can we use 400w coke instead of 250w choke in 250w fittings
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Answer / k.prakashchandra
No.choke decides the power output,being the current
regulator
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Answer / k.prakashchandra
N0. 400w choke is of lower inductance,hence it will make 250
W lamp draw more current than the rated.
| Is This Answer Correct ? | 0 Yes | 3 No |
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?
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