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Welcome to the ABB WebinarLightning ProtectionLightning Protection
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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.
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
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
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)
“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)
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
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)
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
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
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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.