current transformer current transformer for metering metering ct current transformer for metering magnetic current sensor mesuring current transformer inductance current sensor for electric power current transformer mesuring current transformer inductance mircro amp current sensor low-voltage current sensor low-voltage current sensor low-voltage current sensor low-voltage current sensor current transformer for metering metering ct clamp-on current transformer low-voltage current sensor 50a hall current sensor low-voltage current sensor low-voltage current sensor closed loop current sensors current transformer to clamp-on current transformer closed loop current sensors clamp-on current transformer current sensor for electric power current transformer to low-voltage current sensor current transformer