Why are the HV motors are connected in star connection?
Answer Posted / arpit sood
one of the reason according to me should be that a motor
with star connection draws less starting current (5-8 times
less)
so if the motor is HV then there will be less voltage
fluctuation and less heating of the insulation of the motor
at starting
so the motor is better protected and does not start with a jerk
but generally the large motors are designed for delta
connection due to more mechanical power ( 3 times more than
the star connected) so there is need of auto transformer
starting
Is This Answer Correct ? | 2 Yes | 7 No |
Post New Answer View All Answers
Don't you have similar question banks related to Oral Certification Examination conducted by Mercantile Marine Departments / Directorate of Shipping, Ministry of Shipping for Electro Technical Officer?
how the phase convertor changes the no. of phases
how does ELR works? explain
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
I have motor 1500 HP and , 4160 V , 60 HZ , then i need the rating of transformer which can feed that motor ??
Define what is the function of anti-pumping in circuit breaker?
In power transmission using open belts or horizontal shafts it is preferable to have the slack side of the belt on the top because
how we test a 3 phase motor on single phase supply....? HOW WE RUN A 3 PHASE MOTOR ON SNIGLE PHASE. supply for testing..? how we verify of a 3 phase motors 6 wire & name thame a1/a2/a3..b1/b2/b3 and c1/c2/c3 for connecting star delta starter ........i have only 1 phase supply ? help forum..........
Classify milling machines.
What is open delta Xformer? It's adavntages & Use?
Difference between on line capacitor and Station type capacitor
ow can i get certificate of competency as electrical supervisor and my diploma in electrical engineering from jalgaon.
please send privious years question papers of jindal steel and power ltd.My e mail id is rajanikant.sngh@gmail.com
Draw transformer phasor diagram.(full load,no load)
How to Prepare preventive maintenance shedule of machine tool.