Upload
tranliem
View
233
Download
2
Embed Size (px)
Citation preview
Welcome to the ABB WebinarLightning ProtectionLightning Protection
The presentation will begin at 13 00 BST The presentation will begin at 13.00 BST
If you are having any problems viewing or hearing the webinar then please ask a question using the question panel
You can ask questions during the presentation using the question panel
The audio box allows you to choose your audio options All attendees will be muted during the
The full screen icon maximizes the presentation area.
options. All attendees will be muted during the webinar. If you have selected “Use Telephone” the box below will appear, providing you with the call-in information. Please note the location of the dial-in number, access code and audio pin below. You will receive the correct numbers both in your verification email following registration and on the
The raise hand icon alerts the organizer that you have a question or comment.
g gconsole on the day of the webinar.
The questions panel allows you to send a question to the organiser. During Q&A the organiser will direct all
© ABB Group November 15, 2012 | Slide 1
During Q&A the organiser will direct all questions to the appropriate presenter.
Li ht i P t tiABB Engineering Services / Webinar - 14th September 2011
Lightning Protection
© ABB Group November 15, 2012 | Slide 2
ABB Engineering Services
ABB GroupABB Group Headquarters: Zurich, Switzerland
More than 130,000 employees in about 100 countries
Orders in 2010: £32 billion
ABB Engineering Services part of ABB Consultancy businessg g p y
“A leading international technical consultancy focussed on process industries”
Focus on the chemical power oil & gas metals and pharmaceutical sectors Focus on the chemical, power, oil & gas, metals and pharmaceutical sectors
500 employees
UK Offices Warrington, Billingham, Burton-on -Trent, Aberdeen, Hull
World-class safety performance
Operating Globally in Azerbaijan, Belgium, Denmark, Ireland, Malaysia, Netherlands, Norway, S.Africa, Saudi Arabia, Singapore, Thailand, UAE & USA
© ABB Group November 15, 2012 | Slide 3
y g p
Accounts
Objectives for the webinar
Update on key industry topics Update on key industry topics
Share good practice
© ABB Group November 15, 2012 | Slide 5
Li ht i P t tiJohn Jones, ABB Engineering Services / Webinar - 14th September 2011
Lightning ProtectionAs required by Part 2 of BS 62305:2006q y
© ABB Group November 15, 2012 | Slide 6
Recent events...
The Airbus A380 on its descentThe Airbus A380 on its descent into London’s Heathrow airport.
Gatwick Airport – Lightning strike near to control tower. Resulted in temporary loss of systems
© ABB Group November 15, 2012 | Slide 7
Recent events...
T d il tTexaco crude oil storage
Houston, Texas
The fire started when lightning struckThe fire started when lightning struck the tank
Antwerp Harbour, Belgium g
© ABB Group November 15, 2012 | Slide 8
Have you seen these effects: ?
Broken Broken
TVs
Modem Router
PC’s
Hi-Fi
Telephone Cordless
Etc
In Industry
DCS
SIS
Field Equipment
© ABB Group November 15, 2012 | Slide 9© ABB Group November 15, 2012 | Slide 9
POLL 1
Purpose of today
Is to understand:Is to understand:
The process and methodology to perform a risk assessment as required by BS 62305:2006 Part 2
© ABB Group November 15, 2012 | Slide 10
History of lightning protection in the UK…
© ABB Group November 15, 2012 | Slide 11© ABB Group November 15, 2012 | Slide 11
What is Lightning ?
Li hti i t h i l t t tiLighting is an atmospheric electrostatic discharge that typically occurs during a thunder storm, but also during volcanic eruptions and dust stormseruptions and dust storms.
Lightning can :
Reach speeds of 140,000 mph,
Reach temperatures of 30,000°C
Carry a current up to 18 kA
Carry a charge of 30 – 50 million volts
© ABB Group November 15, 2012 | Slide 12© ABB Group November 15, 2012 | Slide 12
British Standard BS EN 62305:2006
British Standard for lightning Protection was BS6651 fromBritish Standard for lightning Protection was BS6651 from 1985
In the last twenty years our understanding of the subject (and its effect) has increased.
