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### Intermediate Average Arcing Current Equation and Calculator per IEEE 1584-2018

Electrical and Electronics Design and Engineering

Intermediate Average Arcing Currents Equation and Calculator per IEEE 1584-2018

This calculator and equation will determine the arcing current at the open circuit voltage. Requires premium membership account to access calculator.

Related: Where:

Iaoc_Voc = Average RMS arcing current at the voltage level
Ibf = Bolted fault current for three-phase faults (symmetrical rms) (kA)
G = Conductor gap distance between electrodes (mm)
k1 to k10 = coefficients provided in Table A given below
lg = log10

VCB: Vertical conductors/electrodes inside a metal box/enclosure
VCBB: Vertical conductors/electrodes terminated in an insulating barrier inside a metal box/enclosure
HCB: Horizontal conductors/electrodes inside a metal box/enclosure
VOA: Vertical conductors/electrodes in open air
HOA: Horizontal conductors/electrodes in open air

Table A - Coefficients for Equation

 E.C. / Voc k1 k2 k3 k4 k5 k6 k7 k8 k9 k10 VCB 600 V −0.04287 1.035 −0.083 0 0 −4.783E-09 1.962E-06 −0.000229 0.003141 1.092 2700 V 0.0065 1.001 −0.024 −1.557E-12 4.556E-10 −4.186E-08 8.346E-07 5.482E-05 −0.003191 0.9729 14300 V 0.005795 1.015 −0.011 −1.557E-12 4.556E-10 −4.186E-08 8.346E-07 5.482E-05 −0.003191 0.9729 VCBB 600 V −0.017432 0.98 −0.05 0 0 −5.767E-09 2.524E-06 −0.00034 0.01187 1.013 2700 V 0.002823 0.995 −0.0125 0 −9.204E-11 2.901E-08 −3.262E-06 0.0001569 −0.004003 0.9825 14300 V 0.014827 1.01 −0.01 0 −9.204E-11 2.901E-08 −3.262E-06 0.0001569 −0.004003 0.9825 HCB 600 V 0.054922 0.988 −0.11 0 0 −5.382E-09 2.316E-06 −0.000302 0.0091 0.9725 2700 V 0.001011 1.003 −0.0249 0 0 4.859E-10 −1.814E-07 −9.128E-06 −0.0007 0.9881 14300 V 0.008693 0.999 −0.02 0 −5.043E-11 2.233E-08 −3.046E-06 0.000116 −0.001145 0.9839 VOA 600 V 0.043785 1.04 −0.18 0 0 −4.783E-09 1.962E-06 −0.000229 0.003141 1.092 2700 V −0.02395 1.006 −0.0188 −1.557E-12 4.556E-10 −4.186E-08 8.346E-07 5.482E-05 −0.003191 0.9729 14300 V 0.005371 1.0102 −0.029 −1.557E-12 4.556E-10 −4.186E-08 8.346E-07 5.482E-05 −0.003191 0.9729 HOA 600 V 0.111147 1.008 −0.24 0 0 −3.895E-09 1.641E-06 −0.000197 0.002615 1.1 2700 V 0.000435 1.006 −0.038 0 0 7.859E-10 −1.914E-07 −9.128E-06 −0.0007 0.9981 14300 V 0.000904 0.999 −0.02 0 0 7.859E-10 −1.914E-07 −9.128E-06 −0.0007 0.9981

Reference:

IEEE 1584-2018

Verify results and send feedback if a discrepancy is found. 