a balanced wye delta connection..

by mingming
Tags: balanced, connection, delta
mingming is offline
Jul7-11, 04:59 AM
P: 5
1. The problem statement, all variables and given/known data
A balanced delta load having 18ohm resistance and 24 capacitive reactance in series in each phase is supplied through lines each having 1 ohm resistance and 2 ohm inductive reactance. If the line to line voltage at the sending end is 250 V, find the phase current and line currents.
2. Relevant equations
Zy = 1/3 Z delta

3. The attempt at a solution
i first convert the delta load to wye so the load now becomes Zy= (6-j8) and then i add the line impedance and load impedance...Zeq= (6-j8)+ (1+j2) = 7-j6 and then i solved for the line currents and phase currents which is equal for wye Ip=Il= 144.34/ 9.22 angle of -40.60
it's answer is 15.66 angle of 40.60 degrees...THIS IS WHERE I AM CONFUSED HOW DO I SOLVE THE PHASE CURRENTS AND LINE CURRENTS WHEN THE LOAD IS IN DELTA...it is not supposed to be equal since the load is in delta...please help ...
Phys.Org News Partner Science news on Phys.org
NASA's space station Robonaut finally getting legs
Free the seed: OSSI nurtures growing plants without patent barriers
Going nuts? Turkey looks to pistachios to heat new eco-city

Register to reply

Related Discussions
Question about balanced wye - delta connection.. Electrical Engineering 1
delta wye connection using 3 small transformers Electrical Engineering 5
Spin connection vs. Christoffel connection High Energy, Nuclear, Particle Physics 3
Balanced equations Chemistry 5
Balanced Lines...? Electrical Engineering 1