How do you calculate the total power in a three-phase AC system?
Practice Questions
1 question
Q1
How do you calculate the total power in a three-phase AC system?
P = √3 * V * I
P = V * I
P = 3 * V * I
P = V^2 / R
The total power in a balanced three-phase AC system can be calculated using the formula P = √3 * V * I, where V is the line voltage and I is the line current.
Questions & Step-by-step Solutions
1 item
Q
Q: How do you calculate the total power in a three-phase AC system?
Solution: The total power in a balanced three-phase AC system can be calculated using the formula P = √3 * V * I, where V is the line voltage and I is the line current.
Steps: 7
Step 1: Understand that a three-phase AC system has three wires carrying alternating current.
Step 2: Know that in a balanced system, the current and voltage are equal in each phase.
Step 3: Identify the line voltage (V), which is the voltage measured between any two of the three wires.
Step 4: Identify the line current (I), which is the current flowing through each of the three wires.
Step 5: Use the formula P = √3 * V * I to calculate the total power (P).
Step 6: Multiply the line voltage (V) by the line current (I).
Step 7: Multiply the result from Step 6 by √3 (approximately 1.732) to get the total power.
