47www.se.com1. Identify the external influencesThe ambient temperature, presence of dust, condensation of water, etc. contribute to the definition of the degree of protection required in the area where the lines will be installed.Canalis KB has a degree of protection IP55 and is sprinkler resistant. It has a mechanical resistance IK06. As per the requirement of the IEC 61439-6 the operating ratings are given for an ambient temperature of 35°C.2. Identify the determinant dataL = Length of the line (m)D = Distance between each lightings (m)P = Power of lightings (W)F = Power factor of lightings (Cos φ)W = Weight of lighting (kg)N = Number of lightings per lineV = Voltage (Volt)3. Determine the maximun current carrier by the busbartrunking in operationN = Number of lightings per line = (L/D) - 1Max current = N x P / F / VExample:L = 95 mD = 3 mP = 80 WF = 0.8V = 230 Volt (L+N)N = (95/3) -1 = 31 - 1 = 30Max current = 30 x 80 / 0.8 / 230 = 13.04 AThe just above available rating is 25 A.4. Check if the voltage drop is below 3 %Use data pages 44 and 45 to determine the charactaristics of Canalis KBA 25 A and Canalis KBB 25 A.Canalis KBA 25 A:Voltage drop per 100 m / A for a power factor 0.8 = 0.61Voltage for 95 m: 0.61 x 13.04 x 0.95 = 7.55 VVoltage drop in %: 7.55 / 230 = 3.2 %The voltage drop is too high, the line length need to be reduced or a superior rating need to be selected.Examples of calculation are available page 46.5. Select the adapted overload and short-circuit protectionSee page 48 to page 51.6. Selected the most adapted product to support the lighting weightSee page 52.Design guideProcedure to select Canalis KB Ph + N distribution 3Ph + N balanced distributionE
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