Current Rating of an AC Generator

AI Thread Summary
The current rating of an AC generator is determined using the formula kW = V * I * PF * sqrt(3), where PF represents the power factor. In three-phase systems, the inclusion of sqrt(3) accounts for the relationship between line and phase voltages. For a generator rated at 875 kVA with a power factor of 0.8, the corresponding kW output is indeed 700 kW. To find the current rating, the equation can be rearranged to solve for I using the known voltage and power factor. Understanding these formulas is crucial for accurately calculating the performance of AC generators.
Sent
Messages
7
Reaction score
0
Hello,

I'm a bit confused on the term current rating in an ac generator. Is it the one in that I can get in the formula:
kW= V*I*PF*sqrt(3) ? or the one in kW= V*I*sqrt(3)? The problem is the data that I have is V, PF, kVA only. I can compute the kW using those data but I'm abit confused on those formulas.

Also, I've read in some books that there are times that if the generator is 3 phase, the formula has a sqrt(3) why is that so?

Thanks!
 
Engineering news on Phys.org
It's the first equation. Naturally that means the power depends on the power factor of the load.
 
russ_watters said:
It's the first equation. Naturally that means the power depends on the power factor of the load.

So for example I have a 875kVA and a .8 power factor, my kW will then be 700 kW right?

According to the first equation, If I have a volts of 2400, it will be 700 kW = 2400 * I * .8 *sqrt(3)
That way I can have the current rating?
 
Thread 'Weird near-field phenomenon I get in my EM simulation'

Thread 'Weird near-field phenomenon I get in my EM simulation'

I recently made a basic simulation of wire antennas and I am not sure if the near field in my simulation is modeled correctly. One of the things that worry me is the fact that sometimes I see in my simulation "movements" in the near field that seems to be faster than the speed of wave propagation I defined (the speed of light in the simulation). Specifically I see "nodes" of low amplitude in the E field that are quickly "emitted" from the antenna and then slow down as they approach the far...
View full post »

Thread 'EMF (Electromagnetic Field) & EHS (Electromagnetic Hyper Sensitivity)'

Hello dear reader, a brief introduction: Some 4 years ago someone started developing health related issues, apparently due to exposure to RF & ELF related frequencies and/or fields (Magnetic). This is currently becoming known as EHS. (Electromagnetic hypersensitivity is a claimed sensitivity to electromagnetic fields, to which adverse symptoms are attributed.) She experiences a deep burning sensation throughout her entire body, leaving her in pain and exhausted after a pulse has occurred...
View full post »

Similar threads

Reducing AC inrush current in this setup
Replies
15
Views
2K
Checking this Equation for Power Factor
Replies
8
Views
1K
Gravity Based Electricity Generator
2
Replies
74
Views
7K
Magnets with Halbach array in an AC generator
Replies
6
Views
2K
Self excited induction generators and grid connected solar inverters?
Replies
9
Views
2K
AC generator, current and ground
Replies
26
Views
2K
AC Electricity Generation and Transmission over a Single Wire?
Replies
21
Views
5K
Understanding Electric Shock in Floating-Neutral and Floating-Ground Scenarios
Replies
19
Views
2K
AC Induction motor startup current
Replies
6
Views
4K
System design for charging battery from turbine alternator
Replies
8
Views
2K

Hot Threads

Recent Insights

Back
Top