What is power factor? Whether it should be high or low ?
why?
Answer Posted / manu srivastava
power factor is cosine of the angle between V and i i.e.,
cos (phi), where phi is the angle between V an I.
power factor dends upon the circuit, weather it is
inductive,capacitive or resitive. if it is inductive p.f is
lagging i.e., i lags v.if its is capacitive, p.f. is
leading,i.e., i leads v,for resitive, v and i are in phase
with each other.
| Is This Answer Correct ? | 3 Yes | 3 No |
Post New Answer View All Answers
What fomula is used to calculate: 1. rated frequency withstand voltage, and 2. rated lightning impulse withstand voltage.
What happens to voltage when current is zero?
What are the factors influence the choice of an electrc drive?
What are capacitive,resistive,inductive surge absorbation? What is ferranti surge absorber? What is lagrangian cost? What is Px operator?
I have an existing old MCCB. ABB Model SACE, the rating are: Ue = 660 volts, Iu =1250 Amps, 3 poles, Ith (max) =800 amps at 45 deg C. I need a circuit breaker for my 3 phase motors, 380 volts 60 hz. the supplier required the minimum ampacity of the breaker to be 911 amps. can i use this breaker with rating of Iu =1250 amps but Ith = 800amps maximum?
A commercial Building is designed with 14th floor levels with indoor substation of three phase transformer with rated capacity of 1000 Kva.The transformer delivered 65% of its rated capacity at 0.67 power factor lagging.Because of low power factor, the power customer was penalized and certain cost was charged accordingly based on every point percentage lower than 85%.This situation may repeatedly happen on the succeding energy bills of power customer.The power customer is desired to improve its historical power factor of 0.67 lagging and no further penalty be impose by the local power company on the next bill. Q: Identify the appropriate solution you want to offer to Client?.Justify SCIENTIFICALLY and MATHEMATICALLY the principles behind the solution.
What is the simplest formula to calculate the rotor diameter of a synchronous generator?
what percent do you derate your copper wire when you change from copper buss to copper wire
ho can we calculate the conductor insulation value according to their ratings like voltage,current etc.how insulation value related with voltage,current and power of amachine
WHAT IS DEAD END IN PROTECTION?
WHAT IS LOAD CELL
at work we have a 3 phase motor but on testing one phase isnt getting a reading. it runs 24 hours a day all week. stops and starts well no noise or heating. the phase isnt down to earth.is it just a bad meter reading or not? phases one and three came up with a resistance reading of 0.4 but phase 2 couldnt get anything shows up as open circuit.
how to find ratio of CT & PT in 66/11kv 12 mva supply system ? explain with calculation.
how technical is calculated in 11kv line and lt line
how we can explain arc heatng?