What is the d/f between DOL & star delta starter & automatic
star delta starter?
Answer Posted / cool
Whenever you start a big heavy electric motor, you need to
start it slowly to prevent the rotor overheating and
drawing an enormous current. When the windings of a 3-phase
motor are connected in STAR the current is reduced to only
root three of the normal running current that is taken when
it is connected in DELTA.
| Is This Answer Correct ? | 141 Yes | 19 No |
Post New Answer View All Answers
How to calculate the no of Ceiling fan (1200mm sweep) per unit area?
what is sustainable current of any conductors . a bare busbar or pvc cable has different sustainable current .
What is the principal of motor?
How to decide DO set rating of Transformer?
why the electrolyte level in lead acid battery is maintained 2.5 cms above electrodes?
how we can find of current direction(supply comming/out going direction) when a transmission line passing through sides.
Name two low frequency oscillators?
What are gain margin and phase margin?
3phase motor can be used as a Prime mover for alternator.
how does directional relay work incase of ac ?
What is EHT tariff or Power factor Tariff ????
WHY EARTHING NOT NEEDED IN BATTERY IN SUBSTATION
we have two generators different capacity on 15 MW and other 6MW at 11 KV , 15 MW gen. bus short level current 40KA,and 6MW short level current 25KA,, length of cable 100MTR between 6 MW from 15MW gen. for bus coupling . kindly tell any one can we use both NGR OR one NGR from any GEN. BOTH NGR has diff. rating. Tariq pakistan
why different series of vfds (like allenbradley)are used in industry ?
how can decide the current rating of oltc