ITEM

DESCRIPTION

ESCOM SPECIFICATION

1

Reference Specification Standard

BS 2627, IEC 60502,

2

General Characteristics

2 (a)

Conductor code name

H68 ALUMINIUM

2 (b)

Phase conductor size

95 mm²

2 (c)

AAAC Neutral/Messenger size

70 mm²

Phase conductor parameters

(ii) Number of Strands

19

(iii) Strand Diameter

2.52 mm

Neutral conductor parameters

(ii) Number of Strands

7

(iii) Strand Diameter

3.568mm

2 (d)

Mass of conductor

920 Kg/km

2 (e)

Conductor shall be greased

N/A

2 (f)

The grease shall be Lithium Base Grease, Type A of EN 50326 having minimum drop point of 150⁰C

N/A

2 (g)

Mass of grease

N/A

2 (h)

Mass of conductor with grease

N/A

3

Mechanical Characteristics

3 (a)   

Ultimate breaking load, min. (Phase)

8.4 KN          

3 (b)

Ultimate breaking load, min. (Neutral)

16.6 kN

3 (c)

Max. working stress (Phase)

157 N/mm²    

3 (d)

Max. working stress (Neutral)

156 N/mm²    

3 (e)

EDS (25⁰C, still air)-Phase

31.4 N/mm²

3 (f)

EDS (25⁰C, still air)-Neutral

31.2 N/mm²

3 (g)

Modulus of elasticity-Phase

57 kN/mm²

3 (h)

Modulus of elasticity-Neutral

60 kN/mm²

3 (i)

Thermal expansion coefficient

0.0000230 1/⁰C

4

Electrical Characteristics

4 (a)

Nominal system voltage

0.6kV

4 (b)

Highest system voltage

1 KV

4 (c )

Power supply frequency

50 Hz

4 (d)

Current rating in air

205 A

4 (e )

DC resistance at 20⁰C, max Phase

0.443 Ohm/km

4 (f)

DC resistance at 20⁰C, max Neutral

0.693 Ohm/km

5

Insulation

5 (a)

Insulation Material

Extruded Polyethylene

5 (b)

Insulation Colour

Black

5 (c )

Insulation thickness

 Specify

5 (d)

Phase conductor

1.8mm

5 (e )

Neutral conductor

1.6mm

5 (f)

Insulation core diameters

 Specify

5 (g)

Phase conductor diameter

15.31 mm

5 (h)

Neutral conductor diameter

10.7mm

6

Site Conditions

6 (a)

Altitude

Up to 1800 m

6 (b)

Ambient temperature

40 ⁰C

6 (c )

Intensity of Solar Radiation

5.9 kW/m2

6 (d)

Wind speed

3.0 m/s

6 (e )

IEC Pollution Level

LM (Low to Medium)

7

Manuals & Drawings

7 (a)

Language

English

7 (b)

Number of copies

2

7 (c)

Drawings with full details

Yes. Reference number(s)

8

Test Result Certificates

8 (a)

Provide Routine and Type test results certificate in English with bid

Yes. Reference number(s)

9

Identification & Marking

9 (a)

Provide drawing in English indicating the position of the identification rating plate and marking. Marking details to include manufacturers name & trademark, model & serial number, year of manufacture, rated voltage, current ratings, insulation levels, frequency, specification standard, gross Mass

Yes. Reference number(s)

10

Authorisation, Quality assurance & origin

10 (a)

Provide manufacturer's authorisation letter with bid

Yes

10 (b)

Provide production quality assurance certificate with bid

Yes

10 (c)

Country of origin

Yes

Material

Material: All Aluminum Conductor

AAC

Core

Number of cores

2

Size

Nominal cross-section area of aluminum conductor per core            

       16 mm2

Approximate overall diameter of un-covered conductor per core      

       5.1 mm

Strands

Number of aluminium strands

7

Nominal diameter of each strand                                                             

      1.7 mm

Weight

Approximate weight of conductor                                                           

         80g/m

CBL

  Calculated breaking load                                                                           

      2.827kN

Resistance

Maximum DC resistance of conductor at 20℃                                       

  1.813Ohm/km

Density

Aluminium wire density

2.703kg/dm3

Expansion

Coefficient of linear expansion per℃ 

2.3 E-05

Temperature

Temperature coefficient per degree Celsius

0.00403

Tensile Strength

Single Wire Tensile Strength after Stranding

≥ 152 MPa

Resistivity

Resistivity at 20℃ 

≤ 28.264 Ωm

Insulation

Insulation material

PVC

Insulation Color

Black

Minimum insulation thickness at any point

0.8mm

Approximate overall diameter of covered conductor

-

Construction

Twin bundled with ribbed neutral for identification

-

Installation

Suitable for aerial distribution service drop wire

-