M I The on-line calculation of the required temporary power N0= P0+j Q0 is a quite difficult task and should be the subject of further research work. ... The diagram shows that I m undergoes a beat and is reduced to about zero at intervals of about Is. This fact may facilitate the ... I The success of the HS-SPR requires of course that the switching overvoltages caused by the I -pole reclosure are withstood byanbsp;...