Page 354 - 3rd issue

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Electrical and transmission characteristics

1- Conductor resistance at 20O C

Nominal Copper conductor diameter Max. Resistance
mm mm ohm/Km
0.4 Minimum 0.425
0.5 mm 0.525 149
0.6 0.385 0.625 93
0.9 0.485 0.925 64.5
0.585 28
0.885

2- Resistance unbalance
Resistance unbalance shall be calculated with the following formula

R ( %) = R max - Rmin X 100 Resistance unbalance %
CRonmduacxtor+diaRmin
Minimum Max.
mm mm mm
5
0.4 2 5
4
0.5 1.5 4

0.6 1.5

0.9 1.2

3- The tensile strength of conductor is max 26 Kg/mm2

and min 20 Kg/mm2

3- Insulation Resistance

The Insulation Resistance at 20 OC is the following
Min. 10000 Mega ohm km for foam skin insulation

Min. 5000 Mega ohm km for solid insulation

4- Mutual Capacitance at 800 HZ
Max average 45 ± 5 nf/km

Max average 50 nf/km

5- Capacitance unbalance Pair
For 160 meter at 800 HZ to earth
Max avarage 500 PF/km
Max individual 2500 PF/km

Max capacitance unbalance

Kind of Reading Avarage Individual

Side to side (within star quad) 70 300
Side to earth 200 450
150
Side to side adjacent pairs -

N.B.: Intermediate and other sizes are produced upon request

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