NH fuse-switch disconnectors - Motor-starter combinations (MSC) - General wiring

Technical System Catalogue Ri4Power

Ri4Power NH fuse-switch disconnectors The connection cross-sections of NH fuse-switch disconnec- tors should be dimensioned in accordance with the device size and the fuse insert used, as per the following table: Table 12: Admissible rated current Inc and connection cross-section for NH fuse-switch disconnectors Max. device rated current Rated current of fuse Max. rated operating current Minimum connection Size In In1 Inc cross-section Size 00 160 A to 20 A = In1 2.5 mm2 Size 00 160 A 25 A = In1 4 mm2 Size 00 160 A 35 A = In1 6 mm2 Size 00 160 A 50 A = In1 10 mm2 Size 00 160 A 63 A = In1 16 mm2 Size 00 160 A 80 A = In1 25 mm2 Size 00 160 A 100 A = In1 35 mm2 Size 00 160 A 125 A = In1 50 mm2 Size 00 160 A 160 A = In1 70 mm2 Size 1 250 A 160 A = In1 Cf. size 00 Size 1 250 A 224 A = In1 95 mm2 Size 1 250 A 250 A = In1 120 mm2 Size 2 400 A 200 A = In1 Cf. size 00 – 1 Size 2 400 A 224 A = In1 120 mm2 Size 2 400 A 250 A = In1 120 mm2 Size 2 400 A 315 A = In1 185 mm2 Size 2 400 A 400 A = In1 240 mm2 Size 3 630 A 315 A = In1 Cf. size 00 – 2 Size 3 630 A 400 A = In1 240 mm2 Size 3 630 A 500 A = In1 2x 185 mm2 Size 3 630 A 630 A = In1 2x 240 mm2 However, this specification only applies to fuse inserts of the The maximum current of the device should not exceed 80%. type gg/gL. For other fuse types, the specifications of the In a horizontal mounting position, the NH devices should only fuse manufacturers should additionally be observed. be used as fuse holders and must not be used as switch- gear. This should be labelled e.g. with a sticker (Do not open The rated current of the fuses is used for dimensioning the under load). cross-sections. Additionally, the next largest cable cross- section is used. From 63 A, the temperature resistance of the cables should be 105 °C. Motor-starter combinations (MSC) Wiring for auxiliary circuits General wiring should be selected in conformity with Wiring of the main circuit Annex H of IEC 61 439-1. The type of wiring must withstand The cross-sections of the main circuit should always be a maximum temperature of 60 °C if the plate is in an area dimensioned one cross-section step larger than that cal- with a maximum ambient temperature of 35 °C. If the ambi- culated on the basis of rated current. If the switchgear ent temperature is higher, the insulation material must meet manufacturer requires a larger cross-section, this should a higher temperature resistance. be followed. The insulation of the conductor material of the main circuits must be designed for an overtemperature of 70 K. General wiring General wiring should be selected in conformity with Annex H of IEC 61 439-1. Rittal Technical System Catalogue/Power distribution 60


Technical System Catalogue Ri4Power
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