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BD2 <strong>System</strong> — <strong>160</strong> ... 1250 A<br />
© Siemens AG 2007<br />
General data<br />
Trunking units with copper conductor<br />
Type BD2C-.-500 BD2C-.-630 BD2C-.-800 BD2C-.-1000 BD2C-.-1250<br />
Conductors<br />
Rated insulation voltage U i V AC/DC 690/800 690/800 690/800 690/800 690/800<br />
Overvoltage category/pollution degree III/3 III/3 III/3 III/3 III/3<br />
Rated operational voltage U e V AC 690 690 690 690 690<br />
Frequency Hz 50 ... 60 50 ... 60 50 ... 60 50 ... 60 50 ... 60<br />
Rated current I e = thermal rated current at<br />
A 500 630 800 1000 1250<br />
max. <strong>40</strong> °C and 35 °C on 24 h average<br />
Impedance per unit length of current paths with 50 Hz and<br />
20 °C ambient temperature (cold rails)<br />
•Resistance R 20 mΩ/m 0.113 0.113 0.050 0.050 0.032<br />
• Reactance X 20 mΩ/m 0.053 0.054 0.053 0.053 0.054<br />
• Impedance Z 20 mΩ/m 0.125 0.125 0.073 0.073 0.063<br />
Impedance per unit length of current paths with 50 Hz and<br />
20 °C ambient temperature (rail under operating conditions<br />
warm)<br />
•Resistance R 1 mΩ/m 0.136 0.151 0.065 0.068 0.041<br />
• Reactance X 1 mΩ/m 0.053 0.053 0.053 0.053 0.054<br />
• Impedance Z 1 mΩ/m 0.146 0.<strong>160</strong> 0.084 0.086 0.068<br />
Impedance of conductors under fault conditions<br />
• AC resistance per unit length R F mΩ/m 0.259 0.261 0.136 0.134 0.094<br />
• Reactance per unit length X F mΩ/m 0.218 0.222 0.226 0.227 0.229<br />
• Impedance per unit length Z F mΩ/m 0.338 0.343 0.264 0.264 0.248<br />
Zero impedance according to IEC/EN 60909 Phase to N R 0 mΩ/m 0.532 0.529 0.284 0.284 0.186<br />
(VDE 0102)<br />
X 0 mΩ/m 0.313 0.314 0.261 0.264 0.275<br />
Z 0 mΩ/m 0.617 0.615 0.386 0.388 0.332<br />
Phase to PE R 0 mΩ/m 0.473 0.470 0.258 0.270 0.174<br />
X 0 mΩ/m 0.274 0.277 0.265 0.249 0.265<br />
Z 0 mΩ/m 0.547 0.545 0.370 0.367 0.317<br />
Short-circuit strength<br />
• Rated impulse withstand current I pk kA 59 64 84 90 90<br />
• Rated short-time withstand current I cw t = 1 s kA 21 26 32 34 34<br />
t = 0.1 s kA 28 32 <strong>40</strong> 43 43<br />
Number of conductors 5 5 5 5 5<br />
Conductor cross-section L1, L2, L3 mm 2 158 158 280 418 699<br />
N mm 2 158 158 280 418 699<br />
PE mm 2 158 158 280 418 699<br />
1 / 2 PE mm 2 158 158 158 280 418<br />
5<br />
Conductor material Cu Cu Cu Cu Cu<br />
Max. interval between trunking units<br />
at normal mechanical loading<br />
•Edgewise m 4 4 3.5 3 2<br />
• Edgewise with BD2-BD 1) m 2 2 1.75 1.5 1<br />
•Flat m 3.5 3.5 3 2.5 1.5<br />
Fire load 2) kWh/m 2 2 2 2 2<br />
1) When using BD2-BD spacer bracket.<br />
2) Values for trunking units with tap-off points.<br />
For more values, see page 5/21.<br />
5/18 Siemens LV 70 · 2006
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