Interested to Buy Any Domain ? << Click Here >> for more details...
can three phase induction motor rotate with only 2 phases
connected
- 22 Answers
- 57663 Views
- Delta, Mannar Company, Suntron, I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
Answer / sri
If the motor is in idle condition and if u want to start
the motor and rotate it will give u a humming noise only
and will not rotate.But if it is already in running
condition and suddenly if it happens to run in the two
phase it will run ,and gradually it will get over heated
and at one stage it will trip or burn
| Is This Answer Correct ? | 91 Yes | 3 No |
Answer / deependra shakya
Yes a three phase Induction motor can run by 2 phase.
| Is This Answer Correct ? | 42 Yes | 8 No |
Answer / jessy
Suppose 3 phase induction motor is running but if one phase
trips, it will continue to run but at reduced torque -
jessy
| Is This Answer Correct ? | 20 Yes | 4 No |
Answer / kandavel
yes, If the motor is in idle condition and if u want to
start
the motor and rotate it will give u a humming noise only
and will not rotate.But if it is already in running
condition and suddenly if it happens to run in the two
phase it will run ,and gradually it will get over heated
and at one stage it will trip or burn
| Is This Answer Correct ? | 17 Yes | 3 No |
Answer / ram
Yes possible. Using capacitors you can run three phase
induction motors with high current rating. Normal current
rating is 1.5 amphere per HP for each phase;but for two
phase it will go up to 2.0 to 2.5 amphere for each phase.
Method: You can use running capacitors with 440 rating.For 1
Hp you need 12- 15 mfd capacitor/for 5 HP you need 60-70
mfd.You can make new phase via this capacitor from any one
of the remaining phases, if motor runs in reverse connect
capacitor in the other phase. For starting you may have to
add additional 100 mfd in parallel with the capacitor
previously described via make break switch of suitable
current rating for a moment.
| Is This Answer Correct ? | 15 Yes | 1 No |
Answer / dum
but sri, i have one experience, the motor was in idle
condition. but with only 2 phases it rotated. can anybody
explain how a rotating magnetic field is created when there
is only 2 phases
| Is This Answer Correct ? | 7 Yes | 4 No |
Answer / gunasekaran
IT will rotate because due to the phase displacement B/w
two phases so average value is no zero for two phase
circuit so torque will produce. at the same time it is not
running full speed and it draw around two times current
from sys so wdg of another two phase getting heated up if
it small motor OLR will give trip if it big one negative
sequence giving trip comment
| Is This Answer Correct ? | 3 Yes | 2 No |
Answer / bhasheer
only two phase will never create rmf in three phase motor... we need a capacitor to create three phase rmf. while using the capacitor the motor starts to rotate but the starting torque will reduces....
During the normal running condition of three phase motor, if one phase fails, the motor will run continuously when there is no load in the shaft.
At the same time if the motor is connected through the starter,the over load relay in the starter trips and the motor will stops....
| Is This Answer Correct ? | 1 Yes | 0 No |
Explain what is use of lockout relay in ht voltage?
How much current in 100 kva Transformer HT & LT side
pls give me brif explaination about the distance relay.
how we can know the rating of transmission line by no. of insulators disk ??????????
can a 50 Hz transformer work satisfactorily if placed under 60 Hz,what are the prices and losses that will arise
Hello sir i m student of gtu .what is idp.
please describe the Transformer setting, Motor setting, I/C setting, Tie setting
what is the formulae of calculating voltage drop?
area control error
3phase cable calculation formula by motor load
When we change the tap position of 10MVA transformer it suddenly tripped with Out of step indication and also with Static differential relay indication, Transformer Bucholz relay indn and Low oil level indication. Before 1 week the same problem occured by changing the tap position. but at that time only oltc bucholz relay activated. After testing the TxR Relay team & PET team cant find any solid reason. The values are ok also. So plz answer wat's the reason for this incident? anybody plz help.
why star 2 delta or delta to star preferred mostly then star to star and delta to delta ?
-
Civil Engineering (5086) - Mechanical Engineering (4456)
- Electrical Engineering (16639)
- Electronics Communications (3918)
- Chemical Engineering (1095)
- Aeronautical Engineering (239)
- Bio Engineering (96)
- Metallurgy (361)
- Industrial Engineering (259)
- Instrumentation (3014)
- Automobile Engineering (332)
- Mechatronics Engineering (97)
- Marine Engineering (124)
- Power Plant Engineering (172)
- Textile Engineering (575)
- Production Engineering (25)
- Satellite Systems Engineering (106)
- Engineering AllOther (1379)
