Specification No.CSC-130/R-1/DH/UH/P&D/2016-17
Technical Specifications
for
24fiber/48fiber armoured
Underground Optical Fiber Cable
Issue Month:June-2016
(CSC Amendment date 14.06.2016
Common Specification Committee
UHBVN & DHBVN
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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
Fiber Color
:ITU-T-G652D
:TIA/EIA-598 or IEC 60304 or
Bellcore GR-20 colour coding scheme
Mechanical and Environmental performances
of the optical fiber cable
:EIA/TIA-455-82B & IEC 60794-1-2F5
: EIA-455-37 & IEC 60796-E11
: EIA-455-41 & IEC 60794-1-E4
: EIA-455-41 & IEC 60794-1-E3
: EIA-455-33A & IEC 60794-1-E1
: EIA-455-85 & IEC 60794-1-E8
: EIA-455-104 & IEC 60794-1-E6
: EIA-455-3A & IEC 60794-1-F1
•
Mechanical and Environmental performances
of the optical fiber
:EIA-455-78A & IEC 60793-1-C1A
: IEC 60793-1-CIC
: EIA-455-167A & IEC 60793-1-C9B
: IEC 60793-A-A2
: IEC 60793-1-C7A
: IEC 60793-1-D1
3. Climatic Conditions of the Installation:
1
2
3
4
5
Location
Maximum ambient air temperature
Minimum ambient air temperature
Average daily maximum ambient
temperature
Max yearly weighted average ambient
Haryana
50 deg C
(-)5 deg C
40 deg C
32 deg C
Page 2 of 16
temperature
Isoceraunic level
Maximum altitude above mean sea level
Minimum relative humidity
Max. relative humidity
Average no of rainy days/ year
Basic Wind Speed
Avg. Annual rainfall
Pollution
Maximum wind pressure
Sesimic Zone
6
7
8
9
10
11
12
13
14
15
45 days/year
1000 meters
26%
100%
120
47m/s
900 mm
Moderate
195 kg/ m sq
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
requirements4.1. 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 belowThe optical fiber should meet technical parameters as below:-
Page 3 of 16
S.No.
1
Parameter
Fiber Description
Unit
Value
Dual –Window Sigle -Mode
2
MFD at 1310
MFD at 1550
µm
9.2+/-0.4
10.4 +/-0.6
3
4
5
6
7
Core Diameter
Cladding Diameter
Cladding non-circularity
Mode Field concentricity error
Attenuation (Fiber)
@1310
@1550
@1625
Attenuation (Cabled)
@1310
@1550
@1625
Chromatic disperson
In 1288-1339
In 1270-1360
@1550
PMD @ 1310 & 1550 Cabled
Individual fiber
Link design value
Zero Disperson slope
Water peak at 1383+3 nm
Water peak at 1385 nm
Zero Disperson Wave Length
Point Discontinuity
Fiber Cut-Off
Cable Cut-Off
Attenuation Vs Wavelength
1285-1330 nm
1525-1575 nm
Refractive Vs Differences
Effective group index of
Refraction
µm
µm
%
µm
dB/Km
8.3
125±1
≤1
≤0.6 (Nominal 0.25)
8
9
10
11
12
13
14
15
16
17
18
≤0.350
≤0.210
≤0.240
db/Km
≤0.350
≤0.210
≤0.240
Ps/nm.km
≤3.50
≤5.3
18
Ps/sq.root km
Ps/(nm2.km)
Db/km
Db/km
Nm
Db
Nm
Db/km
%
≤0.2 (Nominal 0.1)
≤0.1
≤0.092
≤1.0 (Nominal 0.5)
≤0.310
1300-1324
≤0.05 at 1310, 1550 & 1625
≤1320 (Nominal 1280)
≤1260
Ref ƛ are 1310 & 1550 nm
≤0.05 (Nominal 0.03)
≤0.05 (Nominal 0.03)
Please Specify
Please specify Neff @ Nominal
MFD
Page 4 of 16
19
20
Coating geometry dia
Coating/cladding concentricity
Um
Um
245+/-10
≤12
4.4.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:
1
4.5.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±0.5
4.7.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
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G. Fiber micro-bend:
Mandrel Dia mm
No. of Turns
Wave length nm
Induced attenuation in
dB
32
1
1550
<0.5
50/75
100
1310
<0.05
50
100
1550
<0.10
60/75
100
1550
<0.05
The induced attenuation due to fiber wrapped around a mandrel of a specified diameter.
≤0.05 Db/km
H. Induced Attenuation at 1310/1550/1625 nm:
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 cable @ 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.
