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1、 71 Technical Specifications SELF SUPPORTING LV AERIAL BUNDLED CONDUCTORS(ABC)CABLE 1.SCOPE This Specification covers the design,manufacture,factory test,supply and delivery of 0.6/1 kV four-core cross-linked polyethylene(XLPE)insulated self supporting aerial bundled conductors(ABC)cable for use in
2、the construction of 230/400V,3-phase,4-wire,unigrounded,distribution systems.2.DESCRIPTION 2.1 The cable shall be suitable for use within Nepal:altitude range 0-2000 meters,typical temperature range-5 deg C to 55 deg.C,relative humidity 80-90%.2.2 The conductor shall consist of compact round strande
3、d aluminum wires.The conductor shall be insulated by extruded black cross-linked polyethylene(XLPE)material.2.3 The complete cable shall consist of four equal-size insulated conductors stranded together,and the direction of lay shall be right-hand.The type of construction shall cause the tensile loa
4、d to be shared equally between four conductors.2.4 The ABC Cable manufacturing company shall have been accredited with ISO 9001(including design in the scope of registration)quality certification.2.5 The other technical specifications of the ABC are given in Table 1:Technical Data.2.6 The outer cove
5、ring of the R phase of the cable shall be embossed with the name of the manufacturer,name of the purchaser NEA,the cross sections,type of insulation followed by ABC Cable:600/1000 Volts at the spacing of 5 meters.Every 2 meters shall also be embossed with length of the cable.3.STANDARDS 3.1 The cabl
6、e shall comply with the latest revision of UK ESI Standard 43-14:Aerial Bundled Conductors XLPE Insulated for LV Overhead Distribution,or comparable internationally recognized standards which will result in the cable of equal or better quality.4.PHASE IDENTIFICATION 71 Technical Specifications SELF
7、SUPPORTING LV AERIAL BUNDLED CONDUCTORS(ABC)CABLE 1.SCOPE This Specification covers the design,manufacture,factory test,supply and delivery of 0.6/1 kV four-core cross-linked polyethylene(XLPE)insulated self supporting aerial bundled conductors(ABC)cable for use in the construction of 230/400V,3-pha
8、se,4-wire,unigrounded,distribution systems.2.DESCRIPTION 2.1 The cable shall be suitable for use within Nepal:altitude range 0-2000 meters,typical temperature range-5 deg C to 55 deg.C,relative humidity 80-90%.2.2 The conductor shall consist of compact round stranded aluminum wires.The conductor sha
9、ll be insulated by extruded black cross-linked polyethylene(XLPE)material.2.3 The complete cable shall consist of four equal-size insulated conductors stranded together,and the direction of lay shall be right-hand.The type of construction shall cause the tensile load to be shared equally between fou
10、r conductors.2.4 The ABC Cable manufacturing company shall have been accredited with ISO 9001(including design in the scope of registration)quality certification.2.5 The other technical specifications of the ABC are given in Table 1:Technical Data.2.6 The outer covering of the R phase of the cable s
11、hall be embossed with the name of the manufacturer,name of the purchaser NEA,the cross sections,type of insulation followed by ABC Cable:600/1000 Volts at the spacing of 5 meters.Every 2 meters shall also be embossed with length of the cable.3.STANDARDS 3.1 The cable shall comply with the latest rev
12、ision of UK ESI Standard 43-14:Aerial Bundled Conductors XLPE Insulated for LV Overhead Distribution,or comparable internationally recognized standards which will result in the cable of equal or better quality.4.PHASE IDENTIFICATION 72 4.1 The identification of the conductors shall be provided by me
13、ans of ribbing on the external surface of the insulation.R,Y and B phase shall have one,two and three ribs respectively.Space between ribs in Y and B phases shall be 5 mm for 25,50 and 95 mm2.The neutral conductor shall preferably be marked with a minimum of 16 for 50mm2 and 20 for 95mm2 ribs spaced
