Interested to Buy Any Domain ? << Click Here >> for more details...
why do we use star-delta starter. what is its need?
- 6 Answers
- 49392 Views
- I also Faced
- E-Mail Answers
Answer Posted / d.ramesh classes
Technical explanation
When the windings of a 3-phase motor are connected in STAR:
the voltage applied to each winding is reduced to only (1 /.'/'3) [1 divided by root three] of the voltage applied to the winding when it is connected directly across two incoming power service lines in DELTA.
the current per winding is reduced to only (1 /.'/'3) [1 divided by root three] of the normal running current taken when it is connected in DELTA.
so, because of the Power Law V [in volts] x I [in amps] = P [in watts],
the total output power when the motor is connected in STAR is:
PS = [VL x (1/.'/'3)] x [ID x (1/.'/'3)] = PD x (1/3) [one third of the power in DELTA]
where:
VL is the line-to-line voltage of the incoming 3-phase power service
ID is the line current drawn in DELTA
PS is the total power the motor can produce when running in STAR
PD is the total power it can produce when running in DELTA.
by D.RAMESH CLASSES
| Is This Answer Correct ? | 19 Yes | 8 No |
Post New Answer View All Answers
can any one suggest me the tilt angle of my solar pannel ?? or tell me how can i know the fix tilt angle of my solar pannel?? my cordinates are 31.503629,72.993164.
how to find the capacitance value of the motor while running??
What are steps to be taken while designing of DYN11 distribution transformer to achieve magnetising balance?
why constant voltage transformer should be start without load? and if started then what will happen?
how to check ac servo motor
Can I use star delta connected induction motor for dual supply voltage?
List examples of voltage source?
what is the calculation method to design core and winding of a 200kva 3phase distribution transformer?
What is an order of a system.
State and define ohm’s law?
Explain the process of commutation in a dc machine.
State and define norton’s theorem?
what is the role of transistor in Circuit?
What kinds of decision are made about CT from it's Knee point(voltage & current)?
An active element is one which a. Supplies energy b. Absorbs energy c. Supplies energy and convert energy from one form to another
