What is the input current of a 2 hp single phase motor, 240 V at 70 % efficiency and 0.8 power factor?
a. DOL starter
b. Rotor resistance starter
c. Autotransformer starter
d. All of these
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Answered by
1
Answer:
D is a right answer so much
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The input current is 11.1 A.
Given that,
Output power rating of single phase Induction motor = 2HP
= 2 x 746W
= 1492 W.
Supply voltage (V) = 240V
Efficiency = 70% = 0.7
Power factor = 0.8
We know that, ,
where O/P is output power and I/P is input power
Input power, I/P =
=
= 2131.43 W
Now, P = V x I x power factor
2131.43 = 240 x I x 0.8
⇒ I =
= 11.1 A
Thus the input current is 11.1 A.
- The quantity of energy put into a device is referred to as input, and the amount of energy that comes out is referred to as output.
- The type of energy can be altered by a technology, but not its quantity.
- For instance, a light bulb uses electrical energy as its input energy and produces light and heat as its output energy.
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