Catalog LV 70 2011 - Low & Medium Voltage - Siemens

© Siemens AG 2011
BD01 System — 40 ... 160 A
Configuration information
Voltage drop
Voltage drop at rated current
(Load distribution factor a = 1)
U (V/100 m)
30
28
26
24
22
20
18
16
14
12
10
0,4 0,5 0,6 0,7 0,8 0,9
40 A
63 A
125 A
160 A
100 A
Calculation of the voltage drop
For long busbar lines, it may be necessary to calculate the
voltage drop.
cos
1
NSV0_00070
Fire barrier
General requirements
The German state building authorities demand that buildings are
designed so that "spreading of fire and smoke is prevented, and
that effective fire fighting and rescue of persons and domestic
animals is facilitated". Fire or flue gas may not spread from one
storey or fire area to another.
All BD01 busbar trunking systems can be equipped with a fire
barrier and generally comply with the standards for buildings including
high-rise buildings.
The fire resistance rating corresponds to S 90 according to
DIN 4102 Part 9. The demands for verification of the fire resistance
duration of 90 min according to ISO 834 as required by
IEC/EN 60439-2 are fulfilled.
Configuration
To ensure a fire barrier according to S90, the following points
must be observed when configuring and installing trunking units
with fire barriers:
• The center of the fire barrier in the trunking unit must be positioned
in the center of the fire wall.
• There are no tap-off points in the area covered by the fire
barrier.
• The trunking units must be installed by an approved fire
barrier installation specialist.
• Fire barriers for installation in lightweight walls are available on
request.
NSV0_01462
1
4
ΔU = a ×√3 × I B × l × (R × cos ϕ + X × sin ϕ) × 10 –3
(V)
with
ΔU = Voltage drop (V)
I B = Operational current (A)
l = Length (m)
a = Load distribution factor see Table
R = Ohmic resistance R 20 (mΩ/m)
X = Inductive resistance X 20 (mΩ/m)
cos ϕ = Power factor (p.f.)
Factor a used in the equation for calculating the voltage drop is
dependent on the load distribution.
Load distribution
A
A
A
B
B
B
D
C
C
A
A
D
D
E
E
B
E
C
C
F
B
Factor a
Infeed at A,
one outgoing feeder at B 1
Infeed at A,
outgoing feeders at B, C, D, E 0.5
Infeed at A,
outgoing feeders at B, C 0.25
Infeed at A,
outgoing feeders at B, C, D, E 0.125
Infeed at A, B,
outgoing feeders at C, D, E, F 0.25
1 Packing
140
650
Positioning in the fire wall
Observe the following when installing the trunking units:
• Mounting of the fire barrier part on the busbar trunking system
element (see pages 4/28 and 4/46).
• The space $ surrounding the busbar trunking unit within the
component it passes through must be packed with mineralbased
mortar or fire barrier sealant.
• The mortar or fire barrier sealant must conform to the applicable
regulations for establishing fire resistance rating or the
construction of the wall or ceiling.
• The installation must be carried out according to pertinent
building regulations. The approval papers can be ordered
separately.
Siemens LV 70 · 04/2011
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