Iec 62305 vs Ese vs Is2309
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Comparison between IEC/IS approved External LPS Vs NFC based ESE Feature Faraday cage type Ext LPS as per IEC 62305 Faraday cage type Ext LPS as per IS 2309 ESE (Early Streamer Emission) Coverage area imaginary - no proof available . Approvals IEC 62305-3 - International standard IS 2309 & IS 3043 - National standard. Insurance cover Yes. Yes. No. Not approved by IS & CEIG Not as per any international method. Not as per any international method. Design of LPS Based on Experience & old IEC, BS standards. Not as per any international method. As per IEC 62305, Ed 2, released in 2010 As per 1989. As per French standard. Year not known. Current sharing many parallel paths. LEMP has minimal effects few parallel paths Experience Used for many decades without any problem. Used for many many decades without any problem. Grounding Ring earthing as per IS 3043 Down Conductor Installation time consuming but effective time consuming but effective less time consuming but ineffective Height limitation Taken care of using Expansion pieces. Not taken care Not applicable as it is based on vertical air terminal. Mateiral compatibility Taken care using bi-metal connector No specific mention in the standard. Not taken care. real - design is as per building type complying to IEC 62305-3. real - design is as per building type complying to IS 2309 Approved only in France which is their local standard Technique followed for the design of Air terminal Rolling sphere method which can be applied to any type of complex building. Only protective angle method & mesh method is available material used as Air terminal & down conductor 8mm Aluminium round which is easier to install, bend & needs less conductor holder. 25*3 GI is used which is difficult to install, bend & needs twice the amount of conductor holder. based on LPL 1 to 4 backed up by IEC 62305-1,2,4 also apart from IEC 62305-3 Applicability of latest standard Max. 2 parallel paths. High LEMP can damage Electronic equipments. App. 15 years old. In Malaysia many buildings with ESE was damaged. Proof available. Type B as per IEC 62305-1 (recommended for industries) Recommended only for small residences (not even apartments) where electronic equipment is not available. As per IEC 62305-3. More than one downconductor to dissipate the Lightning current to the ground (Multiple Dissipation) As per IS 2309. Less number of down conductors when compared to IEC 62305 as risk assesment was introducd in IEC in 2006. IS 2309 is based on 1989 which was re-affirmed in 1995 as it is, with out any change. In most of the site s, only one downconductor is installed,this is also not as per NFC 17102. Uses insulated cables which are very costly & not recommendd in any standard. No height limitation as the LPS is based on horizontal air terminal No height limitation as the LPS is based on horizontal air terminal Height restriction is applicable surrounding the airport area as ESE is based on Vertical air terminal. Expansion /contraction of metal in summer/winter
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Transcript of Iec 62305 vs Ese vs Is2309
Comparison between IEC/IS approved External LPS Vs NFC based ESE
Feature Faraday cage type Ext LPS as per IEC 62305 Faraday cage type Ext LPS as per IS 2309 ESE (Early Streamer Emission)
Coverage area real - design is as per building type complying to IEC 62305-3. real - design is as per building type complying to IS 2309 imaginary - no proof available .
Approvals IEC 62305-3 - International standard IS 2309 & IS 3043 - National standard. Approved only in France which is their local standard
Insurance cover Yes. Yes. No. Not approved by IS & CEIG
Only protective angle method & mesh method is available Not as per any international method.
Not as per any international method.
Design of LPS Based on Experience & old IEC, BS standards. Not as per any international method.
As per IEC 62305, Ed 2, released in 2010 As per 1989. As per French standard. Year not known.
Current sharing many parallel paths. LEMP has minimal effects few parallel paths
Experience Used for many decades without any problem. Used for many many decades without any problem.
Grounding Type B as per IEC 62305-1 (recommended for industries) Ring earthing as per IS 3043
Down Conductor
Installation time consuming but effective time consuming but effective less time consuming but ineffective
Height limitation
Taken care of using Expansion pieces. Not taken careNot applicable as it is based on vertical air terminal.
Mateiral compatibility Taken care using bi-metal connector No specific mention in the standard. Not taken care.
Technique followed for the design of Air terminal
Rolling sphere method which can be applied to any type of complex building.
material used as Air terminal & down conductor
8mm Aluminium round which is easier to install, bend & needs less conductor holder.
25*3 GI is used which is difficult to install, bend & needs twice the amount of conductor holder.
based on LPL 1 to 4 backed up by IEC 62305-1,2,4 also apart from IEC 62305-3
Applicability of latest standard
Max. 2 parallel paths. High LEMP can damage Electronic equipments.
App. 15 years old. In Malaysia many buildings with ESE was damaged. Proof available.
Recommended only for small residences (not even apartments) where electronic equipment is not available.
As per IEC 62305-3. More than one downconductor to dissipate the Lightning current to the ground (Multiple Dissipation)
As per IS 2309. Less number of down conductors when compared to IEC 62305 as risk assesment was introducd in IEC in 2006. IS 2309 is based on 1989 which was re-affirmed in 1995 as it is, with out any change.
In most of the site s, only one downconductor is installed,this is also not as per NFC 17102. Uses insulated cables which are very costly & not recommendd in any standard.
No height limitation as the LPS is based on horizontal air terminal
No height limitation as the LPS is based on horizontal air terminal
Height restriction is applicable surrounding the airport area as ESE is based on Vertical air terminal.
Expansion /contraction of metal in summer/winter
