[piercent]

Not sure if this will help but Eaton just released an article http://www.newark.com/images/en_US/marketing/pdf/ondemand092011/Protection.pdf?ICID=onDemand09011_Protection covering the characteristics of IEC style circuit breakers specifically for examining them in the context of UL / CSA requirements.  Also, here is the main circuit breakers which may also be helpful.

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