TRANSMISSION MATERIALS STANDARD SPECIFICATION
11-TMSS-01, Rev. 0
TABLE OF CONTENTS
1.0
SCOPE
2.0
CROSS REFERENCES
3.0
APPLICABLE CODES AND STANDARDS
4.0
DESIGN AND CONSTRUCTION REQUIREMENTS 4.1 4.2 4.3 4.4 4.5
5.0
6.0
TESTS 5.1
Routine and Type Tests
5.2
Production Sampling Tests
PACKING AND SHIPPING
FIGURE 1:
Cross-Section of XLPE Insulated, 69kV Power Cable (Typical)
FIGURE 2:
Reel Marking Locations
7.0
11TMSS01R0/AAG
General Design Criteria Materials Fabrication Marking
DATA SCHEDULE
Date of Approval: May 30, 2006
PAGE NO. 2 OF 16
TRANSMISSION MATERIALS STANDARD SPECIFICATION
1.0
11-TMSS-01, Rev. 0
SCOPE
This Transmission Material Standard Specification (TMSS) specifies the minimum technical requirements in respect of design, engineering, fabrication, construction, inspection, testing and performance of XLPE insulated, single core, aluminum or copper power cable, rated 69kV intended to be used in the Transmission System of Saudi Electricity Company, Kingdom of Saudi Arabia.
2.0
3.0
CROSS REFERENCES
2.1
This Transmission Material Standard Specification shall be read in conjunction with the Transmission General Specification No. 01-TMSS-01, titled "General Requirements for All Equipment/Materials", which shall be considered as an integral part of this TMSS.
2.2
This TMSS shall also be read in conjunction with Transmission Business Unit (TBU) of SEC Purchase Order or Contract Schedule for project, as applicable.
APPLICABLE CODES AND STANDARDS
The latest edition of the following Codes and Standards shall be applicable for the equipment/material covered in this TMSS. In case of conflict, the vendor/ manufacturer may propose equipment/material conforming to one group of Industry Codes and Standards quoted hereunder without jeopardizing the requirements of this TMSS. 3.1
IEC 60228
:
Conductors of Insulated Cables
3.2
IEC 60840
:
Power Cables with Extruded Insulation and Their Accessories for Rated Voltages Above 30kV (U m = 36kV) up to 150kV (U m=170kV)- Test Methods and Requirements.
4.0
3.3
IEC 60949
:
Calculation of Thermally Permissible Short-Circuit Currents, Taking into Account Non-Adiabatic Heating Effects
3.4
ICEA P-45-482
:
Short Circuit Performance of Metallic Shields and Sheaths of Insulated Cable
3.5
AEIC CS7
:
Specifications for Cross Linked Polyethylene Insulated Shielded Power Cables Rated 69 through 138kV
DESIGN AND CONSTRUCTION REQUIREMENTS
4.1
General 4.1.1
11TMSS01R0/AAG
The power cable shall meet or exceed the requirements of this Specification in all respects.
Date of Approval: May 30, 2006
PAGE NO. 3 OF 16
TRANSMISSION MATERIALS STANDARD SPECIFICATION
4.1.2
4.2
4.3
11-TMSS-01, Rev. 0
Manufacturer's drawings shall show the outline of the power cable, together with all pertinent dimensions. Any variations in these dimensions due to manufacturing tolerances shall be indicated.
Design Criteria 4.2.1
Unless otherwise specified, the cable shall be manufactured in accordance with AEIC CS7 and tested in accordance with AEIC CS7 or IEC 60840.
4.2.2
The power cable shall be designed for ambient temperature conditions specified in 01-TMSS-01.
4.2.3
The cable shall be designed to withstand a conductor temperature of 130°C without any detrimental effects on any of its components. However, the cable sizing shall be based on a maximum permissible continuous temperature of 90°C and emergency loading temperature of 105°C.
4.2.4
The cable design shall prevent ingress of water radially and longitudinally. Manufacturer shall clearly indicate the cable components providing the above water ingress prevention.
4.2.5
The construction of the cable shall be essentially as shown in Figure 1. The ratings and dimensions shall be as indicated in the Data Schedule.
Materials 4.3.1
Conductor The conductor shall be circular, compacted or compacted segmental, stranded aluminum or copper, class 2 per IEC 60228. The conductor sizes shall be 400, 630, 800, 1000, 1200, 1400, 1600 or 2000 mm².
4.3.2
Conductor Shield The conductor shield shall consist of an extruded black thermosetting semiconducting material compatible with the conductor and the extruded insulation. A suitable semiconducting tape may be applied between the conductor and the specified extruded semiconducting layer. The average thickness and minimum thickness of the conductor shield shall be as indicated in the Data Schedule.
4.3.3
Insulation The insulation shall be super clean cross-linked polyethylene (XLPE). The average thickness and minimum thickness of the insulation shall be as indicated in the Data Schedule.
