There are many products of Hall current sensors. The shape and size of each type of sensor are different. Regardless of the type of current sensor, the wiring of the pins should be connected according to the measurement conditions.
(1) When measuring AC power, the bipolar power supply must be forced. That is, the positive (+) of the sensor is connected to the "+VA" terminal of the power supply, and the negative terminal is connected to the "-VA" terminal of the power supply. This connection is called a bipolar power supply. At the same time, the measuring terminal (M) is connected to the "0V" terminal of the power supply through a resistor.
(2) When measuring DC current, a unipolar or single-phase power supply can be used, that is, the positive or negative pole is short-circuited with the "0V" terminal, so that only one electrode is connected, and there are four connections.
In the sensor product, the "-N" mark indicates that the sensor has no power supply accidental inversion protection; the "-P" mark indicates that the sensor has protective measures.
(3) Connection method of sensor having shielding effect
Some current sensors have electromagnetic shielding, and there is one more "E" mark port on the product casing. There are two ways to connect them: connect the shield end to the negative (-VA) or neutral (0V).
In addition, the installation must take into account the product's purpose, model, range, installation environment. For example, the sensor should be installed as much as possible for heat dissipation; if the environment is only suitable for vertical installation, the sensor with the "V" mark must be selected.
