How To Choose The Capacity of Household Electricity Meter？(2)
How to choose a smart household energy meter?
The use of household appliances in the family requires electricity, and the electricity needs to be measured, and the electricity meter must be used to measure the electricity. How to choose the right watt-hour meter? The selection of the watt-hour meter should be determined according to the load. That is to say, the capacity or current of the selected watt-hour meter is determined according to the size of the load in the calculation circuit. If the capacity or current is selected too large, the watt-hour meter cannot rotate normally, which will affect the accuracy of the measurement results due to its own errors. If the capacity or current selection is small, there is a possibility of burning the watt-hour meter. Generally, the total load power of the selected watt-hour meter should be 1.25 to 4 times the actual total power consumption. Therefore, before selecting the capacity or current of the watt-hour meter, it should be calculated first. For example, 4 lamps for household use, about 120 W. When using electrical appliances such as TVs and refrigerators, it is about 680 W. Try the current capacity of the watt-hour meter. From this, we get: 800×1.25=900(w) or 800×4=3200(W), and the load wattage of the watt-hour meter used is between 900 and 3200 W. It is more appropriate to choose a current capacity of 10 to 15 A.
When choosing a watt-hour meter, in addition to considering the current capacity, it is also necessary to pay attention to the inherent quality of the meter, especially whether the lead seal on the watt-hour meter case is damaged. Generally speaking, the watt-hour meter should be checked for accuracy before leaving the factory. After passing the inspection, seal the detachable parts of the watt-hour meter, and users are not allowed to open the seal without permission. If the lead seal is damaged, it must be re-calibrated by the relevant department before it can be used.
