Interested to Buy Any Domain ? << Click Here >> for more details...
At site, we have 30Kw motor (3 phase, 400V,50Hz) and FLC
54A as per the nameplate. At the time of starting it draws
840A instead of 390A (7.2%). As per the data sheet also its
390A starting current. it thru a dol starter from the MCC.
can anyone tell what is the problem in the motor
- 5 Answers
- 11153 Views
- ME, I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
Answer / ranjan prasad
From the question motor terminal connection is not known.
However this problem may arise if you will connect the
motor in delta instead of star. First check the terminal
connection of motor, if it is in star, connect in the same
manner.
| Is This Answer Correct ? | 7 Yes | 3 No |
Answer / kannapa
do not use dol starer above 2.2kw rated motors
use star to delta starter it can withstand.
check also connections.
| Is This Answer Correct ? | 1 Yes | 0 No |
Answer / r.v.giribabu
First Check the healthyness of the motor.
1. Check the winding resistence
2. Check insulation resistance using megger.
3. Check the bearing and apply the lubricant as applicable.
4. Check the healthyness of connected load.
Follow above steps adn yoiu will identify the problem.
| Is This Answer Correct ? | 0 Yes | 0 No |
Answer / wani y.s.
First Check the healthyness of the motor -
1. Check the winding resistence
2. Check insulation resistance using megger.
3. Check the bearing and apply the lubricant as applicable.
4. Check the healthyness of connected load.( It should not
locked etc.)
5. If all above is OK. Then remove the motor from load &
ensure it is starting in ideal condition.( Hope connections
you are following up as given on the nameplate)
If it is starting in no load that means load GD squre is
high. Motor is taking longer time to start.You have to
select proper heavy duty DOL starter to withstand the
longer starting time. But ensure that motor is having
thermal time capacity to withstand this time.
7. You can also go for VFD as a starter this will definetly
will solve your problem no need to take care of thermal
time of the motor. Only select proper VFD to suit starting
torque of your application.
| Is This Answer Correct ? | 0 Yes | 1 No |
pl. check motors connection in terminal box if it is
connected in star then current may increased.
| Is This Answer Correct ? | 5 Yes | 13 No |
while conducting an experiment why we connect the armature rheostat in maximum position and field rheostat in minimum position
What is a feedback in control system?
CAN ANY ONE EXPLAIN THE KNEE VOLTAGE OF THE CT?
ELECTRICAL ENGINEER TEST IN FEWA ANY ONE HAVE KNOWLEDGE ABOUT THIS?????????
What consists of 2 or more thermocouples to be connented series?
What are the parameters of water ( Water quality )to be monitored in Centralised HVAC ( water cooler chillers )
it is difficult to interrupt a capacitive current because (a)it has a leading power factor (b)current magnitude is very small (c)the restriking voltage can be high (d)stored energy in the capacitor is high
2 Answers DGVCL Dakshin Gujarat Vij Company, MGVCL, UGVCL Uttar Gujarat Vij Company Ltd,
whta is difference between contactor and breaker.
How can ignition voltage of light increased with the help of a ballast
How to do bus bar short circuit calculation for 230KV/11kv, 60 MVA Substation?
Why a transformer is rated in kVA and not in kW??
what is induction relay
-
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)
