CPC H02H 3/087 (2013.01) [H01H 33/596 (2013.01); H02H 1/0007 (2013.01)] | 20 Claims |
1. A circuit protection apparatus for interrupting a direct-current (DC) fault current in a DC power system, the circuit protection apparatus comprising:
a momentary circuit interrupter including a plurality of capacitors and operable in combination with a DC circuit branch of the DC power system to reduce a DC fault current to a near zero-current condition upon a fault current state in the DC circuit branch, the momentary circuit interrupter further including a pulse transformer connectable to the DC circuit branch and operable to inject a transient voltage from the capacitors to DC circuit branch to reduce the DC fault current to the near zero-current condition, wherein the momentary circuit interrupter operates in a pulse width modulation mode to hold the DC fault current to a near-zero alternating-current (AC) ripple current condition for a period of time.
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