What are the necessary conditions for production of
rotating magnetic field.
Answer Posted / skaz
In windings, there should be space displacement and time displacement. Then only RMF produced.
| Is This Answer Correct ? | 0 Yes | 0 No |
Post New Answer View All Answers
how to revers the direction of single phase motor
what is quality factor in series resonance circuit and calculate the factor of voltage magnification? how it happens?
How generator NPS(NEGATIVE PHASE SEQUENCE TEST)TEST WAS DONE? PROCEDURE WITH DETAILS?
define digital electronic
Dg pf .71 i am improve pf 0.80 what capacitor connected in dg how?
What is the function of electron gun used in crt?
what is the disadvantages of common earthing for AC and DC equipment? (i am talking about inverter control room and inverter duty transformer earthing is common...?)
what is working process of star delta controlling circuit ?
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?
what are the different kind of cables used for transmissions?
ASTM D 3455 - Standard Test Methods for Compatibility of Construction Material with Electrical Insulating Oil of Petroleum Origin has been used for Testing Transformer Oils with a product placed in it. Aged Control Oil has a Power Factor of 0.032% at 100°C. Aged Oil with a Test component has a Power Factor of 0.093% at 100°. Is this increase acceptable? If not why? How much increase is acceptable?
why connecting surge unit in contactor coil
solar inverters was not connected to the nuteral link .this nutwral possible to any other systems
Define phase lag and phase lead?
What are electric motors?