What is the maximum earth loop impedance Zs values for ILine MCCB SFAL & SFHL?

Please find attached the maximum earth loop impedance  Zs values for SFAL & SFHL MCCBs

In order to comply with BS7671 Amendment 3: 2015 the figures in the chart should be multiplied by Cmin .95

Z_s - is the maximum earth fault loop impedance.
Uo - is the nominal voltage to earth (for a 400V 3 phase system this is 230V).
l_a - is the current causing the operation of the circuit breaker in less than 0.4 seconds.
C_min is the minimum voltage factor to take account of voltage variations depending on time and place, changing of transformer taps and other considerations. (C_min= 0.95)
in order to comply with BS7671 Amendment 3: 2015 the figure in the table should be multiplied by Cmin .95

Released for:Schneider Electric UK