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© 2012 DEHN + SÖHNE / protected by ISO 16016 Separation Distance 1.

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Presentation on theme: "© 2012 DEHN + SÖHNE / protected by ISO 16016 Separation Distance 1."— Presentation transcript:

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2 © 2012 DEHN + SÖHNE / protected by ISO Separation Distance 1

3 © 2012 DEHN + SÖHNE / protected by ISO Separation Distance Proximity between the telecommunication line and the down conductor Telecommunication line 2

4 © 2012 DEHN + SÖHNE / protected by ISO Separation Distance Faulty installation Separation distance? s? 3

5 © 2012 DEHN + SÖHNE / protected by ISO Separation Distance Separation distance s Problematic installation of metal lines / S6047e e.g. e.g. electric line Ref.: IEC :2006; Annex E, Figure E.38 s l 4

6 © 2012 DEHN + SÖHNE / protected by ISO Separation Distance Electrical insulation of the external LPS IEC :2006, 6.3 kcs=ki lkmkcs=ki lkm “The electrical insulation between the air-termination or the down- conductor 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‘: k i depends on the selected class of LPS (see Table 10); k c depends on the lightning current flowing on the down conductors (see Table 11); k m depends on the electrical insulation material (see Table 12); lis 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.“ 5

7 © 2012 DEHN + SÖHNE / protected by ISO Separation Distance Insulation of the external LPS Values of coefficients k i and k m Ref.: IEC :2006, 6.3, Table *DEHNiso value stated by DEHN + SÖHNE (Dr. Zischank VAZ) Class of LPSk i Material k m NOTE 1 When there are several insulating materials in series, it is good practice to use the lower value for k m. NOTE 2 The use of other insulating materials is under consideration. I0.08 II0.06 III and IV0.04 Air1 Concrete, bricks0.5 DEHNiso* spacer / Combi0.7 6

8 © 2012 DEHN + SÖHNE / protected by ISO Separation Distance Separation distance Coefficient k c for an air-termination rod S Individual air- termination rod k c = 1 Ref.: IEC :2006, Annex C, Figure C.1 7

9 © 2012 DEHN + SÖHNE / protected by ISO Separation Distance Formulas for the calculation of the partitioning coefficient k c Formula for the calculation of the partitioning coefficient k c in case of two down conductors and a type B earth-termination system h + c k c =———— 2h + c 1c k c =  + 0,1 + 0,2   2  nh 1c k c =  + 0,1 + 0,2   2  nh 3 Basic formula for the calculation of the partitioning coefficient k c Legend: nTotal number of down conductors cDistance of a down conductor to the next down conductor h Spacing (or height) between ring conductors Ref.: IEC :2006, Annex C, Figure C.2 8

10 © 2012 DEHN + SÖHNE / protected by ISO Separation Distance Formulas for the calculation of the partitioning coefficient k c From the point of proximity to the 1 st node k c1 = 1 From the 1 st node to the next node in case of two outgoing lines k c2 = 0.5 in case of three outgoing lines k c2 = 0.33 in case of four outgoing lines k c2 = 0.25 From the 1 st node to the next node in case of two outgoing lines k c2 = 0.5 in case of three outgoing lines k c2 = 0.33 in case of four outgoing lines k c2 = 0.25 National specification for the partitioning coefficient k c for buildings with “meshed“ air-termination system Every further node reduces the k c value* by half * NOTE: The value should not be smaller than 1n1n 9

11 © 2012 DEHN + SÖHNE / protected by ISO Separation Distance Calculation example of the separation distance s Building with gable roof, class of LPS III Calculation according to IEC Number of down conductors: 4 8 m c = 14 m l = 12 m 1c k c =    2  nh 1c k c =    2  nh 3 h = 6 m 10

12 © 2012 DEHN + SÖHNE / protected by ISO Separation Distance Calculation of k c according to IEC Calculation example of the separation distance s Building with gable roof, class of LPS III 1c k c =    2  nh 1c k c =    2  nh k c =    =  46 n = 4Total number of down conductors h = 6 mHeight or spacing of the ring conductors, gutter c = 14 mMax. distance between two down conductors 11

