Is the rated power wattage be actually wattage?

Multiplion "h" by power "W" can get the power "WH". And 1000WH is what we often say "KWH". However, the rated power is not equal to the actual power, and the actual working time of most electrical appliances is also uncertain, and the two uncertain numbers are multiplied together, and the result is of course not accurate. Many electrical appliances are marked with rated power parameters. It is the power required to maintain the normal operation of the electrical appliance under the rated voltage. But it can't be completely painted with the actual power of the appliance. Because the actual power of the electrical appliance is subject to many factors. The first is the voltage factor. For electrical appliances such as a pure resistance, such as incandescent lamps, electric heaters, electric blankets, etc., their actual power and the square of the voltage are proportional. If there is a 220V1000W electric heater, the voltage rises to 260V, the power is 260V2 ÷ (220V2 ÷ 1000W) = 1396W. Although the switching power supply and the motor class cannot be directly measured by the above method, the effect of voltage on the power is also very large. Furthermore, it is the power change caused by the change in electrical load. For example, the flashlight is different when playing 2mm holes and 10mm, the electric refrigerator or air conditioner is not the same as the power consumption when the start and fast stop, the computer is not the same as the normal Internet and running large games ... Wait. In addition, many electrical appliances are intermittent, such as refrigerators, fixed frequency air conditioners, and electric water heaters. When they reach the desired temperature, they will automatically stop, and the temperature changes will be started again. The picture below is a 225L refrigerator's energy consumption, in fact, its compressor has more than 100 watts, if it works for eight or nine hours in a row, it is only 0.48 degrees 24 hours. This is caused by intermittent work. But this is likely that it is still inconsistent with your actual power consumption, because it affects power consumption. Therefore, it is difficult to accurately measure the power consumption of the electrical appliance and can only be a rough estimate. Read more

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