Transcript Separation Distance - Paratoner, Yıldırımdan Korunma

Separation Distance
© 2012 DEHN + SÖHNE / protected by ISO 16016
Separation Distance
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Proximity between
the telecommunication line and the down conductor
Telecommunication line
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Separation Distance
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Faulty installation
Separation distance?
s?
s?
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Separation Distance
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Separation distance s
Problematic installation of metal lines
s
e.g. e.g. electric line
l
Ref.: IEC 62305-3:2006; Annex E, Figure E.38
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Separation Distance
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06.10.09 / S6047e
Electrical insulation of the external LPS
IEC 62305-3:2006, 6.3
“The electrical insulation between the air-termination or the downconductor and the structural metal parts, the metal installations and the
internal systems can be achieved by providing a distance d between the
parts greater than the separation distance s‘:
s = ki 
kc

km
ki
kc

l
© 2012 DEHN + SÖHNE / protected by ISO 16016
km
l
depends on the selected class of LPS (see Table 10);
depends on the lightning current flowing on the down
conductors (see Table 11);
depends on the electrical insulation material
(see Table 12);
is the length, in metres, along the air-termination or
the down-conductor, from the point where the
separation distance is to be considered, to the nearest
equipotential bonding point.“
Separation Distance
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Insulation of the external LPS
Values of coefficients ki and km
Class of LPS
ki
I
0.08
II
0.06
III and IV
0.04
Material
km
Air
1
Concrete, bricks
0.5
DEHNiso* spacer / Combi
0.7
NOTE 1
When there are several insulating materials in series, it is good practice to use
the lower value for km.
NOTE 2
The use of other insulating materials is under consideration .
Ref.: IEC 62305-3:2006, 6.3, Table 10 + 12 *DEHNiso value stated by DEHN + SÖHNE (Dr. Zischank VAZ)
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Separation Distance
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Separation distance
Coefficient kc for an air-termination rod
kc = 1
Individual airtermination rod
S
Ref.: IEC 62305-3:2006, Annex C, Figure C.1
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Separation Distance
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Formulas for the calculation of the
partitioning coefficient kc
Formula for the calculation of the partitioning coefficient kc
in case of two down conductors and a type B earth-termination system
h+c
kc = ————
2h + c
Basic formula for the calculation of the partitioning coefficient kc
1
3 c

kc = 
+ 0,1 + 0,2


2 n
h
Legend:
n Total number of down conductors
c Distance of a down conductor to the next down conductor
h Spacing (or height) between ring conductors
Ref.: IEC 62305-3:2006, Annex C, Figure C.2
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Separation Distance
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Formulas for the calculation of the
partitioning coefficient kc
National specification for the partitioning coefficient kc
for buildings with “meshed“ air-termination system
From the point of proximity to the 1st node kc1 = 1
From the 1st node to the next node
• in case of two outgoing lines
• in case of three outgoing lines
• in case of four outgoing lines
kc2 = 0.5
kc2 = 0.33
kc2 = 0.25
Every further node reduces the kc value* by half
* NOTE: The value should not be smaller than
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1
n
Separation Distance
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Calculation example of the separation distance s
Building with gable roof, class of LPS III
Calculation according to IEC 62305-3
c = 14 m
Number of down conductors: 4
l = 12 m
1
c
h = 6 m kc = 
+ 0.1 + 0.2  3 
2 n
h
8m
© 2012 DEHN + SÖHNE / protected by ISO 16016
Separation Distance
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Calculation example of the separation distance s
Building with gable roof, class of LPS III
Calculation of kc according to IEC 62305-3
n =4
Total number of
down conductors
h =6m
Height or spacing
of the ring conductors,
gutter
c = 14 m Max. distance between
two down conductors
1
c
3 
kc = 
+
0.1
+
0.2
2 n
h
1
3 14

