how starting current in motor is reduced in case of motor in star connection.

4 Answers   Adhunik,

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what is the use of back emf?

1 Answers  

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how to check 3phase motor winding with help of multimeter?

2 Answers  

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What is plc.

2 Answers  

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please send me previous year questions of jspl through which i could prepare myself for the test.

0 Answers  

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What are the functions of temperature scanner in power transformer?

0 Answers   HCL,

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Usage of flywheel diode in relays

0 Answers   Jindal, Voith,

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how to calculate efficiency of voltage and current controlled welding transformer?

1 Answers  

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What are the advantages of vscf wind electrical system?

0 Answers  

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How many types of timer ?which timer are used star delta feeder

1 Answers   BMM Ispat,

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What is the difference b/w fanuc alpha series 16i and 18i controller. what is stand for i

0 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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