without any theoretical calculations, can u approximately tell the current rati

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without any theoretical calculations, can u approximately
tell the current rating of a motor(above 30hp)working at 415VAC.

Question Posted / phanidhar

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without any theoretical calculations, can u approximately tell the current rating of a motor(above ..

Answer / venu

As per thumb rule the current rating of a motor working at
415vac
equals to double the KW rating (and -2% of double the KW)

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5 Yes

1 No

without any theoretical calculations, can u approximately tell the current rating of a motor(above ..

Answer / shahid

Thumb rule to calculate the current of all d LT ac motors
is:

A = 1.7*KW

Is This Answer Correct ?

5 Yes

1 No

without any theoretical calculations, can u approximately tell the current rating of a motor(above ..

Answer / azarudeen

Above 40A (if efficiency of motor - 90% & PF - .8)

FORMULA: I = (HP*746)/(1.732*415*Eff*PF)

Is This Answer Correct ?

4 Yes

3 No

without any theoretical calculations, can u approximately tell the current rating of a motor(above ..

Answer / dheeraj soni

As per thumb rule motor working at 415 ac their current
rating is aprroximately 1.5 times of its HP Rating

Is This Answer Correct ?

2 Yes

1 No

without any theoretical calculations, can u approximately tell the current rating of a motor(above ..

Answer / arsenal

actually how is the thumb rule obtained......is there any
derivation.........

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0 Yes

0 No

without any theoretical calculations, can u approximately tell the current rating of a motor(above ..

Answer / yogender goel

As per the Thumb Rule,

Current = (Motor HP x 1.5)-10% of the total

Example: If we want to calculate the current of the 100Hp
motor then
current = (100 x 1.5)-10% = 150-15 = 135 Amp.

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0 Yes

0 No

without any theoretical calculations, can u approximately tell the current rating of a motor(above ..

Answer / m. madhu sudhanarao

As per thumb rule Motor current rating at 415AC is
approximately 1.6times the KW rating.

Is This Answer Correct ?

0 Yes

1 No

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