Fluke NORMA 6003 User Manual page 31

measure the parameters between the zero and ground line (NORMA 6004/6004+ only). If the ground
and zero lines do not exist, connect the common ends of the 3 channels together and suspend, and
the total power measured is still valid.
For this wiring system:
1. The wiring system has the same impedance characteristics for 3 phases, a balanced
measurement system can be established.
2. The wiring system has a terminal for zero or ground, the common mode component input to the
instrument is small, which reduces the effect of common mode components on the measurement
results.
3. The phase voltage is directly measured, and the line voltage is calculated by Δ. It is more suitable
for measuring systems of star connections.
3P3W3M
For 3P3W3M wiring, 3 voltage measurement channels are respectively bridged between 2 phase
lines; 3 current measurement channels are respectively connected in series with each phase line or
clamped on each phase line with a current sensor.
For this wiring system:
1. This wiring system has the same impedance characteristics for 3 phases, a balanced
measurement system can be established.
2. When measuring the frequency conversion system with the power frequency input, this wiring
system can appropriately eliminate the power frequency component in the frequency
conversion signal, which is conducive to more accurately capturing the conversion frequency.
3. The line voltage is directly measured, and the phase voltage is calculated by Δ. It is more
suitable for measuring systems of Δ connections.
Figure 10. 3P3W3M Wiring
Power Analyzer
Operation
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