What is meant real and reactive
Why should a device be used as a power supply instead of the watt (W)?
Here is an example: I have a device with an apparent power of 10 VA cosϕ = 0.7. It uses P. = S. ∗ cosϕ = 0.7 ∗ 10 W. = 7 W.. On the other hand, it also uses Q = S. ∗ sinϕ = 0.714 ∗ 10 = 7.14 W..
We could then add these two together as they both consume 7W and 7.14W at the same time and get 14.14W which is obviously wrong as the device never consumes more than 10W even if its power factor was somehow corrected back to 1.
Basically, var is used to indicate that reactive power is out of phase with active power and that you cannot add it up. On paper, power is power, but through the use of var (sometimes mistakenly called VAr, so r is not just appended, but is part of some other unit, the name of which is often misspelled), volt-amps, and watts, let's hope ( at least) to) clearly identify the context in which this unit is used. Var means not only size, but also phase.
This is actually nothing new and is also common in other areas. For example, we have radians and steradians as the units of measure for angles, which are actually 1. The same also applies to bits. Although we can technically say that the speed of a communication link is 1 MHz, this implies a different context than 1 Mbit / s.
- Will Windows 10 slow down my PC
- Is a pitch deck confidential
- What are the facts about childhood cancer
- What waste can occur in a restaurant
- How do I paint wood
- Which engineering stream has the greatest scope
- Can ICMA take over a CA company
- What is a dark pool
- Will a narcissist reveal an affair
- How safe is Oregon
- Have extraterrestrial human rights
- How does a confident person deal with mistakes
- How do I start mining old coins
- What is optimization in business
- Are there apple orchards in Florida
- Can we talk to our dead?
- What do mortal enemies mean
- How is college life at CUSAT
- How can I convert ethanal to propanone
- How does Google PhotoScan work
- Does harming yourself have moral implications?
- How do you focus on one thing
- What makes INTPs special for INFJs
- Be able to make consistent profits on the trading day