Hi Friend I am used multimeter to measure the voltage between R Phase(SS1) to R Phase(SS2). In SS1 is connected with UPS loads. But I am getting voltage between these 2 R Phases. Please give some idea friend

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what is the meaning of servo motor. In trains, what type of the motors we are using at the bottom of each compartment

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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 are all the points to be checked while decanting diesel from tanker lorry to HSD YARD

1 Answers   Cisco,

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A 50Hz,4-pole,3-phase,star-connected synchronous motor has a synchronous reactance of 12ohmsper phase and negligible armature resistances.the excitation is such as to give an open-circuit voltage of 13.2kilovolt.the motor is connected to 115kilovolt, 50hertz supplying. what maximum load can be the motor torque,line current and power factor?

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How seriving & testing of the HT & LT breakers are done. What are the standard Ir values on which we can come to know the test is passed or failed?

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what is difrent between earthing and ground

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Define filter?

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Dear friends, i would like to know that what is the exact function of 'exciter winding' & 'aux winding' in Alternator?

0 Answers   NTPC,

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how would you determin the horsepower of a motor without a nameplate

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How to calculate voltage drop loss in HT 11000 Volts XLPE Aluminium conductor cable. Any specific formula or Thumb rule

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why use generator Earthing/Graunding.

4 Answers  

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