to vary valtage from 0 - max a variac is necessary . so how to design for high power applications nearly about 200KW power
2072How you calculating the current for a 2.5 Sqmm cable. A 30 Hp 3 phase AC motor of power what size of cable is used for this motor.
7 24505What happens with squirrel induction machines if the ends of rotor conductors are kept open? Explain
5 7522How we can change the direction of rotation of Induction motor? Prove it using graphical methods.
4 7248Post New Electrical Engineering Questions
sir please send me previous year questions of jspl of electrical section through which i could prepare myself fpr the test.
What is the best thing to protect the motor from running over full current. CT or O/L or pressure transducer at the given pressure rating
what is doubling factor in making current of a breaker?
Please clarify 1. Icw: rated short circuit working withstand capacity 2. Icu: Rated ultimate breaking capacity 3. Ics: Rated service short circut withstand capacity 4. other specification of ACB
a)In a 3-phase 4-wire circuit, a circuit breaker is selected to protect the circuit whose highest fault level is 6.6 MVA. Determine the required minimum breaking capacity in kA. (Note: Covert 3-phase power in terms of kA to find answer.) b)Using the below, determine the required minimum making capacity in kA as a “peak value”. Rate breaking capacity (Icn) ka: Icn<= 1.5 Factor = 1.41 1.5
What is grid collapse? what is the reason for it?
WHAT CAUSED THRESHOLD VOLTAGE TO EXIST?
How to minimize the eddy current losses?
in an electronic tri vector meter when the current and voltage sequence changes ? what is the effect of phase sequence on recording of meter
Hi everyone. Some Generators uses 3-Pole breakers with extra contactors for Neutral. Some uses 4-Pole. Why so? What is the idea behind this? Thanks in advance for the solution. Kr.
Basic motor transformer generator
Please brief me about number of pole in alternator.In single phase alternator coils are connected in star or series. How to calculate frequency for the same.
What is a dc motor?
What is the general system requirement of alternator?
Hello everyone, somebody knows what is a "surplice power" ? The hole phrase is: "This rating is appropriate for a generator set paralleled with an infinite bus e.g. a national electrical supply network or grid where the generator set is run at 100% load, 24 hours a day, 365 days a year and any surplice power is exported into the grid" Thanks in advance.