METHOD TO DETERMINE MOMENT OF TIME OF SWITCHING OF ELECTRIC SWITCHING DEVICE Russian patent published in 2014 - IPC H01H33/44 H01H9/56 

FIELD: electricity.

SUBSTANCE: time characteristic of voltage is determined, established in a gap (1) within the sample time interval (t1). From the time characteristic they determine resonant frequency of an oscillating circuit, and a time window is determined from it (Δt). The moment of switching time is set by definition of a transition via zero of an envelope in the future characteristic calculated on the basis of a time characteristic, after a time interval (t2) following the process of disconnection, in the time window (Δt). In the alternative version of the method the moment of time of switching is set by determination of weighted transition through zero in the time window (Δt) after the time interval (t2) following the process of disconnection.

EFFECT: definition of an optimal moment of time of switching for minimisation of transition overvoltages.

2 cl, 3 dwg