kc =  + 0.1 + 0.2
 = 0.490

2 4
6
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Separation Distance
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Calculation example of the separation distance s
Building with gable roof, class of LPS III
Calculation of s according to IEC 62305-3
kc
s = ki 
km
Coefficient class of LPS III:
ki = 0.04
Partitioning coefficient:
kc = 0.490
Material used for the isolating distance
Brick:
km = 0.5

l (m)
0.490
s = 0.04
0.5
© 2012 DEHN + SÖHNE / protected by ISO 16016

Length along the air-termination
conductor / down conductor:
l = 12 m
12 m = 0.47 m
Separation Distance
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Calculation example of the separation distance s
Building with gable roof, class of LPS III
Calculation of s according to
IEC 62305-3
Number of down conductors: 4
• Lamp
• Conductors
• Heating
• Water ...
0.490
s = 0.04
0.5
l = 17 m

17 m = 0.66 m
14 m
8m
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Separation Distance
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Separation distance - Example 2.2 km = solid material
Air-term. rod connected twice to the mesh network
Roof superstructure
h = 2m
s = ki (kc1  l1 + kc2  l2 + ... + kcn  ln) / km =
s = 0.06 (0,5 8m + 0.25 4m + 0.125 10m + 0.063 10m + 0.042  8m) / 0.5 =
s = 0.87m for solid material
Air-termination rod
kc6=0.042 kc5=0.063 kc4=0.125
l6 = 8 m l5 = 10 m l4 = 10 m
kc3= 0.25
l3 = 4 m
Roof superstructure
kc2= 0.5
l2 = 8 m
l=10m
s
kc2= 0.5
l2 = 8 m
20 m
Class of LPS II
Height of the building h /
length l to the earth-termination
system: l = 8m
Mesh size: 10m x 10m
Number of down cond.: n = 24
Min. value for kc:
1 = 1 = 0.042
n
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Separation Distance
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Separation Distance
Calculation according to
Nodal Analysis
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Nodal analysis - Software for the determination of the
separation distance s
I
Every line is shown as a resistor.
The voltages of the nodes, i.e. the
difference between the node
potentials, are calculated by means of
the supply of a defined lightning
current and the mathematical solution
of the equation.
R1
R2
R6
R3
R7
R8
R4
R9
R10
R11
R12
R14
R15
R16
R17
0V
0V
0V
0V
= node
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R5
Separation Distance
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R13
Model for the determination of current division
Nodal analysis
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Separation Distance
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Spearartion distance
calculated according to
nodal analysis
DEHN Distance Tool
Start software
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Separation Distance
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DEHNconductor
HVI® Conductor
Technology
Fields of Application
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Basic development of a creepage discharge at the
HVI conductor with special coating
Inner conductor
Insulation, semiconducting
EB connection via
earthing clamp
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Separation Distance
Proximity to
earthed metal parts
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Coaxial Cables with Field Control and
Conductive Shield as insulated Down-conductors
Connection with
the air termination
Field control
Conductive shield
(e.g. braided copper)
Induction of the
lightning current
(feeding point)
conductor
HV-Insulation
External coating
(weather and UV resistant)
© 2012 DEHN + SÖHNE / protected by ISO 16016
HVI-Seminar HVI-Leitungen
Basic illustration of the structure of an isolated down
conductor with semiconductive coating
connection to the
air-termination system
sealing unit area
incoming lightning
impulse current
inner
conductor
semihigh-voltage
resistant isolation conductive
coating
Lit.:
© 2012 DEHN + SÖHNE / protected by ISO 16016
HVI-Seminar HVI-Leitungen
connection to
equipotential
bonding
11.12.03 / 3465
DEHNconductor system, HVI® conductor I
Head piece
Fixed EB element
Earth connection
HVI conductor I Part No. 819 020
Conductor holder Part No. 275 120
EB clamp Part No. 405 020
Conductor length has to be specified
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Earth connection element (removable)
