where we use stardelta starter and dol starter
Answer Posted / nimish
where rating of motor is below 5 h.p. normally D.O.L.
starter is used and above that star delta starter is used to
limit the starting current.
| Is This Answer Correct ? | 14 Yes | 0 No |
Post New Answer View All Answers
A 10 MVA, 66KV, 50Hz, Y-connected 3-phase alternator has synchronous reactance of 0.635 Ù. It is working at full load at 0.8 lagging p.f. condition. Find torque angle, neglect armature resistance.
I HAVE BEEN SELECTED FOR APGENCO A.E(ELECTRICAL) 2008.HOW MUCH WEIGHTAGE FOR INTERVIEW AND WRITTEN TEST.HOW I HAVE TO PREPARE. PLEASE GIVE INFORMATION IF U KNOW.WHAT ABT G.D THIS TIME.CALL RATIO 1:2
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?
why US countries maintains 110v and 60HZ
Dear friends, i would like to know that what is the exact function of 'exciter winding' & 'aux winding' in Alternator?
what will be the min and max voltage flow from neutral to earth?
hi if anybody got model questions for cpcl Grade'A' electrical engineer position.send it to my mail please krishkumar22@gmail.com
Why 15Amp. MCB is suitable to carry load of 1.5Ton Ac please Explain?
plz send me the syllabus or any sample paper for engineer trainee recruitment if any,on ravinder911@yahoo.com
What is cable tray, its type, and its support?
difference between a diode and thyristor?
What are the necessary components of the feedback control system?
Sir, My doubt on cable sizing calculation, Load:74 KW calculated cable 1 run 50mm2. Now client asking us to reduce cable size by increasing runs. Sir, My question now when my mind strikes with 2 options 1) Divide load 74/2 = 36 and calculate cable for 36+36 making it 2 runs or 2) Simply i can divide 50mm2 /2 ie. 2 runs of 25mm2 Please suggest me sir
how meger function
Generation of voltage for each phase are same of a turbogenerator.Although the short circuit current flow when two phase of turbogenerator are shorted(where current can't flow without potential difference),why?