Interested to Buy Any Domain ? << Click Here >> for more details...
what is subtransient , transient and study state ac components
- 2 Answers
- 10194 Views
- I also Faced
- E-Mail Answers
Answer Posted / chunkey pandey
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.
Transient Reactance:-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 ? | 0 Yes | 0 No |
Post New Answer View All Answers
What is meaning of out of phase (making & breaking) capacity And how to calculate
What is EMC filter in VVVF Drive ?
Please help me regarding my one concern. - During earth pit testing we noticed that the Clean earth pit and dirty earth pit showing continuity (Resistance value - 5ohm) . I want to know that if both earth pit have separate location and there is not internal looping between PIT then why such continuity is showing on it . Because of this issue the field side all earthing point showing short. In PLC panel we are providing two types of earthing cable which is coming from separate earth pit (Clean and Dirty earth pit) because of earth PIT showing short our PLC is not complying spec . please help regarding this issues.
Importance of fault current in power transformers and how to monitor the same? How is it different from winding temperature?
in Telecom DC system-why positive +ve is made earthed.and - ve is fed to load.
Define rise time.
While testing LA mast,What are the parameter limits ?
what is PWM in IGBT and how it works for drive.?
earth also having a gravitational force (magnetic field of north and south)but it attracts any object compare to this theartifical magnetic cant perform same as earth why?
why -48 volts dc used in telecommucation
how many types are their in switchyard or substation(like D,I TYPE), what is differant between them
Cb closed condition if there is a tcs fail whether cb will trip or not
Which level of the Transformer oil got dielectric strengh? And why?
IF 8255 CONTROL WORD IS 94H,Tell the chip port work mode ?
what do you mean by type zero control sytem ?Give an practical example of type zero contol sytem?
