WHY TRANSFORMERS ARE RATED IN 11KV 22KV 33KV Instead off 10kv 20kv 30kv

WHY TRANSFORMERS ARE RATED IN 11KV 22KV 33KV Instead off
10kv 20kv 30kv

Question Posted / gopalakrishnan

4 Answers
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WHY TRANSFORMERS ARE RATED IN 11KV 22KV 33KV Instead off 10kv 20kv 30kv..

Answer / bala123

Because the Form factor of AC system is 1.11,thats why the
voltage rating from the transformer was above format

Is This Answer Correct ?

83 Yes

10 No

WHY TRANSFORMERS ARE RATED IN 11KV 22KV 33KV Instead off 10kv 20kv 30kv..

Answer / syam kumar

beacuse Tranformer output voltage is given by the equation

E = 4.44f(phi)N

so Voltages are multiples of 1.11

Is This Answer Correct ?

32 Yes

6 No

WHY TRANSFORMERS ARE RATED IN 11KV 22KV 33KV Instead off 10kv 20kv 30kv..

Answer / vipul mali

because form factor is definded by

ff= r.m.s. value/average value

ff= 1/root 2/ 2f/ pi

ff= 1.11

so all the equipments are disigned with this value.

Is This Answer Correct ?

20 Yes

6 No

WHY TRANSFORMERS ARE RATED IN 11KV 22KV 33KV Instead off 10kv 20kv 30kv..

Answer / eng_entropy

Because these values of voltage are the standard values
which produced by the generators.

Is This Answer Correct ?

5 Yes

47 No

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