Electromechanical Energy Conversion I
EASTERN MEDITERRANEAN
UNIVERSITY
DEPARTMENT OF ELECTRICAL &
ELECTRONIC ENGINEERING
EENG 350 LAB
Electromechanical Energy Conversion I
EXPERIMENT 2
Three Phase Transformer
Std. No, Name & Surname:
1. ................. .............................................................................…………………….
2. ................. .............................................................................…………………....
3. ................. ...................................................................................................……..
4. ................. ...................................................................................................……..
Group No: ...................................................
Submitted to: ..............................................
Date: ............................................................
©Reza Shahrara
EENG350
Electromechanical Energy Conversion I
EENG350
Y - Y Connection
I.
Construct the Y -Y connection on the primary and secondary of the Three Phase
transformer, with the secondary side open circuited
circuited as give n in Figure 1. Use 40v AC line
to line in this experiment.
Figure 1
II.
Switch on the Three Phase AC Power Supply and record the line to line and line to neutral
Voltages and record in the Table 1.
Primary Side Line to
Line Voltage
V(AB)Line
Primary Side Line to
Neutral VoltageV(AN)
Phase
Secondary Side Line
to Line Voltage
V(ab)Line
Secondary Side Line
to Neutral
Voltage V(an) Phase
........... V
........... V
........... V
........... V
Table 1
∆ - ∆ Connection
I.
Construct the ∆ - ∆ connection on the primary and secondary of the Three Phase
transformer, with the secondary side open circuited as given in Figure 2.
Figure 2
Electromechanical Energy Conversion I
II.
EENG350
Switch on the Three Phase AC Power Supply and record the line to line and line to neutral
Voltages and record in the Table 2.
Primary Side Line to Line Voltage
Secondary Side Line to Line Voltage
........... V
........... V
Table 2
∆-Y Connection
I.
Construct the ∆-Y connection on the primary and secondary of the Three Phase
transformer, with the secondary side open circuited as given in Figure 3.
II.
Switch
witch on the Three Phase AC Power Supply and record the line to line and line to
neutral Voltages and record in the Table 3.
Figure 3
Primary Side Line to Line
Voltage
........... V
Secondary Side Line to
Line Voltage
Secondary Side Line to
Neutral Voltage
........... V
........... V
Table 3
Y - Y Connection
Balanced and Unbalanced Load Connection at the Output
I.
Construct the Y - Y connection on the primary and secondary of the Three Phase
transformer, with the secondary side connected to Y Connected Load as given in Figure 4.
Electromechanical Energy Conversion I
EENG350
Figure 4
II.
III.
Switch on the Three Phase AC Power Supply and record the line to line and line to neutral
voltages and currents. Neutral – Neutral current between the secondary of the transformer
and the balanced load also measure the power on the secondary side of the transformer
using a Three Phase WATTMATER and record in the Table 4. (The load is balanced)
Repeat this for unbalanced load.
V L-L Primary Side
V L-N Secondary
Side
V L-N Primary Side
…………..V
V L-L Primary Side
V L-N Secondary
Side
V L-N Primary Side
…………..V
…………..V
…………..V
…………..V
…………..V
BALANCED LOAD
I Phase Primary Side
…………..A
I Phase Secondary
Side
…………..A
I N-n
…………..A
UNBALANCED LOAD
I Phase Primary Side
…………..A
I Phase Secondary
Side
…………..A
I N-n
…………..A
Table 4
Power
………..W
Power
………….W
Electromechanical Energy Conversion I
Conclusion:
©Reza Shahrara
EENG350