If the load is 10Kw and power factor has to improve from 0.5
to 0.8,how can we select the capacitor rating
accordingly.Illustrate by showing formula?
Answers were Sorted based on User's Feedback
Answer / guest
at 0.5pf Apparent power is 10/0.5=20VA
reactive power = 17.321kVAR.
At 0.8pf
APPARENT POWER =10/0.8=12.5VA
Reactive power=7.5kVAR
So we need to provide (17.321-7.5)=9.821kVAR reactive power
through capacitor to bring of up 0.8 from 0.5.
So we need a capacitor rated for approximately 10kVAR to
achieve the target.
ANS= CAPACITOR RATING 9.821kVAR (approximately 10 kVAR)
Is This Answer Correct ? | 10 Yes | 2 No |
Answer / prasad damodar bhoir
kvar= kw (tan phi 1- tan phi 2)
cos phi 1= 0.5, phi 1= cos inverse 0.5= 60
cos phi 2= 0.8, phi 2= cos inverse 0.8= 36.86
kvar= 10 (tan60 - tan 36.86)= 10 (1.73-0.74)
kvar= 9.9
Is This Answer Correct ? | 4 Yes | 0 No |
Answer / h salim
Load = 10 kW
cos phi 1 = 0.5
cos phi 2 = 0.8
Rating of capacitor Qc = kW(tan phi 1- tan phi 2 )
Is This Answer Correct ? | 3 Yes | 0 No |
Answer / prakash g.r.
Calculation of Required Kvar
Initial or Present Power Factor =Qi,
Required Power Factor = Qd
KVAr= KW(TANQi-TANQd)
Qi=COS-1PFi = Initial Power Factor Angle
Qd=COS-1PFd = Final Power Factor Angle
Is This Answer Correct ? | 3 Yes | 0 No |
Answer / ahatesham
at 0.5pf Apparent power is 10/0.5=20VA
reactive power = 17.321kVAR.
At 0.8pf
APPARENT POWER =10/0.8=12.5VA
Reactive power=7.5kVAR
So we need to provide (17.321-7.5)=9.821kVAR reactive power
through capacitor to bring of up 0.8 from 0.5.
So we need a capacitor rated for approximately 10kVAR to
achieve the target.
ANS= CAPACITOR RATING 9.821kVAR (approximately 10 kVAR)
Is This Answer Correct ? | 2 Yes | 0 No |
Kvar = KW * [ tan (cos^-1* Current PF) - tan (cos^-1* Required PF)]
Is This Answer Correct ? | 0 Yes | 0 No |
ganaretors A check B check and C check details
what is the formulae for calculating the cable size for a given voltage and current.
What is the name of powder which is used in inner side of a cable? and purpose?
how calculate gd2 of ht motors
4 Answers Hindustan Copper Limited, Kohler India,
What is the general power factor & min. power rating of TV,LCD type TV, CRt type TV, Scanner, printer?
whatis mean by voltage?
can alternators work at leading power factor?
In LRS how much water PH value maintain for good operation of motor?
how will be power factor while using the resistive load and Capacitive load?
can we use ELCB and RCBO in one db
why in india the voltage generate multiply by 11,,,like 220v,440v,11kv,33kv,66kv,220kv,
3 Answers NTPC, Servotech, Tata Power,
what is the transiant condition in alternator? and how it can be prevanted?