why is it that the HT motors & motors having very low kW
rating(<1kW) have windings connected in STAR, whereas the
motors having in between kW ratings have DELTA connected
windings??
Answer Posted / saurabh
During Design it self it is take in consideration
As Power = Torque x Angular Velocity(RPM)
So for same RPM(say 1500 rpm), for Same Input Voltage
1) In star connection Torque will be less hence Power
output will b less
2) In Delta Connection Toruqe will be More hence Power
output will b more
as far as HT motors are concern, in order to limit inrush
current star connection could b given.
| Is This Answer Correct ? | 6 Yes | 3 No |
Post New Answer View All Answers
What is the formula formula for Busbar sizing and what are the things to be consider for Busbar Calculation?
i completed my DEEE. and i want to electrical c license. how to get it..?
How to calculate the heat load for a electrical room
when we have to use UPF wattmeter and LPF wattmeter? what is the difference between UPF and LPF wattmeter in terms of construction?
What is the difference between PLC and Embeded system
dc supply given to dc generator winding.how is possible? my knowledge is saying the winding will burn. please reply.
if we look on phasor of the transformer vaoltage is 180 oppsite at primary and the secondary so to improve a power factor is secondary should kept negative to improve it primary side means is -.90 became +.90 at other side
How can I calculate the Mega watts required to run a plant having many electric motors and other electrical components.
how to calculate the tarriff for an industry whose kva demand is 10 mva
in ACB breaker requireding 3200Amps. buscoupler getting OFF mode and again it reset and getting normal position give me a required answer?
Is it good to short Neutral and Ground in the PLC or DCS main Power supply. Pls give YES or NO with reasons...? Simarpreet
IF % IMPEDANCE OF A TRANSFORMER IS INCREASED FROM 5.8% TO 8% HOW MUCH THE EFFICIENCY OF THE TRANSFORMER WILL COME DOWN?
please anybody help me to find out the BHEL trainee Exam previous year questions papers . if u ve pls. send it to surekhared@gmail.com
1) why a dg set shows variation of power factor and load when synchronised with other dgs? 2)Why the load sharing is not become equal in all dgs?. 3)When a dg set will not run on auto start?
Starting times for soft starter & power factor is thier any standard or datas available in manufactures list. Kindly suggest.