DEHN protects. · 2019-03-06 · IEC 62305-3:2010 6.3 Electrical insulation of the external LPS...

DEHN protects.

DEHN Asia Lightning protection seminar 1

Lightning Protection Standard

International Electrotechnical

Commission (IEC)

Common Ground for International Trade

Part 4 Electrical andelectronicsystems withinstructures

Part 3Physical damage to structures and life hazard

Part 2 Risk management

Lightning protection standard

IEC 62305:2010

“Protection against lightning"IEC 62305

Part 1 General principles

20.02.13 / 6004_E_1

SS 555 : 2018

Part 1: 85 pages

Part 2: 101 pages

Part 3: 179 pages

Part 4: 99 pages

IEC 62561

Standard for LPS Components

IEC 62561 deals with the requirements and tests for lightning protection

system components (LPSC) used for the installation of a lightning

protection system (LPS) designed and implemented according to IEC

62305 series of standards.

IEC 62561 consists of the following parts, under the general title

Lightning protection system components (LPSC):

IEC 62561-1: Requirements for connection components

IEC 62561-2: Requirements for conductors and earth electrodes

IEC 62561-3: Requirements for isolating spark gaps (ISG)

IEC 62561-4: Requirements for fasteners

IEC 62561-5: Requirements for earth electrode inspection housings and

earth electrode seals

IEC 62561-6: Requirements for lightning strike counters (LSC)

IEC 62561-7: Requirements for earth enhancing compounds

BCA Circular

Ref : APPBCA-2018-09 (31 Oct 2018)

IEC 62305 / SS 555-3

IEC 61643

Standard for SPD and SPD Application

IEC 61643-11:2011 (EN 61643-11:2012)

Surge protective devices connected to low-voltage power distribution

system. Part 1: Performance requirements and testing methods

IEC 61643-12

Surge protective devices connected to low-voltage power distribution

system. Part 12: Selection and application principles

IEC 61643-21

Surge protective devices connected to telecommunications and

signalling networks. Part 21: Performance requirements and testing

methods

IEC 61643-22

Surge protective devices connected to telecommunications and

signalling networks. Part 22: Selection and application principles8

IEC 616430-1 : 2005

Withdrawn

IEC 62305 / SS 555-4

External Lightning Protection System (LPS)

SS 555-1 : Foreword

Ref.: AS/NZS 1768:2007

External Lightning Protection System (LPS)

SS 555-1 : Foreword

ESE = methods for artificially increase the range

DAS = methods capable of modifying the natural weather phenomena

In the National Foreword, there is an important paragraph that gives directive

that ESE and DAS cannot be used as primary design.

For primary design, always stick to the three methods described in IEC 62305-3.

5. External lightning protection system

5.2 Air-termination systems

5.2.2 Positioning

Air-termination components installed on a structure shall be located at corners,

exposed points and edges (especially on the upper level of any facades) in

accordance with one or more of the following methods.

Acceptable methods to be used in determining the position of the air-

termination system include:

the protection angle method;

the rolling sphere method;

the mesh method.

The rolling sphere method is suitable in all cases.

The protection angle method is suitable for simple-shaped buildings but it is

subject to limits of air-termination height indicated in Table 2.

The mesh method is a suitable form of protection where plane surfaces are to be

protected.

IEC 62305-3:2010

16.03.13 / 6020_E_1

ESE “Early Streamer Emitter”

CTS “Charge Transfer Systems”

DAS “Dissipation Arrays”

Not recognise Non-conventional LPS (ESE2, CTS3 ,DAS4)

Not recognise non-conventional LPS

Source: http://www.ground.co.kr/PGS_forum/forum_20090818.html, 13-11-14

Charge Transfer System - Principle

Discharging the thunderstorm cloud before even a

lightning strike could happen.

Early Streamer Emission (ESE) Devices (I)

Picture: EricoIdea:

Launching an upward leader earlier than conventional systems.

This „time advantage“ can be then converted to an extended

virtual height of the physical length of the air termination rod.