This resulted in a new suite of standards This resulted in a new suite of standards
UK now 1 of 28 European countries that form CENELEC -(Electrical arm of Comite European de Normalisation)
4 Part standard produced under CENELEC produced EN62305
Each European country has adopted a variation of EN62305 which are to be used in their own country Annexeswhich are to be used in their own country - Annexes
BS EN 62305:2006 is the same as EN 62305 with modifications for National ‘Annexes’
Other non-EU countries might have their own national gstandard which would take precedence over EN62305
If EN62305 is used in a non-EU country then the relevant Annexe shall be used
BS6651 withdrawn in 2008
© ABB Group November 15, 2012 | Slide 13© ABB Group November 15, 2012 | Slide 13
BS6651 withdrawn in 2008
British Standard BS EN 62305 : Parts 1 - 4
© ABB Group November 15, 2012 | Slide 14© ABB Group November 15, 2012 | Slide 14
Identify the types of loss relevant to
Risk Management Procedure
Identify the structure to be protected
the structure to be protected Rn
R1 Risk of loss of human life
R2 Risk of loss of service to the public
R3 Risk of loss of cultural heritage
R4 Risk of loss of economic value
F h l t b id d
For each loss to be considered
identify the tolerable level of risk Rt
For each loss to be considered,
identify and calculate the risk
components Rx that make up the
total risk Rntotal risk Rn
Calculate
Rn = Rx
R < RtInstall protection
measures in orderNo
Rn<=Rt measures in order
to reduce Rn
Yes
© ABB Group November 15, 2012 | Slide 15
For each loss to be considered
identify the tolerable level of risk Rt
BS EN 62305 Part 2 risk assessment
Have you carried out a BS EN 62305 Part 2 risk assessment? Have you carried out a BS EN 62305 Part 2 risk assessment?
What are you going to do with the results?
Any corrective actions! Any corrective actions!
© ABB Group November 15, 2012 | Slide 16© ABB Group November 15, 2012 | Slide 16
POLL 2
Notes about types of damage & types of losses
D1: damage to living beings due to contact and step D1: damage to living beings due to contact and step voltage
D2: material damage (fire, explosion, mechanical destruction, release of chemical substances) due to the effect of the lighting current, including destructive discharges
D3: system faults due to LEMP (lightning electromagnetic impulse)
L1: loss of human life
L2: loss of public service L2: loss of public service
L3: loss of irreplaceable cultural heritage
L4: economic loss loss of the structure and its content
© ABB Group November 15, 2012 | Slide 17
L4: economic loss, loss of the structure and its content
The S1 effect of lightning
“S1” Lightning on the structure:“S1” Lightning on the structure:
this occurs when lightning hits the structure directly causing possible immediate mechanical damage, fires and/or explosions, damage to people due to step and contact voltages and faults or malfunctioning of internal systems due to LEMP (lightning electromagnetic impulse)
Type of Damage
Injury to living beings (D1)
Type of LossLoss of human life (L1)
L f bli i (L2)Physical damage caused by dangerous sparking inside the structure (D2)
Failure of internal systems caused by LEMP (D3)
Loss of public service (L2)
Loss of irreplaceable cultural heritage (L3)
Economic loss, loss of the structure and its content (L4)
© ABB Group November 15, 2012 | Slide 18© ABB Group November 15, 2012 | Slide 18
LEMP (D3)
The S2 effect of lightning
“S2” Lightning near the structure:“S2” Lightning near the structure:
this occurs when lightning hits near the structure (at a distance “d”) causing possible faults or malfunctioning of internal systems due to LEMP (lightning electromagnetic impulse)
Type of Damage
Failure of internal systems caused by LEMP (D3)
Type of LossLoss of human life (L1)
L f bli i (L2)LEMP (D3) Loss of public service (L2)
Economic loss, loss of the structure and its content (L4)
© ABB Group November 15, 2012 | Slide 19© ABB Group November 15, 2012 | Slide 19
The S3 effect of lightning“S3” Li ht i i t i“S3” Lightning on services entering the structure:
this occurs when lightning does not hit the g gstructure directly but the services entering the structure (telephone cables, antenna systems, electrical line etc...) causing possible fires and/ or explosions started by discharges due to surges
and lightning currents transmitted byType of Damage
Injury to living beings (D1) and lightning currents transmitted by means of the entering service, damage to people due to contact voltages inside the structure and faults or malfunctioning of
Injury to living beings (D1)
Physical damage caused by dangerous sparking inside the structure (D2)
Failure of internal systems caused by structure and faults or malfunctioning of internal systems due to surges
Failure of internal systems caused by LEMP (D3)
Type of LossLoss of human life (L1)
Loss of public service (L2)
Loss of irreplaceable cultural heritage (L3)
E i l l f th t t d it
© ABB Group November 15, 2012 | Slide 20© ABB Group November 15, 2012 | Slide 20
Economic loss, loss of the structure and its content (L4)
The S4 effect of lightning
“S4” Lightning near the services“S4” Lightning near the services entering the structure:
this occurs when lightning hits near the services entering the structure (at a distance “d”) causing possible faults or malfunctioning of internal systems due to surges
Type of Damage
Failure of internal systems caused by LEMP (D3)
Type of LossLoss of human life (L1)
L f bli i (L2)LEMP (D3) Loss of public service (L2)
Economic loss, loss of the structure and its content (L4)
© ABB Group November 15, 2012 | Slide 21© ABB Group November 15, 2012 | Slide 21
Lightning protection
Buildings Process Plant
VsVsStructure Covered by Faraday cage...
