| TECHNICAL SPECIFICATION /B>FOR
Submarine Power Cable
1. GENERAL
This listed specification covers the structure and performance of Submarine Power Cable as manufactured by one of our famous producers from China.
Matters not mentioned in this technical specification shall be negotiated by purchaser & supplier. This document confirms the two parties agreement as technical agreement of contract unless otherwise in official written annexes.
2. REFERENT STANDARDS
The cable which ZTT offered shall be designed, manufactured and tested according
to international standards as follows:
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ISO 9001 |
Quality Management Systems |
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ISO 14001 |
Environmental Management Systems |
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IEC 60228-2004 |
Conductors of insulated cables |
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IEC 60502-2-2005 |
Cables for rated voltages from 6 kV (Um = 7,2 kV) up to 30 kV (Um = 36 kV) |
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IEC 60287-1-1-2001 |
Electric cables �?Calculation of current rating Part 1: Current rating equations (100 % load factor) and calculation of losses |
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IEC 60287-2-1-2001 |
Electric cables �?Calculation of the current rating �?Part 2-1: Thermal resistance - Calculation of thermal resistance |
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IEC 60811-1-1-2001 |
Common test methods for insulating and sheathing materials of electric cables - Part 1: Methods for general application - Section 1: Measurement of thickness and overall dimensions - Tests for determining the mechanical properties |
|
IEC 60840-2004 |
Tests for power cables with extruded insulation for rated voltages above 30 kV (Um = 36 kV) up to 150 kV (Um = 170 kV) |
3. SUBMARINE OPTICAL FIBER POWER CABLE
Cable design
Conductor
The conductor shall be circular, stranded, compact annealed copper conductor
according to IEC 60228 Class 2. The number of wires stranded is not less than 36.
Conductor screen
The conductor screen consist of an extruded layer of semi-conductive compound
Insulation
The insulation consists of a extruded layer of cross-linked polyethylene (XLPE).
Insulation screen
The insulation screen consist of an extruded layer of semi-conductive compound
Water-blocking tape
The water-blocking tape is covered on each phase conductor and consists of
water-blocking swelling tape.
Alloy lead sheath
Alloy lead sheath is extruded on each individual phase conductor for water-blocking
and carrying single phase to earth fault current.
PE sheath
A semi-conducting PE-sheath is applied on each conductor for improving the
mechanical properties of the lead-sheath.
Lay-up of conductor
Three conductors and fiber unit are stranded with polypropylene yarn fillers. And two
layers of tape is lapped over the assembly.
Rubber tissue bedding
A layer of rubber tissue bedding is applied on the laid-up conductor.
Armor
The armor consists of round, galvanized steel wires embedded with bitumen.
Outer sheath
The sheath consists of polypropylene yarns with bitumen compound.
Structure and Dimension
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1 |
Conductor |
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|
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Material Cross section |
Copper 300 mm2 |
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Number of core |
3 |
|
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Diameter over conductor |
20.6 mm |
|
2 |
Conductor screen |
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|
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Material Nominal thickness |
Semi-conductive compound 0.8 mm |
|
|
Diameter over conductor screen |
22.2 mm |
|
3 |
Insulation |
|
|
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Material |
XLPE |
|
|
Nominal thickness |
5.5 mm |
|
|
Diameter over conductor screen |
33.2 mm |
|
4 |
Insulation screen |
|
|
|
Material Nominal thickness |
Semi-conductive compound 1.0 mm |
|
|
Diameter over conductor screen |
35.2 mm |
|
5 |
Water-blocking tape Nominal thickness |
0.5 mm |
|
|
Diameter over water-blocking tape |
36.2 mm |
|
6 |
Alloy lead sheath Nominal thickness |
1.8 mm |
|
|
Diameter over alloy lead sheath |
39.8 mm |
|
7 |
Bitumen |
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|
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Nominal thickness |
0.1 mm |
|
|
Diameter over Bitumen |
40.0 mm |
|
8 |
PE sheath |
|
|
|
Nominal thickness |
2.2 mm |
|
|
Diameter over PE sheath |
44.4 mm |
|
9 |
Diameter over laid-up conductor |
96.3 mm |
|
10 |
Rubber tissue bedding Nominal thickness |
2.1 mm |
|
|
Diameter over rubber tissue bedding |
100.5 mm |
|
11 |
Steel wire armor |
|
|
|
Nominal diameter of steel wire |
6.0 mm |
|
|
Number of steel wire |
53 |
|
|
Diameter over steel wire armor |
112.5 mm |
|
12 |
Outer sheath |
|
|
|
Nominal thickness |
3.1 mm |
|
|
Overall diameter of cable |
118.7 mm |
|
13 |
Cable weight |
33870 kg/km |
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Dear sir,
Here is the quotation on your submarine cable, which are designed to our experience and your preliminary data.
According to our calculation, we suggest 3*300 submarine with single length of 3.5km, and total net weight is of around 120 tons. The 3*240 can not meet the demand in both DC resistance and short circuit current data.
Quotation: Ex-manufacturer’s submarine cable port is 171666.67 USD/KM, quantity is 3.5km, so total is 600833.33USD, packing is not included.
Transportation:
Way 1.buyer’s cable paving ship moves to our factory submarine cable port, and then we will load the submarine cable to buyer’s paving ship.
Way 2: we supply a steel drum with capacity of holding 120 tons, outer diameter is 8.5 meter, inner diameter is 6 meter, height is 2 meter, the drum cost about 55000 USD. Buyer can load the drum with wired submarine cable and ship to Shanghai port to load on the large ship to destination.
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For more about our power cable, submarine cable, OPGW fiberglass cable, please click. |
China National
Electric Wire&Cable Imp./Exp. Corp
