A240 v, 60 hz squirrel-cage induction motor has a full-load slip of 0.02 and a full-load speed of 1764 rpm. the winding resistance of the rotor is 0.6 ω and a winding reactance of 5 ω at 60 hz. determine the rotor current at full-load. a. ir =-3.53 a b. ir= 7.89 a c. ir= 237 a d. ir= 1.18 a

full load current = 7.891151 A

so correct option is b. Ir= 7.89

Explanation:

given data

Energy E = V = 240 V

frequency =  60 Hz

full-load slip = 0.02

full-load speed = 1764 rpm

winding resistance = 0.6 Ω

winding reactance = 5 Ω

to find out

rotor current at full-load

solution

we will apply here full load current formula that is express as

full load current =    ...................1

here S is full-load slip and E is energy given and R is winding resistance and    X is winding reactance

put here value we get

full load current =  

full load current = 7.891151 A

so correct option is b. Ir= 7.89

it was a fall down when it happens

explanation: