Difference Between KVA and KW in Industrial Control Systems

In AC Circuits, there are three concepts of electrical power: active power, reactive power, and apparent power. KVA stands for apparent power, which includes reactive power and active power, KW stands for active power, and Kvar stands for reactive power. There is also a concept of the relationship and conversion between them – power factor cosФ, active power KW=UIcosФ, reactive power Kvar=UIsinФ, and apparent power KVA=UI. (U-voltage, I-current).

What’s the difference between this and the ones written in our school books? If you just say this, will you be in a fog? Honestly, I’m just, half-knowing. There is a lot of knowledge when there is no practical use, only knowledge. The generator does work by itself, so it uses KW, and the transformer just changes one voltage into another, it does no work by itself, so KVA is used.

Electricity is divided into direct current and alternating current. In direct current, you are just like those upright people. No matter what, you have been diligent and diligent. The alternating current is more cunning, sometimes east, and now west. If you have a chance, you can drill. If you encounter a boss with high resistance (power factor of resistive loads such as incandescent light bulbs, resistance furnaces, etc. is 1), you will be more honest, and your output will be more. Once the boss is a more perceptual boss (with an inductive load The power factor of the Circuit is less than 1), it will start to grind foreigners, or it will not work, or it will distribute a part of the power to the invisible space during the working time.

For example, look at WeChat, swipe online shopping or something. Of course there is less useful output. Of course, generally it will not do too much, 85% of the force is still out. Of course, if the perceptual boss is paired with a taskbar like a KPI (like shunt capacitors, etc., which can compensate for reactive power to improve power factor) anyway, it’s ultimately task-oriented.

It is not a simple summation, but needs to analyze each of your loads, whether it is purely resistive or inductive. At the same time, it also needs to consider the coefficients used at the same time. It is impossible for all devices to be at the peak of power consumption at the same time. of. Then substitute the power factor, and consider a certain margin and spare capacity, choose a large one or a small one. This is how you end up getting what you want.

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