11TMSS01R0/AAG
Date of Approval: May 30, 2006
PAGE NO. 4 OF 16
TRANSMISSION MATERIALS STANDARD SPECIFICATION
4.3.4
11-TMSS-01, Rev. 0
Insulation Shield The insulation shield shall consist of an extruded black thermosetting semiconducting material compatible with the XLPE insulation. The average thickness and minimum thickness of the insulation shield shall be as indicated in the Data Schedule.
4.3.5
Metallic Shield The metallic shield shall consist of copper wires with or without binding copper tape(s). The minimum short circuit current rating of the above metallic shield for one second duration shall be as indicated in the Data Schedule. IEC 60949 or ICEA Publication P-45-482 shall be used by the manufacturer to determine the effective cross-sectional area of the metallic shield and its short circuit current carrying capability. The individual strand of copper wires shall be sized to withstand mechanical stresses experienced during cable pulling and splicing.
4.3.6
Moisture Impervious Layers The moisture impervious layers shall consist of the following:
4.3.7
a.
First Layer (longitudinal water barrier) - a layer of semiconductive water blocking tape or powder between the insulation shield and the metallic shield. The thickness of this first moisture impervious layer shall be independent of that of the extruded insulation shield.
b.
Second Layer (longitudinal water barrier) - a layer of semiconductive water blocking tape or powder between the metallic shield and the third layer.
c.
Third layer (radial water barrier) - a layer of aluminum foil coated with ethylene acrylic acid copolymer or equivalent between the second layer and the overall jacket.
Jacket The jacket material shall be black linear low density polyethylene (LLDPE) or linear medium density polyethylene (LMDPE) The average and minimum thickness of the jacket shall be as indicated in the Data Schedule.
11TMSS01R0/AAG
Date of Approval: May 30, 2006
PAGE NO. 5 OF 16
TRANSMISSION MATERIALS STANDARD SPECIFICATION
4.3.8
11-TMSS-01, Rev. 0
Conductive Layer A conductive layer shall be applied over the jacket to serve as an electrode for testing the integrity of the jacket. The thickness of the conductive layer shall be sufficient so that the jacket integrity test can be done successfully. Thickness shall be as indicated in the Data Schedule.
4.4
Fabrication 4.4.1
The conductor shield, cross-linked polyethylene insulation and insulation shield shall be extruded by the simultaneous triple extrusion method to assure homogeneity between the insulation and the semiconducting shields. The insulation shield shall be bonded firmly and continuously to the insulation.
4.5
4.4.2
The cross-linking process shall be by the dry cure dry cooling or dry cure wet cooling method.
4.4.3
The power cable shall be free of material and manufacturing defects which would prevent it from meeting the requirements of this Specification.
Marking 4.5.1
11TMSS01R0/AAG
The jacket for all the cables shall be embossed marked in Arabic and English at intervals not exceeding one meter with the following minimum information: a.
Electric Cable
b.
Voltage designation, 69kV
c.
Type of insulation, XLPE
d.
Insulation thickness, mm
e.
Conductor cross-sectional area, mm² and material
f.
The manufacturer's name or trademark
g.
Year of manufacture
h.
Cumulative length at every one meter with the highest length mark on the outer end of the cable.
4.5.2
All cables shall be marked with “ Property of Saudi Electricity Company” in both Arabic and English.
4.5.3
Marking by matrix print is not acceptable. Date of Approval: May 30, 2006
PAGE NO. 6 OF 16
TRANSMISSION MATERIALS STANDARD SPECIFICATION
5.0
11-TMSS-01, Rev. 0
TESTS
All tests results shall be provided for review and acceptance by TBU. 5.1
Routine and Type Tests
5.2
6.0
5.1.1
Routine and type tests per AEIC CS7 or IEC 60840 are acceptable.
5.1.2
A longitudinal water tightness type test shall be conducted on the cable in accordance with the requirements of IEC 60840.
5.1.3
The completed reeled cable partial discharge test data shall be submitted on a printout sheet of an X-Y recorder showing the partial discharge curve of each cable.
Production Sampling Tests 5.2.1
Production sampling tests shall be conducted on the cable in accordance with the requirements of AEIC CS7.
5.2.2
Production quality requirements for the insulation and semi-conducting shields shape as per AEIC CS7.
PACKING AND SHIPPING
In addition to the applicable items per 01-TMSS-01, packing and shipping of the cable shall conform to the following : 6.1
A pulling eye attached to the conductor shall be provided at the outside cable end of each cable shipping length.
6.2
The cable ends shall be sealed with a waterproof, heat shrinkable plastic or elastomeric end cap with adhesive type sealing compound. Cable ends shall be properly secured to the reel.
