Amprobe PQ55A Power-Analyzer - Manual (Page 19)

Three-phase Power Measurement, Star connection –
type of connection 3P4W
1) Switch on the instrument.
2)
Select the type of connection 3P4W using the “Wiring” function key (6).
After selection, the following display is indicated with the symbol 3P4W (5.11):
Display Type of connection 3P4W
The measurement inputs are con
nected as illustrated in the following
drawing:
Type of connection 3P4W
L1: phase 1
L2: phase 2
L3: phase 3
N: neutral conductor
G: protective earth
☞ Shaft direction (X1) (see also page 12)
☞ Current flow direction: The printed arrow on the clamp adapter must point to
the electric power supply.
☞ The printed arrow on the clamp adapter must point to the electric power supply.
Connect the test leads to the measurement instrument as follows:
1) Connect black test lead to socket N.
2) Connect red test lead to socket U1.
3) Connect yellow test lead to socket U2.
4) Connect blue test lead to socket U3.
5) Connect clamp adapter 1 to socket I1.
6) Connect clamp adapter 2 to socket I2.
7) Connect clamp adapter 3 to socket I3.
8) Connect clamp adapter 4 to socket I4.
Now, connect the tests leads using the alligator clips and the clamp adapter to
the electric power supply to be tested.
1) Connect black test lead to neutral conductor N.
2) Connect red test lead to phase L1.
3) Connect yellow test lead to phase L2.
4) Connect blue test lead to phase L3.
5)
Open the clamp adapter 1 using the clamp opening lever and surround the live phase L1.
☞ Make sure that the clamp completely surrounds the conductor and that there is no air gap.
1) Connect in the same way clamp adapter 2 to the phase L2.
2) Connect in the same way clamp adapter 3 to the phase L3.
3) Connect the clamp adapter 4 in the same way to the neutral conductor N.
19
I1
I3
I2
I4
U1 U2 U3
N
CURRENT PROBE
CAT III 600V ALL INPUT
INPUT: 0,35mV/A
0.35V MAX
L1
red
black
Curr
ent Supply
Consumer
yellow
L2
L3
blue