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I have seen on my last couple projects Generator NGR's normally rated for 200A 10 seconds. My question is … is it common to get a longer duration rating for these industrial NGR's? i.e. instead of 10 seconds, get a rating of 60 seconds or even continuous to allow other generators to come...

Great question... I've included a snippet of API 541's section in reference:

I am reviewing a quotation from a vendor that wishes to deviate from API 541's TEWAC performance requirements. (API 541 section 4.4.1.2.4) API 541 requires TEWAC's to have the following performance thresholds: Maximum temperature rise 17k Minimum temperature rise 11k The vendor is wanting...