Picture: Cirprotec

Damage to buildings with ESE air terminations

Kuala Lumpur, (byHartono and Robiah)

Kuala Lumpur, (by Hartono and Robiah)

SS 555 Part 1 & 2

Introduction

Lightning Flash Density

Overview of the risk components RX

19.07.13 / 5762_E_1

RA RB RC

RWRV RU

DEHNsupport – Risk analysis

DEHN Concept

Risk Management

DEHN Concept 15.06.2016 / 5604_E_1

Risk management for structures and

buildings according to IEC/EN 62305-2*

Four different categories are distinguished

in a risk analysis:

• Risk R1 : Loss of human life

• Risk R2 : Loss of service to the public

• Risk R3 : Loss of cultural heritage

• Risk R4 : Loss of economic value

Risk Assessment

Zoning

Risk Assessment

Zoning

Risk Assesment

Type of Loss

DEHN Asia Lightning protection

seminar30

10 -1 (0.1) : Hospital , Hotel , School , Civic Building • Civic Building = Public Building• Gymnasiums , Sports Stadiums , Swimming Pools • Shopping Centres, departments Stores • Railway Stations , airports , Bus Station• High-rise building• Blocks of flats (multi story)• Police Stations , fire departments, ambulances

5 x 10 -2 (0.05) : Public Entertainment , Church Museum• Agriculture buildings• Shelters, carparks• Single family house• Two-family houses (one or 2 story)

2 x 10 -2 (0.02) : Industrial , commercial • Industrial (non-explosive)

Risk Assessment

Reduction Factor

seminar31

Whole Building/Structure : • Low Risk: Semi – D* , Town House* ,

Open Space Car Park , Shelters , Bus Stops

• High Risk: Library , Multi Story Car Park , Library

By Zones : • High Risk : Kitchen , Hallway (if it is

carpeted – eg : Hotel)• Low Risk : Dining Area

Reference made from reports from Canada , Europe & New Zealand

Risk Assesment

Implementation - SPD

From the RA Requirement of SPD requirement is reflected in :• pEB: Lightning equipotential bonding : Equipotential bonding for LPL –

o By implementation Refers to the Mainboard • Surge Protection LPL

o By implementation usually refer to the respective Zone (Sub Board) – eg : Guard house , server room , residential etc…

Risk Assessment

Result

seminar33

SS 555 Part 3

Thickness of Bonding Material

seminar35

Annex E

as per IEC 62305-3

IEC 62305:2010-2012, Part 3

Physical Damage and Life Hazard

Lightning Protection System

IEC 62305-3:2010

6.3 Electrical insulation of the external LPS

6.3.1 General

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 separation distance, s, between the parts. The general

equation for the calculation of s is given by:

International Workshop 2015-07

kcs =ki • ⎯ • l

ki depends on the selected class of LPS (see Table 10);

km depends on the electrical insulation material (see Table 11);

kc depends on the (partial) lightning current flowing on the air-termination and the down-conductor (see Table 12 and Annex C);

l is the length, in metres, along the air-termination and the down conductor from the point, where the separation distance is to be considered, to the nearest equipotential bonding point or the earth termination (see E.6.3 of Annex E).

NOTE The length l along the air-termination can be disregarded in structures

with continuous metal roof acting as natural air-termination system.

04.08.14 / 6045_E_1

Demonstration test „Proximity“

Down conductor (copper)

Video (slow motion)

Lightning current distribution at the cell tower

Solution with spacer and HVI®Conductor

GRP supporting tube

HVI®Conductor

air-termination rod

aluminiumsupporting tube

spacer

Lightning effects on cell sites 12.06.15 [20150612] / 9925_E_10

air-termination rod

Demonstration test „Proximity“

High voltage-resistant, isolated down conductor

Video (slow motion)

Technical Trend of External LPS

Ref.: Insert text

Japan Science and Technology Agency (JST)