However Electronic Equipment Vulnerable from indirect strike
Well defined
© ABB Group November 15, 2012 | Slide 22© ABB Group November 15, 2012 | Slide 22
Well defined
“Protects Building”
Process plant vulnerability
© ABB Group November 15, 2012 | Slide 23© ABB Group November 15, 2012 | Slide 23
Typical exposure to risk
© ABB Group November 15, 2012 | Slide 24
BS EN 62305 risk assessment methodology
Cable routing
Number of cablesu be o cab es
Cable types
Existing protectiong p
Size of structure / building
Surrounding area
Location
© ABB Group November 15, 2012 | Slide 25© ABB Group November 15, 2012 | Slide 25
HSE ALARP (As Low As reasonably Practicable)
© ABB Group November 15, 2012 | Slide 26
Industry Example...
Line 1 PowerLine 2 Unshielded and no bondingLine 3 Instrumentation
Line 2Line 3
Line 4 InstrumentationLine 5 InstrumentationLine 6 UPS Power supply
Li 1
Control Building
Line 1Line 4
Line 6 g
Primary structure
Line 5
Primary structureStructure ID: Primary Structure - Rectangular with a pitched hipped roof
Lb 42.00 m Length of primary structureWb 18.00 m Width of primary structureHe 6.00 m Height to eaves of primary structureHr 9 00 m Height to ridge of primary structure
EnvironmentNg 0.04 Lightning flash density (Flashes/km²/year)Cd 0.25 Location factorCe 0.00 Environmental factor
Hr 9.00 m Height to ridge of primary structure
© ABB Group November 15, 2012 | Slide 27
Rho 50.00 �m Soil resistivity (Ohm metres)
Typical assessment results
Li ht i i k t f b ildiLightning risk assessment for buildings
Tolerable Risk Direct Strike Risk Indirect Strike Risk Calculated RiskRT RD RI RXRT RD RI RX
Control Building 1 1 E ‐05 0.043 E ‐05 1.36 E ‐05 1.4 E ‐05Control Building 2 1 E ‐05 0.068 E ‐05 1.25 E ‐05 1.31 E ‐05Control Building 3 1 E ‐05 0.178 E ‐05 1.33 E ‐05 1.5 E ‐05Control Building 4 1 E ‐05 0.013 E ‐05 1.01 E ‐05 1.02 E ‐05
What does this mean?
Building 4 1 E 05 0.013 E 05 1.01 E 05 1.02 E 05
© ABB Group November 15, 2012 | Slide 28© ABB Group November 15, 2012 | Slide 28
Explanation of results
R2_T and R3_T not applicable to a process plant
© ABB Group November 15, 2012 | Slide 29© ABB Group November 15, 2012 | Slide 29
Where might you fail ?
Examples Examples
Old Telecom Cables
Multicore cables entering plant Multicore cables entering plant
Power cables entering buildings
No surge protection fittedNo surge protection fitted
© ABB Group November 15, 2012 | Slide 30© ABB Group November 15, 2012 | Slide 30
Summary
Process Plant to be treated differently to ‘buildings’ Process Plant to be treated differently to buildings .
Risk assessment will be required Risk assessment will be required
Good chance of “failing” risk assessment for indirect strikeGood chance of failing risk assessment for indirect strike
But, you may be able to mitigate the risk by modifying / d ti i ti kitadapting existing kit
Benefits Vs Cost. – ALARP
Use relevant Annexe if non-UK
© ABB Group November 15, 2012 | Slide 31© ABB Group November 15, 2012 | Slide 31
Question and answer session
Please feel free to ask a question via your microphone / Please feel free to ask a question via your microphone / telephone by clicking on the raise hand button
Or ask through the question panel
© ABB Group November 15, 2012 | Slide 32
Forthcoming webinars 2011
19th October 2011 COMAH For Recent Entrants19th October 2011 COMAH - For Recent Entrants
16th November 2011 The Learning from Buncefield
If you wish to book onto any of these forthcoming webinars or i i f ti l il LTF @ b bbrequire more information please email: [email protected]
This Lightning Protection Webinar will be hosted on our website and This Lightning Protection Webinar will be hosted on our website and a link will soon be available.
© ABB Group November 15, 2012 | Slide 33
Contact details
John JonesJohn JonesConsultant
Tel: 01642 833642
Mobile: 07889 044739
Email: [email protected]
Ken ShepherdKen ShepherdProcess Automation
Tel: 01642 372223
Email: [email protected]
© ABB Group November 15, 2012 | Slide 35