Interested to Buy Any Domain ? << Click Here >> for more details...
We have 800KW motor operating at 6600Volt,50 Hz
supply.During 1st startup it tripped on overcurrent
trip.It's FLA is 88 Amps.The K factor of Thermal overloaaad
was set on .94 initially.then we set at 0.97 and then it
started fine.i dont understand why it tripped first?What
are the protections which comes in picture during starting ?
- 6 Answers
- 9706 Views
- I also Faced
- E-Mail Answers
Answer Posted / ghani
It is right that starting current of this much big motor is
very high whihc varies as per data from 6 to 8 times, so if
the protection relay is of static or digital then there
must be a restraining setting for starting current with
time delay, so you can increas both values keeping the data
sheet of motor in view.
| Is This Answer Correct ? | 2 Yes | 0 No |
Post New Answer View All Answers
ELECTRICAL ENGINEER TEST IN FEWA ANY ONE HAVE KNOWLEDGE ABOUT THIS?????????
For some transformers we are using solid neutral earthing while some others we are using resistance earthing why ?
how to select proper cable for ct wiring so that drop within the limit.
how to find motors H.P. whout any rating? (only give you a motor and multimeter)
Advantages/Disadvantages of earthing of neutral bus on MSB instead of separate neutral earthing for transformer/DG sets feeding to MSB
Mention what are the different colors on wires indicates?
why the protection turbo generators is most complex?
why they were using TRIAC instead relay in some controllers and what is the advantages.
Difference between a pilot wire and a normal conductor?
what is the difference between electrical and electronic choke?
Why do we mostly prefer to generate and distribute electricity in 3 phase and not in 4 phase or 5 phase?
what is the interrelation between voltage current torgue speed and magnetic flux in case of different types of electric motors
List of equipments required foe industrial repair lab.
can you plz send l&t aptitude questions if available its urgent plz plz plz
What is the effect on in Zone and out zone fault if Phase side CT is Vk/2<30 mA and Neutral side is CT is Vk/4<30 mA for Transformer REF protection
