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Topic Title: IEC 62305-4 in petrochem industry
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Created On: 03 May 2013 10:59 AM
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 03 May 2013 10:59 AM
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Posts: 1
Joined: 06 September 2012

Hi All,

Has anybody had any recent experience in dealing with IEC 62305 Ed 2- 2010 with regard to surge protection in a petrochemical environment. In particular some questions;

If the risk assessment generates a lightning protection level of 2 does the co-ordinated surge protection have to be Type 1-Type 2 regardless.

Is surge protection required on every line/cable including control/instrumentation lines.

Thanks in advance.
 07 May 2013 04:25 PM
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Joined: 25 July 2008


With this been a petrochemical environment does any parts come involved with ATEX regulations. If so you will also need to meet there requirements.

Surge protection should be fitted on all incoming lines including data/signal and power lines. (Control/instrumentation)

If your risk assessment has generated a lightning protection level 2, and needing a structural lightning protection system. Then SPDs are required to be fitted. The lightning protection level 2 means you still need a type 1 protector but can have a rating of 18.75kA 10/350us; these are hard to come by so you will most likely use the same as a lightning protection level 1 at 25kA 10/350us.

hope this makes some sense

There is some literature on the standards here:

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