6.3
The cable shall be delivered without splices, on standard sized non-returnable steel drums of sturdy construction properly packed and lagged externally to prevent the cable from possible damage during transport. Wood lagging shall be used and have a minimum thickness of 50mm.
6.4
Reel Markings 6.4.1
Cable reels/drums shall be marked in legible and indelible letters giving the following particulars: a. b. c. d.
11TMSS01R0/AAG
Cable voltage and conductor size Type of cable Length and weight of cable on reel Gross weight Date of Approval: May 30, 2006
PAGE NO. 7 OF 16
TRANSMISSION MATERIALS STANDARD SPECIFICATION
e. f. g. h. i. j. k. l.
11-TMSS-01, Rev. 0
Dimensions of reel Manufacturer's name and country of origin TBU Purchase Order number J.O. number/Contract number (if applicable) Serial number of reel TBU stock number in 10 cm high bold numerals. Direction of rolling of reel 11-TMSS-01, Rev. 0
Reel marking locations shall be as shown in Figure 2.
11TMSS01R0/AAG
6.4.2
All markings shall appear on both sides of the reel.
6.4.3
Cable reel identification shall include any additional information as required by the TBU shipping instructions.
Date of Approval: May 30, 2006
PAGE NO. 8 OF 16
TRANSMISSION MATERIALS STANDARD SPECIFICATION
11TMSS01R0/AAG
Date of Approval: May 30, 2006
11-TMSS-01, Rev. 0
PAGE NO. 9 OF 16
TRANSMISSION MATERIALS STANDARD SPECIFICATION
11TMSS01R0/AAG
Date of Approval: May 30, 2006
11-TMSS-01, Rev. 0
PAGE NO. 10 OF 16
TRANSMISSION MATERIALS STANDARD SPECIFICATION
11-TMSS-01, Rev. 0
7.0 DATA SCHEDULE 69kV, XLPE POWER CABLE SEC Enquiry No.
Date:
SEC Purchase Order No. or Contract No.
Date:
SEC PTS No./Project Title with J.O. No. REFERENCE SECTION NO.
3.0
DESCRIPTION
'A'
'B'
'C'
APPLICABLE CODES AND STANDARDS *
4.0
DESIGN AND CONSTRUCTION REQUIREMENTS
4.2
Design Criteria/Rating a. Reference Manufacturing Standard b. System Short Circuit Current, kA c. Maximum conductor short circuit current temperature, °C d. Maximum permissible continuous conductor temperature, °C e. Emergency Loading • Maximum emergency conductor loading temp.,°C • Permissible Load in Amps, A • Allowable loading duration; hrs
4.2
i) ii) 4.3 4.3.1
During any 12 months During the life of the cable
AEIC 40 250
90
105 *
72 1500
Material Details : Conductor : Material (A1 or Cu?)
'A' 'B'
- TBU SPECIFIED DATA/PARAMETERS - BIDDER/SUPPLIER/VENDOR/CONTRACTOR PROPOSED DATA/ PARAMETERS 'C' - REMARKS SUPPORTING THE PROPOSED DEVIATION IN COLUMN 'B' (*) - DATA/PARAMETER TO BE PROVIDED/PROPOSED BY THE BIDDER/SUPPLIER/ VENDOR/CONTRACTOR IN COLUMN 'B'
11TMSS01R0/AAG
Date of Approval: May 30, 2006
PAGE NO. 11 OF 16
TRANSMISSION MATERIALS STANDARD SPECIFICATION
11-TMSS-01, Rev. 0
7.0 DATA SCHEDULE 69kV, XLPE POWER CABLE REFERENCE SECTION NO.
DESCRIPTION
No. of strands (400mm², 630mm²) (1200mm² or 2000mm²)
'A'
'B'
'C'
≥ 53
Dia. of strand prior to compaction, mm
*
Cross-sectional area, mm² (400, 630,1200 or 2000) Diameter, mm Resistance at 20°C, Ω/km Temp. coefficient at 20°C/°C
*
Skin effect loss factor (k s)
*
Proximity effect loss factor (k ρ)
*
DC resistance at 90°C, Ω/km AC resistance at 90°C Ω/km Short circuit capability of conductor in kA for 1 second starting with 90°C conductor temperature up to max. short circuit current temperature 4.3.2
