how can we convert 48V dc into 12 V dc? Any standard device for it??2 3563
hwat type of motor is used in thermal gas turbine hydro nuclear power plants and why
In a power system we know that if the generated power is less than the load then the frequency of the system is decreases.So does this mean that total required load is delivered at alower frequency?1 1861
what is The difference between national electrical code and I.S.Code (electrical) and what is the value of NEC in electrical engineering field1037
An 11kv system consisting of an underground cable to a sub station about 300 meters away was shut down for about 10 hrs. On energising, it tripped off on earth fault about 10---20 mins later 6 times but since than it is not tripping.its already 3 weeks now. The SPAJ was found to be fine. what could be the cause.No test had been done to determine the cause of the trippings till now because of demand.2 3012
How can i check a relay good or not?2 3064
DEAR SIR, HOW TO CALCULATE WELDING TRANSFORMER CAPACITY IN KW OR KVA (POWER). TWO WELDING TRANSFORMER USED WHAT TYPE OF DG SET CAPACITY LIKE ( 45 KVA OR 62.5 KVA), PLEASE TELL THE WELDING TRANSFORMER RATEINGS. I AM REFINARY (TANKS WELDING) THANKING YOU2 8132
Why transformer, generator, ups rating kva?2 4420
in alternator why on load terminal voltage is less than no load teprminal voltage1 2188
Why we use parllel operation of alternator1 2231
need of capacitor used in plant3 3169
In a generator (Synchronous) does the rotor speed (frequency) corresponds to the speed of the water (in hydro). does the torque on the turbine relate to the flow of water?2 2663
When in a large power system if the demand of power is larger than the generated power the frequency of the power system drops.(assume the rated frequency is 50Hz and now it is 49Hz) So does this mean the demand is totally supplied with a lower value of generated power in a lower frequency?1 2125
what is slip what is the use of slip?1 1152
How can decide the MVA rating of power transformer for substation like 220/132, 132/66, 66/33kv etc or even higher kv rating of substation???? Send me the strictly technical answer that shows your strong technical aptitude.6 25116
When the relative speed between the magnetic fields of stator and rotor does is zero under steady state operation?
If ROC does not lies inside unit circle,then ? a) Fourier transform converges b) Z transform converges c) Hatly transform converges d) Colpit Transform converges.
Why let through energy not considered for ACB breaker while cable sizing?
what are the basic insulation levels & what its Unit
How to calculate the volumetric capacity of a oxygen & Nitrogen gas Cylinder if pressure is 145 kg/cm2 & water capacity of cylinder is 67 liters.
cc of scorpio?
what is mathed of check the D.C MOTOR 181 KW (ARMATURE AND FIELD) WHAT IS THE MATHED OF CHECK THE THYRISTOR MODULE (HIGH CURRENT)
why do you add the load short circuit impedance when considering short circuit amperage. It seems that you should only consider supply. If you need to consider loads and you don't know what loads are to be added , what would be a good sub-transient reactance rating for the loads?
What is the previous name of Cox's Bazar
1.why we are using blocks in withoutgaplightning arrester 2.why we ar using bushing in withoutgap lightning arrestor
what is the pulse and audio frequency transformer? what is different between induction regulators and tap changing transformer?
Why delta star trformers are used for lighting loads?
Define the overload capacity of the motor?
In a simple spur gear train, gears with 24, 48, 32, 72 and 96 teeth are in sequence. The gear with 24 teeth runs at 900 rpm. The speed in rpm of gear with 72 teeth is
description about dry type transformers