BURKINA FASO
NATIONAL ELECTRICITY COMPANY OF BURKINA
STATE COMPANY WITH CAPITAL OF 63,308,000 270 CFA FRANCS
Headquarters: 55, Avenue de la Nation 01 BP 54 Ouagadougou 01
SOLAR PLAN BURKINA: YELEEN PROJECT
CALL FOR TENDER DOSSIER
Construction of the 90 kV double-tern power line between the
Ouagadougou Northwest substation and the Kossodo substation
CALL FOR TENDER DOSSIER
Construction of the 90 kV double-
tern power line between the
Ouagadougou Northwest substation
and the 90 kV Kossodo substation
Characteristics of the fiber optic ground wire:
The contractor must offer a fiber optic ground wire with its accessories in accordance with the
standards in force and which must have the following main characteristics:
A steel layer coated with aluminum and / or aluminum
A central aluminum tube containing the fibers or with hollow stainless steel strands
containing the fibers.
Mechanical and electrical characteristics: close to those of the ground wire with a
section of 107 mm².
The structure of the OPGW and its accessories must be adapted to the type of
pollution that crosses the corridor of the line and the different climatic conditions.
The 107 mm² ground wire has the following characteristics:
Section: 107 mm²
Diameter: 15.3 mm,
Almelec section: 63 mm²
Steel Section: 44 mm²
Composition-Almélec: 20 strands x 2 mm,
Composition Steel: 14 strands x 2 mm
Approximate mass: 0.63 kg / km,
Minimum breaking load: 8500 da / N
Elasticity module: 112,000 MPa
Coefficient of expansion: 15.5 (10-6K-1),
Number of Fiber: 48
Spare parts and special tools for the fiber optic ground wire (OPGW)
The following documents must be provided:
5% of the total length of fiber optic ground wire on metal reels; these drums will be stored at
the location designated by the Client, avoiding any direct contact with the ground;
(05) complete sets of anchors;
(10) complete sets of suspension;
(5) in-line splice boxes;
(2) terminal junction boxes;
(20) ground wire vibration dampers.
Fiber optic type
• The OPGW with 48 non-zero shifted dispersion fibers conforming to ITU-T G 655 and IEC
793-1 recommendations.
It should be noted that for saline and chemical pollution environments, the contractor
is required to provide references for the supply and assembly of fibers dedicated to
such environments.
A site reconnaissance visit must be carried out before the tenders are submitted.
Single-mode optical fibers that are optimized for the 1310nm region can also be used at
1550nm.
Fiber optic color
Each fiber should be identified by a color code according to the EIA / TIA 598 standard for
color coding sequential numbers and the EIA 359 / IEC 304 standard for the specification of
color tolerances.
The color codes are as follows:
Coded Color Code Color
d
1 Blue 7 Red
2 Orange 8 Black
3 Green 9 Yellow
4 Brown 10 Purple
5 Grey 11 Pink
6 White 12 Transparent
Mechanical characteristics of the fiber optic earth wire
Maximum voltages
100% of maximum voltage in normal operation (TMON)
70% of ultimate tensile strength (RUT)
100% of the vibration limit voltage (TLV)
Arrow
The maximum final deflections of the Fiber Optic Guard Cable at 75 ° C with creep shall be
fifteen percent (15%) less than that of the conductor cable.
Junction box
The optical junction boxes applied to the pylons will have two (2) entrances at each end of
the section.
Optical termination boxes installed at post gantries must be designed for the junction of a
OPGW and an approach cable.
An output of the OPGW and approach cable connection must be provided in accordance with
IEC 529.
The junction boxes must be with the same cable glands as the outer layer of the cable.
Optical junction and termination boxes must comply with the following specifications:
Degree of protection: IP65
Material: Aluminum alloy
Attenuation and attenuation
The attenuation coefficients of G 655 mono-mode fibers must comply with the standards in
force or have more efficient values.
The maximum attenuation at a splice at 1310 nm <0.1 db
The maximum attenuation at a splice at 1550 nm <0.05 db
Testing
Optical, electrical and mechanical tests of the fiber optic earth wire must be carried out
according to the following standards or equivalent standards:
IEC 1232,
IEC 794-1,
IEC 104,
IEC 68-2-14,
IEC 1396,
IEC 793-1,
IEC 529,
IEC 304,
EIA 455-81,
EIA 359A,
EIA359,
ITU-T G 655,
TIA 598
IEC 1089 and / or NFC 34.120
IEEE-1138
It should be noted that this list of test standards is not exhaustive, other tests may be required
for the cases of OPGW located in saline and chemical polluting environments.
The tests must be carried out in a neutral and approved laboratory.
