Comparison between IEC/IS approved External LPS Vs NFC based ESE of HSBC Vizag as per ELPS - IV Feature Coverage area

Faraday cage type Ext LPS ESE (Early Streamer Emission) real - designed as per building type complying to IEC imaginary - no proof available . 62305-3 & IS 2309/IS 3043

Approvals

Not approved by scientists/IEC/IS. "Approved" only in IS, CEIG & IEC 62305-3 - International (IEC 62305) & which is their local standard, however approval National (IS & CEIG) document is not available with any of the vendor. NFCNational French Code not applicable in India.

Insurance cover

Yes. As it is approved by IS & CEIG

Current sharing

many parallel paths. LEMP has minimal effects

Fool proof method

Yes. Back up from International & national std. available. Also test setups are available for Faraday Cage testing.

Experience

Used for many many decades without any problem.

Grounding

Down Conductor Installation

Type B as per IEC 62305-1 (recommended for industries) As per standard. More than one downconductor to dissipate the Lightning current to the ground (Multiple Dissipation) ie 10 downconductor is needed time consuming but effective

No. Not approved by IS & CEIG Max. 2 parallel paths. High LEMP can damage Electronic equipments. Imaginary Just 10 years old. In Malaysia many buildings with ESE was damaged. Proof available. Recommended only for small residences (not even apartments) Only in the site one downconductor is there, this is also not as per NFC 17102 less time consuming but ineffective

LEMP : Lightning Electro Magnetic Pulse caused by high current flow due to direct lightning strike.