFO cable is not available, the Contractor shall submit the previously carried out type test report for the same design of cable for the tests listed in Table 1-1(a) below. The fibre should have been type tested as per relevant International standards for the tests listed in Table-1-1(b) and the Bidder shall submit the test reports and certificates along with the bid. Table 1-1 (a) Type tests for Approach cable/armoured Under ground Fibre Optic Cable 1. Tensile Strength Test 2. Abrasion Test 3. Crush Test (Compressive Test) 4. Impact Test Page 9 of 16

10 5. Repeated Bending Test 6. Torsion Test 7. Kink Test 8. Cable Bend Test 9. Temperature Cycling Test 10. Cabling Aging Test 11. Water penetration Test 12. Flexural Rigidity Test on the optical fibre cable 13. Test of Figure of 8 (Eight) on the cable 14. Static Bend test 15. Fibre curl 16. Cable sheath yield strength and ultimate elongation 17. Embrittlement Test on loose tube 18. Kink Resistance on loose tube 19. Drainage Test for loose Tube 20. Check of easy removal of sheath 21. Check of effect of aggressive media on the cable surface (Acidic and Alkaline behaviour 22. Water Ingress Test (as per IEC F5/EIA B) Test Duration 24 hours 23. Seepage of filling compound Page 10 of 16

11 24. Stress/Strain Test (as per EIA A) 25. Cable Cut-off wavelength Test (EIA ) The Impact test stated above shall be carried out in accordance with IEC: E4. Five separate Impacts of 2.0 kg shall be applied at different locations. The radius of intermediate piece shall be reel drum radius+/-10%. A permanent or temporary increase in optical attenuation value greater than 0.05db/km shall constitute failure. Table 1-1(b) Type Tests For Optical Fibres S. No. Test Name Acceptance Criteria Test procedure 1 Attenuation As per Section-02 of TS IEC Or EIA/TIA A 2 Attenuation Variation with Wavelength As per Section-02 of TS IEC Or EIA/TIA A 3 Attenuation at Water Peak IEC Or EIA/TIA A 4 Temp. Cycling (Temp dependence of Attenuation) As per Section-02 of TS IEC Or EIA/TIA 455-3A, 2 cycles 5 Attenuation With Bending (Bend Performance) IEC Or EIA/TIA A Page 11 of 16

12 Table 1-1(b) Type Tests For Optical Fibres S. No. Test Name Acceptance Criteria Test procedure 6 Mode Field dia. IEC Or EIA/TIA A/167A/174 7 Chromatic Dispersion IEC Or EIA/TIA A/169A/175A 8 Cladding Diameter IEC Or EIA/TIA Point Discontinuities of attenuation IEC Or EIA/TIA Core -Clad concentricity error IEC Or EIA/TIA Fibre Tensile Proof Testing IEC Or EIA/TIA B -End Of table- 11. Factory acceptance Test. Tests: Tests to be carried out on Optic Fiber Cable: Following Test Schedule shall be followed by the supplier as Acceptance Test of the Optical Fiber Cable at factory Optical Tests 1. Attenuation at 1310, 1550 and 1625 nm wavelength on 100% Fibers in all OFC drums. 2. PMD at 1310 and 1550 nm Wavelength on 40% of Fibers in a drum in at least 25% or Page 12 of 16

