What power acceptability curve best handles reality?

[Illtrick]

I've been doing some research to help our some EE's who are building out some power equipment. They brought up the CBEMA curve as a "standard" by which to define the probable electrical input conditions that they'd need to handle. I don't have the background to answer the question for them explicitly but my gut tells me it might be insufficient to represent the variability in the modern day world as it's derived from older data. What do you guys use when planning out input variability?

 

[antcollinet]

I've been doing some research to help our some EE's who are building out some power equipment. They brought up the CBEMA curve as a "standard" by which to define the probable electrical input conditions that they'd need to handle. I don't have the background to answer the question for them explicitly but my gut tells me it might be insufficient to represent the variability in the modern day world as it's derived from older data. What do you guys use when planning out input variability?

International product specific standards - such as

IEC 61800-1:2021 | IEC Webstore

IEC 61800-1:2021 Standard | Adjustable speed electrical power drive systems - Part 1: General requirements - Rating specifications for low voltage adjustable speed DC power drive systems

webstore.iec.ch

(The product standard for variable speed drives)

These standards will often reference other more generic standards for such things as power supply compliance.

 

[Illtrick]

International product specific standards - such as

IEC 61800-1:2021 | IEC Webstore

IEC 61800-1:2021 Standard | Adjustable speed electrical power drive systems - Part 1: General requirements - Rating specifications for low voltage adjustable speed DC power drive systems

webstore.iec.ch

(The product standard for variable speed drives)

These standards will often reference other more generic standards for such things as power supply compliance.

Thanks. I'll see if there's some references there. Curious if what mains voltage sag / duration of sag most people are engineering to for North America.