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what is the difference betweem star connected motor & delta
connected motor?
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Answer / a. v. ramana reddy
A star connected motor takes less current compared to a
delta connected motor since the phase current is 1/sqrt3
times the line current, but torque developed by the motor is
affected, since starting current is heavy in order to reduce
the heavy inrush current we place a star delta
starter.....so tat starting current can be comparitively
small...the reason for shifting to delta connection(after
motor attains 80% of the rated speed)is the power output of
the motor wil be 3 times the output wen it is connected in
star.....it doesn;t mean tat the m/c 3 times more efficient
than star connected one..but correspondingly the power drawn
by the motor also increases.........
comments r welcome....
| Is This Answer Correct ? | 175 Yes | 40 No |
Answer / s.r.ramalingam
PHASE CURRENT AND PHASE VOLTAGE IS THE MAJOR DIFFERENCE...
IN STAR CONNECTION,
PHASE CURRENT IS EQUAL TO THE LINE CURRENT.
THT IS,
I LINE = I PHASE
BUT,
V LINE = ROOT 3* V PHASE
IN DELTA CONNECTION,
PHASE VOLTAGE IS EQUAL TO THE LINE VOLTAGE.
THAT IS,
V LINE = V PHASE
BUT,
I LINE = ROOT 3* I PHASE.
| Is This Answer Correct ? | 109 Yes | 12 No |
In star connection motor is taking low current and produce
high torque and in delta connection motor is taking high
current and low torque.to start the motor from stand still
condition we requeired high torque so first motor should in
star connection and then it should have conti. with delta
connection.
| Is This Answer Correct ? | 183 Yes | 149 No |
In star connected motors power consumption will be less
compared to delta connected motors.
| Is This Answer Correct ? | 45 Yes | 22 No |
Answer / krishna
star connected motor gives a more torque compare to delta
connected.
| Is This Answer Correct ? | 60 Yes | 45 No |
Answer / k.mohan kumar
In star connection motor is taking low current and produce
high torque.
In delta connection motor is taking high current and
produce low torque.
In star more power consumption.
In delta less power consumption.
In star connection phase current is equal to line current.
In delta connection phase voltage is equal to line voltage.
In star line voltage is equal to 1.732*phase voltage.
In delta line current is equal to 1.732*phase current.
| Is This Answer Correct ? | 23 Yes | 10 No |
Answer / lovepreet
Bt how it is possible that in star connected motor takes less current nd produce more starting torque than delta connected motor while speed is same????
| Is This Answer Correct ? | 6 Yes | 1 No |
Answer / arthur
Delta connection has a high starting torque which is not our interest since it comes with extremely high current. To reduce this current which only occurs during starting,we use star with relatively low current and low torque.
| Is This Answer Correct ? | 5 Yes | 1 No |
Answer / yasirfraz
STAR CONNECED MOTER TAKE LESS CURRENTAND GNRAT LESS
TOURQE,IN DELTA CONDETION TAKE MORE CURRENT AND DEVLOPED
MORE TOURQ.
| Is This Answer Correct ? | 19 Yes | 17 No |
Answer / pallav
star connected motor voltage is high then delta connected motor. then voltage is increases then current decreases. means delta connected motor speed is high as compare to star connected motor
| Is This Answer Correct ? | 0 Yes | 1 No |
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