Why motor initial starting current is high?
- 9 Answers
- 59517 Views
- Pennar, I also Faced
- E-Mail Answers
Answer Posted / guest
During starting
1.In a DC motor the back emf is zero
2.In a AC motor the frequency is zero(slip is 0),hence
reactance(z) is zero,I=(v/z) hence current is infintiy
| Is This Answer Correct ? | 22 Yes | 52 No |
Post New Answer View All Answers
What are the specifications for getting approval of Substation?
what is the criterion for selecting vector group of Transformers ? i mean how to decide vector group of Generator transformer, substation trasformer and transformer at consumer end
In MEP Services what are parts of STP and what are there function?
what is W.T?specify the acceptable range?
In the magnetic fluxes, what is the role of armature reaction?
As we know induction squirrel cage motor torque Directly praprortinal to applied voltage in star connection & delta also. If I connect 55KW Motor to DOL starter in load condition does motor withstand the load & what will be the current withdrawn ? motor will not fail ?
Why armature rheostat is kept in maximum position?
how can i apilly for electrical c licencese.sir,i completed B.Tech in electrical & electronics engineering in 201onot working any company
What is MS-EXCELL?
What is the lockout relay
234 MVA Generator 3 phase Short circuit current Values required? Gen set Rating-234 MVA, Gen Voltage-18kv, PF;0.8, Xdv:23.5 %, Transformer Rating-18/380KV, 680MVA,Yndd1 two winding, Step up TR, ZT:35.50 %,X/R 4.33 Gen CB Position, CB open ,Disconnected open, Generator Running Voltage 18 Kv, Bi mistakes generator side earth switch Closed during that time short circuit current level in 3 Phase required, and how to test on site 234MVA Generator Short circuit current,
1.what is difference in maintain Hz again Hz in USA ? 2.how to calculate the battery AH? 3.why are yearly maintained in transformer how many tests in required?
i have flexible wire. size of conductors is 0.190 mm & no.of conductors are 48. then size of wire comes 1.37 sqmm instead of 1.5 sqmm . the what is tolerance for this size.
Give idea about General Engineering. From which book i can study this topic. Pl. reply me via email. My email is ravi@bhelhwr.co.in, also give the name of book/website, from where i can prepare it.
Why do not we prefer non conventional sources of energy to conventional sources?
