Theory & Design第 85 / 110 题
An 80-kW load at 0.80 power factor is to be corrected to 0.95. How many kVAR of capacitance are required (tan 36.87 = 0.75, tan 18.19 = 0.329)?
a.33.7 kVAR
b.60 kVAR
c.48 kVAR
d.20 kVAR
解析
Qc = kW x (tan(theta1) - tan(theta2)) = 80 x (0.750 - 0.329) = 80 x 0.421 = 33.7 kVAR.
免费刷完整 110 道题库 — 无需注册。
同考点相关题目
- In a balanced delta three-phase system, the line current equals:
- In a 208Y/120-V wye system, what is the phase (line-to-neutral) voltage?
- In a 480Y/277-V system, what is the line-to-neutral voltage?
- In a three-phase, four-wire wye system serving nonlinear loads, which harmonic order adds arithmetically in the neutral?
- On a feeder with significant harmonic (nonlinear) load, the neutral conductor is treated as:
- A three-phase panel has phase loads of A = 40 A, B = 30 A, C = 20 A. What is the ideal balanced current per phase?