Spesification - Sør-Norge Aluminium AS
Spesification - Sør-Norge Aluminium AS
Spesification - Sør-Norge Aluminium AS
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<strong>Spesification</strong><br />
Attachment 2.<br />
Supplementary explanation of drawing number 18908.<br />
A. Transformer – secondary zero point is connected to ground (TN system).<br />
B. Between the main distribution and the first distribution the same conductor shall be used as N and<br />
PE conductor (TN-C system). I.e. 3-conductor cable with cross section in accordance with<br />
regulations on PEN conductor (diagram).<br />
C. Ground point in the first distribution shall always be connected locally to the purchaser’s internal<br />
grounding grid.<br />
D. After the first distribution, the PE and N conductors shall always be kept separate (TN-S system).<br />
I.e. 4-conductor cable with a cross section in accordance with regulations on PE conductor<br />
(diagram).<br />
E. If the distance to the next distribution exceeds 100 m, this shall also be connected to the grounding<br />
grid.<br />
F. Circuit for 3 phase load with PE. 3-conductor cable with cross section in accordance with<br />
regulations on PE conductor (diagram) must be used.<br />
G. (G,H,I) circuit for 3 phase load with loaded N conductor. 4-conductor cable with a cross section in<br />
accordance with regulations on PE conductor (shielded) must be used. 1 phase circuit with PE<br />
230V between L1 and N. Control current transformer with ground fault indicator shall be used<br />
when there is the need for control current.<br />
2.3 Electro technical specification rev 8.1 Side 25 av 35
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