One 15kw motor Why we used star delta feeder?why not used DOL
please explain in details
Answers were Sorted based on User's Feedback
The star delta starter limits the starting current of the
motor by reducing the voltage across each winding. In star
the voltage is equivalent to the phase to neutral of the
power supply. In delta the phase to phase voltage is
applied across the windings.
With a DOL starter the phase to phase voltage is applied
across the windings. The starting current can be in excess
of 7 times the full load current.
The main reason for using star delta starters is that the
power supply system to the motor does not have to support
the high current needed for DOL starting. If the power
supply is not able to supply the current a voltage dip will
occur affecting all other users on the supply.
Is This Answer Correct ? | 11 Yes | 1 No |
We can use dol stater up to 5HP (dol stater can
not control starting current of motor but protect
by them up to 5HP). We have been using dol
staters to lower rating ac motors due to low cost.
Is This Answer Correct ? | 3 Yes | 0 No |
Answer / vijendra joglekar
The Main purpose of using starter in motor to limit the
starting current as you know evry starter have there own
limitations i.e rating,inrussh current holding capacity as
you told 15 kw motor cant use DOL starter because of its
limitaions its not with stand motor rated current .
Is This Answer Correct ? | 0 Yes | 8 No |
what happen when dc shunt motor field is sudden open in running condition
34 Answers APGenco, Bhel, IIT, JMRC, TCS,
why sometime we get electrical shock while touching the ballon of dish tv connection ? which we should not get.
why ceiling fan give hising sound
Why we are always only used 11 kv. , 22 kv ,33kv in transmission line? Why not use 25, 55 ,65 kv ?
3 Answers Khidmah LLC, Precision Camshafts Limited,
what is the relation between KVAR,KVA,KW?why we are mentioning capcitor rating in kvar?what is meant by arcing horn and horn gap in transformer?what is equipotential wire?
is EEE eligible for getting electrical supervisor certificate ? if yes then from which state i sud apply
If induction motor load is incresed motor speed decrases.But in syncronous motor load incrases speed canstant why?
2 v/500amp/hr to 1.80vpc at 20 degree celsious 2v/5ooamp/hr to 1.75 vpc at 77degree farren .this is the capacity of a battery .what is the meaning of this . can i get a detailed explenation
what is impedence of transformer? its formula
how water and air molecules are conduct the heat?
What do you mean by Transformer?
9 Answers Hyundai, NTPC, wbsedcl,
i am going to attaned the engineer (disign)iterview at HAL please give me duid line