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1.
Overview of the unit
1.5 Multi-circuit metering
Multi-circuit metering is possible with this product. Measuring circuit refers to the measurement point where electricity
measuring is conducted. Furthermore, this product measures voltage commonly across all circuits and measures
current with each separate circuit by using generic CTs.
●
Maximum number of measuring circuits for each phase
and wire type
You can connect up to 4 generic CTs to this unit. The phase and wire types and the usable number of measuring
circuits are shown in the following table.
Refer to "2.8Wiring diagrams (
35)" for more on wiring each of the phase and wire types.
• Set 1-phase 2-wire voltage selected when measuring multiple 1-phase 2-wire with different phases branching off a
1-phase 3-wire switchboard.You can measure 1-phase 2-wire by selecting the corresponding voltage.
• Set 1-phase 3-wire composite to measure both the main 1-phase 3-wire switchboard and a 1-phase 2-wire
branching off.
You can measure 1-phase 2-wire by selecting the corresponding voltage.
• Refer to "5.1Voltage assignment (
58)" for more on 1-phase 2-wire voltage selected and 1-phase 3-wire
composite.
Phase and wire type
Abbreviatio
ns for
phase and
wire types
Maximum number of
measuring circuits
Circuits used
3-phase 4-wire
3P4W
1 circuit
Circuit A
1-phase 2-wire
1P2W
4 circuit
Circuit A, Circuit B, Circuit C, Circuit D
1-phase 3-wire
1P3W
2 circuit
Circuit A, Circuit C
3-phase 3-wire
3P3W
2 circuit
Circuit A, Circuit C
1-phase 2-wire
voltage selected
1P2W2
4 circuit
Circuit A, Circuit B, Circuit C, Circuit D
1-phase 3-wire
composite
1P3W2
1-phase 3-wire: 1 circuit
Circuit A
1-phase 2-wire: 2 circuit
Circuit C, Circuit D
