Interested to Buy Any Domain ? << Click Here >> for more details...
How you calculating the current for a 2.5 Sqmm cable.
A 30 Hp 3 phase AC motor of power what size of cable is
used for this motor.
- 7 Answers
- 24162 Views
- Siemens, I also Faced
- E-Mail Answers
Answer Posted / balakrishnan.t
For calculating the current rating of a 30 Hp 3 phase motor can be written as
power = sq root(3)* VL*IL*cos (phi)--------(1)
where 'VL' is line voltage, 'IL' - line current and cos phi- power factor
OR 3 EP*IP*cos(phi)
as the voltage fed is from three phase system.
Power input of 30 Hp motor = 30*746/(efiiciency*cos phi) watts
from the formula (1) and taking efficiency as 0.9,
Line current 'IL' = 30*746/(1.732*415*0.9*0.83)
= 41.68 Amps
| Is This Answer Correct ? | 6 Yes | 3 No |
Post New Answer View All Answers
If we have to find the inductance of a dc shunt motor then by giving dc supply or ac supply and what is the reason for it. (this example is from "to determine the transfer function of a dc shunt motor ")
What is the ratio of Booster transformer?
What is the difference between UPS & inverter ? which UPS is better and whos got the edge ? what is the difference between & inverter ? which UPS is better and whos got the edge 12 V , 24 V , 36 V etc what are the advantages of 12 V, 24 V , 36 V etc and what are the disadvantages of 12 V, 24 V, 36 V etc thanks
if the number of poles generated in stator and rotor side of an induction motor are different then what will happen and why?
what is star delta starter? how it works? give its control and power diagram.
how to carry out Magnetizing Current Test on Distribution transformer and what purpose we are doing this test. why transformer rating in always in KVA ? what ispositive, negative, zero sequence impedence? How ElCB tripping if Neutral touch with ground Why AC & DC capacitor are use in UPS ? why motor rating in KW? how to syncronize two dg sets
What is the different between digital phase converter and ordinary phase converter?
can some one clearly explain why -48 volt DC use in telecom site????
how define the torque in ac drive. from electrical side in the drive friquency ,voltage and current three factor is there.
what is allowable ac mixing in dc
why connecting surge unit in contactor coil
What is difference between YNyn0 and YNyn ??
What are the characteristics of negative feedback?
Batteries. What is the difference between Lead and Nickel batteries ?
What is the formula to calculate the size of Aluminium and copper cable?
