Interested to Buy Any Domain ? << Click Here >> for more details...
what's transient & sub- transient reactance means?
- 2 Answers
- 48543 Views
- I also Faced
- E-Mail Answers
Answer Posted / steven karris
These terms appear in the calculation of fault currents.
Common sources of fault currents are rotating machines,
i.e., motors and generators. An important factor in
detrmining the magnitude of a fault current is a variable
reactance that changes rapidly after the initiation of the
fault until it reaches a steady state.
Subtransient Reactance, usually denoted as X''d (X double
prime sub d), is the reactance used to determine the
current during the first cycle after the occurance of the
fault. In about 0.1 second this reactance increases to the
level known as Transient Reactance usually denoted as X'd,
and after 0.5 to 2 seconds it increases to the leven known
as Synchronous Reactance and denoted as Xd, and this
determines the fault current after a steady condition is
reached.
| Is This Answer Correct ? | 205 Yes | 27 No |
Post New Answer View All Answers
What are the reasons for the parallel operation of transformers?
i applied for c licence with my one year apperents trainee and i have attaced with A grade contractor company experiance that is for 14 monts experiance this document is sufeicant for c licence? pls tell why they rejected
why do you add the load short circuit impedance when considering short circuit amperage. It seems that you should only consider supply. If you need to consider loads and you don't know what loads are to be added , what would be a good sub-transient reactance rating for the loads?
how test transfomer(3 phase75kva) by megger
What is the need of generator relay panel
What is the Minimum winding resistance of motors ( small & big)? referance range
when it is possible kvrah lead & fundamental kwh be equal in electonic trivector meters (3 ph)
what are the values of VRY,VYB,VBR,Vry,Vyb,Vbr,Vrn,Vyn,Vbn for Magenetic balance test of 100 KVA and 63 KVA Distribution transformer
What does a Bode plot tell you?
What is the tipical Online UPS input voltage for 20 KVA load ( 3 Phase or 1 Phase )? Why ? Explain it...?
Why does the speed regulating system adopting I controller have no steady-state error? In this single closed-loop speed regulating system, when the input of the I controller Un=0, what is the output voltage of the regulator? What factors do the output voltage depend on?
for what purpose the star point is done in ct
can anyone provide me a amf panel control wiring using ec-2 relay?
are there rmu for 3 transformer?
a 100mva,400/200v transformer has leakage impdce of 10% draws a steady state line currentof---------------
