What are the requirements when using a current sensor

Where to pay attention?

How much does a current sensor cost? Trustworthy. Beijing Huakong Xingye [Huakong Xingye nzznnds]

*Pay attention to the auxiliary power information on the product label. Do not connect the auxiliary power level and polarity of the transmitter incorrectly, otherwise it will damage the transmitter;

*Positive output can only be obtained when the current direction is in the same direction as the arrow marked on the product casing;

*The temperature of the primary busbar should not exceed 60 ℃. When the current busbar is filled with the primary threading hole, better measurement accuracy can be obtained;

*This series of transmitters does not have lightning protection circuits installed internally. When the input and output feeders of the transmitter are exposed to harsh outdoor weather conditions, lightning protection measures should be taken;

*The transmitter is an integrated structure that cannot be disassembled, and collision and drop should be avoided.

Use current

What should be paid attention to when using sensors?

In most cases, current sensors have strong resistance to external magnetic field interference. Generally, the magnetic field interference generated by a current twice the working current Ip between 5-10cm from the module can be ignored. However, when there is stronger magnetic field interference, appropriate measures should be taken to solve it.

The usual methods are: ① Adjust the module direction to minimize the impact of the external magnetic field on the module; ② Add a magnetic field resistant metal shielding cover on the module; ③ Select modules with dual or multiple Hall elements; ④ The measurement accuracy is obtained at the rated value. To obtain accuracy when the measured current is far below the rated value, multiple turns can be used on the primary side, that is, IpNp=rated ampere turns. In addition, the temperature of the primary feeder should not exceed 80 ℃.