Wire diameter optimisation

Wire sections are determined by the maximum allowable current and the ohmic resistance.

Here the proposed diameters are automatically limited to the minimum allowable section, according to the european standards for isolated wires mounted in apparent mounting ducts.

Now for a given global loss target (at STC, i.e; maximum operating current), the best section choice is determined by the program in order to minimise:

• Either the global copper mass,
• Or the global wiring cost, provided you have defined the specific installation price of each wire section used (Wires). Please remind that the ohmic losses behave in a quadratic way with the array current (\(Ploss = R · I²\)), so that the ratio diminishes linearly with the output current. For example a 1% loss wiring at STC will produce 0.5% loss under 500 W/m2. Therefore the average wiring losses are much lower during the whole running year (about half for European climates).