What is "Apparent Power" (VA)?

  • Thread starter iScience
  • Start date
  • #1
iScience
466
5
In school I learned about impedance:
where..

$$Z^2 = R^2 + X_{net}^2$$

but this was the only triangle I recall learning about.
The picture below I definitely do not recall.

1615653994311.png

from this Link

The only quantity I am familiar with is the x-axis (Power).

If someone could explain apparent power and its importance with finding an appropriate UPS device, please throw me a bone. ty
 

Answers and Replies

  • #3
anorlunda
Staff Emeritus
Insights Author
11,184
8,577
Read that article that @gleem posted for you.

For a dead simple example, a 100 VA UPS could power a 100 w resistance heater, but not a 100 w motor. That's why it is important.

In a resistance, the imaginary power is zero, so VA and power are the same thing. That's what you are used to.

The motor needs both real power (watts) and imaginary power, so the VA is the complex sum as shown in the diagram you posted in #1.
 
  • Informative
  • Like
Likes sophiecentaur and berkeman

Suggested for: What is "Apparent Power" (VA)?

  • Last Post
Replies
2
Views
260
  • Last Post
Replies
20
Views
467
Replies
9
Views
365
  • Last Post
Replies
19
Views
893
Replies
4
Views
466
  • Last Post
2
Replies
41
Views
514
Replies
17
Views
590
  • Last Post
Replies
7
Views
329
  • Last Post
Replies
10
Views
515
  • Last Post
Replies
16
Views
1K
Top