Interested to Buy Any Domain ? << Click Here >> for more details...
Normally the
starter used to
reduce the
starting
current.but the
dol starter do not
it,so why we use
it?
- 4 Answers
- 9626 Views
- I also Faced
- E-Mail Answers
Answer Posted / ionp
When DOL Starter is employed the motor is loaded with full
load voltage in starting, which causes high starting
current in the circuit.
Torque is proportional to square of Voltage so employing
DOL starter we achieve High Starting Torque. Which in turn
help Motor to attain its rated speed quickly.
Available Pull out Torque help load to accelerate quickly.
The starting current which can be 5 to 7 times of full load
current can be born by motor & Associated cables etc. for
few seconds during starting & does not causes any unwanted
heating & heat losses.
Hence we prefer DOL starters where high Starting Torque is
required.
On the contrary With Star-Delta starter Starting Voltage is
1/3rd of rated Voltage & Starting current is almost 3
times. This low voltage will cause insufficient torque in
starting & time taken to attain full load speed is more, in
turn more heating & losses. Also when Motor switches to
delta mode the current kick is almost 5 times the FLC, Thus
system is subjected to 2 current kicks.
| Is This Answer Correct ? | 2 Yes | 1 No |
Post New Answer View All Answers
what is meant by 3rd hormonics ?
What does the term “voltage regulation” means?
Briefing the effects of ASR and ACR of a double closed-loop speed regulating system.
Please give me a erda placement paper
My question is abt backlog.I had dropped one subject in my second year, and completed this subject in the 3rd attempt, so how many backlogs i have got?1 or 3?plz sujjest the answer as soon as possible
what topics we have to concentrate for power grid et.written test.and tell what to read for english synonyms and antonyms.
what is submersible pump?what is different between motor and sub motor?
What is the kiosk parts, about them and their functions ? If anybody have some PDFs files or details about this plz send it on tawhidfaisal@Yahoo.com
how can maintaince the acb contactor moveing and fixing kit
sent to a site and asked to explain how you would like a twenty seven flour building should be supplied with lighting and sockets plus a water boiler.
How to determine stage of Automatic Power factor controlling Relay(Apfcr)?
Name the component u would expect to find in a switchgear assembly?
In the formula : Knee point voltage = Burden X alf / class, Please inform what is alf? regards Shashidhar M.R.
what are the sample questions asking to the test cunducting for electrical superwising lisence test?
Starting times for soft starter & power factor is thier any standard or datas available in manufactures list. Kindly suggest.
