Ri4Power Notes on the positioning and design of N, For dimensioning of the minimum cross-section of the PE PE and PEN conductors conductor or PEN conductor for the PE conductor function, we would refer you to chapter 5.3.1. N, PE and PE conductors are to be dimensioned in accordance with IEC/EN 61 439-2. The PE/PEN system solutions offered by Rittal have been tested as follows: Table 15: Selection of PE/PEN conductors on the basis of rated short-term withstand current Busbar cross-section Test values cwFor rated short-term withstand current I of the main busbar system E-Cu 30 x 5 mm 18 kA, 1 sec. 30 kA, 1 sec. E-Cu 30 x 10 mm 30 kA, 1 sec. 50 kA, 1 sec. E-Cu 40 x 10 mm 42 kA, 1 sec. 70 kA, 1 sec. E-Cu 80 x 10 mm 60 kA, 1 sec. 100 kA, 1 sec. Maxi-PLS 1600 60 kA, 1 sec. 65 kA, 1 sec. Maxi-PLS 2000 60 kA, 1 sec. 70 kA, 1 sec. Maxi-PLS 3200 60 kA, 1 sec. 100 kA, 1 sec. Additionally, when dimensioning the PEN conductor, it should These regulations should be applied for all internal con- be noted that the minimum cross-section must also satisfy ductors in a switchgear. the requirement for the N function. However, they only apply under the assumption that the Dimensioning of the neutral conductor or the neutral conduc- current of the neutral conductor is no more than 50% of the tor function of the PEN conductor depends on the antici- phase conductor current. For higher currents on the neutral pated load and should be agreed between the user and the conductor or high harmonic contents, the cross-sections manufacturer. If no specifications have been made by the should be defined correspondingly higher. user in this connection, the following regulations should be The PE, PEN and N conductors should be fitted in accord- used for the minimum cross-section in accordance with ance with the position shown in the Ri4Power assembly IEC/EN 61 439-1, chapter 8.6.1. instructions. In circuits with a phase conductor cross-section up to and including 16 mm2, the neutral conductor should be designed with the same cross-section (100% of the phase conductor cross-section). In circuits with a phase conductor cross-section of more than 16 mm2, the neutral conductor should be designed with half the cross-section (50% of the phase conductor cross-sec- tion), but with a minimum cross-section of 16 mm2. PE bar version, flat copper bar, horizontal PE bar version, flat copper bar, upright PE bar version with Flat-PLS PE bar version with Maxi-PLS Rittal Technical System Catalogue/Power distribution 64
Technical System Catalogue Ri4Power
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