[en] The characteristics of a pulse power system using a homopolar generator (HPG) and single-shot, explosive circuit breaker are described. The breaker conducts for several seconds while the self-excited HPG energizes a 1.5 mH inductor. The opening breaker then commutates the 20-kA current into load resistance of less than 0.6 /OMEGA/ within tens of microseconds with an energy transfer efficiency of 99%. When larger load resistance is used, current commutation is assisted by a parallel fuse. The open breaker withstands the voltage pulse of 40-kV peak and 750-/mu/s decay obtained from a 2-/OMEGA/ load. These experiments demonstrate the feasibility of using inertial current sources for inductive generation of terawatt output pulses. 10 refs