an impedance box consist of 3-phase delta load each phase consists of coil having an internal resistance RL and self-inductance l this coil is connected in paralle with a capacitor we make the following:
a-if a 20v dc is supplied between any two terminals of three terminals the line current will be 300mA.
b-a 3-phase supply10sin(10000t)is applied to the load when we use two watt-meter method the reading of wattmeter are 8w and 2.15w.
c-if a single ac supply is applied between two terminals we find the resonance freq equal to zero
find value of R,L ,C
a-if a 20v dc is supplied between any two terminals of three terminals the line current will be 300mA.
b-a 3-phase supply10sin(10000t)is applied to the load when we use two watt-meter method the reading of wattmeter are 8w and 2.15w.
c-if a single ac supply is applied between two terminals we find the resonance freq equal to zero
find value of R,L ,C