TRANSMISSION MATERIALS STANDARD SPECIFICATION 11...

PAGE NO. 2 OF 1811TMSS03R0/AAG

Date of Approval: May 30, 2006

11-TMSS-03, Rev. 0TRANSMISSION MATERIALS STANDARD SPECIFICATION

TABLE OF CONTENTS 1.0 SCOPE 2.0 CROSS REFERENCES 3.0 APPLICABLE CODES AND STANDARDS 4.0 DESIGN AND CONSTRUCTION REQUIREMENTS 4.1 General 4.2 Design Criteria 4.3 Ratings 4.4 Materials 4.5 Marking 5.0 TESTS 5.1 Routine and Type Tests 6.0 PACKING AND SHIPPING FIGURE NO.1 : Cross-Section of Low Pressure Oil Filled, Paper Insulated Copper

Conductor, Single Core, 110kV, 115 kV, 132 kV, 230 kV or 380 kV power Cable (Typical)

FIGURE NO.2 : Reel Marking Locations 7.0 DATA SCHEDULE




1.0 SCOPE This TBU Material Standard Specification (TMSS) specifies the minimum technical

requirements for design, engineering, manufacture, inspection, testing and performance of low pressure oil-filled, paper insulated, single core, copper, 110kV, 115 kV, 132 kV, 230 kV or 380 kV rated power cable suitable for direct burial or in ducts installation to be used in the Transmission system of Saudi Electricity Company, Kingdom of Saudi Arabia.

2.0 CROSS-REFERENCES 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.

This TMSS shall also be read in conjunction with Transmission Business Unit of Saudi

Electricity Company (TBU) Purchase Order or Contract Schedules for project, as applicable. 3.0 APPLICABLE CODES AND STANDARDS

The latest revision 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 60141-1 Tests on Oil-Filled, Paper Insulated, Metal-Sheathed Cables and

Accessories for Alternating Voltages Up to and Including 400 kV

3.2 IEC 60228 Conductors of Insulated Cables

3.3 IEC 60229 Tests on Anti-Corrosion Protective Coverings of Metallic Cable Sheaths

3.4 IEC 60287 Calculation of the Continuous Current Rating of Cables (100%

Load Factor) 3.5 IEC 60502 Extruded Solid Dielectric Insulated Power Cables for Rated

Voltages from 1 kV up to 30 kV 3.6 IEC 60540 Test Methods for Insulations and Sheaths of Electric Cables and

Cords

3.7 IEC 60949 Calculation of Thermally Permissible Short-Circuit Currents, Taking into Account Non-Adiabatic Heating Effects

3.8 AEIC CS4 Specifications for Impregnated Low and Medium Pressure Self

Contained Liquid Filled Cable




3.9 ICEA P-45-482 Short Circuit Performance of Metallic Shields and Sheaths of

Insulated cable. 3.10 ASTM B29 Specifications for Pig Lead

3.11 54-TMSS-01 Electrical Insulating Oil for LPOF Cables

4.0 DESIGN AND CONSTRUCTION REQUIREMENTS 4.1 General 4.1.1 The power cable shall meet or exceed the requirements of this Specification

in all respects. 4.1.2 Manufacturer's drawings, as required by 01-TMSS-01, 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.

4.2 Design Criteria 4.2.1 The construction of the cable shall be essentially as shown in Figure No.1. 4.2.2 The mean of maximum ambient temperature over a 24 hour period (50°C)

shall be regarded as the basic temperature with the site conditions referenced in 01-TMSS-01.

4.2.3 The power cable shall be free of material and manufacturing defects which

would prevent it from meeting the requirements of this specification. 4.2.4 Unless otherwise specified, the cable shall be manufactured according to

AEIC CS4 and tested according to AEIC CS4 or IEC 60141-1. 4.3 Ratings In addition to the system parameters specified in 01-TMSS-01, the power cable shall

have the following ratings: 4.3.1 The cable shall be able to withstand conductor temperature of 85°C

continuously. 4.3.2 During emergency operation, the power cable shall be able to operate at a

maximum conductor temperature of 105°C for 100 hours and 100°C for 300 hours as given in Table IV of AEIC CS4.

Based on expected life of the power cable, the manufacturer shall provide

information in Data Schedule for the allowable annual/monthly loading duration for the cable on a l05°C or 100°C emergency loading temperature.




4.3.3 Unless otherwise specified in Data Schedule that a higher short circuit capacity is required, the cable shall be able to withstand a minimum short circuit current for 1 sec. as shown in Table I below:

Table I

Cable Voltage Rating (kV)

Minimum Short Circuit Current for 1 sec.

(KA) 110 or 115 40

132 40 230 63 380 63

4.4 Materials 4.4.1 Oil Duct The oil duct shall be formed by using open helix steel strip. The internal diameter of the helix shall be minimum of 12.7 mm. The

external diameter of the helix shall be nominal of 15.2 mm with tolerance of +3.8%.

