web viewdry power frequency withstand voltage. kv. 900. wet power frequency withstand voltage ......
TRANSCRIPT
Annex 9 – Schedules of Guaranteed CharacteristicsKENYA - UGANDA INTERCONNECTION
400 kV DOUBLE CIRCUIT – LINE (OPERATED INITIALLY AS A 220 kV OHTL)
(Revision 2)
Nile Basin Initiative – Nile Equatorial Lakes Subsidiary Action ProgramInterconnection of Electric Grids of Nile Equatorial Lakes CountriesTender Documents – Lot A: 400 kV Transmission Line for Kenya-Uganda Power Interconnection (Lessos – Uganda Border)
Table of Contents
Conductor............................................................................................................................................ 3
Steel Overhead Ground Wire..............................................................................................................4
Optic Overhead Ground Wire (OPGW)...............................................................................................5
Suspension Insulator String/Set........................................................................................................6
Tension Insulator String/Set...............................................................................................................7
Jumper Support Insulator String/Set.................................................................................................7
Transposition Suspension Insulator String/Set................................................................................8
Hardware and Fittings......................................................................................................................... 9
Suspension Clamps for Conductor....................................................................................................9
Suspension Clamps for GSW.............................................................................................................9
Suspension Clamps for OPGW..........................................................................................................9
Tension Clamps for Conductor (Full Tension)................................................................................10
Tension Clamps for GSW (Full Tension).........................................................................................10
Tension Clamps for OPGW...............................................................................................................10
Arcing Horns...................................................................................................................................... 10
Joint Sleeves (Full Tension).............................................................................................................11
Joint Boxes and Splices for OPGW.................................................................................................11
Terminations for OPGW.................................................................................................................... 11
Armour Rods for Conductor.............................................................................................................12
Armour Rods for GSW...................................................................................................................... 12
Armour Rods for OPGW.................................................................................................................... 12
Repair Sleeve for Conductor............................................................................................................13
Repair Sleeve for GSW...................................................................................................................... 13
Repair Sleeve for OPGW................................................................................................................... 13
Spacers............................................................................................................................................... 14
Vibration Dampers for Conductor....................................................................................................14
Vibration Dampers for GSW..............................................................................................................14
Vibration Dampers for OPGW...........................................................................................................15
Hold Down Weights........................................................................................................................... 15
Aviation Warning Devices................................................................................................................. 15
Part 2 : Section VI – Employer’s RequirementsAnnex 9 – Schedule of Guaranteed Characteristics, 400kV Line, rev 2 Page 2 of 16
Nile Basin Initiative – Nile Equatorial Lakes Subsidiary Action ProgramInterconnection of Electric Grids of Nile Equatorial Lakes CountriesTender Documents – Lot A: 400 kV Transmission Line for Kenya-Uganda Power Interconnection (Lessos – Uganda Border)
Part 2 : Section VI – Employer’s RequirementsAnnex 9 – Schedule of Guaranteed Characteristics, 400kV Line, rev 2 Page 3 of 16
