Interested to Buy Any Domain ? << Click Here >> for more details...
WHY TRANSFORMERS ARE RATED IN 11KV 22KV 33KV Instead off
10kv 20kv 30kv
- 5 Answers
- 22615 Views
- I also Faced
- E-Mail Answers
Answer Posted / chandru_williams
1. When an alternator generates voltage, its rms value is
given by 4.4*f*$*t, where $ is value of total flux per
pole. So we can see all the voltages are made inevitably
multiple of this value (1.1, which is the form factor of
ac wave). Also it provides us the best economic
construction of step up and step down transformers.
2. We always use a multiple of 1.11 bcoz for a pure sine
wave the FORM FACTOR is the ratio of rms value of voltage
or
current with the avg. value of voltage or current and for
pure sine wave rms value of current is Imax/root '2' and
avg. value is 2Imax/pie. and which comes out to be 1.11 so
we cant have a combination of other then a multiple of 1.11.
| Is This Answer Correct ? | 26 Yes | 4 No |
Post New Answer View All Answers
Why neutral point is consider as zero potential?
WHAT IS THE SIGNIFICANCE OF VECTOR GROUPS IN TRANSFORMER? WHAT WILL BE EFFECT WHEN PHASE DISPLACEMENT CHANGES IN TRANSFORMER?WHAT IS THE NEED TO BE PHASE SHIFT CHANGE BETWEEN THE PRIMARY AND SECONDARY WINDING
In general bus riser follows the bus section in SWGR. What are impacts if bus section follows bus riser?
What determines the thickness of the lamination or stamping?
do anyone out there know where to find a compleete list on acronyms/abbreviations used in offshore electric engineering. MCB - Micro Circuit Breaker, MCCB-Mouldes Case Circuit Breaker, ELCB-Earth Lekage Circuit Breaker, ELMCB- etc.....
If mutual flux is 1.2wb & power factor is 0.8 lag , then what is the Useful flux of a transformer?
what is the difference between single ratio, multiple core and multiple ratio, multiple core ? please explain.
what is excitation/
what is buffer resistance starter.?.What is the working principle and where it is used..?
8. A DYNAMOMETER TYPE WATTMETER RESPONDS TO THE.......
What happens if i apply 500V to 440V rotary Switch ?
What are the different towers used in 132kv transmission line? what are the differences between the P,R,S towers used in 132KV and detailed explanation
what is the difference between switchgear and circuit breakers and is there any difference between outdoor and indoor switchgear and circuit breakers , and how would you differentiate between switch yard and substation and grid station . thanks
what is meant by power and distribution transformer ?
what is a pulse transformer? how rise time of pulse changes when ever the voltage changes?
