Answer / priyanka

alternator is used because once it picks up its speed it
rotates with a constant speed it is having wide application
in transmisson of generated energy,it can handle huge
amount of power.

WHAT IS MEANT BY DERATING OF THYRISTOR?

0 Answers   TATA, Trane,

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we can conformed the vector group of the transformer. How?

0 Answers  

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what is negative phase sequence

1 Answers  

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what type of motor is used in fan

6 Answers  

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why is the conservator tank painted white on the transformer

0 Answers   Bangladesh Bank,

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regarding safety what would u consider the most important rules to observe when inspecting electrical equipment?

0 Answers   Reliance, Southco Utility,

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Why indicated only R.Y.B to phase.

6 Answers   Bhel,

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Does the electricity supply authority send its customers power (kW) or voltape (V)? Asked by Ivan Muliro

2 Answers  

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LT cable fault chaecking equipment and to find out the distance at what distence it failure . Name and where it is available?

0 Answers   Himatsingka Seide Ltd,

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What is the difference between MCB & MCCB, Where it can be used,

22 Answers   ACB Group, Badve, Bajaj Electricals, Hensel, Siemens, SR,

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How much the fault level of 11 k.v.,22 k.v., 33 k.v. (in Maharashtra- M.S.E.D.C.L) for calculation of short circuit current & selection of h.t.cable.

1 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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