허용접촉전압과 허용 보폭전압의 식과 산출근거

\[R_b=1,000,R_f=3C_s\rho_s\]

\[E_{step}\le(R_b+2R_f)\times\frac{0.116}{\sqrt t}\]\[=(1,000+6C_s\rho_s)\times\frac{0.116}{\sqrt t}\] \[=\frac{116+0.696C_s\rho_s}{\sqrt t}[V]\]

\[E_{touch}\le(R_b+\frac{R_f}{2})\times\frac{0.116}{\sqrt t}\] \[=(1,000+1.5C_s\rho_s)\times\frac{0.116}{\sqrt t}\] \[=\frac{116+0.174C_s\rho_s}{\sqrt t}[V]\]

\[R_b=1,000,R_f=3C_s\rho_s\]

\[E_{step}\le(R_b+2R_f)\times\frac{0.157}{\sqrt t}\]\[=(1,000+6C_s\rho_s)\times\frac{0.157}{\sqrt t}\] \[=\frac{157+0.94C_s\rho_s}{\sqrt t}[V]\]

\[E_{touch}\le(R_b+\frac{R_f}{2})\times\frac{0.157}{\sqrt t}\] \[=(1,000+1.5C_s\rho_s)\times\frac{0.157}{\sqrt t}\] \[=\frac{157+0.24C_s\rho_s}{\sqrt t}[V]\]