Regarding capacitance and rated power issues
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This post was last edited by zhaohh3211 on 2010-10-22 at 16:07. Dear experts, I’m not very clear about the relationship between the capacitance of a device and its rated power. I would appreciate some guidance from professionals: Can the sum of the rated powers of the devices be considered as the apparent power? If not, then what is the specific connection between the installed capacity and the rated power of the equipment? (Apart from the power factor)
The terms used by the original poster need to be properly standardized: 1. Capacitance: refers to the capacity of a capacitor. What the original poster means is the capacity of the electrical equipment. The capacity of electrical equipment must never be simply referred to as the equipment’s capacitance. 2. What is the power factor? There is no such term; only the power factor! Regarding the original poster’s question, it’s best to find a book on electrical engineering and study it carefully*; it will provide clear explanations.
First, we need to see what electrical equipment is available. The capacity of a transformer is expressed in VA, that is, it is based on apparent power as its capacity. Due to its capacitive load, a capacitor is measured in Var, which represents reactive power. Most other electrical devices are inductive loads, so what matters to us is their active power; therefore, the unit is W.
I’ve learned a lot. . Thank you for the reminder. .