A power circuit protection system comprising: a current sensor configured to measure a first current level through a conductor of a plurality of conductors of the circuit ; a voltage sensor configured to measure a first voltage level across two of the plurality of conductors of the circuit including the conductor of the plurality of conductors through which the current is measured; a switch configured to select sensitivity settings of the circuit ; and a controller communicatively coupled to said current sensor , to said voltage sensor and to said switch, said controller being configured to: receive a first signal from said current sensor , wherein the first signal is representative of the first current level; receive a second signal from said voltage sensor , wherein the second signal is representative of the first voltage level; compare the first current level to a threshold current level selected based on the sensitivity setting; compare the first voltage level to a threshold voltage level selected based on the sensitivity setting; measure a first time interval between determining that the first current level is higher than the threshold current level and determining that the first voltage level is higher than the threshold voltage level; compare the first time interval to a predefined time interval; and activate a first circuit protection device comprised by the power circuit protection system when the first time interval is less than the predefined time interval. a current sensor configured to measure a first current level through a conductor of a plurality of conductors of the circuit ; a voltage sensor configured to measure a first voltage level across two of the plurality of conductors of the circuit including the conductor of the plurality of conductors through which the current is measured; a switch configured to select sensitivity settings of the circuit ; and a controller communicatively coupled to said current sensor , to said voltage sensor and to said switch, said controller being configured to: receive a first signal from said current sensor , wherein the first signal is representative of the first current level; receive a second signal from said voltage sensor , wherein the second signal is representative of the first voltage level; compare the first current level to a threshold current level selected based on the sensitivity setting; compare the first voltage level to a threshold voltage level selected based on the sensitivity setting; measure a first time interval between determining that the first current level is higher than the threshold current level and determining that the first voltage level is higher than the threshold voltage level; compare the first time interval to a predefined time interval; and activate a first circuit protection device comprised by the power circuit protection system when the first time interval is less than the predefined time interval. receive a first signal from said current sensor , wherein the first signal is representative of the first current level; receive a second signal from said voltage sensor , wherein the second signal is representative of the first voltage level; compare the first current level to a threshold current level selected based on the sensitivity setting; compare the first voltage level to a threshold voltage level selected based on the sensitivity setting; measure a first time interval between determining that the first current level is higher than the threshold current level and determining that the first voltage level is higher than the threshold voltage level; compare the first time interval to a predefined time interval; and activate a first circuit protection device comprised by the power circuit protection system when the first time interval is less than the predefined time interval. <EOS>