without any theoretical calculations, can u approximately
tell the current rating of a motor(above 30hp)working at 415VAC.
Answers were Sorted based on User's Feedback
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)
Is This Answer Correct ? | 5 Yes | 1 No |
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 |
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 |
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 |
Answer / arsenal
actually how is the thumb rule obtained......is there any
derivation.........
Is This Answer Correct ? | 0 Yes | 0 No |
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.
Is This Answer Correct ? | 0 Yes | 0 No |
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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