嶋田章 -村田電機製作所Murata Electric Manufacturing Co., Ltd. (1913)

• Conventional – non-isolated LPS

• Reinforcement suffer flash over ,

causes concrete chipping

• Higher probability for high rise

building

• Reinforcement system as part down

conductor is recommended

Flash Over Incident

Hilton , Kuala Lumpur , Malaysia

Ref.: Insert text

Hartono’s Respond to ILPA Posting

Z. A. Hartono and I. Robiah (Malaysia)

Senior Members IEEE (USA) ,

as per IEC 62305-3

IEC 62305:2010-2012, Part 3

Physical Damage and Life Hazard

Lightning Protection System

Minimum Thickness

Air Termination

*Special attention to be paid for combustible or flammable material –

ensuring temperature rise of inner surface does not constitute a danger

Air Termination

• Height of Person 2.5m must take into consideration

• To be Separated/Insulated from touch Potential

Attention to be paid for accessible Air Termination

• Side Flash @ 45m

• Corners , edges & Parapet walls - Metal Capping

radius of

rolling sphere

Methods for positioning of air termination systems

06.11.14 / 660_D_1

maximum building height

mesh size M

air termination rod

conductor

earth-termination

system

protection class radius of rolling sphere mesh size

I 20 m 5 × 5 m

II 30 m 10 × 10 m

III 45 m 15 × 15 m

IV 60 m 20 × 20 m

3D concept development / Project schedule

- Protected volume

19./20.01.15 / MKN

Protection in Open Space

Type A , B & C

Type A : Small defined open space full protection can be provided

Type B : Open habitable roof space where people regularly present and where

full protection can be provided . Examples:

• Penthouse open terrace

• Roof Gardens

• Roof Level Multi-story car parks

• Roof Amenities – café Sport facility , swimming pools

Type C : Large open spaces where full protection is not practicable :

• School fields

• Public parks

• Beaches

• Golf Course

• Vacant land for ad-hoc activities – trade fairs , fun fairs etc.

Rolling Sphere

Example

Rolling Sphere

Air Termination & Down conductor

+ Separation Distance

Air Termination

Avoiding Touch & Separation Distance

Air Termination + Separation Distance

Direct connection of roof-mounted structures

Partial lightning currents inside the structure

International Workshop 2015-07 24.06.13 / 1535_E_1

ventilation /

air-conditioning

system

distributor

MEBserver

MEB: Main Earthing Busbar; EB: Earthing Busbar

Protection of roof-mounted structures with

isolated air-termination system

Server

ventilation

system/air

conditioning

FDB: Floor Distribution Board; MEB: Main Equipotential Bonding; EB: Equipotential Bonding

Lightning current

discharged from the

outside

06.11.13 / 8371_E_1International Workshop 2015-07

17.07.2013

Air-termination system

for small-sized electric roof installations

Protection of the roof-mounted fan by

means of an air-termination rod

according to:

IEC 62305-3 Subsection 5.2.2

Protective angle α according to Table 2

Connection of the roof-mounted fan via a

spark gap according to

DIN VDE 0185 T1

Direct connection of a roof-mounted fan

according to ABB 8th edition

16.09.13 / 369_E_1

Conductor Holder

Roof Tile

Conductor Holder

Roof Tile

Down conductor

No Aluminum to Concrete

Conductor Holder

Test Joints

Test Joints :

• Type 1 : Expose down conductor

2.5m @ Every down conductor [ j]

– i : 0.3m

– k : 0.5m

Touch Voltage

Step Voltages

Protection measures against

touch and step voltage

Ref.: IEC 62305-3:2010, 8.1

23.02.13 / 2934_E_1

“There are no persons

within 3 m from the down

conductors.”

No life hazard if...

