Why? We r used 50sq. mm. And above size cable in 3.5 core and below size are used in 4core
Answers were Sorted based on User's Feedback
Answer / k.prakashchandra
Above 50 sq mm cables are usually used 3 phase loads and
fair balancing of loads is expected.As the neutral current
is unlikely to exceed 50 % of full load ,half the core size
is sufficient to save money
Is This Answer Correct ? | 2 Yes | 0 No |
Answer / diwakar
We even have three phase loads used in 25 and 35 sq.mm.. cant say that as the reason alone.
Is This Answer Correct ? | 0 Yes | 0 No |
Can the same motor be operated in both direction ?
We have drive feeding an output contactor for a 5000 hp motor @ 5kV application. The motor FLA is 629amps x 1.25% service factor = 786.25 amps The cable that we current have in place between the drive and the output contactor is 350kcmil- MV-105 (parallel cables). Per the NEC table 310.60 (C) (69). This show the cable ampacity is at 615 amps per cable for a rating of 1230 amps. We have derated the cable for the cable tray and the multiple cables application and our calculations show that after the correction factor factor we are at 922amps. 1230 amps x .75% correction factor factor = 922.5 amps. The customer is driving us to then use another safety factor of .25% off of the already derated cable. Can you please provide a longhand calculation for your solution on this application?
Hi, My question is our total motor load is 55 kw.so what cable size required for main supply. Please reply
in flemings lefthand rule thumb indicate for....
what is the function of bearing in dc mchine" and where it is placed
What is the voltage gain or transfer function of amplifier?
Dsitrubution transformer minimum IR value
What is Instantaneous Earth fault relay,how will work
Compare OH Transmission & UG Transmission?
what is the relation between knowing of the distance between power transformer and the capacitor feeder in case of parallel operation
In a three-phase full converter, output voltage pulsates at frequency of a. f b. 2f c. 3f d. 6f
I have 3KVA Libert GTX2 UPS. I need to calculate the back up time with some load. How to calculate the Back time. I need the expert guide