PREPARATORY WORK FOR 3 PHASE 4 WIRE FEEDER
SUBMIT THE PREPARATORY WORK BEFORE YOU PERFORM THE EXPERIMENT.
You are given experimental set up consisting of power supply, transmission line and load modules and
meters. You have to complete all the connections before coming to the lab session.
Note that all loads are in STAR connection. 1)
Experiment 1
Draw the circuit connection of 3-phase 4 wire system together with all the meters in Figure 1.
You are also required to show connection used to measure the line current, (IL) the voltage across
resistance, (VR) and the voltage across resistance (R) series with inductance (L), VRL.
2)
Experiment 2
Draw the circuit connection of 3-phase 4 wire system with RL load in Figure 2. The connections
of meters for line currents, phase voltage and neutral current measurement need to be shown.
3)
Experiment 3
Modify the drawing circuit connection in (2) with only resistive load in Figure 3.
EQUIPMENT
Model No.
Item
DL 2108TAL
3 Phase Power Supply
1
DL 7901TT
Overhead Line Model
1
DL 2109T1PV
Voltmeter
3
DL 1017R
Resistive Load
1
DL 1017L
Inductive Load
1
DL2109T2A5
Ammeter / Multimeter
4
Quantity
R YB
R
Y
B
N
R
Y
R
R
B
N
Y
Y
R Y B
B
B
N
N
Figure 1
R Y B
R YB
R
Y
B
N
R
Y
B
N
R
R
Y
Y
RY B
B
B
N
N
Figure 2
R Y B
R YB
R
Y
B
N
R
Y
R
R
B
N
Y
Y
R Y B
B
B
R Y B
N
N
Figure 3