A threc$-$phuse capactitor bank is rated at $\backslash (13\mathrm{.}8\backslash$mathrm$\{$kV$\},5\backslash )$MVA$.$ When it is disconnected from a bus, the line$-$to$-$linc bus voltage is observed to drop by $400$V $,$the change taking place through an oscillation. On one occasion, $7$ms after current interruption, the switch reignites. Calculate the peak magnitude and the frequency of the reignition current. In the switch interrupts this current at the first current zero, compute the voltage trupped on the capacitor bank.

What voltage will the bus swing to after this secund current interruplion?

It can be assumed that the cupacitor hank und source neutrals are both grounded.