[en] A high-voltage nanosecond pulse generator designed for synchronous triggering of several sharping MV spark gaps is described. The generator comprises a low-inductive capacitive storage with a controllable gas-filled commutator, transmission system having several parallel connected cable lines, a circuit of commutator triggering, the main elements of which comprise an decoupling resistor a controllable gas-filled spark gap and a drive-pulse generator. It generates pulses with the amplitude of 300-200 kV, pulse rise of 7-20 ns when varying the common impedance of lines of the transmission system from 50 to 9 Ohm. The generator triggering system provides stability of triggering time ± 10 ns at induction of the decoupling circuit up to several dozens μH