What is the difference between Hall current sensor, transformer, and shunt
Hall current sensor: It is a sensor that uses the Hall effect to convert a large current into a secondary tiny voltage signal. Actually designed Hall sensors often amplify weak voltage signals into standard voltage or current signals through circuits such as operational amplifiers. The Hall current sensor manufactured by the above principle is called a direct-detection Hall current sensor or an open-loop Hall current sensor.
Current transformer: It is an instrument that converts a large current on the primary side into a small current on the secondary side based on the principle of electromagnetic induction. It mainly measures AC signals.
Shunt: It is used to measure the flow of current. It is made according to the principle that a voltage is generated at both ends of the resistor when a DC current passes through the resistor.
The difference between the three:
(1) All of the three convert large current signals into small signals for measurement, and the principles are different, as described above;
(2) The measurement objects are different. Hall current sensors can measure AC and DC; transformers can only measure AC; shunts can measure AC and DC. The specific measurement performance, accuracy, measurement range and other indicators are related to process and design;
(3) Hall current sensors are widely used for AC and DC signal measurement and pulse signal measurement; transformers are used for AC signal measurement, especially power frequency high current; shunts have more industrial applications in DC, and AC shunts in the field of measurement have applications.
(4) Hall current sensor output is current or voltage signal, current transformer output is a current signal, shunt output is voltage signal