What is the formula to find out the kvar required to
improve the powerfactor from .85 to .99 at 1500kw, 415v.
Answers were Sorted based on User's Feedback
The KVAR required is:
KVAR=KW(tan@1-tan@2) (where @1=cos-1(p.f1)& @2=cos-1(p.f2)
Therefore,
KVAR=KW {tan[cos-1(p.f1)]-tan[cos-1(p.f2)]}
=KW {tan[cos-1(0.85)]-tan[cos-1(0.99)]}
=KW {tan[31.79]-tan[8.11]}
=KW {0.48}
=1500 {0.48}
=720
Therefore 720 KVAR is required to improve powerfactor from
0.85 to 0.99 for 1500KW load.
NOTE:-
Excuse me if the answer is wrong.
Is This Answer Correct ? | 14 Yes | 2 No |
Answer / alimohmad khatri
KVAR=KVA*SIN(PHI)
KW=KVA*COS(PHI)
HENCE....KVAR/KW=TAN(PHI)
KVAR=KW*TAN(PHI)
NOW, FOR P.F.(1)=COS(PHI(1))=.85 THEN TAN(PHI(1))=.6197
FOR P.F.(2)=COS(PHI(2))=.99 THEN TAN(PHI(2))=.1425
KW=1500 KW IS COMMON FOR BOTH CASE 1 & 2
REQUIRED....
KVAR=KW*[TAN{PHI(1)}-TAN{PHI(2)}]
HENCE KVAR=1500*(0.6197-0.1425)=715.8
YOU NEED TO ARRANGE CAPACITOR BANK OF 715.8 KVAR.
Is This Answer Correct ? | 6 Yes | 0 No |
Answer / waqi
first calculate the kva at .99 and 1500kw
(cosp=kw/kva),than put the value of kva in this formula kva=
(kw)2+(kvar)2)^1/2 to caculate kvar at .99 pwr factor
Is This Answer Correct ? | 0 Yes | 0 No |
Answer / habeebm
Dear Waqi
I am not understand your answer for the above mentioned question. Will you please solve and give us the answer for required KVAR to improve power factor from 0.85 to 0.99 for 1500KW load.
Is This Answer Correct ? | 0 Yes | 1 No |
What are the point of a single core cable to be earthed?
what is the setting of locked rotor in HT motor ? (answer expecting in percentage)
What is the Diference between DYN 11 and DYN 5 .How to change the Vector group from DYN 11 to DYN 5.
different between circuit breaker & switchgear & relays
What is PEC??Applications........
i want to know d working mechanism of tafe tractors next i like to know d engine type of apache bighs can anyone help me
my company total load is 1000kw, 415volt, all load are inductive load. incoming powerfactor is .8. we want to have0.95 pf connecting capacitors. so now how much rating of capacitors we have to connect? show how?
What is diversity factor and how to calculate it
2 Answers Al Faraa, Amul, Pentagon, Sobha Developers,
when we start the tube light, then it takes initially 1100 volt, after glow it takes 120 volt?(when we give 220 volt a.c.)
explain the meaning of harmonic resonance
what is preventive maintenance? and what is predictive maintenance? and what diffrence both?
Why Neutral Isolation is required?