METHOD OF DETERMINING REMAINING SWITCHING LIFE OF HIGH-VOLTAGE SWITCH Russian patent published in 2015 - IPC G01R31/327 

FIELD: electricity.

SUBSTANCE: current value of the commutation current I_com and the current value of the commutation voltage U_com are fixed for each phase at each switching. The commutation current is reduced to a rated voltage as per the following formula: I_t=I_com·U_com/U_rated, where I_t is the current reduced value of the commutation current. The value P_t of the current remaining life is calculated as per the formula P_t=(I_t/I_{o rated})². The calculated value of the current remaining life P_t is added to the earlier accumulated life of a high-voltage switch P_a for each of the phases. The obtained value of the remaining life is compared with a switching durability resource P_s for each of the phases.

EFFECT: improving accuracy for the determination of the switch remaining life.

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