Answer / k.prakashchandra

A short branch of the main line / tapped line

what is meant by surge? what we called for high currents?

0 Answers  

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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?

0 Answers   Siemens,

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explain single phase series motor

0 Answers  

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how to connect the three phase capacitor in three phase star/delta connection motor?

1 Answers  

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how to estimate wiring ins roughing ins. and boxes

0 Answers  

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What is third harmonic?what is the effect of it?

0 Answers   GMR,

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WHY IL=IPH IN STAR AND WHY IPH=IL/1.732 IN DELTA? WHAT IS REASON BEHIND IT?

0 Answers   Siemens,

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what is mind in cable

0 Answers   BARC,

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how to match 0 -10V with 4 - 20mA

3 Answers  

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what are the differences between MCB and MCCB ?

19 Answers   Bhel, DLF, Omax,

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purpose of breaker contact multiplication relay?

5 Answers   ABB,

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How to know th details about an electrical Drawing ? Please mention the easy method.

0 Answers   Siemens,

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