Max continuous OV for a 13.8kV system

[veritas]

I live in the IEC world and am now on a US based project.

Simple question - what is the maximum continuous overvoltage allowed for a 13.8kV and 480V mining system? What standard governs this?

Thanks.

 

[magoo2]

It should be 5% maximum overvoltage based on the 13.8 kV rating. Refer to ANSI C84.1.

 

[veritas]

Thanks.

 

[stevenal]

C84.1 deals with acceptable voltage levels for equipment. If you're looking arrester ratings, see the IEEE C62 series.

 

[veritas]

By the way, what is the relationship between NEMA, MSHA, NFPA, NEC and ANSI? I am aware that ANSI is the standard institute but not so sure where the others fit in.

Thanks.

 

[catserveng]

Does this help?

https://eandm.com/ExtraContent/Products/Content/Siemens/Training/Siemens_Courses/mcc_2.pdf

 

[veritas]

Yes, it sure does help. Thank you.