3 m 3 m

“A layer of insulating

material, e. g. asphalt,

of 5 cm thickness (or

a layer of gravel 15

cm thick)”

“The contact resistance of

the surface layer of the

soil is not less than 100

kΩ.“

External LPS Presentation 67

If none of these conditions is fulfilled, protection

measures shall be adopted against injury to

living beings due to touch voltages as follows:

insulation of the exposed down-conductor is

provided giving a 100 kV, 1,2/50 μs impulse

withstand voltage, e.g. at least 3 mm cross-

linked polyethylene

physical restrictions and/or warning notices to

minimize the probability of down-conductors

being touched

Protection measures against touch voltage

Ref: IEC 62305-3 :2010; 8.1

down conductor insulated to a value of 100 kV (1.2/50 µs)

05.02.13 / 2934_E_2

insulation

of 3 m

External LPS Presentation 68

CUI Conductor

Protection against touch voltage at down conductors

CUI ConductorTechnical data

Impulse withstand

voltage

100 kV (1.2/50 µs)

Conductor material copper

Insulation material cross-linked PE

Outer diameter

(conductor)

Cross-section 50 mm² (Ø 8 mm)

Protective coating

of the skin

PE, light grey

Length of 3.5 m

Length of 5 m

Part No. 830 208

Part No. 830 218

Eliminates the risk of touch voltage for

living beings according to IEC 62305-3

04.02.13 / 4499_E_2External LPS Presentation 69

Joints conforming to IEC 62305

Suitable for Lightning & EMC

Recommended• No Power Source Require

• No Life Hazard

• No Health Hazard • Chemical release from welding

• Installation by torque wrench

• Inspection by torque wrench

• Faster installation Completion• 3 – 5x faster

• Lower Level of skill requirement

compare to Welding & Bound

Joints

SS 555, Part 3

Reinforcement & Natural Down Conductor

SS 555, Part 3

Reinforcement & Natural Down Conductor

Simulation of the current distribution

Using the reinforcement as natural down conductor

Compact Lightning Protection Seminar – Separation distance 27.09.12 / 5857_E_2

6.3 Electrical insulation of the external LPS

6.3.1 General

In structures with metallic or electrically continuous connected reinforced

concrete framework a separation distance is not required.

IEC 62305-3:2010

24.06.13 / 6148_E_1

Note DEHN:

Only applies to the separation distance inside the building!

Compact Lightning Protection Seminar – Separation distance

High Rise Building

Separation Distance – Conventional Design LPL III @ 200kA

Building Profile :

Height : 60

Width : 25

Length : 25

Details of Simulation

Selected class of LPS : III

Current intensity : 200 kA

Insulation coefficient km: 0.5

Potential level : -10 m

Furthest 3m 18m 35m 45m 55m

2.06 m 29cm 66cm 1.03m 1.23m 1.5m

High Rise Building

Separation Distance – Reinforcement Design LPL III @ 200kA

Building Profile :

Height : 60

Width : 25

Length : 25

Selected class of LPS : III

Potential level : 58 m

56cm Equipotential

High Rise Building

Separation Distance – Reinforcement Design LPL I @ 200kA

Building Profile :

Height : 60

Width : 25

Length : 25

Selected class of LPS : I

Potential level : 58 m

41cm Equipotential

BS 7430:2011 / SS 551

Code of practice for protective earthing of electrical installations

9.5.8.5 Structural steelwork

Foundation metalwork in concrete may be used as a ready made and

effective earth electrode. The total electrode area formed by the

underground metalwork of large structure may often be used to provide

an earth resistance lower then that obtainable by other methods; overall

values well below 1 Ω are obtainable.

