Touch voltage calculation
Touch voltage calculation
(OP)
Hello my friends,
I am struggling to calculate touch, step and GPR according to IEEE std 80, 2000.
soil resistance: 2500 OHM*M
fault current : 10kA
current division factor : 20%
Can I calculate standard and calculation values above without using software ?
The result is quite strange to me, I am wodering now. While calculating, I do not how to figure out surface layer deration factor(Cs), irregularity factor(Ki=0.644+0.148n). What is the differnce rho and (rho)s in the Cs equation. Is Ki equation only one?
Thanks
James
I am struggling to calculate touch, step and GPR according to IEEE std 80, 2000.
soil resistance: 2500 OHM*M
fault current : 10kA
current division factor : 20%
Can I calculate standard and calculation values above without using software ?
The result is quite strange to me, I am wodering now. While calculating, I do not how to figure out surface layer deration factor(Cs), irregularity factor(Ki=0.644+0.148n). What is the differnce rho and (rho)s in the Cs equation. Is Ki equation only one?
Thanks
James






RE: Touch voltage calculation
RE: Touch voltage calculation
Thank for your great information. It was very useful to solve my problem.
James
RE: Touch voltage calculation
After calculating the step and touch voltage, the touch is higher than step voltage. As far as I know, step voltage should be higher than touch voltage. What am I missing now?
I highly appreciated if you comment about that.