Current transformer T60404-E46 series

dryfor electronicsfor energy meters

CURRENT TRANSFORMERS FOR ELECTRONIC ENERGY METERS The key component in smart meters is the current transducer. There is a number of functional principles for implementation of the current transducer. The shunt resistor is a favourite choice because of its very low cost and good linearity, but designers have to be aware of its disadvantages. Because of the regulations concerning maximum power consumption (2W per phase acc. to IEC 62053 -21, -23), its resistance is limited to some hundreds of µ. This low value results in very low secondary voltages at low primary currents.