why use only sf6 circuit breker in 400 kv sub station

5 Answers   BARC,

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What do you mean by pf of a generator? Power factor purely depends on the load (wether inductive, reactive or unity) then what does the pf mentioned on the generator nameplate means?

3 Answers  

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how to reduce the magnetizing current in distribution transformers

1 Answers  

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What is pi controller?

0 Answers  

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how to calculate the capacitor to maintain power factor?

0 Answers   Bosch,

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What is different between Regulator & Stabilizer?

5 Answers  

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how cables go in and come out for distribution from the feeder pillar box?

0 Answers   CESC,

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Design and explain a circuit to produce an unregulated full wave D.C supply.

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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What is the difference between MPCB and OLR?

11 Answers   ABB, Raj Agencies,

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what are the values to be accepted on 3 core 185sq mm for 11000volts on insulation resistance between conductors and between conductors and earthed?

3 Answers  

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IN 3 phase induction motor where we give i/p supply & how its working ?

2 Answers  

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