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VII. EXPERIMENT: Balanced 3-Phase Y-Y Connected Circuits
PRELIMINARY STUDY:
1. F is 2000 Hz for the 3-phase circuit given in the figure. Determine the line and phase voltage
and current for the load (as amplitude and phase).
2. Find average power that each load used up. Find the average power that load used up.
3. Find the total average power that load used up by using 2-wattmeter method. Compare the
result with you found in step 2.
4. Find the percent ratio of average power that got lost in the transmitting line (single phase) to
the power generated by source (single phase).
EXPERIMENT:
1. F is 2000 Hz for the 3-phase circuit given in the figure. Determine the line and phase
voltage and current for the load (as amplitude and phase).
2. Measure the power that each phase load used up (According to the ground). Measure the
total average power that load used up.
3. Find the total power that load used up by using 2-wattmeter method. Compare the result
with you found in step 2.
4. Measure the average power lost in the transmitting line (single phase) and power
generated by source (single phase). Find the loss ratio.
PURPOSE: The purpose of this experiment is to investigate voltage, current and power
analysis for 3-phase Y-Y connected circuits experimentally and theoretically
Schematic Circuit in Y-Y Connection
CALCULATIONS
We ‘ll see these Y values in calculation part
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If we calculate these power
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2
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Conclusion and Comment
we observed balanced 3 phase Y-Y circuits , We've seen different methods of Finding Power and
We have seen that Phase current is equal to line current in Y-Y connection. We saw the 3-phase
effect of SINGLE Phase
VIII. EXPERIMENT: Balanced 3-Phase Delta - Delta Connected Circuits
PRELIMINARY STUDY:
For the 3-phase circuit in the figure f is 2000 Hz
1. Determine the currents IAB, IBC, ICA, IaA, IbB, IcC, Iba, Icb, Iac.
2. Find the voltages VAB, VBC, VCA.
3. Calculate the power in each phase of the load.
EXPERIMENT:
1. Measure the currents IAB, IBC, ICA, IaA, IbB, IcC, Iba, Icb, Iac.
2. Measure voltages VAB, VBC, VCA.
3. Measure the power in each phase of the load.
CONCLUSION and COMMENTS
1. Report all the procedures and measurements done in the experiment section. Add your
comments.
2. Compare the theorical and measurement values of the circuit.
I added resistors on the source side for the simulation to work correctly.
GRAPHS
As you see these values in the calculation part
Line Current
Phase Current
We know in delta-delta connection phases and lines voltages are equal for this graph
Source Currents
Power graph
Conclusion and Comment
we observed balanced 3 phase Delta-Delta circuits , We have seen that Phase voltage is equal to
line voltage in Delta-Delta connection. We saw the 3-phase effect of SINGLE Phase. We saw the
kirchoff’s voltage and current law in the phasor area in the other hand we saw these phasor
degrees.
