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Surge protection in industrial enclosures

M. Joshi
What are the requirements for determining whether surge protection should be installed in industrial enclosures?  The enclosures will typically have motor drives, emergency stop systems and sensors/data acquisition.


Are Type 2 & 3 surge protection modules commonplace?
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    wallywombat:

    There's also the 10m guideline. Due to some sort of resonance effect that I don't profess to understand, a spike reduced to 1.5kV at a DB/SPD can double back up to 3kV at a point further than 10m downstream from the SPD. Which is one reason for having a type 2 SPD at each DB supplied by a submain from the main DB.


    WW, have you got a reference for that please? (I wouldn't even try to understand it all.)


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    wallywombat:

    There's also the 10m guideline. Due to some sort of resonance effect that I don't profess to understand, a spike reduced to 1.5kV at a DB/SPD can double back up to 3kV at a point further than 10m downstream from the SPD. Which is one reason for having a type 2 SPD at each DB supplied by a submain from the main DB.


    WW, have you got a reference for that please? (I wouldn't even try to understand it all.)


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