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
- 24505 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
What is the procedure/activities to be taken to inject the current more than 2000A by using 2000A Loading Transformer?
Yazaki india pvt ltd interview questions qurey related
sir i ve applied for hindustan petroleum and power grid india ltd..and the exams on feb 22.can you pls send model papers and tell how to prepare for those.i need to get into any of these for sure.....
What are the different losses In a de mac1une'! t.xplam
Calculate torque developed by the 3-phase, 5 H.P., 4 pole induction motor runs at 1500 rpm A 23 N-m B 21 N-m C 10 N-m D 0 N-m
what happen if drive input fail momentry at 48.5 HZ frequency?
whats the differece between Exd and Exe
how to put cable sizing and cable glands size for respective cable & Cable Lug size in a DB sectors???
what is earth fault relay 64T, why it is used in main Incomer and neutral CT of Transformer.
Can any body tell me the different types of LT cables & their application.
what is the advantages og idmt relay over magnetic relay??
100 MVA 3-phase alternator with earthed neutral has a reactance of 5 ohms per phase. what will be the fault MVA of generator.
11kV capacitor bank of rating 2.4KVAR, is charged with protective relays of only over current & Earth fault &.......without Over Voltage, Under Voltage & Neutral Displacement Relay. Is it advisable??
what is ground fault in ACB?
what is the Connected Load (kW) or Contract Demand (kVA)of mahindra nasik plant??