Nile Basin Initiative – Nile Equatorial Lakes Subsidiary Action ProgramInterconnection of Electric Grids of Nile Equatorial Lakes CountriesTender Documents – Lot A: 400 kV Transmission Line for Kenya-Uganda Power Interconnection (Lessos – Uganda Border)
Conductor
Description Unit Requested Provided
Manufacturer
TypeAAAC
All Aluminum Alloy Conductor
Code Word FLINT
Standard ASTM B 399IEC 61089
Construction:
a) Aluminium wires No. 37b) Aluminium wire diameter mm 3.59
c) Aluminium alloy round aluminum-alloy 6201-T81
Total Sectional Area: mm2 375.5 Overall diameter: mm 25.17 Unit weight: N/m 10.15
kg/km 1028
Rated strength (ultimate tensile strength): kN 108.54 Modulus of elasticity:
Initial, minimum kN/mm2 46.2 Initial, maximum kN/mm2 55.8 Final kN/mm2 60.7
Coefficient of linear expansion: x10-6/°C 23.04 Direction of outermost layer Right (z) Every day stress N/mm2 70 Current rating at 25°C ambient: kA 790 DC resistance at 20°C: Ω/km 0.0892 Aluminium wire minimum conductivity at 20°C % IACS 52.5%
Part 2 : Section VI – Employer’s RequirementsAnnex 9 – Schedule of Guaranteed Characteristics, 400kV Line, rev 2 Page 4 of 16
Nile Basin Initiative – Nile Equatorial Lakes Subsidiary Action ProgramInterconnection of Electric Grids of Nile Equatorial Lakes CountriesTender Documents – Lot A: 400 kV Transmission Line for Kenya-Uganda Power Interconnection (Lessos – Uganda Border)
Steel Overhead Ground Wire
Description Unit Requested Provided
Manufacturer
Type GSW 70
Standard ASTM A 363IEC 60888
Material Galvanized steel Coating Zinc coating Minimum zinc coating weight
Construction No. of wires per strand 7 Nominal wire diameter 3.68 Helical form concentric left lay
Total Area: mm2 97 Overall diameter: mm 11.11 Unit weight: kg/km 595 Ultimate tensile strength (minimum): kN 88 Every day stress N/mm2 180 Galvanised steel wire minimum tensile strength N/mm2 1314 Galvanised steel wire minimum elongation in
250mm % 1.0
Galvanised steel wire minimum stress at 1% elongation N/mm2 1200
Part 2 : Section VI – Employer’s RequirementsAnnex 9 – Schedule of Guaranteed Characteristics, 400kV Line, rev 2 Page 5 of 16
Nile Basin Initiative – Nile Equatorial Lakes Subsidiary Action ProgramInterconnection of Electric Grids of Nile Equatorial Lakes CountriesTender Documents – Lot A: 400 kV Transmission Line for Kenya-Uganda Power Interconnection (Lessos – Uganda Border)
Optic Overhead Ground Wire (OPGW)
Description Unit Required ProvidedProperties of optical fibers contained inside OPGW cableManufacturer
Material Silica
Index profile Single-mode NZDS
Standard ITU-T G.655
Number of fiber glass cores 96
Concentricity error at 1550m (core to cladding) μm < 1
Cladding diameter μm 125 ±1
Mode field diameter at 1550 nm (MFD) μm 8 – 11 ± 0.6
Attenuation at wave length 1550 nm dB/km < 0.25
Attenuation at wave length 1625 nm dB/km < 0.27
Chromatic dispersion at W.L. 1530 to 1565 nm ps/(nm.km) 2.0 – 6.15
Chromatic dispersion at W.L. 1565 to 1625 nm ps/(nm.km) 4.5 – 12.4
Polarization Mode Dispersion (PMD) ps/sqrt km < 0.5
Average splicing loss dB/joint 0.05
Maximum splicing loss dB/joint 0.10
Construction and properties of OPGW cableManufacturer
International Standards IEEE 1138IEC 60793
IEC 60794-4
Material of conductor Aluminum clad steel wireIEC 61232
Number and diameter of wires No./ mm
Conductor overall diameter, nominal mm 21
Tolerance of overall diameter %
Cross-section area, total mm²
Stranding direction (outer layer) Right-hand
Standard mass kg/km < 820
Rated Ultimate Tensile Strength (UTS), IEEE 1138 kN > 85
Maximum recommended load kN
Every day stress (20% UTS) N/mm2
Maximum load in worst climatic condition (40% UTS) N/mm2
Standard resistance at 20 ºC Ω/km
Minimum short circuit current capacity (0.5 sec) kA 31.5 (min. 496 kA2s)
DC resistance at 20°C Ω/km 0.15
Operating temperature ºC -30 to + 70
Minimum bending radius mm
Minimum length of conductor on drum km 4
Part 2 : Section VI – Employer’s RequirementsAnnex 9 – Schedule of Guaranteed Characteristics, 400kV Line, rev 2 Page 6 of 16
Nile Basin Initiative – Nile Equatorial Lakes Subsidiary Action ProgramInterconnection of Electric Grids of Nile Equatorial Lakes CountriesTender Documents – Lot A: 400 kV Transmission Line for Kenya-Uganda Power Interconnection (Lessos – Uganda Border)
Suspension Insulator String/SetSuspension Composite Insulator String/Set (note 1)
Description Unit Requested Provided
Applicable voltage (maximum system voltage) kV 420
Overall length of set, including all fittings mm < 4500
Creepage path per string (leakage distance) mm 8400
Dry power frequency withstand voltage kV 900
Wet power frequency withstand voltage (1 min.) kV 710
Dry lightning impulse withstand voltage kV 1060
Corona test voltage kV 290
Radio noise level, insulator set dB 45
Short circuit current capacity, any part of insulator set (0.5 sec)
kA 31.5
Mechanical failing load, single insulator string kN 1 x 120
Overall weight, single insulator string kg
Mechanical failing load, double insulator string kN 2 x 120
Overall weight, double insulator string kg
Note 1: Electrical values to be given for insulator equipped with required arcing rings.
