As a technical standard, IEEE 80-2013 is a copyrighted document. There are several ways to access it legitimately:
Without the standard, you would never know the difference until the first fault kills a technician.
) based on human body resistance and the presence of surface materials like crushed stone. Initial Grid Design
It is vital to understand that is a guide ; however, it is recognized as the "State of the Art" by regulatory bodies.
Determine the minimum cross-sectional area of the grid conductors based on the maximum fault current and duration to prevent the wires from melting.
Amm2=I⋅1(TCAP104⋅tc⋅αr⋅ρr)ln(Tm−TaT0+Ta)cap A sub mm squared end-sub equals cap I center dot the fraction with numerator 1 and denominator the square root of open paren the fraction with numerator TCAP and denominator 10 to the fourth power center dot t sub c center dot alpha sub r center dot rho sub r end-fraction close paren l n open paren the fraction with numerator cap T sub m minus cap T sub a and denominator cap T sub 0 plus cap T sub a end-fraction close paren end-root end-fraction is the RMS fault current, is current duration, Tmcap T sub m is the maximum allowable conductor temperature, and Tacap T sub a
| | Year | Significance | |------------|----------|------------------| | AIEE Guide | 1961 | Original publication as AIEE Guide for Safety in Alternating-Current Substation Grounding | | IEEE Std 80 | 1976 | First IEEE edition | | IEEE Std 80 | 1986 | Second IEEE revision | | IEEE Std 80 | 2000 | Third major revision | | IEEE Std 80 | 2013 | Fourth major revision (current) |
The primary purpose of IEEE Std 80-2013 is to provide guidance for the design of grounding systems that keep electrical substation environments safe. Under normal conditions, a grounding system remains dormant. However, during a short-circuit or fault condition, massive amounts of current flow into the earth.