Separation Distance
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Installation of the different types of HVI® conductors
HVI® conductor type I
HVI® conductor type II
EB connection
Sealing end
EB
connection
EB connection
Sealing end
HVI® conductor II,
fixed length,
secong sealing end
fixed
© 2012 DEHN + SÖHNE / protected by ISO 16016
HVI® conductor type III
Separation Distance
Sealing end
HVI® conductor III,
can be cut to length,
second sealing end
has to be mounted
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Isolate air-termination system for mobile radio stations
DEHNconductor system HVI® conductor
No metal parts may be
installed in the sealing
end section!
Air-termination tip
GRP supporting tube
EB element
HVI® conductor
Aluminium
supporting tube
Source: Bischof-Blitzschutz, Weyhe
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Separation Distance
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Grey HVI® conductor installed in the supporting tube
with integrated sealing end and air-termination tip
Air-termination rod
HVI® conductor I
Part No. 819 323
HVI® conductor II
Part No. 819 324
GRP supporting tube
Aluminium supporting
tube
HVI® conductor III
Part No. 819 325
© 2012 DEHN + SÖHNE / protected by ISO 16016
HVI conductor
Separation Distance
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Voltage-controlled insulated down conductor
Separation distance is maintained
a
Isolated airtermination system
Metal roof
superstructure
metal capping of the
parapet located
the protection area of
Equipotential bonding in
an isolated airconnection
termination system is
connected to
equipotential bonding
Sealing end
Insulated HVI® conductor I
Reinforcement
Separation distance s
Cable duct
Equivalent separation distance
of the HVI conductor:
s = 0.75 m in air
s = 1.50 m for solid material
Cable duct
Foundation earth electrode
© 2012 DEHN + SÖHNE / protected by ISO 16016
Separation Distance
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Isolated Lightning Protection
Air-Termination Masts and HVI Conductor Light
© 2012 DEHN + SÖHNE / protected by ISO 16016
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DEHNconductor system / HVI® conductor light
HVI conductor light
Prerequisite for the use of
HVI conductors light:
Separation distance  0.45 m (in air)
Disposable reel
made of plywood
(Ø approx. 80 cm),
width approx. 50 cm
Total weight
approx. 66 kg
Equiv. separ. distance s  0.45 m (in air)
 0.90 m
(solid material)
Core
Copper (soft)
Cross-section
19 mm²
Insulation
PE (polyethylene)
Outer diameter
20 mm
(black sheath 17 mm)
Colour
Dark grey
Length 100 m on a reel: Part No. 819 125
© 2012 DEHN + SÖHNE / protected by ISO 16016
Separation Distance
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Isolated lightning protection system
HVI conductor light, class of LPS III
Detail A
air-termination mast
Detail A
air-termination mast
HVI conductor light
15 m
30 m
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Separation Distance
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Isolated lightning protection system
HVI conductor light, class of LPS III
1.5 m
1.90 m
27 m
Protection area
1.5 m
Protection area
HVI conductor
light
20 m
Protection area
Protection area
30 m
© 2012 DEHN + SÖHNE / protected by ISO 16016
Separation Distance
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No electrically
conductive or
earthed parts
may be located in
this protection
area!
adjustment range approx. 140 cm
SET I
Air-termination tip 1000 mm
total height 2900 mm,
with
supporting tube
and tripod
s
© 2012 DEHN + SÖHNE / protected by ISO 16016
Air-term. tip 1m
DEHNconductor system / HVI® conductor light
Isolated air-termination system, air-termination mast
Separation Distance
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DEHNconductor system / HVI® conductor light
Isolated air-termination system, flat roof
© 2012 DEHN + SÖHNE / protected by ISO 16016
Separation Distance
Air-term. rod 2m
SET II
Air-termination rod 2000 mm
total height 3900 mm,
with
supporting tube
and tripod
35
DEHNconductor system / HVI® conductor light
Isolated air-termination system, flat roof
Connecting plate with
4 connection possibilities
© 2012 DEHN + SÖHNE / protected by ISO 16016
Separation Distance
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