Ring earth electrode in case of perimeter insulation

Installation in the blinding layer

Ref.: Fritz Mauermann GmbH + Co. KG, Paderborn

ring earth electrode

material: StSt (V4A)

mesh size of 10x10 m, if a

lightning protection systems

is installed

07.01.13 / 5523_E_1Compact Lightning Protection Seminar – Basics of dimensioning

DIN 18014: Earth-termination system in case of

foundations with increased earth contact resistance

ring earth electrode, mesh size

- 10 m x 10 m with LPS

- 20 m x 20 m without LPS

functional bonding conductor,

mesh size ≤ 20 m x 20 mconnection to the

reinforcement at

intervals of 2 m

ring earth electrode, mesh size

- 10 m x 10 m with LPS

- 20 m x 20 m without LPS

Connection of the ring earth

electrode to the functional

bonding conductor

per down conductor of the

lightning protection system

at intervals of 20 m /

circumference of the building

pressure-water-tight

wall bushing

13.11.13 / 6608_E_11

pressure-water-tight wall bushing

blinding layer

foundation slab

highest ground water level

ground surface

connection to the reinforcement

connectingclamp

equipotential bonding conductor

ring earth electrode

terminal lug

Compact Lightning Protection Seminar – Basics of dimensioning

Lightning protection zones concept

Detail: Earth-termination system

Earth-termination system

Connection to the

reinforcement mesh

Detail: Down-conductor system

Connection of the down-conductor

system to the foundation earth electrode

15.11.12 / 8080_E_16

Test Joints

• Type 2 : Natural down conductor and flushed mounted

1.5m min 2

No Earth Pit Require

Connection of the down-

conductor system to the

foundation earth electrode

Establishing a “lightning equipotential bonding level“

for a new building

based on IEC 62305-4

NOTE:Such a lightning protection system is ideally suited for new buildings where a low-impedance structure should be created to be able to neglect separation distances from the inside of the structure up to the roof level.

Typical distances

a = about 5 m

b = about 5 m

1 Connection between the air-termination

system and the down conductors

2 Horizontal connecting conductor

3 Reinforcing bars

4 Down conductor and ring conductor

5 Equipotential bonding bar of the

internal lightning protection system

6 Test clamp

7 Current carrying connection

8 Air-termination rod

Ref.: EN 62305-4:2010, Figure 7

04.01.2017 [20160502] / 9207_E_1

directconnection tothe intermeshingin thereinforcement

Metal facade used as a natural down conductor

04.01.17 [20161213] / 2979_E_1

connection to the earth-termination system

1 Metal capping of the roof

parapet

2 Connection between the

facade cladding and the

air-termination system

3 Horizontal air-termination

system

4 Metal facade cladding

5 Equipotential bonding

bar Connection between

the plates of the facade

cladding

6 Connection between the

facade elements and the

load bearing construction

7 Test joint

8 Steel reinforcement

embedded in concrete

Typical distances

a/b = 5 m; c = 1 m (not common practice for curtain walling)

Ref.: EN 62305-3:2010, Figure E.8a

Multi-storey building with utilisation of the

reinforcement

Structure of the building

14.12.16 [20160503] / 10289_E_1

Mesh size of the ring earth electrodeacc. DIN 18014 - max. 10 x 10 m (each down conductor must be connectedto the ring earth electrode)

Equipotential surface3

Note: Building is not shielded according IEC 62305-4

2 Mesh size of the functionalbonding conductor acc. DIN 18014 - max. 20 x 20 m

Low-voltage supply system

Equipotential bonding

Lightning Protection Zone

Fixed earthing point

Lightning equipotential bondingLightning current arrester

Local equipotential bondingSurge arrester

Functional earthing

Multi-storey building with utilisation of the

reinforcement

Isolated lightning protection system on the roof

11.01.17 [20160503] / 10289_E_5

Curtain-wall metal facing

Equipotential surface1

Lightning equipotential bondingLightning current arrester

Functional earthing

Note: Building is not shieldedaccording to IEC 62305-4

LPL D+S recommend: SPDs Type 2 based on

VDE 0100-534, Table 534.3B

D+S recommend: SPDs

LPL I Nominal discharge current In 20 kA (8/20µs) / pole Nominal discharge current In 10 kA (8/20µs) / wire

LPL II Nominal discharge current In 15 kA (8/20µs) / pole Nominal discharge current In 10 kA (8/20µs) / wire

LPL III / IV Nominal discharge current In 10 kA (8/20µs) / pole Nominal discharge current In 10 kA (8/20µs) / wire

