IEC 62305-Protection Against Lightning Part 2- Risk Assesment - Has international approval 1 STRUCTURE'S DIMENSION Property a. Length (m) b. Width (m) c. Height (m) d. Height of Highest roof protrution from Ground(m) 2 a. b. c. d.
STRUCTURE ATTRIBUTES Risk of Physical damage (including fire) Structure screening effectiveness Internal wiring type Type of floor surface
3 ENVIRONMENTAL INFLUENCES a. Location factor b. Environmental factor c. No. of thunderstrom days/year d. Annual ground flash density (flashes/sq.km) 4 a i ii iii b i ii c i ii
CONDUCTIVE ELECTRICAL SERVICE LINES Power Line Type of service to the structure Type of external cable Presence of MV/LV Transformer Other Overhead services (ex. Telephone, data etc) No. of conductive services Type of external cable Other Underground services (ex. Telephone, data etc) No. of conductive services Type of external cable
6 STRUCTURS OCCUPANCY Total No of people in the structure No.of people in the required zone ( to be filled if the risk assesment is done for a particular zone otherwise write 0 ) No of days people are present in the structure ( per week ) No.of hours per day people are present in the structure 7 PROTECTION MEASURES a Additional Protection measures b Class of LPS c Fire protection provisions d SPD 8 TYPE OF LOSSES a. TYPE 1-LOSS OF HUMAN LIFE: i. Special hazards to life ii. Life loss due to fire iii. Life loss due to oervoltages b. TYPE 2-LOSS OF ESSENTIAL PUBLIC SERVICES i. Services lost due to fire ii. Services lost due to over voltage
c. TYPE 3- LOSS OF CULTURAL HERITAGE Cultural heritage lost due to fire
d TYPE- 4- ECONOMIC LOSS i Special Hazards to Economics ii Economic loss due to fire
iii Economic loss due to over voltage
iv Step/Touch potential loss factor v Tolerable risk of economic loss
a b c d
If above details are given, below can be calculated as per International standards Loss of Human life Loss of public services Loss of cultural heritage (where applicable) Economic losses Note: Calculated risk is calculated based on the details provided by customer/consultant.
the risk assesment is done for a particular zone otherwise write 0 )
Soil equipotentialisation / Electrical insultaion / Warning notices / Physical restrications / No protection measures Class I , Class II , Class III , Class VI Automated Systems / Manual Systems / No measures SPD IEC 62305 / SPD I / SPD II / SPD III & IV
No special hazards/low panic level/average panic level/high panic level/evacuation difficulties/environmental hazards/contamination risks commercials/schools/churches/museums/hospitals/hotels/other structures Not relevant/with safety critical systems/hospitals/potentially explosive.
No services exist/Railway/Power supply/Telecommunications/Radio and TV/Water supply/Gas supply No services exist/Railway/Power supply/Telecommunications/Radio and TV/Water supply/Gas supply
No heritage/ Irreplacebale heritage/not applicable
No special hazards/ environmental hazards/contamination risk Not relevant/Other structures/Prison/Church/Public sites/Museum/School/Agricultural site/Industrial site/Commercial site/Hospital/Hotel/office/explosive risk Not relevant/Other structures/Prison/Church/Public sites/Museum/School/Agricultural site/Industrial site/Commercial site/Hospital/Hotel/office/explosive risk No shock risk/Live stock inside/live stock outside 1 in 10, 1 in 100, 1 in 1000, 1 in 10,000; 1 in 1 lakh
culated as per International standards Tolerable risk/Direct strike risk/Indirect Tolerable risk/Direct strike risk/Indirect Tolerable risk/Direct strike risk/Indirect Tolerable risk/Direct strike risk/Indirect
