Answer / sital

The single-phase feed makes it possible to use a single overhead line. More overhead lines increase the costs, and restrict the maximum speed of train.
Three phase inverters and related variable frequency drives, may, under certain circumstances, produce large amounts of harmonic distortion in their output, and the efficiency of the inverter-motor combination can be poor.

What is potientiometer.What is the use of it.

1 Answers  

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Why we use two wattmeter during block rotor test and no load test of 3phase induction motor? And how can we understand the neat power requirement of from this test?

2 Answers  

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when 40 watts and 60 watts bulb is connected in series, which bulb glows brightly ?

5 Answers  

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WHY HUMMING SOUND OCCURED IN HT TRANSMMISSION LINES ?

26 Answers   GE,

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how to calculate 3 phase clearance in Tower line , 33& 11 KV Line and LT Line.

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 will happen when power factor is leading in distribution of power?

10 Answers   AMET, JTO, Power Grid,

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What does “battery of 180 AMP HOUR” mean to you?

2 Answers  

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what is the slip of synchronous motor

1 Answers  

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what is the use of Antipumping in HT breakers.

9 Answers  

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How to calculate the Meter constant for the given Meter (by using any formula)

4 Answers   HCL, Viva,

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WHAT WILL HAPPEN WHEN THE MOTOR FREQUENCY INCREASED OVER THE RATED MOTOR RPM THROUGH DRIVE?

3 Answers  

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