13 © 2012 DEHN + SÖHNE / protected by ISO Separation Distance Calculation example of the separation distance s Building with gable roof, class of LPS III k c s = k i   l  (m) k m k c s = k i   l  (m) k m 0.47 m s = 0.04   12 m = 0.47 m Coefficient class of LPS III: k i = 0.04 Partitioning coefficient: k c = Material used for the isolating distance Brick: k m = 0.5 Length along the air-termination conductor / down conductor: l = 12 m Calculation of s according to IEC

14 © 2012 DEHN + SÖHNE / protected by ISO Separation Distance Calculation example of the separation distance s Building with gable roof, class of LPS III Calculation of s according to IEC Number of down conductors: 4 8 m 14 m 0.66 m s = 0.04   17 m = 0.66 m l = 17 m Lamp Conductors Heating Water... 13

15 © 2012 DEHN + SÖHNE / protected by ISO Separation Distance Separation distance - Example 2.2 km = solid material Air-term. rod connected twice to the mesh network l=10m Air-termination rod Roof superstructure s = k i (k c1   l 1 + k c2   l k cn   l n ) / k m = s = 0.06 (0,5  8m  4m  10m  10m  8m) / 0.5 = s = 0.87m for solid material k c6 =0.042 l 6 = 8 m k c5 =0.063 l 5 = 10 m k c2 = 0.5 l 2 = 8 m k c3 = 0.25 l 3 = 4 m Roof superstructure h = 2m 20 m k c4 =0.125 l 4 = 10 m k c2 = 0.5 l 2 = 8 m s 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 k c : = = n 1 24

16 © 2012 DEHN + SÖHNE / protected by ISO Separation Distance Calculation according to Nodal Analysis 15

17 © 2012 DEHN + SÖHNE / protected by ISO Separation Distance Nodal analysis - Software for the determination of the separation distance s 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. = node R 14 R 15 R 16 R 17 R6R6 R7R7 R8R8 R9R9 R 10 R 11 R 12 R 13 R2R2 R3R3 R4R4 R5R5 R1R1  0V 16

18 © 2012 DEHN + SÖHNE / protected by ISO Separation Distance Model for the determination of current division Nodal analysis 17

19 © 2012 DEHN + SÖHNE / protected by ISO Separation Distance DEHN Distance Tool Start software Spearartion distance calculated according to nodal analysis 18

20 © 2012 DEHN + SÖHNE / protected by ISO DEHNconductor HVI ® Conductor Technology Fields of Application 19

21 © 2012 DEHN + SÖHNE / protected by ISO Separation Distance Basic development of a creepage discharge at the HVI conductor with special coating Insulation, semiconducting Inner conductor EB connection via earthing clamp Proximity to earthed metal parts 20

22 © 2012 DEHN + SÖHNE / protected by ISO HVI-Seminar HVI-Leitungen External coating (weather and UV resistant) Conductive shield (e.g. braided copper) Field control HV-Insulation conductor Connection with the air termination Induction of the lightning current (feeding point) Coaxial Cables with Field Control and Conductive Shield as insulated Down-conductors

23 © 2012 DEHN + SÖHNE / protected by ISO HVI-Seminar HVI-Leitungen / 3465 Lit.: connection to equipotential bonding high-voltage resistant isolation inner conductor connection to the air-termination system incoming lightning impulse current semi-conductivecoating sealing unit area Basic illustration of the structure of an isolated down conductor with semiconductive coating

24 © 2012 DEHN + SÖHNE / protected by ISO Separation Distance DEHNconductor system, HVI ® conductor I Conductor length has to be specified EB clamp Part No Conductor holder Part No Head piece HVI conductor I Part No Fixed EB element Earth connection element (removable) Sealing end section Earth connection 23

25 © 2012 DEHN + SÖHNE / protected by ISO Separation Distance Installation of the different types of HVI ® conductors HVI ® conductor type I EB connection Sealing end HVI ® conductor type II EB connection HVI ® conductor II, fixed length, secong sealing end fixed Sealing end HVI ® conductor type III HVI ® conductor III, can be cut to length, second sealing end has to be mounted Sealing end EB connection 24

26 © 2012 DEHN + SÖHNE / protected by ISO Separation Distance Isolate air-termination system for mobile radio stations DEHNconductor system HVI ® conductor Source: Bischof-Blitzschutz, Weyhe Air-termination tip GRP supporting tube No metal parts may be installed in the sealing end section! HVI ® conductor EB element Aluminium supporting tube 25

