The test results for the approximate equivalent
circuit of a three-phase induction motor are shown below.
No-load test: equivalent applied voltage 120 V, input current 5 A,
equivalent input 480 W
Restraint test: Applicable voltage 20V, input current 40A,
equivalent input 480W
Determine the equivalent circuit constants of Rc, Xm,
Rs + Rr, and Xs + Xr
when friction and wind losses are ignored.
Answer - 30Ω, 40Ω, 0.3Ω, 0.4Ω