13 minimum 2 nos drums in a lot 3. Chromic dispersion test on 40$ of fibers in a drum in at least, 25% or minimum 2 nos of drums in a lot. 4. Spectral Attenuation Test on 25% fibers out of offered lot 5. Geometry Test on 10% of Fibers in a drum 25% 02 Minimum 2 nos of drums in a lot 6. Mode Field Diameter at 1310 and 1550 nm Wavelength on 20@ of the fibers in a drum, 25% or minimum 2 nos of drums in a lot. 7. Cable Cutoff at 1310 and 1550 nm Wavelength on 20% of fibers in a drum,25% or minimum 2 nos of drums in a lot. 8.Core-Clad Concentricity Error: as per EIA/TIA Cladding diameter: as per EIA/TIA Fiber tensile Proof Testing. : as per EIA/TIA B 8.Visual Material Verification & dimensional checks as per approved DRS/Drawings Mechanical Tests: 1. Tensile Strength Test 2. Crush Test. 3. Impact Test 4. Vibration Test 5. Torsion Test 6. Knit Test 7. Repeated Bending Test 8. Cable Bend Test 9. Drip Test 10. Drainage Test 11. Embrittle Test of Loose Tubes Environment Test: As per sampling plan for Factory Acceptance Tests Physical Test: 1. Sheath and Jacket thickness: 25% of drums or min 2 nos of drums in a lot to be tested. 2. Cable and outer diameter: 100% of the drums to be checked. 12. Pre Dispatch Inspection. During the course of manufacture, DHBVN representative shall have the right to inspect the materials, workmanship, labor and the progress of manufacture of the equipment and may reject any material which is defective or unsuitable for the purpose intended of which is not in accordance with the intent of the specification. Supplier, upon demand by DHBVN shall remedy or replace such defective or unsuitable material. Supplier shall provide the reasonable inspection facilities to DHBVN Inspector. Supplier shall give sufficient notice of readiness for inspection of component parts and before final assembly and tests, so that Page 13 of 16

14 DHBVN representative may witness such final and acceptance tests before shipment. DHBVN representative may, at any time inspect and copy any or all test data. Material shall be dispatched after specific material Dispatch Clearance Certificate is issued by DHBVN. 13. Warranty Period:- The supplier shall be responsible to replace, free of cost, with no transportation or insurance cost to the purchaser, up to destination, the whole or any part to the material which in normal and proper use proved as defective in quality or workmanship, subject to the condition that the defect is noticed within 72 months from the date of commissioning. The consignee or any other officer of Nigam actually using the material will give prompt notice of each such defect to the supplier. The replacement shall be effected by the supplier within a reasonable time, but not, in any case, exceeding 45 days/ The supplier shall, also, arrange to remove the defective material within a reasonable period, but not exceeding 45 days from the date of issue of notice in respect thereof, failing which, the purchaser reserve the right to dispose of defective material in any manner considered fit by him (purchaser), at the sole risk and cost of the supplier. Any sale proceeds of the defective material after meeting the expenses incurred on its custody, disposal handling etc., shall however be credited to the supplier s account and set off against any outstanding dues of the purchaser against the supplier. The warranty shall be for the entire duration of the warranty period. 14. Nigam s Quality Assurance Plan:- The Nigam s Quality assurance plan for the inspection of material at manufacturer s factory, post receipt inspection at Nigam s stores/ turnkey contractor s site stores, dispatch of material, supply lots, counter checking etc is in force for the procurement and turnkey works which shall be applicable, as the case may be, along with up-to-date amendments, if any. sd- S.E./P&D, DHBVN Cum-member Secretary CSC, UHBVN/DHBVN Page 14 of 16

15 GTP for 24fiber/48fiber armoured Underground Optical Fiber Cable to be filled by the bidder: S.No. Parameter Unit Value 1 Fiber Description Dual Window Sigle -Mode To be filled by the Bidder 2 MFD at 1310 MFD at 1550 µm 9.2+/ / Core Diameter µm Cladding Diameter µm 125±1 5 Cladding non-circularity % 1 6 Mode Field concentricity error µm 0.6 (Nominal 0.25) 7 Attenuation (Fiber) Attenuation (Cabled) Chromatic disperson Ps/nm.km In In & 1550 Cabled Ps/sq.root km Individual fiber 0.2 (Nominal 0.1) Link design value Zero Disperson slope Ps/(nm2.km) Water peak at nm Db/km 1.0 (Nominal 0.5) Water peak at 1385 nm Db/km Zero Disperson Wave Length Nm Point Discontinuity Db 0.05 at 1310, 1550 & Fiber Cut-Off Nm 1320 (Nominal 1280) Cable Cut-Off Attenuation Vs Wavelength Ref ƛ are 1310 & 1550 nm nm Db/km nm 0.05 Page 15 of 16

16 17 Refractive Vs Differences % Please Specify 18 Effective group index of Refraction Please specify Nominal MFD 19 Coating geometry dia Um 245+/ Coating/cladding concentricity Um 12 Page 16 of 16