4.4.2 Conductor The conductor shall be compacted, segmental, stranded copper conforming to

class 2 of IEC 60228. For 110 kV or 115 kV, the conductor sizes shall be 400, 630, 800, 1000,

1500 and 1600 mm². For 132 kV, the conductor sizes shall be 630, 900, 1200, 1600 and 2000mm². For 230 kV, the conductor sizes shall be 800, 1000, 1200, 1300, 1500, 1600,

2000 and 2500 mm². For 380 kV, the conductor sizes shall be 500, 800, 1000, 1200, 1500, 1600

2000 and 2500 mm². 4.4.3 Conductor Shield The conductor shield shall consist of metallized paper tape or semi-

conducting paper tape. The effective thickness of the conductor shield shall not exceed 0.25mm.

4.4.4 Insulation The power cable manufacturer shall ascertain that the paper insulation

conforms with the following minimum requirements:




a. The paper shall be only the best quality. b. The paper manufacturing process shall be by the Kraft or Sulphate

Process. In this process, the chips of wood are boiled in a superheated alkaline liquor.

c. In the washing stage, de-ionized water shall be used. d. Prior to reeling, the paper shall be calendered to obtain smooth finish

and higher density. The allowable number of registrations in the application of paper tape shall

be as specified in Clause 7.4 of AEIC CS4. The average thickness and the minimum thickness of the insulation shall not

be less than that given in Table II below: Table II

Cable Voltage Rating (kV)

Average Thickness of Insulation

(mm)

Minimum Thickness of Insulation

(mm)

110 or 115 11.1 10.0 132 12.0 11.0 230 19.3 18.0 380 28.6 27.3

4.4.5 Insulation Shield The insulation shield shall consist of metallized paper tape or semi-

conducting paper tape. The effective thickness of the insulation shield shall not exceed 0.25mm. 4.4.6 Metallic Sheath For power cables to be installed below water table level, extruded lead alloy

sheath shall be applied over the insulation shield. For power cables to be installed above water table level, seamless tube of

corrugated aluminum sheath can be used. The sheath must withstand the total short circuit return current, indicated in

Data Schedule, for 1 second without damage to the underlying components or outer jacket.




IEC 60949 or ICEA Publication P-45-482 shall be used by the manufacturer to determine the effective cross-sectional area of the metallic sheath and its short circuit current carrying capability.

4.4.7 Metallic Sheath Binder Tape A non-metallic binder tape of at least 0.2mm thickness shall be provided

between the metallic sheath and the reinforcing layer/sealing compound. 4.4.8 Reinforcing Layer (for Lead alloy sheathed cable only) A reinforcing layer shall be applied over the sheath to provide mechanical

protection for the cable. The layer shall be made from steel, copper, brass or bronze.

4.4.9 Sealing Compound The sealing compound shall be derived from bitumen and shall adhere to

the reinforcing layer or metallic sheath binder tape and the jacket. It shall not crack or run at any temperature during transit, storage, installation or actual operation. The compound shall have no deleterious effect on the metallic sheath, reinforcing layer and jacket.

4.4.10 Jacket The jacket material shall be PVC or black linear low density polyethylene

(LLDPE) or linear medium density polyethylene (LMDPE) or high density polyethylene (HDPE) tested per IEC 60502.

The average thickness of the jacket shall be 3.95mm. The minimum

thickness of the jacket shall be 3.55mm. 4.4.11 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 above

jacket test can be done successfully. 4.4.12 Cable Oil The oil used for impregnating the cable insulation shall comply with the

requirements of 54-TMSS-01. 4.5 Cable Marking 4.5.1 The Jacket for all the cables shall be marked by embossing in Arabic and

English at intervals not exceeding one meter with the following minimum information :




a. Electric Cable b. Voltage designation, 110 kV, 115 kV, 132kV, 230 kV or 380 kV c. Type of insulation d. Insulation thickness, mm e. Conductor cross section, 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. 5.0 TESTS All test results shall be provided for review and acceptance by TBU. 5.1 Routine and Type Tests 5.1.1 The cable shall be routine and type tested in accordance with all physical

and electrical tests and test methods as required in AEIC CS4. 5.1.2 Routine and type testing per IEC 60141-1 is also acceptable. 5.1.3 For the cable jacket, applicable type tests as stipulated in IEC 60229 and

IEC 60502 are required. 6.0 PACKING AND SHIPPING In addition to the applicable items per 01-TMSS-01, packing and shipping of the cable shall

conform the following : 6.1 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 firmly and properly secured to the reel.