5.2. Secondary Protection:
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Loose packing within a tube, which shall be filled with thyrotrophic jelly to protect the
coated fibers.
5.3. 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 167-92B FOR AISI 304.
5.7 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
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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
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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
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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 60794-1-F5/EIA 455-82B) Test
Duration 24 hours
23.
Seepage of filling compound
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24.
Stress/Strain Test (as per EIA 455-33A)
25.
Cable Cut-off wavelength Test (EIA 455-170)
The Impact test stated above shall be carried out in accordance with IEC:60794-1-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 60793-1-40
Or EIA/TIA 455-78A
2
Attenuation Variation with
Wavelength
As per Section-02 of TS
IEC 60793-1-40
Or EIA/TIA 455-78A
3
Attenuation at Water Peak
IEC 60793-1-40
Or EIA/TIA 455-78A
4
Temp. Cycling
IEC 60793-1-52
Or EIA/TIA 455-3A, 2 cycles
(Temp dependence of
Attenuation)
5
Attenuation With Bending
(Bend Performance)
As per Section-02 of TS
IEC 60793-1-47
Or EIA/TIA 455-62A
Page 11 of 16
Table 1-1(b)
Type Tests For Optical Fibres
S. No.
6
Test Name
Acceptance Criteria
Mode Field dia.
Test procedure
IEC 60793-1-45 Or EIA/TIA
455164A/167A/174
7
Chromatic Dispersion
IEC 60793-1-42 Or EIA/TIA
455168A/169A/175A
8
Cladding Diameter
IEC 60793-1-20 Or EIA/TIA
455-176
9
Point Discontinuities of
attenuation
IEC 60793-1-40 Or EIA/TIA
455-59
10
Core -Clad concentricity error
IEC 60793-1-20 Or EIA/TIA
455-176
11
Fibre Tensile Proof Testing
IEC 60793-1-30
Or EIA/TIA 455-31B
-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 factory11.1. 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
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 455-176
9.Cladding diameter: as per EIA/TIA 455-176
10..Fiber tensile Proof Testing. : as per EIA/TIA 455-31B
8.Visual Material Verification & dimensional checks as per approved DRS/Drawings.
11.2. 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
11.3. Environment Test: As per sampling plan for Factory Acceptance Tests
11.4. 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
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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.
sdS.E./P&D, DHBVN
Cum-member Secretary
CSC, UHBVN/DHBVN
Page 14 of 16
GTP for 24fiber/48fiber armoured Underground Optical Fiber Cable to be filled by the
bidder:
S.No.
1
Parameter
Fiber Description
Unit
Value
Dual –Window Sigle -Mode
2
MFD at 1310
MFD at 1550
µm
9.2+/-0.4
10.4 +/-0.6
3
Core Diameter
4
5
Cladding Diameter
Cladding non-circularity
6
Mode Field concentricity error
7
Attenuation (Fiber)
8
9
10
µm
µm
8.3
125±1
%
≤1
µm
≤0.6 (Nominal 0.25)
dB/Km
@1310
≤0.350
@1550
≤0.220
@1625
≤0.240
Attenuation (Cabled)
db/Km
@1310
≤0.350
@1550
≤0.220
@1625
≤0.240
Chromatic disperson
Ps/nm.km
In 1285-1330
≤3.50
In 1270-1340
≤5.3
@1550
18
PMD @ 1310 & 1550 Cabled
Ps/sq.root km
Individual fiber
≤0.2 (Nominal 0.1)
Link design value
≤0.1
11
Zero Disperson slope
Ps/(nm2.km)
≤0.092
12
Water peak at 1383+3 nm
Db/km
≤1.0 (Nominal 0.5)
Water peak at 1385 nm
Db/km
≤0.310
13
Zero Disperson Wave Length
Nm
1300-1324
14
Point Discontinuity
Db
≤0.05 at 1310, 1550 & 1625
15
Fiber Cut-Off
Nm
≤1320 (Nominal 1280)
16
Cable Cut-Off
≤1260
Attenuation Vs Wavelength
Ref ƛ are 1310 & 1550 nm
1288-1339 nm
1525-1575 nm
To be filled
by the
Bidder
Db/km
≤0.05
≤0.05
Page 15 of 16
17
Refractive Vs Differences
%
Please Specify
18
Effective group index of Refraction
19
Coating geometry dia
Um
245+/-10
20
Coating/cladding concentricity
Um
≤12
Please specify Neff @ Nominal MFD
Page 16 of 16