35 Figure 13 Ratio rMLR II / of low-voltage and medium-voltage asynchronous motors, 50 Hz and 60 Hz. 35 Figure 12 Reduction factor depending on the inducing current for cables with three lead sheaths and two overlapping steel tapes, f = 50 Hz. 23 Figure 11 Reduction factor depending on the inducing current for cables with one lead sheath and two overlapping steel tapes, f = 50 Hz. 20 Figure 10 Single-core cable 64 kV / 110 kV with lead sheath. )1( XX = of overhead lines 50 Hz (60 Hz-values converted to 50 Hz). )1( XX = of low-voltage and medium-voltage overhead lines 50 Hz, Cu or Al, with one circuit according to Equation (15) of IEC 60909-0. 13 Figure 6 Rated short-circuit voltages ukr of network transformers. 12 Figure 5 Rated short-circuit voltage ukr of unit transformers in power stations (ST) with or without on-load tap-changer. 9 Figure 3 Unsaturated and saturated synchronous reactance of two-pole turbo generators 50 Hz and 60 Hz (relative values).9 Figure 4 Three-winding transformer (No. 8 Figure 2 Rated Voltage rGU and rated power factor rGcos of synchronous machines (Turbo generators, salient pole generators, motors and condensers 50 Hz and 60 Hz). 43 Figure 1 Subtransient reactance of synchronous machines 50 Hz and 60 Hz (Turbogenerators, salient pole generators, motors SM and condensers SC). 35 2.7 Busbars.38Īnnex A (informative) Information from National Committees. 20 2.6 Data of typical asynchronous motors. 14 2.5 Data of typical high-voltage, medium-voltage and low-voltage cables. 10 2.4 Data of typical overhead lines, single and double circuits. 6 2.2 Data of typical synchronous machines.7 2.3 Data of typical two-winding, three-winding and auto-transformers. 6ġ.1 Scope and object.6 1.2 Normative references.
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THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2008 IEC, Geneva, Switzerland All rights reserved. systems Part 2: Data of electrical equipment for short-circuit current calculationsĭit document is een voorbeeld van NEN / This document is a preview by NEN Short-circuit currents in three-phase a.c.
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