6.2 The cable shall be delivered without splices, on standard sized non-returnable steel

reels of sturdy construction properly packed and lagged externally to prevent possible damage to the cable during transportation. Wood lagging shall be used and have a minimum thickness of 50mm. The wood lagging shall also be secured with steel straps to provide physical protection for the cables during transit, storage and handling operations.

6.3 The diameter of the drum of the shipping reel shall be not less than the minimum

bending diameter of the cable.




6.4 Each shipping length of cable shall be filled with insulating liquid and the channels shall be connected to one or more insulating liquid reservoirs consisting of gas-filled expansible metal cells surrounded by insulating liquid in an enclosing shell. The reservoirs shall have adequate capacity to maintain pressure on the cable throughout the ambient temperature range anticipated until the cable is installed.

6.5 Either a pressure gauge or a suitable fitting for use with a portable gauge shall be

connected so that the pressure on the insulating liquid in the cable may be determined. The connection between the cable and the reservoir shall contain a standard pipe union. The nut half of the union shall be on the reservoir side. The threaded half of the union shall be equipped with a small vent pipe, the vent being sealed at its outer end by means of a threaded hex cap and suitable gasket. Suitable precautions shall be taken to make all of these connections tight during shipment.

6.6 Reel Markings 6.6.1 Cable reels/drums shall be marked in legible and indelible letters giving the

following particulars: a. Cable voltage and conductor material and size b. Type of cable c. Length and weight of cable on reel d. Gross weight e. Dimensions of reel f. Manufacturer's name and country of origin g. TBU address and purchase order number h. J.O. number/Contract number (if applicable) i. Serial number of reel j. TBU stock number in 10 cm high bold numerals k. Direction of rolling l. 11-TMSS-3, Rev.0 Reel markings locations shall be as shown in Figure 2. 6.6.2 All markings shall appear on both sides of the reel. 6.6.3 Cable reel identification shall include any additional information as required

by TBU shipping instructions.




7.0 DATA SCHEDULE

110kV, 115 kV, 132 kV, 230 kV or 380 kV, LPOF POWER CABLE

SEC Enquiry No. Date: SEC Purchase Order No.

Date:

or Contract No. SEC PTS No./Project Title with J.O. No. REFERENCE SECTION NO. DESCRIPTION 'A' 'B' 'C' 3.0 APPLICABLE CODES AND STANDARDS Reference Manufacturing Standard AEIC 4.0 DESIGN AND CONSTRUCTION REQUIREMENTS 4.2 Design Criteria/Rating a. Cable Nominal Voltage, kV b. System Short Circuit Current for 1 sec.,

kA

c. Maximum conductor short circuit current temperature, °C 250

d. Maximum permissible conductor temperature, °C

i. Continuous 85 ii. 100 hours 105 iii. 300 hours 100 4.4 Materials 4.4.1 Oil Duct Type Material Internal Diameter, mm External Diameter, mm

'A' - TBU SPECIFIED DATA/PARAMETERS 'B' - 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'




7.0 DATA SCHEDULE

110kV, 115 kV, 132 kV, 230 kV or 380 kV, LPOF POWER CABLE REFERENCE SECTION NO. DESCRIPTION 'A' 'B' 'C' 4.4.2 Conductor material Copper Design * No. of strands * Dia. of strand prior to compaction, m * Cross-sectional area, mm²

(400, 500, 630, 800, 900, 1000, 1200, 1300, 1500, 1600, 2000, 2500)

Inner Diameter, mm * Outer Diameter, mm * Resistivity at 20°C, Ω-m * Temp. coefficient at 20°C, /°C * Skin effect loss factor (ks) * Proximity effect loss factor (kp) * Short Circuit capability of conductor in kA

for 1 second starting with initial conductor temperature of

i. 85°C * ii. 100°C * iii. 105°C * Temp. after short circuit, °C * 4.4.3 Conductor shield Material Paper Tape Average thickness, mm 110kV 400, 630, 800, 1000,

or 115 kV 1500, 1600 mm²

132 kV- 630, 900, 1200, 1600, 2000 mm²

230 kV - 800, 1000, 1200, 1300, 1500, 1600, 2000, 2500 mm²

380 kV - 500, 800, 1000, 1200, 1500,1600, 2000, 2500 mm²

Diameter over conductor shield, mm * Thermal resistivity, k.m/w * 4.4.4 Insulation Material Paper Average thickness, mm * Paper density, kg/cm³ * Thickness per layer, mm *




