9 10 A 230 V shunt motor has a nominal arma- ture current of 60 A. If the armature resist- ance is 0.15 , calculate the following: a. The counter-emf [V] b. The power supplied to the armature [W] c. The mechanical power developed by the motor, [kW] and [hp] a. In Problem 9 calculate the initial starting current if the motor is directly connected across the 230 V line. b. Calculate the value of the starting resistor needed to limit the initial current to 115 A.

Delmar's Standard Textbook Of Electricity
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Author:Stephen L. Herman
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Chapter5: Resistors
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i need the answer for question 10 please! it requires question 9 so I included it there too

9
10
A 230 V shunt motor has a nominal arma-
ture current of 60 A. If the armature resist-
ance is 0.15 , calculate the following:
a. The counter-emf [V]
b. The power supplied to the armature [W]
c. The mechanical power developed by the
motor, [kW] and [hp]
a. In Problem 9 calculate the initial starting
current if the motor is directly connected
across the 230 V line.
b. Calculate the value of the starting resistor
needed to limit the initial current to 115 A.
Transcribed Image Text:9 10 A 230 V shunt motor has a nominal arma- ture current of 60 A. If the armature resist- ance is 0.15 , calculate the following: a. The counter-emf [V] b. The power supplied to the armature [W] c. The mechanical power developed by the motor, [kW] and [hp] a. In Problem 9 calculate the initial starting current if the motor is directly connected across the 230 V line. b. Calculate the value of the starting resistor needed to limit the initial current to 115 A.
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