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What problems exist in the application of smart meters

                       
Update:03-09-2020
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What problems exist in the application of smart meters […]

What problems exist in the application of smart meters

The smart meter industry is one of the most widely used shunts, and there are different types of shunts on each smart meter. The shunt is usually installed in a smart meter with a screw hole design. It is precisely because of this design that the shunt has single phase meter shunt many problems that need to be solved in the meter.

80A three-phase meter relay

Shunts usually perform current sampling on smart meter circuits. In the connection between the relay shunt and the terminal, a screw hole with a diameter of 4 to 5 mm is punched in the shunt and the terminal, and then the physical is carried out by screws and elastic metal washers. link. Due to the existence of perforations, the current cross-sectional area of ​​the shunt metal conductor will decrease, the internal conductivity will inevitably decrease, and the resistance will increase.

In addition, even though the screws and gaskets used to connect the shunt are made of metal materials, due to their different metal materials, it is difficult to ensure good conductivity; and during the transportation of the smart meter, due to road bumps and vibrations, etc. , The screw contact is likely to become loose. After loosening, the shunt and the terminal become a bad contact. These reasons will cause the resistance of the connection to increase. These factors are some of the problems that shunts need to solve in smart meters.