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Intrinsic Safety Assessment, EN60079-25 and non-linear Power Supply

thread797-310611

Intrinsic Safety Assessment, EN60079-25 and non-linear Power Supply

Intrinsic Safety Assessment, EN60079-25 and non-linear Power Supply

(OP)
I wounder if somebody can shade some light on how to determine whether a power source is linear or non-linear according to EN 60079-25. Many Thanks  
Replies continue below

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RE: Intrinsic Safety Assessment, EN60079-25 and non-linear Power Supply

A non-linear power supply draws power in pulses, like a switching supply.

Dan - Owner
http://www.Hi-TecDesigns.com

RE: Intrinsic Safety Assessment, EN60079-25 and non-linear Power Supply

That's certainly a novel view since most Linear supplies do that.

Keith Cress
kcress - http://www.flaminsystems.com

RE: Intrinsic Safety Assessment, EN60079-25 and non-linear Power Supply

Check the standard.

In the standard it looks more the term is used with regard to the relationship between current and voltage following an ohmic relationship, i.e. an unregulated source which could be modelled as an ideal cell with a series resistance.
  

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If we learn from our mistakes I'm getting a great education!
 

RE: Intrinsic Safety Assessment, EN60079-25 and non-linear Power Supply

Keith,

I think the intent was PWM versus 60Hz sine...

Dan - Owner
http://www.Hi-TecDesigns.com

RE: Intrinsic Safety Assessment, EN60079-25 and non-linear Power Supply

I'll never know because I'm not giving the thieves 2oo bucks for a standard.

Keith Cress
kcress - http://www.flaminsystems.com

RE: Intrinsic Safety Assessment, EN60079-25 and non-linear Power Supply

Ha-ha, yeah it's pretty steep isn't it, especially for a set of standards which are all but mandatory to comply with the ATEX Directive.
  

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If we learn from our mistakes I'm getting a great education!
 

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