正常情況下，視在功率是指，容量固定不變，把視在功率看作圓的半徑，橫軸上投影是有功功率，縱軸上投影是無功功率，夾角就是功率因數角。當夾角為0時，功率因數為1，容量直接等于有功功率，那么當夾角為90°時，是什么情況呢？

The relationship between active power and reactive power

Under normal circumstances, apparent power refers to a situation where the capacity remains constant. Think of apparent power as the radius of a circle, with the projection on the horizontal axis representing active power and the projection on the vertical axis representing reactive power. The angle formed is the power factor angle. When the angle is 0, the power factor is 1, and the capacity is directly equal to the active power. So what happens when the angle is 90°?