Explain principle of Soft-starter & how its working???

Answer Posted / muhammad ashraf

Soft starter is a device which controls satarting Current
of the motor. it start the motor from 0 to 100% slowly.
meanwhile it save the electrical power and reduce the loses
and starting tarque.

Is This Answer Correct ?    22 Yes 5 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

how to find 5 kilo meter long under ground 33 kv cable fault location if IR VALUE shows 0.05 M ohm @5000 volt.and cable fault locator shows some time fault distance 3 kilo meter ,3.7 kilo meter and some time 1 kilo meter? now how to find the fault location that where is leakage. note--it is tested with 5000 kv megger and insulation resistance is 0.05 M ohm. and some time 0.03 M ohm comes.

1845


i want to model paper for section engg.

1667


I have an existing old MCCB. ABB Model SACE, the rating are: Ue = 660 volts, Iu =1250 Amps, 3 poles, Ith (max) =800 amps at 45 deg C. I need a circuit breaker for my 3 phase motors, 380 volts 60 hz. the supplier required the minimum ampacity of the breaker to be 911 amps. can i use this breaker with rating of Iu =1250 amps but Ith = 800amps maximum?

1904


State how to produce a constant rotating field by application of alternating currents to stator armature of a three-phase squirrel-cage induction motor

2116


how can we phase identification in a distribution line,how we recognise that which phase is coming for a house hold connection.help me............

1687






What is the minimum distance to be maintained in between HT panel and LT panel and Instrument panel as per IEC and NEC standards?

1336


a governer in an Ic engine controls the

789


which protection function should measure RMS value of current&DFT value of current?

1617


If short circuit ratio is high is it bad or good for a machine then tell the reason...

1683


how calculate the electrical load for industry and office

8548


what are the effects when a salient pole alternator is run at high speed like 3000 r.p.m?

2055


Why do not we prefer non conventional sources of energy to conventional sources?

785


what will happen if the prime mover on the field excitation of the on-coming generator fails?Explain.

5135


how to calculate earth fault relay current and CBCT ratio

7899


how to find the torque of the single phase synchronous motor by doing an experiment

1608