why the desirable efficiency for a motor is 60%, but in case of transformer, it is above 90%?
1 3417how to calculate Amp, 2 different Amp of batteries? Example: No. of Batteries = 2 Battery voltage = 12V 1st Battery rating = 17AH 2nd battery rating = 30AH between parallel connection then output volt 12v Amp?
2 4750For 6600/433 distribution transformer we apply secondary side 433 volts how much voltage in primary side.
2 4359whenewher three phase supply is given to induction motors revolving/rotating field is created & rotor rotates.When the three phase supply is given to three phase transformer then revolving,/rotating field is created or not? if not why?
1 2923how could we findout the lightning arrester failed or not in live circuit? Is there any instrument to measure the high voltage at the time of sky lighting?
1 3449Post New Electrical Engineering Questions
What is electrical grounding?
What is the role of feedback in a closed loop control system?
HOW WE CHOOSE EARTH'S POTENTIAL AS ZERO V?
Explain about technical and non technical losses in distribution system?
What are electric motors?
how to calculate regulation constants for over head lines? and what are the regulation constant for raccoon conductor at different voltage level and different P.F?
234 MVA Generator 3 phase Short circuit current Values required? Gen set Rating-234 MVA, Gen Voltage-18kv, PF;0.8, Xdv:23.5 %, Transformer Rating-18/380KV, 680MVA,Yndd1 two winding, Step up TR, ZT:35.50 %,X/R 4.33 Gen CB Position, CB open ,Disconnected open, Generator Running Voltage 18 Kv, Bi mistakes generator side earth switch Closed during that time short circuit current level in 3 Phase required, and how to test on site 234MVA Generator Short circuit current,
how to calculation increase power factor for single phase
which stabilizer is better ? AVR, Servo Stabilizer, Static stabilizer etc & why explain it
how to measure the transformer resistance values(dyn11)?and howmuch the minimum value?
WHATIS TIME CONSTANT? WHATIS ITS SIGNIFICANCE? ILLUSTRATE THROUGH EXAMLES.
is that a problem if i connect a single phase load to a secondry delta connected transformer but i get a neutral from other transformer i the system?
HOW WE KNOW IN PHYSICALLY THE CONTACT SURFACE OF A VACUUM INTERRUPTER IS GOOD OR GOING TO DAMAGE IN A VCB AFTER ABOVE 500 TIMES OPERATED.
hi I have done 3 yrs diploma in electrical engg after 10+2. I have 16 years of work experience into design proposals sales and engg application development in LV/MV swithcgear and sub station automation field. I want to apply for immigration to new zealand but I am not sure whether I qualify or not since I dont have a degree. Can anyone advice? Thanks Riz
Control cables in S's will carry 1000v which is AC R DC? Pls answer me