Suspension Composite Insulator (note 1)
Description Unit Requested Provided
Manufacturer
TypeLong rod, composite
ANSI Class or IEC C29.11/ C29.12
Material, weathersheds and housing Material, core
silicone rubberFRP (fiberglass
reinforced plastic)
Grading rings Applied, line end and ground end
Overall length mm < 3900
No. of sheds (large/ small) /
Ball and socket size (IEC 60120) mm
Weight kg
Arcing gap mm 3300
Creepage path (leakage distance) mm 8400
Mechanical failing load kN 120
Mechanical routine test load kN 60
Power frequency flashover (dry) kV 1150
Power frequency flashover (wet) kV 1050
Critical Impulse Flashover voltage, positive kV 2050
Critical Impulse Flashover voltage, negative kV 2150
Part 2 : Section VI – Employer’s RequirementsAnnex 9 – Schedule of Guaranteed Characteristics, 400kV Line, rev 2 Page 7 of 16
Nile Basin Initiative – Nile Equatorial Lakes Subsidiary Action ProgramInterconnection of Electric Grids of Nile Equatorial Lakes CountriesTender Documents – Lot A: 400 kV Transmission Line for Kenya-Uganda Power Interconnection (Lessos – Uganda Border)
Tension Insulator String/SetTension Composite Insulator String/Set (note 1)
Description Unit Requested Provided
Applicable voltage (maximum system voltage) kV 420
Number of insulators per string 3
Mechanical failing load kN 3 x 120
Overall length of set, including all fittings mm < 4500
Creepage path per string (leakage distance) mm 8400
Dry power frequency withstand voltage kV 900
Wet power frequency withstand voltage (1 min.) kV 710
Dry lightning impulse withstand voltage kV 1060
Corona test voltage kV 290
Radio noise level, insulator set dB 45
Short circuit current capacity, any part of insulator set (0.5 sec)
kA 31.5
Overall weight, complete insulator string kg
Note 1: Electrical values to be given for insulator equipped with required arcing rings.
Tension Composite Insulator (note 1)
Description Unit Requested Provided
Manufacturer
TypeLong rod, composite
ANSI Class or IEC C29.11/ C29.12
Material, weathersheds and housing Material, core
silicone rubberFRP (fiberglass
reinforced plastic)
Grading rings Applied, line end and ground end
Overall length mm < 3900
No. of sheds (large/ small) /
Ball and socket size (IEC 60120) mm
Weight kg
Arcing gap mm 3300
Creepage path (leakage distance) mm 8400
Mechanical failing load kN 120
Mechanical routine test load kN 60
Power frequency flashover (dry) kV 1150
Power frequency flashover (wet) kV 1050
Critical Impulse Flashover voltage, positive kV 2050
Critical Impulse Flashover voltage, negative kV 2150
Part 2 : Section VI – Employer’s RequirementsAnnex 9 – Schedule of Guaranteed Characteristics, 400kV Line, rev 2 Page 8 of 16
Nile Basin Initiative – Nile Equatorial Lakes Subsidiary Action ProgramInterconnection of Electric Grids of Nile Equatorial Lakes CountriesTender Documents – Lot A: 400 kV Transmission Line for Kenya-Uganda Power Interconnection (Lessos – Uganda Border)
Jumper Support Insulator String/Set
Description Unit Requested Provided
Applicable voltage (maximum system voltage) kV 420
Number of insulators per string 1
Mechanical failing load kN 1 x 120
Overall length of set, including all fittings mm < 4500
No. of sheds (large/ small) /
Ball and socket size (IEC 60120) mm
Creepage path per string (leakage distance) mm 8400
Dry power frequency withstand voltage kV 900
Wet power frequency withstand voltage (1 min.) kV 710
Dry lightning impulse withstand voltage kV 1060
Corona test voltage kV 290
Radio noise level, insulator set dB 45
Short circuit current capacity, any part of insulator set (0.5 sec)
kA 31.5
Overall weight, complete insulator string kg
Note 1: Electrical values to be given for insulator equipped with required arcing rings.
