A 96 kVA load operates at 0.79 lagging power factor when connected to a 230 V, 60Hz AC source. The power factor is to be improved to 0.93 lagging. The power factor is to be corrected by a capacitor bank. However, the capacitors are loosely connected and take 34 kW when connected to a 230V, 60Hz AC source. What is the kVAR rating of the capacitor bank?

A 96 kVA load operates at 0.79 lagging power factor when connected to a 230 V, 60Hz AC source. The power factor is to be improved to 0.93 lagging. The power factor is to be corrected by a capacitor bank. However, the capacitors are loosely connected and take 34 kW when connected to a 230V, 60Hz AC source. What is the kVAR rating of the capacitor bank?

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter26: Three-phase Circuits

Section: Chapter Questions

Problem 3PA: You are an electrician working in an industrial plant. A 30-hp three-phase induction motor has a...

See similar textbooks

Similar questions

You are an electrician working in an industrial plant. A 30-hp three-phase induction motor has a current draw of 36 amperes at full load. The motor is connected to a 480-volt line. A three-phase wattmeter indicates a true power of 22 kW. Determine the power factor of the motor and the amount of capacitance needed to correct the power factor to 95. Also determine the minimum voltage rating of the capacitors. The capacitors are to be connected in wye.
Figure 2.26 shows three loads connected in parallel across a 1000-V(RMS),60Hz single-phase source. Load 1: Inductive load, 125kVA,0.28PF lagging. Load 2: Capacitive load, 10kW,40kvar. Load 3: Resistive load, 15kW. (a) Determine the total kW, kvar, kva, and supply power factor. (b) In order to improve the power factor to 0.8 lagging. a capacitor of negligible resistance is connected in parallel with the above loads. Find the kvar rating of that capacitor and the capacitance in F. Comment on the magnitude of the supply current after adding the capacitor.
A 100 kVA, 230V load operates at 0.80 lagging power factor. The power factor is to be improved to 0.80 leading by a capacitor bank. However, the capacitors are loosely connected and take 50 kW when connected to a 230V, 60Hz AC source.a. What is the total KVA consumption when the capacitor bank is connected? (162.5 kVA)b. What is the kVAR rating of the capacitor bank? (157.5 kVAR)c. Find the capacitance of the capacitor. (7.8976 mF)
A 240-V rms 60-Hz supply serves a load that is 10 kW (resistive), 15 kVAR (capacitive), and 22 kVAR (inductive). What is the current drawn from the supply in amperes? And what is the required capacitor rating in microfarads required to improve the power factor to 0.96 ?
A 150-kVA load has a power factor of 0.75 lagging. What is the kVA rating of connected capacitors to be installed in order to improve the over-all power factor of the to 0.91 lagging
A load of 300 kW with a power factor of 0.65 lagging has the power factor improved to 0.9 lagging by the addition of parallel capacitors. What kvar of capacitors does this require and what percent reduction in kVA results?
A load of 500 kVA operates on 1100 V, 50 Hz mains with power factor of 0.6 lagging. It is required to improve the power factor to 0.95 lagging by using the star connected capacitor bank. Assuming that the load KVA remains constant, suggest the rating of the capacitors.
The average load of a dairy plant at 11 kV, 50 Hz is 950 kW at 80 percent power factor but the maximum contract load of plant is 1200 kW. As per local electricity regulating authorities norms, consumer must keep the power factor of 95 percent to avoid any poor power factor penalty. Determine the following (i) Rating of capacitor bank (in kVAr) (ii) The capacitance of the capacitor bank (in micro Farad) (iii) Explain why the power factor becomes low and how the capacitor bank will assists to improve the power factor?
A plant has a load of 290 kilowatt with an average power factor of 70%. The owner requests you to correct the power factor to reduce its power consumption. How much capacitor kVAR is required to increase the power factor to 95%?
A 440V, 60 Hz generator, supplies 2 parallel connected loads A and B. Load A draws an apparent power of 100 KVA at 0.80 pf lagging and load B drawns an apparent power of 70 KVA at unity. Determine the KVAR supplied by the generator.
A 240 Volt 60cycle source is connected to a coil of wire that has a resistance of 75Ω and an inductance of 0.0477 Henry. Calculate the following. a) impedance b) current c) power d) power factor
A load of 500 kVA operates on 1100 V, 50 Hz mains with power factor of 0.6 lagging. It is required to improvethe factor to 0.95 lagging by using the delta connected capacitor bank. Assuming that the load KVA remainsconstant, suggest the rating of the capacitors. Also find the additional kW that can be supplied.