There are various technical specificat♔ions and terms for current sensors. Have you understood them? Below we will provide you with a detailed explanꦑation one by one.

1. Rated current: The effective value of a lꦬarge current continuously flowing through the sensor under certain conditions. The vari♛ous model names of current sensors are defined based on the DC peak size. DC current: effective value=peak; AC current: effective value=peak/1.414.

2. Sensor bandwidth: The output capacity of the measured current at different frequencies on the secondary side of the sensor. The freq🏅uency of 3dB broadband refers to the frequency at which the amplitude of the output signal decays to 0.707 🥂of the input signal amplitude. 3dB=20log (measured value/standard value)

3. Zero♚ drift: The default initial value of the sensor every time it is powered on.

4. Temperature drift: The amount of change caused by each de♎gree of temperature ch🎐ange during normal operation of a sensor.

5. Time drift: 𓄧The amount of change in the output of a sensor 𝄹caused by changes in usage time.

6. Accuracy: L✱arge error when measuring rat🍃ed current.

7. Working volta♎ge: The voltage required for the current sensor to operate

Measure the DC accuracy of current from 1500A to 10ಞA, and analyze the AC accuracy of current from 1060A to 10A.

1. Test environment construction:

(1) Place the IIT150𒀰0 current sensor under test and wind the current wire flowing through IIT1500 for 20 turns. The transformation ratio of the tested sensor IIT1500 is 1000:1. Therefore, when the current line flows through a 5A current, due to winding 20ꦅ turns, the equivalent measured current of the tested IIT1500 is 100A, and the secondary output current of the sensor is 0.1A.

(2) Place the standard sensor AIT1000SG current sensor and wind the current wire flowing through AIT1000SG for 10 turns. The conversion ratio of the stan🐻dard sensor AIT1000SG is 1500:1. Therefore, when the current line flows through a 5A current, due to windinꦑg 10 turns, the equivalent measured current of the standard current sensor AIT1000SG is 50A. At this time, the secondary output current of the sensor is 0.0333A.

(3) Use the DC power source ITN6512D to output DC current. The positive output current of the current source flows through the tested current sensor IIT1500 (with 20 turns of current wire winding), and then the test wire is led out and flows through the standa✤rd current sensor AIT1000SG (with 10 turns of current wire winding), and then returns to the negative electro🌳de of the DC power source ITN6512D. Therefore, when the power source outputs current, the voltage values output from the secondary side of the standard sensor and the measured sensor should theoretically be consistent.

(4) Use the AC power source HZ601 to output AC current. The positive output current of the current source ⛄flows through the tested current sensor IIT1500 (with a current wire wrapped for 20 turns), and then the test wire is led out to flow through the standard current sensor AIT1000SG (with a current wire wrapped for 10 turns), before returning to the negative electrode of the AC power source HZ601. Therefore, when the power source outputs current, the voltage values output from the secondary side of the standard sensor and the measured sensor should theoretically be consistent.

(5) Weld the output end of the standard current sensor with a 3-ohm resistor (accuracy 0.1%, temperature drift ± 5ppm), convert the output current of the current sensor into an output voltage, weld the output end of the measured current sensor with a 1-ohm resistor๊ (accuracy 0.1%, temperature drift ± 5ppm), and conv✱ert the output current of the current sensor into an output voltage for comparison. Connect the output voltage of the measured sensor to the front end of FLUKE8558A voltage measurement, and connect the output voltage of the standard sensor to the back end of FLUKE8558A voltage measurement. Compare the error through the ratio measurement function of the eight and a half digit multimeter FLUKE8558A.

2. Test steps and methods:

(1) Set the ratio measurement on the eight and a half digit multimet🍌er FLUKE8558A, set the resolution to 8 digits, set the voltage gear to automatic gear, and press the Input key to set the ratio measurement method for the front-end input voltage and back-end input voltage.

(2) Control the DC power source to output different measured current values. After the current source stabilizes, use an eight and a half digit multimeter FLUKE8558A to measure the ratio between the output voltage of the measured se💧nsor and the output voltage of the standard current sensor, and record it.