14、 evenly around the circumference of the core.5 TESTING 5.1 The following tests shall be made on the completed cable at the manufacturers plant in accordance with governing standards:Construction tests -Verification of diameters of conductor and insulated conductor,and thickness of insulation,and so
15、on.Test on XLPE -Hot set tests -Tensile strength at break -Elongation at break -Shrinkage Mechanical tests -Breaking load test -Bending test Electrical tests -High voltage test -Conductor resistance at 20 deg C.-Insulation resistance -Spark test 5.2 The manufactured conductor shall be tested in full
16、 compliance with the governing standard and a certified type test report shall be produced for all tests conducted performed on all types of cable offered.Type test of the offered ABC cable shall have been conducted in internationally reputed testing agency.73 NEA,reserve the right to send the sampl
17、es of the manufactured ABC Cable for the type test to the internationally reputed testing laboratory to verify whether the offered cable meets the test requirements as per the referenced standard at the cost of Supplier.5.3 The manufacturer shall furnish the details of whole manufacturing process,qu
18、ality assurance plan(QAP),and list of machinery/plants for the production of ABC Cable.NEA may,at its own cost,visit the factory to verify the capability of the manufacturer to produce ABC Cable in the required quantity within stipulated time before and during the manufacturing.6.SIZE AND QUANTITY 6
19、.1 Sizes of cable shall be:4x95 mm2 4x50 mm2 4x25 mm2 6.2 The required quantity of the ABC of above sizes shall be as shown in the Price Schedule(s).7.PACKAGING 7.1 Each reel of the cable furnished shall contain only one(1)length of cable.7.2 The cable shall be supplied on non-returnable seasoned wo
20、oden drums.These shall be fully lagged and triple banded to provide adequate protection during transit.All timber shall be treated to provide protection against rot and insects;the treatment process not having deleterious effect on the cable.The drums shall accommodate a 70mm spindle.Before dispatch
21、,the end of the bundled conductors shall be sealed to prevent moisture ingress during transportation and storage.Both ends of every length of the assembled bundle shall be temporarily bound in such a manner as to prevent cores from separating.7.3 Maximum size and weight of drum(excluding lagging)sha
22、ll be:Diameter:1600mm 74 Width :1000mm Weight:1.5 MT(including cable)7.3 All reels shall be legibly marked in paint with the following information:a)Size of conductor b)Type of conductor c)Length in meters d)Net weight of conductor e)Direction of rolling 8.BID DOCUMENTATION 8.1 The BIDDER shall prov
23、ide with the Bid two(2)clear copies of the Standard governing fabrication of the conductor and two(2)clear copies of all other specifications referenced therein as relevant to the fabrication and testing LV ABC.8.2 Type test report of identical type and ratings of ABC Cables specified in the Schedul
24、e of Requirements.8.2 Drawings and Catalogues:2 set showing general construction,size and weight.8.3 The BIDDER shall provide the name and the address of the manufacturers of the cable being offered and the length of the cable in the manufacturers standard reels,including net and gross weights.8.4 D
25、etails of type tests and Quality Control procedure.8.5 All data supplied shall be bound separately from the Bid Document.75 TABLE 1 TECHNICAL DATA SELF SUPPORTING LV ABC Nominal cross sectional area,mm2 25 50 95 Number of Core 4 4 4 Form of conductor Stranded compacted circular Number of wires in co
26、nductor 7 7 19 Min.diameter of conductor,mm 5.8 8.0 11.3 Max Continuous current carrying capacity per phase,(A)105 150 225 Max.Dc resistance of conductor at 20 deg.C,Ohm/km 1.200 0.641 0.320 Min.breaking load of conductor,KN 3.5 7.0 13.3 Average thickness of insulation excluding ribs,mm 1.3 1.5 1.7 Min.thickness of insulation at any point,mm 1.07 1.25 1.43 Min.breaking load of cable,KN 14.0 28.0 53.2 Lay ratio of the cables and core As per the governing standard