Transposition Suspension Insulator String/Set
Description Unit Requested Provided
Applicable voltage (maximum system voltage) kV 420
Number of insulators per string 1
Mechanical failing load kN 1 x 120
Overall length of set, including all fittings mm < 4500
No. of sheds (large/ small) /
Ball and socket size (IEC 60120) mm
Creepage path per string (leakage distance) mm 8400
Dry power frequency withstand voltage kV 900
Wet power frequency withstand voltage (1 min.) kV 710
Dry lightning impulse withstand voltage kV 1060
Corona test voltage kV 290
Radio noise level, insulator set dB 45
Short circuit current capacity, any part of insulator set (0.5 sec)
kA 31.5
Overall weight, complete insulator string kg
Note 1: Electrical values to be given for insulator equipped with required arcing rings.
Part 2 : Section VI – Employer’s RequirementsAnnex 9 – Schedule of Guaranteed Characteristics, 400kV Line, rev 2 Page 9 of 16
Nile Basin Initiative – Nile Equatorial Lakes Subsidiary Action ProgramInterconnection of Electric Grids of Nile Equatorial Lakes CountriesTender Documents – Lot A: 400 kV Transmission Line for Kenya-Uganda Power Interconnection (Lessos – Uganda Border)
Hardware and FittingsGenerally the composition of insulator hardware shall be of that specified in the drawings, but not limited thereto, and the ultimate strength of the hardware for tension insulator strings shall be not less than 360 kN, and for single suspension and double suspension strings not less than 120 kN and 240 kN respectively.
Suspension Clamps for Conductor
Description Unit Requested Provided
Material of body Aluminium
Applied conductorFLINT
(AAAC)
Ultimate body strength kN 11.5
Armour rods Applied
Galvanising, if applicable BS 729
Suspension Clamps for GSW
Description Unit Requested Provided
Material of body Steel
Applied conductor GSW 70
Ultimate body strength kN 7.5
Armour rods Not applicable
Galvanising, if applicable BS 729
Suspension Clamps for OPGW
Description Unit Requested Provided
Material of body Steel
Applied conductor OPGW 96
Ultimate body strength kN 7.0
Armour rods Applied
Galvanising, if applicable BS 729
Part 2 : Section VI – Employer’s RequirementsAnnex 9 – Schedule of Guaranteed Characteristics, 400kV Line, rev 2 Page 10 of 16
Nile Basin Initiative – Nile Equatorial Lakes Subsidiary Action ProgramInterconnection of Electric Grids of Nile Equatorial Lakes CountriesTender Documents – Lot A: 400 kV Transmission Line for Kenya-Uganda Power Interconnection (Lessos – Uganda Border)
Tension Clamps for Conductor (Full Tension)
Description Unit Requested Provided
Type Compression
Material of body Aluminium
Applied conductorFLINT
(AAAC)
Ultimate breaking strength kN 82.7
Galvanising, if applicable BS 729
Tension Clamps for GSW (Full Tension)
Description Unit Requested Provided
TypeBolted or
Compression
Material of body Steel
Applied conductor GSW 70
Ultimate breaking strength kN 85
Galvanising, if applicable BS 729
Tension Clamps for OPGW
Description Unit Requested Provided
Type Preformed dead-end
Material of body Steel
Applied conductor OPGW 96
Ultimate breaking strength kN 44.7
Galvanising, if applicable BS 729
Arcing Horns
Description Unit Requested Provided
Type
Material of body Steel
Mechanical load withstand kN 1.5
Galvanising, if applicable BS 729
Part 2 : Section VI – Employer’s RequirementsAnnex 9 – Schedule of Guaranteed Characteristics, 400kV Line, rev 2 Page 11 of 16
Nile Basin Initiative – Nile Equatorial Lakes Subsidiary Action ProgramInterconnection of Electric Grids of Nile Equatorial Lakes CountriesTender Documents – Lot A: 400 kV Transmission Line for Kenya-Uganda Power Interconnection (Lessos – Uganda Border)
Joint Sleeves (Full Tension)
Description Unit Requested Provided
For conductor tensile strength kN 82.7
For GSW tensile strength kN 85
Joint Boxes and Splices for OPGW
Description Unit Requested Provided
Optical losses dBNo more than 0.1 db
per splice, average 0.05 db
Terminations for OPGW
Description Unit Requested Provided
Optical losses dBNo more than 0.1 db
per splice, average 0.05 db
