single phase for 230 then why three phase are 440 volt
Answer Posted / viswanath
Single Phase voltage = Phase voltage / sqroot of 3
| Is This Answer Correct ? | 24 Yes | 13 No |
Post New Answer View All Answers
How to know any size of cable if there are not written on cable? Answer must be theurical not by experience.
What is George phenomena to start the synchronus machine?
what is calculation mathod/formaulla for deciding Size of busbar (Copper/ aluminum)for L.T. panel on Various Fault level like 50kA,25kA,10kA
Give details on how you intend to handle a challenging position you are posted to manage unexpectedly as a company staff?
What are linear and non-linear systems?
If one lamp connects between two phases it will glow or not?
orifice sizing how done, checking & selection
AL=0B9H,bl=75H, ADD AL,BL AL=____________? CF________? OF___________?
what is meant by power and distribution transformer ?
Define delay time.
what is the circutor?why we use it ?
how desiel generate sart fail of eb?
how is calculated the quantity of weight in hot test xlpe?
What is the criteria for selecting the voltage classes of an AC Induction Motor.The KW rating above/below which ht/lt selection is made may be provided in details.
1- XC and the RC time constant are both measures of the reaction of C to a change in ____? 2-The power factor is a numerical ratio with a value between 0 and 1 equal to the ______________ of the phase angle. 3-When V and I are out of phase because of reactance, the product of V times I is called ______________ power 4-For _____________ inductors, the branch currents can be added algebraically. 5- The ______________ power in watts can be calculated as I^2R 6-Calculate XL with L = 30mH and f = 1kHz ( I have Xl=2piFL 2*3.141592653*1kHz*30mH =188 ohms Please check) 7-A parallel RL circuit has the values, R = 5kohms, XL = 5kohms. A voltage source of Vt = 10Vrms is connected in parallel to R and L. Determine the total current, It delivered by the voltage source Vt. 8-A series RC circuit has R = 1Mohm and C = 1microF. How long would it take for the capacitor to fully discharge if it is initially fully charged? 9-A circuit has real power = 300W and an apparent power of 500VA. Determine the power factor and phase angle. 10-The time constant for an LR series circuit is T = 0.1s and R = 10ohms. Calculate the inductance L.