Commutating type DC circuit breaker arrangement

A commutating type DC circuit breaker arrangement comprising:

• a vacuum circuit breaker having a movable electrode and a stationary electrode;
• a series circuit of a capacitor, a saturation reactor and a commutating switch connected in parallel with said vacuum circuit breaker;
• and
• a detecting and closing means for detecting an actual physical predetermined electrode open position of said movable electrode at which a sufficient insulating distance between said movable electrode and said stationary electrode is maintained, such detecting being conducted with respect to a physical movement of a predetermined position on an actuating rod for said movable electrode and for closing said commutating switch in response to detection of said predetermined electrode open position.