Answer / thanigai1984

Normally we maintained Generators by A check B check C check
A check - daily normal checking
B check - half yearly checking-
C check- Total checking and replacing

what type of earthing is done on hilly rocks.

4 Answers  

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HOW TO CALLICULATE RESITENCE,REACTANCE AND IMPEDENCE VOLTGE OF TRANSFORMER 13.33 KVA 144/240 VOLTS 93/56 A WITH FORMULA

0 Answers   ISRO,

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What is Bolted fault?

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How to select the proper VSD to operate high inertial load

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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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what is bus duct and what is differance between bus duct and bus bar

6 Answers  

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If I have Energy Meter Ratio as 100:5 & Also I have CT Ratio as 50:5 then what will be my multiplying Factor(M.F.)

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How to design the earth grid for lightning protection in an industry

2 Answers  

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1.Z transform always lies around ? a) origin b) pole c) zero d) z=1. Multiples Mcqs which is bother me can’t find answers on internet. Some help required with little explanation . Note: this is not homework or related to any test. Thanks

0 Answers   CCP,

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WHAT IS THE difference betwwen LT CABLE AND CONTROL CABLE

5 Answers  

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Differentiate between ideal and non ideal current sources?

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What are the differents between Breaker & Contactor?

8 Answers  

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