Interested to Buy Any Domain ? << Click Here >> for more details...
why the motor running in delta connection ? it can be in star?
- 13 Answers
- 57206 Views
- NTPC, I also Faced
- E-Mail Answers
Answer Posted / maged
Simple 3 phase motors can be connected in either STAR or
DELTA.
In star the maximum power is reduced but the starting
current is lower than for Delta
In Delta the motor gives maximum power but the starting
current is often too high and the overload trips out.
To overcome this a star/delta starter is fitted
All 6 wires from the motor windings are connected to the
starter and the starter functions are as follows :-
When start button is pressed the motor is automatically
connected in star and the start current is acceptable. At
the same time a timer is initiated and after a
predetermined time the starter automatically changes from
star connection to delta. The motor now runs in Delta until
switched off.
This is a fully automatic starter, many years ago manual
changeover star/delta starters were more common.
| Is This Answer Correct ? | 20 Yes | 6 No |
Post New Answer View All Answers
Why we use mho Relay in long transmission line?
What is meaning of out of phase (making & breaking) capacity And how to calculate
What is the use of Surge Capacitor in LAVT?
how electrical earthing maintenance done in industry?
what is the function of bearing in dc mchine" and where it is placed
how to make an earthing certificate
What type of core material is used for metering C.T and protection C.T???
why motor range is available 22kv,30kv,37kv,45kv and so on? why motor range is not available 21kv,24,25,26,27kv and so on?
Hi Everyone ! My Name is Hakim ullah khan please i need formula of Cable Rating because i want to calculate by self without check any Table Chart... Thank you.....
What do you mean by distribution transformers?
How to set the relay,,??
How to do bus bar short circuit calculation for 230KV/11kv, 60 MVA Substation?
why core is useful for a transformer ?and also in its operation ?
A 230V dc shunt wound motor has an armature resistance of 0,15Ω.When operating on no load at 650 rev/min the armature current is 6A . The motor takes a full load current of 85A. Calculate the full load speed if the field flux is (i) maintained constant (ii)reduced by 0,03
EXPLAIN USE OF ROCKING ARRANGEMENT IN ELECTRIC HEATING?
