A question about a three-phase circuit

In summary, the conversation discusses the addition of currents with different angles and the resulting magnitude. The speakers also mention the similar phases of S1 and V1 and the potential error in adding I2 to I1. They also mention the differing power factors of the loads.
  • #1
Shloa4
15
0
Attached.
I'll be happy for some help here.
Thanks. :redface:
 

Attachments

  • Question.pdf
    169.7 KB · Views: 248
Physics news on Phys.org
  • #2
Shloa4 said:
For now, I am only focused on the magnitude.
So am I. :smile: You have added I₁ + I₂ without regard for their different angles.
 
  • #3
oops.. :) but still, S1 and V1 are similar in phase, aren't they? And since that's the case, S/V yields magnitude only (on the real axis). Same for both loads. And since the phase becomes 0 for both I1 and I2 (which is wrong obviously, but I cannot figure out where exactly I miss a thing here) so I can add I2 to I1.
That's probably my problem here. Any idea?
 
  • #4
What does "similar in phase" mean exactly http://img820.imageshack.us/img820/9631/icon5j.gif

The details are that one load has a leading pf and the other a lagging pf.
 
Last edited by a moderator:
  • #5


Sure, I would be happy to help with your question about a three-phase circuit. Can you provide more details about the specific problem or concept you are struggling with? This will help me provide a more specific and helpful response. Additionally, it may be helpful to include any relevant diagrams or equations to better understand the problem. Looking forward to assisting you.
 

1. What is a three-phase circuit?

A three-phase circuit is an electrical circuit that consists of three voltage sources, each with a phase difference of 120 degrees. It is commonly used in industrial and commercial settings for its ability to deliver high power with less voltage drop.

2. How does a three-phase circuit work?

In a three-phase circuit, the three voltage sources are connected in a delta or wye configuration. This creates a balanced load, with each phase carrying an equal amount of current. The phase difference between the voltage sources allows for a constant supply of power, resulting in a smoother and more efficient operation.

3. What are the advantages of a three-phase circuit?

A three-phase circuit has several advantages over a single-phase circuit. These include higher power output, more efficient power transmission, and the ability to operate larger motors and machines. It also allows for a more balanced load distribution, reducing the risk of overloading and power disruptions.

4. What are the common components of a three-phase circuit?

The common components of a three-phase circuit include three voltage sources (such as generators or transformers), three-phase power lines, and load devices (such as motors or machines). Other components may include circuit breakers, fuses, and switches for safety and control purposes.

5. How do you calculate power in a three-phase circuit?

To calculate power in a three-phase circuit, you can use the formula P = √3 x V x I x cosθ, where P is power, V is voltage, I is current, and cosθ is the power factor. This formula takes into account the three phases and the power factor, which measures the efficiency of the circuit. Alternatively, you can also use a three-phase power analyzer to directly measure the power in a circuit.

Similar threads

Engineering How to calculate rotor flux of the three phase squirrel cage induction motor?
    • Engineering and Comp Sci Homework Help
Replies
4
Views
2K
Design an opamp circuit with this transfer function on 3 voltage inputs
    • Engineering and Comp Sci Homework Help
Replies
3
Views
1K
What is the maximum line current for an electric vehicle charger?
    • Engineering and Comp Sci Homework Help
2
Replies
37
Views
3K
Engineering Three-phase circuit: Why Z_Ye is parallel with Z_Δ?
    • Engineering and Comp Sci Homework Help
Replies
4
Views
2K
Engineering Question about a circuit to be solved with Norton's theorem
    • Engineering and Comp Sci Homework Help
Replies
2
Views
821
Engineering Questions about the workings of a phase locked loop
    • Engineering and Comp Sci Homework Help
Replies
10
Views
1K
Phase Current Sensing Circuit: Q&A
    • Electrical Engineering
Replies
1
Views
795
Engineering Phase voltage and Line-Line voltage relation
    • Engineering and Comp Sci Homework Help
Replies
3
Views
913
Engineering Half-power cut-off frequency and frequency and phase response.
    • Engineering and Comp Sci Homework Help
Replies
15
Views
971
Fundamental confusion about THREE-PHASE electric power setup
    • Engineering and Comp Sci Homework Help
Replies
3
Views
2K

Hot Threads

Recent Insights

Back
Top