27 © 2012 DEHN + SÖHNE / protected by ISO Separation Distance Grey HVI ® conductor installed in the supporting tube with integrated sealing end and air-termination tip HVI ® conductor II Part No HVI ® conductor I Part No HVI ® conductor III Part No GRP supporting tube HVI conductor Air-termination rod Aluminium supporting tube 26

28 © 2012 DEHN + SÖHNE / protected by ISO Separation Distance Cable duct Foundation earth electrode Isolated air- termination system Metal roof superstructure Reinforcement Voltage-controlled insulated down conductor Separation distance is maintained  Sealing end metal capping of the parapet located in the protection area of an isolated air- termination system is connected to equipotential bonding Insulated HVI ® conductor I Equipotential bonding connection Equivalent separation distance of the HVI conductor: s = 0.75 m in air s = 1.50 m for solid material Separation distance s 27

29 © 2012 DEHN + SÖHNE / protected by ISO Isolated Lightning Protection Air-Termination Masts and HVI Conductor Light 28

30 © 2012 DEHN + SÖHNE / protected by ISO Separation Distance DEHNconductor system / HVI ® conductor light Disposable reel made of plywood (Ø approx. 80 cm), width approx. 50 cm Total weight approx. 66 kg HVI conductor light Prerequisite for the use of HVI conductors light: Separation distance  0.45 m (in air) Length 100 m on a reel: Part No Equiv. separ. distance s  0.45 m (in air)  0.90 m (solid material) CoreCopper (soft) Cross-section19 mm² InsulationPE (polyethylene) Outer diameter20 mm (black sheath 17 mm) ColourDark grey 29

31 © 2012 DEHN + SÖHNE / protected by ISO Separation Distance Isolated lightning protection system HVI  conductor light, class of LPS III Detail A air-termination mast HVI conductor light 30 m 18.1 m Detail A air-terminat- ion mast 15 m 30

32 © 2012 DEHN + SÖHNE / protected by ISO Separation Distance 1.90 m 27 m Protection area 20 m Isolated lightning protection system HVI  conductor light, class of LPS III HVI conductor light 1.5 m 30 m 1.5 m 31

33 © 2012 DEHN + SÖHNE / protected by ISO Separation Distance 15 m Protection area Fictitious dimensions of the structure for calculating the separation distance with DEHN Distance Tool 1.90 m Isolated lightning protection system HVI  conductor light, class of LPS III 20 m HVI conductor light 1.5 m 12 m Length of the connecting line (ficticious width of the structure) 17 m + ( 2 x 1.90 m ) = 20.8 m Length of the down conductor: (ficticious height of the structure until earthing) 20 m m m = 23.4 m Length of the connecting line (ficticious length of the structure) 27 m + ( 4 x 1.90 m ) = 34.6 m 32

34 © 2012 DEHN + SÖHNE / protected by ISO Separation Distance DEHN Distance Tool Start software Separation distance calculated according to nodal analysis 33

35 © 2012 DEHN + SÖHNE / protected by ISO Separation Distance DEHNconductor system / HVI ® conductor light Isolated air-termination system, air-termination mast SET I Air-termination tip 1000 mm total height 2900 mm, with supporting tube and tripod Air-term. tip 1m No electrically conductive or earthed parts may be located in this protection area! s adjustment range approx. 140 cm 34

36 © 2012 DEHN + SÖHNE / protected by ISO Separation Distance DEHNconductor system / HVI ® conductor light Isolated air-termination system, flat roof SET II Air-termination rod 2000 mm total height 3900 mm, with supporting tube and tripod Air-term. rod 2m 35

37 © 2012 DEHN + SÖHNE / protected by ISO Separation Distance DEHNconductor system / HVI ® conductor light Isolated air-termination system, flat roof Connecting plate with 4 connection possibilities 36

38 © 2012 DEHN + SÖHNE / protected by ISO Separation Distance Seminar Measures for keeping the Separation Distance DEHNiso Systems DEHNconductor Systems Application and Design 37

39 © 2012 DEHN + SÖHNE / protected by ISO Separation Distance Separation distance s Buildings made of reinforced concrete, steel frame,... IEC : 2006, 6.3 “In structures with metallic or electrically continuous, connected, reinforced, concrete framework of the structures, a separation distance is not required.“ 38


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