"s" is kept

Detail: Down-conductor system

Down conductor in the supporting structure

Connection of the down

conductor to the

reinforcement of the

supporting structure

15.11.12 / 8080_E_15

Example:

Two-storey building (according to IEC 62305-3)

02.05.17 [20160504] / 10316_E_1

Lightning equipotential bondingLighning current arrester

Functional earthing

c= 10 m

h1 = h2 = h3 = 3.0 m

Detail: Equipotential bonding

Equipotential bonding of metal

installations

15.11.12 / 8080_E_21

Detail: Structural Metal components

e. g. railings

e. g. lifts systems

e. g. cable trays

15.11.12 / 8080_E_22

Reinforcement as Down conductor

Separation Distance , Down Conductor & Bonding

Ref.: Insert text

Advantage:

• Solved :

• Separation Requirement (Except Roof Top)

• Touch (Except Roof Top) & Step Voltage Hazard

• Shielding Effect

• Ease of Bonding Point Introduction ( Omits Long cable for Bonding)

• < 1Ω Earthing Value (Foundation/Structure Steel Work Being Use)

• Anti Theft

• Long Term – Maintenance Free / Negligible replacement requirement

• No need earth pit

• Only 2 earth test point diagonally installed

• Ease Architectural Design

• Cost & Time Savings

Continuity Test

SS 555 Part 4

Comparison of test currents

30.07.13 / 916_E_1

i [kA]

t [µs]

20 400 600 800 1000

wave form [µs] 10/350 8/20

imax [kA] 40 40

Ref.: IEC 61643-11

Comparison of test currents

Video: Impact on the electrical installation

11.02.13 / 916_E_4

Laboratory test with simulated lightning currents

according to IEC 61643-11

GSM customer panel 50 kA (10/350 µs)

Application

Surge protection for power supply systems

30.07.14 / 8350_E_1

power network

> 10 mDEHNflex

DEHNrail

DEHNsafe

Type 3

DEHNventil M

Type 1+2

DEHNguard M

Type 2

DEHNguard M

Type 2

terminal

device

> 10 m

terminal

device

terminal

device

terminal

device

terminal

device

MDB Main Distribution Board

SDB Sub Distribution Board

Lightning Current Distribution LPL I = 200 kA

(10/350µs)

Service

Transformer

25 kA per Line

External Lightning Protection

Building

200 kA

100 kA

25 kA each

100 kA

Sizing & Configuration according to

LPL (lightning protection level)

Compact Surge Protection Seminar – Causes

Ref.: IEC 62305-1:2010, Table 3 (extract)

16.07.14 / 6006_E_1

First positive impulse Lightning protection level (LPL)

I II III-IV

Peak current I (kA) 200 150 100

Iimp N-PE (kA) 100 75 50

Iimp L-N (kA) 25 18.75 12.5

Time parameters T1/T2 (µs/µs) 10/350

Application of SPD in ACPD (AC Power Distribution)

Internal

protection

230/400 V

• In accordance with IEC 61643-11

• Combined SPD (Type 1+2), Voltage Protection ≤ 1.5kV

• Lightning Impulse Current (10/350us)

- 25kA per channel, 100kA total (LPL1)

- 12.5kA per channel, 50kA total (LPL3)

• Differential mode or 3+1 configuration

• Ensure energy coordination of SPD

• Follow Current (If) shall be less than current rating of the

incoming breaker to avoid nuisance tripping

• Follow Current Interrupt Rating (Ifi) & Short-Circuit Rating

of SPD (Isccr) ≥ Prospective short circuit rating of System

• Backup fuse rating in accordance with IEC 61643-12

• Metal encapsulated spark-gap to ensure no plasma jet

• TOV, 440V, min 2 hrs

• Status indicator to show the serviceability of the SPD

including N-PE channel

AC Power Distribution Board

Thank You

DEHN protects. · 2019-03-06 · IEC 62305-3:2010 6.3 Electrical insulation of the external LPS...

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