WBI417S91 converts AC input current into a load independent output signal RMS (0)4-20mA. It has adopted electromagnetic isolation principle for real time measurement of AC current from electric net or electric circuit.
The product has certain advantages of total galvanic isolation between input/output, high accuracy, low drifting by temperature, and wide temperature bearable range, etc.
It is suitable for current isolation measurement of sine wave and non-sine wave (rectangular wave, triangular wave, sawtooth wave and other large distortion waveform).
Basic testing method for accuracy
(1) According to the terminal definition table to connect the testing circuit;
(2) The testing must be done by under the following conditions;
Auxiliary power: 24V±5％,ripple≤5mV
Ambient temperature: 25℃±5℃
Relative humidity: RH(45～75)％
Accuracy for Signal Power Source instrument: 0.05
(3) Warming up the transducer for 3 minutes
(4) Using output monitoring meter V1 to measuring the output of signal power source instrument, set a any input value which is within the measuring range of the transducer Ir (e.g. if input value is 5A, the output is 4mA～20mA, the expected output value Iz should be calculated as:
Iz = (20mA－4mA)×Ir/5A＋4mA
(5) Using output monitoring meter V2 to measuring the output voltage Uo of the transducer, the basic introduced error γ of the transducer should be calculated as:
γ= (Uo－Iz×250Ω)/[(20mA－4mA)×250Ω]×100
(6) Repeating step (4) (5), if calculated absolute value is less than the given accuracy value of the transducer, it shows the transducer's accurate grade is qualified.
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Input: AC 0~50A
Output: RMS 0-20mA or 4-20mA DC
Accuracy: Class 0.2
Auxiliary Power: +12VDC/+24VDC
Responding Time: 300ms
Over Load Capacity: 30 times of nominal input, 5 seconds
Drifting by Temperature: 50×10-6/℃
Ambient Temperature: 0℃~50℃
Mounting: DIN rail 35mm mount or screw mount.
