Fluke 345 FE 345 Users Manual - Page 39

Balanced Three-Phase Power Measurement Connection, Clamp Meter.

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Power Quality Clamp Meter Connection to Circuits Note Carefully observe the direction of the current flow on the top of the Clamp Meter. Note Always adhere to the instructions regarding the sequence of connection. Balanced Three-Phase Power Measurement Connection In three-phase power networks where the load may be considered to be balanced, the Clamp Meter may be used to make some basic measurements such as watts, VA, PF, and kWHr. Note This measurement is only suitable for balanced loads. It is not suitable for measurements other than nominally balanced, due to the consideration of only one current phase. Current is measured on one phase and the two voltages are measured on the remaining phase. Figure 9 shows the three-phase setup screen for the balanced three-phase power measurement. 25

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Power Quality Clamp Meter
Connection to Circuits
25
Note
Carefully observe the direction of the current flow on the top of the
Clamp Meter.
Note
Always adhere to the instructions regarding the sequence of
connection.
Balanced Three-Phase Power Measurement Connection
In three-phase power networks where the load may be considered to be
balanced, the Clamp Meter may be used to make some basic measurements
such as watts, VA, PF, and kWHr.
Note
This measurement is only suitable for balanced loads. It is not
suitable for measurements other than nominally balanced, due to the
consideration of only one current phase.
Current is measured on one phase and the two voltages are measured on the
remaining phase.
Figure 9 shows the three-phase setup screen for the balanced three-phase
power measurement.