Conductor shield: Material Average thickness, mm 400mm² 630 to 2000mm²
SEMICON
0.625 0.750
Minimum thickness, mm 400mm² 630 to 2000mm²
0.5 0.6
Dia. over conductor shield, mm
11TMSS01R0/AAG
*
Date of Approval: May 30, 2006
PAGE NO. 12 OF 16
TRANSMISSION MATERIALS STANDARD SPECIFICATION
11-TMSS-01, Rev. 0
7.0 DATA SCHEDULE 69kV, XLPE POWER CABLE REFERENCE SECTION NO.
DESCRIPTION
Thermal resistivity, K.m/W 4.3.3
'C'
Insulation: SUPER CLEAN XLPE
Average thickness, mm Minimum thickness, mm Diameter over insulation, mm Thermal resistivity, K.m/W Relative permittivity or dielectric constant (ε) Loss factor (δ ) Specific Resistance, MΩ-km (Actual Test Value)
4.3.5
'B'
*
Material
4.3.4
'A'
Insulation shield: Material Average thickness, mm Minimum thickness, mm Diameter over insulation shield, mm Thermal resistivity, K.m/W Metallic shield: Material Wire size, mm² No. of wires Binding Copper tape thickness, mm Total effective cross-sectional area mm² Diameter over metallic shield, mm Temp. coefficient at 20°C,/°C DC resistance at 20°C, Ω/km AC resistance at 20°C Ω/km Self inductance, mH/km Short circuit capability in kA for 1 second of the metallic shield computed per ICEA Publication P-45-482, starting with 90°C conductor temperature :
11TMSS01R0/AAG
16.5 14.85 * * * * *
SEMICON
1.720 1.375 * *
COPPER * * * * * * * * * *
Date of Approval: May 30, 2006
PAGE NO. 13 OF 16
TRANSMISSION MATERIALS STANDARD SPECIFICATION
11-TMSS-01, Rev. 0
7.0 DATA SCHEDULE 69kV, XLPE POWER CABLE REFERENCE SECTION NO. 4.3.6
DESCRIPTION
Moisture impervious layer (first layer): Material Thickness, mm Diameter over the layer, mm
'B'
'C'
SEMI-CONDUCTIVE SWELLING TAPE OR POWDER
0.25 *
Moisture impervious layer (second layer): Material Thickness, mm Diameter over the layer, mm
SEMI-CONDUCTIVE SWELLING TAPE OR POWDER
0.25 *
Moisture impervious layer (third layer): Material Thickness, mm Diameter over the layer, mm 4.3.7
'A'
Coated Aluminum Foil
* *
Jacket: Material (LLDPE or LMDPE?)
Average thickness, mm Minimum thickness, mm Overall cable diameter, mm 4.3.8
6.0
3.95 3.55 *
Conductive layer : Material Thickness, mm
* *
PACKING a. Total quantity required, m b. Are matched sets of cable reel length required? c. If "YES", how many reels are required per set? d. Tolerance in cable length of matched reel sets e. Conductor weight, kg/km f. Cable weight, kg/km g. Reel and cable weight, kg h. Cable length per reel, m
11TMSS01R0/AAG
* * * *
Date of Approval: May 30, 2006
PAGE NO. 14 OF 16
TRANSMISSION MATERIALS STANDARD SPECIFICATION
11-TMSS-01, Rev. 0
7.0 DATA SCHEDULE 69kV, XLPE POWER CABLE REFERENCE SECTION NO.
DESCRIPTION
'A'
i.
Cable reel diameter, mm
*
j.
Cable reel width, mm
*
'B'
'C'
OTHER REQUIRED INFORMATION a.
Life expectancy of cable, years
b.
3-phase inductance formation, mH/km
c.
d.
in
Over 30
trefoil
3phase capacitance in trefoil formation µF/km
*
*
Maximum permissible overload in % of 3 cables in underground cable duct trefoil formation, at 40°C soil temperature, for 1/2/3 hours (I1-hour / I2hours /I3-hours) starting with a prior loading of
I1-hour / I2-hours / I3-hours
50% 75% 100%
/ / /
e.
Maximum pulling Tension (kN)
*
f.
Maximum sidewall pressure, kN/m
*
g.
Minimum bending radius, mm
*
11TMSS01R0/AAG
Date of Approval: May 30, 2006
/ / /
I1-hour / I2-hours / I3-hours
/ / /
/ / /
PAGE NO. 15 OF 16
TRANSMISSION MATERIALS STANDARD SPECIFICATION
7.0
11-TMSS-01, Rev. 0
DATA SCHEDULE
69kV, XLPE POWER CABLE A.
ADDITIONAL TECHNICAL INFORMATION OR FEATURES TO BE FURNISHED BY SEC:
B.
ADDITIONAL SUPPLEMENTARY DATA OR BIDDER/VENDOR/SUPPLIER/CONTRACTOR:
B.
OTHER PARTICULARS TO BE FILLED UP BY BIDDER/VENDOR/SUPPLIER/ CONTRACTOR:
FEATURES
Actual Manufacturer of Equipment/Material
PROPOSED
BY
Vendor/Supplier/ Contractor
Name of the Company Location and address
Name and Signature of authorized epresentative and date
Official Seal/Stamp of the Company & Date
11TMSS01R0/AAG
Date of Approval: May 30, 2006
PAGE NO. 16 OF 16
