Catalog LV 70 2011 - Low & Medium Voltage - Siemens

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BD2 System — 160 ... 1250 A © Siemens AG 2011 Configuration information Installation plan c 5 6 3 Explanations for the installation plan $ End feeder unit % Trunking unit, optional length 1.5 m, with fire barrier & Trunking unit, standard length 2.25 m ( Trunking unit, optional length 1.0 m, with fire barrier ) End flange * Vertical retaining elements + Fixing bracket , Spacer bracket - Tap-off unit 4 a M a Position of fire barrier in m; center of fire barrier is always at center of fire ceiling b Dimension for spacer bracket in m c Dimension for retaining element in m M Ceiling thickness in m 9 7 8 3 Fixing elements: • Second retaining element at approx. 5 m height (always near the terminal) • Third retaining element at approx. 10 m height • Fourth retaining element at approx. 15 m height Note The fixing points for all fixing brackets, retaining elements and spacer brackets must be specified in the installation plan. M b 3,25 m 2 3,10 m 9 a 6 5 NSV0_00188 1 5/86 Siemens LV 70 · 04/2011
© Siemens AG 2011 BD2 System — 160 ... 1250 A ■ More information Rated currents and short-circuit currents of standard transformers Configuration information Rated voltage U N 400/230 V 690/400 V Relative short-circuit voltage u k 4% 1) 6% 2) 4% 1) 6% 2) Rated power Rated current Short-circuit current I" 3) k Rated current Short-circuit current I" 3) k kVA A A A A A A 50 72 1805 – 42 1042 – 100 144 3610 2406 84 2084 1392 160 230 5776 3850 133 3325 2230 200 288 7220 4812 168 4168 2784 250 360 9025 6015 210 5220 3560 315 455 11375 7583 263 6650 4380 400 578 14450 9630 336 8336 5568 500 722 18050 12030 420 10440 7120 630 909 22750 15166 526 13300 8760 800 1156 28900 19260 672 16672 11136 1000 1444 36100 24060 840 20840 13920 1250 1805 45125 30080 1050 26060 17480 1) u k = 4 %, standardized according to DIN 42500 for S NT = 50 ... 630 kVA. 2) u k = 6 %, standardized according to DIN 42500 for S NT = 100 ... 1600 kVA. 3) I" k = Transformer initial short-circuit alternating current when connecting to a network with unlimited short-circuit power. Approximating formula Transformer rated current Transformer short-circuit alternating current with I N [A] = k × S NT [kVA] I" k = I N /u k × 100 k = 1.45 at 400 V k = 0.84 at 690 V Dimensioning and selection Safe shutoff of the smallest single-pole ground short-circuit current Since the level of the loop impedance is decisive in determining the level of the single-pole short-circuit current, DIN VDE 0100 Part 600 prescribes that the loop impedance must be determined between the following: • Phase conductor and the protective conductor or • Phase conductor and PEN conductor. This value may be determined by: • Measuring with measuring devices or • Calculation or • Simulation of the network in a network model. In the "Technical Specifications" section, the impedance values for the BD2A/BD2C busbar trunking systems are listed so that it is possible to calculate the loop impedances of a busbar system, which contributes to the total loop impedance. With the aid of the loop impedance of the entire busbar trunking system, it is easy to calculate the smallest expected single-pole short-circuit current. I kl min = c × U n √3 × Z k with c = Voltage factor 0.95 U n = Voltage between the phase conductors Z k = Short-circuit impedance 5 Siemens LV 70 · 04/2011 5/87
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© Siemens AG 2011 SIVACON 8PS Busb
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Introduction © Siemens AG 2011 1 1
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© Siemens AG 2011 Answers for infr
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© Siemens AG 2011 Consistent, safe
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© Siemens AG 2011 The ideal system
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© Siemens AG 2011 Our added extra
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© Siemens AG 2011 Busbar Trunking
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© Siemens AG 2011 Appendix Standar
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© Siemens AG 2011 Appendix Siemens
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© Siemens AG 2011 Appendix Service
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© Siemens AG 2011 Appendix Subject
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© Siemens AG 2011 Catalogs Industr
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Catalog LV 70 2011 - Low & Medium Voltage - Siemens

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