why transformer impedance measure in % (percentage)
Answers were Sorted based on User's Feedback
Answer / subbarayalu
The normal method
of expressing transformer impedance is as a percentage voltage drop in the
transformer at full-load current and this reflects the way in which it is seen by
system designers. For example, an impedance of 10% means that the voltage
drop at full-load current is 10% of the open-circuit voltage, or, alternatively,
neglecting any other impedance in the system, at 10 times full-load current, the
voltage drop in the transformer is equal to the total system voltage.
Is This Answer Correct ? | 4 Yes | 0 No |
Answer / anonymous
It is because three phase system is most economical out of all possible polyphase system configurations...that's it...
Is This Answer Correct ? | 1 Yes | 0 No |
Answer / sokib
why did electric polyphase system commonly using three phase
system? is there any electrical system more than three phase
system?
Is This Answer Correct ? | 0 Yes | 0 No |
Answer / 7anoter4
Usually group of transformers presents the same short-
circuit reactance in %
For instance, for S[ rated power] up to 2500 [to 3000] kVA
the percent reactance will be vk%=4-8. Ohmically calculated
reactance will be V^2/S*vk%/100 [ V=rated voltage].
For V=10 kV and vk%=6 for S=500 kVA Xk=10^2/0.5*6/100=12
ohm
For V=6 kV and vk%=6 for S=3000 kVA Xk=6^2/3*6/100=0.72 ohm
As one could see it is more convenient to consider only
vk% instead of ohmic reactance
Is This Answer Correct ? | 0 Yes | 1 No |
sigal phase supply is 230 v ac two phase supply is 415 v ac why three phase supply is 415 v ac why not 690 v ac
What type of a DC motor would you use for a lift?
How Size of Busbar is determined for a particular load.
sir, Two different rating of generator going to connect parallel, can it set same DROOP or different. Why? Please explain
What is the Difference Between MCCB & ACB & VCB
58 Answers Absotherm, Delton, Divine, JLL, Jyoti Ltd, Kirloskar, L&T, RPP, Siemens, TCL, TCS, Teekays, YSJ,
what is the effect of connecting three phase supply lines to three phase auto transformer output terminals through a fuse of 10Amp and a circuit breaker (MCB). Is this connection permanently destroy the transformer?
HOW TO CALCULATE HV CABLE SIZING?
What safety precaution are to be taken for avoiding electric hazards ?
why can tv operate at low voltage??
why the transformer connected like STAR- STAR, DELTA- DELTA, STAR- DELTA, DELTA-STAR ...? why these connections ,,, explain the advantages these connections?
R=*¶ l/a
What is the difference bet ween EDO Type & MDO type ACBs, and what is the advantage EDO Type over than MDO type ACBs.