Answer / a.p.nanjappa

it is the contractor rating .
Refer to IEC standards as mention in the catalogs.
It is the recommendation of electrical standard to select
the device rating,type.

What it is the diff btw Package & PEC AC's????

2 Answers   Emerson,

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if power factor comes in leading & showing -0.95. Is there any effect on electrical system? if yes, then please tell me what would be the effects. & how long we keep power factor in leading. Keeping power factor in leading shows more KW & less KVA is it correct or not.

2 Answers   Jakson,

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What is power factor ?What are the benefits of improved power factor & how. Please explain with examples.?

5 Answers   ABB,

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working principle of oil startar

0 Answers  

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What do you mean by power transformer?

0 Answers  

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what is the use of reactive power

3 Answers  

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what is the difference between capacitive and resistive voltage divider?

0 Answers  

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what factors to needed while selecting a MCB and MCCB

3 Answers  

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What is auto transformer?

7 Answers   L&T,

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if voltage is not builed up in small generator what will be the reason?

7 Answers   century,

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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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why tan delta test conducted in electrical equipmenr

4 Answers  

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