7.0 DATA SCHEDULE

110 kV, 115 kV, 132 kV, 230 kV or 380 kV, LPOF POWER CABLE REFERENCE SECTION NO. DESCRIPTION 'A' 'B' 'C' Diameter over insulation, mm * Thermal resistivity, k.m/W * Dielectric constant (ε) * Loss factor (δ) * 4.4.5 Insulation shield Material Paper Tape Min./max. thickness, mm * Diameter over insulation shield, mm * Thermal resistivity, k.m/w * ٤٫٤٫٦ Metallic Sheath Material Average thickness, mm * Effective cross-sectional area, mm² * Diameter over metallic shield, mm * Resistivity at 20°C, Ω-m * Temp. coefficient at 20°C, /°C * Thermal resistivity, Km/W * Short circuit capability in kA for 1 second

of the metallic sheath starting with 100° or 105°C conductor temperature

٤٫٤٫٧ Sheath Binder Tape Material * Nominal thickness, mm * Diameter over binder tape, mm * Thermal resistivity, k.m/w * ٤٫٤٫٨ Reinforcing Layer : (if applicable) Material * Number * Nominal thickness, mm * Width, mm * Diameter over reinforcing tape, m * Thermal resistivity, Km/W * ٤٫٤٫٩ Sealing Compound Material * Average thickness, mm *




7.0 DATA SCHEDULE

110 kV, 115 kV, 132 kV, 230 kV or 380 kV, LPOF POWER CABLE REFERENCE SECTION NO. DESCRIPTION 'A' 'B' 'C' Minimum thickness, mm * Diameter over sealing compound, mm * Thermal resistivity, Km/W * 4.4.10 Outer Jacket Material (PVC, LLDPE, LMDPE or HDPE) * Average thickness, mm * Minimum thickness, mm * Diameter over jacket, mm * Thermal resistivity, k.m/w * Max. continuous operating temp., °C * 4.4.11 Conductive Layer : Material * Average thickness, mm * Minimum thickness, mm * Thermal resistivity, Km/W * 4.4.12 Cable Oil-Volume [Refer to Data Schedule of 54-SMSS-01.

Vendor to fill in column "B" of the same]

Volume of oil in cable (l/km) * Cable Electrical Stress Characteristics : Maximum stress, kV/mm * Impulse stress : Conductor screen, kV/mm * Insulation screen, kV/mm * Design ac stress : Conductor screen, kV/mm * Insulation screen, kV/mm * Cable Characteristics : Charging current per cable, A/km * Maximum operating sheath voltage, V/km * Sheath losses at rated MVA, kW/km * Cable dielectric loss per circuit, kW/km *




7.0 DATA SCHEDULE

110 kV, 115 kV, 132 kV, 230 kV or 380 kV, LPOF POWER CABLE REFERENCE SECTION NO. DESCRIPTION 'A' 'B' 'C' Cable P.F. at Conductor Temperature

Max./Design

20°C - Max. Design * 40°C - Max. Design * 60°C - Max. Design * 85°C - Max. Design * Calculated cable positive sequence

resistance and reactance in ohms per phase per km at 60 Hz and 85°C

*

Calculated cable zero sequence resistance

and reactance in ohm per phase km at 60 Hz and 85°C

*

6.0 PACKING a. Total quantity required, m b. Are matched sets of cable reel

length required? Yes/No

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 i. Cable reel diameter, mm * j. Cable reel width, mm * OTHER REQUIRED INFORMATION a. Life expectancy of cable, years Over 30 b. 3-phase inductance in trefoil

formation, mH/km *

c. 3phase capacitance in trefoil

formation µF/km *




7.0 DATA SCHEDULE

110kV, 115 kV, 132 kV, 230 kV or 380 kV, LPOF POWER CABLE REFERENCE SECTION NO. DESCRIPTION 'A' 'B' 'C' d. Continuous current carrying capacity in

Amps per three phase circuit, single point sheath bonding, horizontal

i) Air @ 50°C * ii) Directly buried @ 40°C ground

temperature *

iii) Concrete encased duct bank * e. Details of other installation conditions

for ampacity given in item (d) above

i) Air @ 50°C * ii) Directly buried @ 40°C

*

iii) Concrete encased duct bank * f. Maximum permissible overload in %

of 3 cables in underground cable duct trefoil formation, at 40°C soil temperature, for 1/2/3 hours starting with a prior loading of

50% 75% 100%

g. Maximum pulling tension, kN *

h. Maximum sidewall pressure, kN/m * i. Overall cable diameter, mm * j. Minimum bending radius, mm *




7.0 DATA SCHEDULE

110kV, 115 kV, 132 kV, 230 kV or 380 kV, LPOF POWER CABLE

ADDITIONAL TECHNICAL INFORMATION OR FEATURES TO BE FURNISHED BY SEC:

A.

ADDITIONAL SUPPLEMENTARY DATA OR FEATURES PROPOSED BY BIDDER/VENDOR/SUPPLIER/CONTRACTOR:

B.

OTHER PARTICULARS TO BE FILLED UP BY BIDDER/VENDOR/SUPPLIER/ CONTRACTOR:

B.

Actual Manufacturer

of Equipment/Material 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

TRANSMISSION MATERIALS STANDARD SPECIFICATION 11...

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