Technical

Points on using AC current sensor

Points on using AC current sensor

·Do not use with open of the secondary side of CT.
·For the linear application, the high precision measurement can be done at the condition to use amplifier circuit for the secondary side of CT, when the load resistor is smaller.
·Using below the saturation current range in the figure of the characteristics is the necessary condition to get the good linearity.
·Please select the CT with bigger current ratio and the wider cross section of the core, in the case to expect the wide current range and high precision.
·Please have the margin about +/-30% of typical characteristics to operate, when it is used in the saturation area to get the enough output voltage.
·Please cancel the Vf of the diode with connection the load resistor to the DC side, in the case to get the DC voltage with rectifier circuit.
·Please select from the CTL-Z series for precise measurement, if it is used with small current and high load resistance.
·Even if the small current, the sensitivity becomes N times, when the measured wire is turned N times into the aperture of the CT
·The CT can't operate the analogue meter and relay basically, because the output of the CT of high current ratio is very small. Please check the compatibility of CT and load enough, when it is used in the limited condition.
· The detail of the specific example to use is written in the AC current sensor application circuit. Please refer them for the product's selection.