Part 2 : Section VI – Employer’s RequirementsAnnex 9 – Schedule of Guaranteed Characteristics, 400kV Line, rev 2 Page 12 of 16
Nile Basin Initiative – Nile Equatorial Lakes Subsidiary Action ProgramInterconnection of Electric Grids of Nile Equatorial Lakes CountriesTender Documents – Lot A: 400 kV Transmission Line for Kenya-Uganda Power Interconnection (Lessos – Uganda Border)
Armour Rods for Conductor
Description Unit Requested Provided
Type Helical preformed
Material Aluminium alloy
Applied conductorFLINT
(AAAC)
Colour code
Rod diameter mm
Direction of lay
Length mm
Number of rods No
Armour Rods for GSW
Description Unit Requested Provided
Type Helical preformed
Material Aluminium alloy
Applied conductor GSW
Colour code
Rod diameter mm
Direction of lay
Length mm
Number of rods No
Armour Rods for OPGW
Description Unit Requested Provided
Type Helical preformed
MaterialAnti-corrosion
Aluminium alloy
Applied conductor OPGW 96
Colour code
Rod diameter mm
Direction of lay
Length mm
Number of rods No
Part 2 : Section VI – Employer’s RequirementsAnnex 9 – Schedule of Guaranteed Characteristics, 400kV Line, rev 2 Page 13 of 16
Nile Basin Initiative – Nile Equatorial Lakes Subsidiary Action ProgramInterconnection of Electric Grids of Nile Equatorial Lakes CountriesTender Documents – Lot A: 400 kV Transmission Line for Kenya-Uganda Power Interconnection (Lessos – Uganda Border)
Repair Sleeve for Conductor
Description Unit Requested Provided
Type Compression
Material Aluminium alloy
Applied conductorFLINT
(AAAC)
Length mm
Repair Sleeve for GSW
Description Unit Requested Provided
Type Compression
Material Aluminium alloy
Applied conductor GSW
Length mm
Repair Sleeve for OPGW
Description Unit Requested Provided
Type Helical preformed
MaterialAnti-corrosion
Aluminium alloy
Applied conductor OPGW 96
Length mm
Part 2 : Section VI – Employer’s RequirementsAnnex 9 – Schedule of Guaranteed Characteristics, 400kV Line, rev 2 Page 14 of 16
Nile Basin Initiative – Nile Equatorial Lakes Subsidiary Action ProgramInterconnection of Electric Grids of Nile Equatorial Lakes CountriesTender Documents – Lot A: 400 kV Transmission Line for Kenya-Uganda Power Interconnection (Lessos – Uganda Border)
Spacers
Description Unit Requested Provided
Type Cushion - grip Material of body Aluminium/ rubber
Applied conductorFLINT
(AAAC) Thermal rating (continuous) °C 125 Slip strength kN 12.3 Galvanising, if applicable BS 729
Vibration Dampers for Conductor
Description Unit Requested Provided
Type Clamp-grip Material of body Galvanized Steel
Applied conductorFLINT
(AAAC) Thermal rating (continuous) 125 Slip strength Galvanising, if applicable BS 729
Vibration Dampers for GSW
Description Unit Requested Provided
Type Clamp-grip Material of body Galvanized Steel Applied conductor GSW 70 Thermal rating (continuous) 125 Slip strength Galvanising, if applicable BS 729
Part 2 : Section VI – Employer’s RequirementsAnnex 9 – Schedule of Guaranteed Characteristics, 400kV Line, rev 2 Page 15 of 16
Nile Basin Initiative – Nile Equatorial Lakes Subsidiary Action ProgramInterconnection of Electric Grids of Nile Equatorial Lakes CountriesTender Documents – Lot A: 400 kV Transmission Line for Kenya-Uganda Power Interconnection (Lessos – Uganda Border)
Vibration Dampers for OPGW
Description Unit Requested Provided
Type Clamp-grip Material of body Aluminium alloy Applied conductor OPGW 96 Thermal rating (continuous) 125 Slip strength Galvanising, if applicable BS 729
Hold Down Weights
Description Unit Requested Provided
Type
Material of bodyCast iron hot dip
galvanized
Applied conductorFLINT
(AAAC)
Galvanising, if applicable BS 729
Aviation Warning Devices
Description Unit Requested Provided
Type
Day marking sphere approved by ICAO
and CAA
Material of sphereFibre reinforced polyester (FRP)
Material of clamp Aluminium/steel
Diameter mm 600
Colour code
Applied conductor GSW 70
Colour of sphere White/red
Fade resistant kN 6.4
Slip strength No
Galvanising, if applicable BS 729
Part 2 : Section VI – Employer’s RequirementsAnnex 9 – Schedule of Guaranteed Characteristics, 400kV Line, rev 2 Page 16 of 16