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How we can calculate what type of supply we need for an example sometimes we take 11 KV and sometime 33KV from EB ?
4 6745What is a formula to decide the size of the cable of the star delta motor ( From Contactor to the motor 2 runs )
4 63701.After synchronising the alternator to the grid,how we r delivering power to the grid?if the i/p increases does the speed hence frequency increases? 2.y the power factor is changing when exitation changes?what is the relation with p.f and flux?
BSNL,
4 10700what is the voltage of insulation megger that should be used for measuring the resitance of 66kv equipments.
DEWA,
3 9342Dear all, I want to use Induction motor to open and close a 1 ton door. How much power do I need. Thanks
1890what is automatic voltage regulator?we can control the vlotage by using fuzzy controller in matlab?why we go for fuzzy?
DEWA,
1963Post New Electrical Engineering Questions
how to conduct dc resistance test for rotor of an alternator and how to measure the rotor dc resistance value theoritically?
thyristor controlled APFC panel design parameter?
what are the difference between PLC and embedded
What is the difference between UPS & inverter ? which UPS is better and whos got the edge ? what is the difference between & inverter ? which UPS is better and whos got the edge 12 V , 24 V , 36 V etc what are the advantages of 12 V, 24 V , 36 V etc and what are the disadvantages of 12 V, 24 V, 36 V etc thanks
What are the various kind of cables used for transmission?
33kv Rated output avilable in market (any where in india)
Why 30kw 40 hp 4 pole 3ph induction motor over heated?any steps on reduction in heat?
what is the use of surge suppresser in 33 KV incoming panel. where it must be installed,inseries with incoming cable surge suppresser must be at incoming of the breaker are outgoing of the breaker
How to calculate no of Lighning arrestors are required for protecting 50mX 50m*20m cubical building and locations of LA?
how does directional relay work incase of ac ?
hi guys please tell me the procedure for mesuring the coil resistance of 3ph induction motor?
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?
can we conduct the swineburne's test on a dc series motor? why?
The power supplied to a 33microF capacitor from a 120V, 60Hz source will be
How we can defined theecopper cable size if we know the aluminium cable size?
