Problem:

The figure below shows a $\frac{33}{11}kV$ power system supplying loads. Use standard Inverse overcurrent relays and find the current time multiplier setting TMS of relays $1$ B and $1$ C $.$ Allow for a $0\mathrm{.}4$ discrimination$/$margin between relays.

$1$ A setting $I_{\text{s}\text{e}\text{t}-A}=100\%,TM{S}_A=0\mathrm{.}1$

$1$ B setting $I_{\text{s}\text{e}\text{t}-B}=$

TMS ${?}_B=$

$1$ C setting $I_{\text{s}\text{e}\text{t}-C}=,TM{S}_C=$

$(5$ points$)$

$(5$ points$)$

OC Relay SI curve: Please solve using handwritting no typed solution is allowed

$t=\frac{0\mathrm{.}14}{I_{f}0\mathrm{.}02}**TMS$